1
|
Falconí-Páez C, González-Vaca C, Guarneri J, Fahl N, Aliaga-Sancho P, Mendez-Bauer ML, Galvão Arrais CA, Dávila-Sánchez A. The Impact of Modeling Liquids on Surface Roughness and Color Properties of Bulkfill Resin Composites After Simulated Tooth Brushing: An in Vitro Study. Part I. J ESTHET RESTOR DENT 2024. [PMID: 39295161 DOI: 10.1111/jerd.13314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 07/28/2024] [Accepted: 08/25/2024] [Indexed: 09/21/2024]
Abstract
OBJECTIVE To evaluate the effect of different modeling agents on color changes, surface roughness, and translucency parameters over time in Bulkfill resin composites. MATERIAL AND METHODS Sixty specimens were prepared using three Bulkfill resin composites (Tetric N-Ceram Bulkfill, Filtek One Bulkfill and Opus Bulkfill) and three modeling agents (Wetting Resin, Optibond FL and Ambar APS). All specimens were subjected to a simulated tooth-brushing (Baseline, 50.000 cycles, 100.000 cycles), and surface roughness was measured at each interval. Surface topography was evaluated. The translucency parameter and color changes were assessed after 24-h, 7-, 14- and 30-day immersion in water, wine, and coffee. Data was analyzed using ANOVA and Bonferroni test. RESULTS All specimens increased roughness after simulated tooth-brushing (p < 0.05). Wetting Resin decreased roughness on Tetric N-Ceram Bulkfill (p < 0.05). The translucency parameter remained unaltered for all groups. All groups changed color after 30-days of immersion in wine and coffee (p < 0.05). Ambar APS and Wetting Resin on Tetric N-Ceram Bulkfill showed higher color changes when immersed in coffee (p < 0.05). CONCLUSION The use of modeling agents does not jeopardize translucency properties but may affect surface roughness and color properties of Bulkfill resin composites depending on their composition. CLINICAL SIGNIFICANCE The findings of this study suggest that surface roughness and color properties are affected by the differences in the composition between modeling agents and Bulkfill resins composites.
Collapse
Affiliation(s)
- Camila Falconí-Páez
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Paraná, Brazil
| | - Claudia González-Vaca
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Paraná, Brazil
- Department of Restorative Dentistry and Dental Materials, School of Dentistry, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Juliana Guarneri
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Paraná, Brazil
| | - Newton Fahl
- Private Practice, Curitiba, Brazil
- Clinical and Scientific Director, Fahl Center, Curitiba, Brazil
- University of North Carolina at Chapel Hill, North Carolina, USA
| | - Paulina Aliaga-Sancho
- Department of Restorative Dentistry and Dental Materials, School of Dentistry, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Maria Lujan Mendez-Bauer
- Research Department, School of Dentistry, University Francisco Marroquin, Guatemala City, Guatemala
| | | | - Andrés Dávila-Sánchez
- Department of Restorative Dentistry and Dental Materials, School of Dentistry, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| |
Collapse
|
2
|
Mossad Hassan Negm H, Yousry Elkharadly D, Badawy S, Rashad Omar Omar Taha R. Fracture Resistance in Fibre-Reinforced Resin Composite Restorations in Deciduous and Permanent Molars: An Ex Vivo Study. Saudi Dent J 2024; 36:1197-1202. [PMID: 39286592 PMCID: PMC11402000 DOI: 10.1016/j.sdentj.2024.06.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 06/05/2024] [Accepted: 06/11/2024] [Indexed: 09/19/2024] Open
Abstract
Aim The aim of this study was to compare the fracture resistance levels of restored deciduous teeth and permanent molars restored with different materials, including ultra-polyethylene fibre tape (Ribbond-Ultra), fibre-reinforced resin composite EverX posterior, fibre-reinforced flowable resin composite EverX Flow and bulk-fill flow restorative material (Tetric N-flow) in the posterior region. Methods We tested sixty-four caries-free human mandibular molars (32 deciduous molars and 32 permanent molars). Deep and wide Class I cavities were prepared in each tooth. The teeth were embedded in poly(methyl methacrylate) resin up to the cementoenamel junction, leaving the crown completely exposed. Oral temperature fluctuations were then simulated using two thousand thermocycling cycles, each lasting 30 seconds in the hot phase (approximately 35 °C). The loading rate for our force-fracture tests was set at 0.5 mm/min. Direct restorations were made using a spherical tip and applying the force perpendicular to the sample surface. Visual inspection of the fractured specimens, in combination with adhesive scanning electron microscopy (SEM) and finite element analysis (FEA), provided detailed insights into the failure modes and stress distribution at the restoration-tooth interface. Results Teeth restored with fibre-reinforced composite (EverX Posterior) had the highest fracture resistance, followed by fibre-reinforced flowable resin composite (EverX Flow). Teeth restored with the ultra- polyethylene fibre tape (Ribbond-Ultra), followed by the flowable bulk-fill composite (Tetric N-flow) had the lowest resistance. Statistical analysis revealed significant differences between the groups, except for EverX Posterior and EverX Flow. A predictive algorithm was also proposed for the likelihood of restoration failure. Conclusion Modern fibre-reinforced resin composites, such as EverX Posterior, effectively reinforce teeth against fractures, with success in both restored deciduous and permanent molars. Meanwhile, the use of polyethylene fibre tapes is less effective, and they involve a time-consuming application.
Collapse
Affiliation(s)
| | | | - Sherine Badawy
- Department of Pediatric Dentistry, University of Science and Technology of Fujairah, UAE
| | | |
Collapse
|
3
|
Soares BM, Barbosa MP, de Almeida RV, Jardim RN, da Silva EM. Marginal integrity and physicomechanical properties of a thermoviscous and regular bulk-fill resin composites. Clin Oral Investig 2024; 28:496. [PMID: 39177835 DOI: 10.1007/s00784-024-05887-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Accepted: 08/13/2024] [Indexed: 08/24/2024]
Abstract
OBJECTIVES To evaluate the marginal integrity (MI%) and to characterize specific properties of a thermoviscous bulk-fill resin composite, two regular bulk-fill resin composites, and a non-bulk-fill resin composite. MATERIALS AND METHODS VisCalor bulk (VBF), Filtek One Bulk Fill (OBF), and Aura Bulk Fill (ABF) were evaluated. Filtek Z250 XT (ZXT) was used as non-bulk-fill control. MI% was evaluated in standardized cylindrical cavities restored with the composites by using a 3D laser confocal microscope. The following properties were characterized: volumetric polymerization shrinkage (VS%), polymerization shrinkage stress (Pss), degree of conversion (DC%), microhardness (KHN), flexural strength (FS), and elastic modulus (EM). Data were analyzed by one-way and two-way ANOVA, and Tukey HSD post-hoc test (α = 0.05). RESULTS VBF presented the highest MI% and the lowest VS% and Pss (p < 0.05). DC% ranged from 59.4% (OBF) to 71.0% (ZXT). ZXT and VBF presented similar and highest KHN than OBF and ABF (p < 0.05). ABF presented the lowest FS (p < 0.05). EM ranged from 5.5 GPa to 7.7 GPa, with the values of ZXT and VBF being similar and statistically higher than those of OBF and ABF (p < 0.05). CONCLUSIONS Thermoviscous technology employed by VisCalor bulk was able to improve its mechanical behavior comparatively to regular bulk-fill resin composites and to contribute to a better marginal integrity in restorations built up in cylindrical cavities with similar geometry to a class I cavity as well. Although presenting overall better physicomechanical properties, Z250 XT presented the worst MI%. CLINICAL RELEVANCE The marginal integrity, which is pivotal for the success of resin composite restorations, could be improved using VisCalor bulk-fill. The worst MI% presented by Z250 XT reinforces that non-bulk-fill resin composites shall not be bulk-inserted in the cavity to be restored.
Collapse
Affiliation(s)
- Bárbara Monteiro Soares
- Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Marianna Pires Barbosa
- Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Rayane Velloso de Almeida
- Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Renata Nunes Jardim
- Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Eduardo Moreira da Silva
- Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
- Universidade Federal Fluminense/Faculdade de Odontologia -Rua Mário Santos Braga, nº 30 - Campus Valonguinho, Centro, Niterói, RJ, CEP 24040, Brazil.
| |
Collapse
|
4
|
Weimann D, Fleck C, Razi H. Marginal integrity in minimally invasive molar resin composite restorations: Impact of polymerization shrinkage. J Mech Behav Biomed Mater 2024; 155:106554. [PMID: 38676971 DOI: 10.1016/j.jmbbm.2024.106554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 04/29/2024]
Abstract
OBJECTIVES This study utilized non-linear finite element (FE) models to explore polymerization shrinkage and its impact on marginal integrity in molars following both selective caries removal (SCR) and conventional treatment. Specifically, we performed 2D in silico simulations to study residual stresses post-resin polymerization shrinkage and their influence on the marginal integrity of various restoration types. METHODS Initially, FE models were developed based on a cohesive zone framework to simulate crack propagation along the bonded interfaces between restoration and tooth structure in SCR-treated molars with class I and class II restorations. The modeled resin composite restorations first underwent polymerization shrinkage and were then subjected to various occlusal loading conditions. Stress magnitudes and distributions were identified to evaluate the margin integrity and predict the mechanism and location of interfacial failure. RESULTS AND DISCUSSION The FE models computed polymerization shrinkage stresses of less than 1 MPa, exerting a minor influence on the composite/tooth interface. Occlusal loading, however, significantly impacted the load-bearing capacity of the composite/tooth (c/t) interface, potentially jeopardizing the restoration integrity. Especially under bi-axial occlusal loading, interfacial debonding occurred in the vertical cavity walls of the class I restorations, increasing the risk of failure. Notably, SCR-treated teeth exhibited better margin integrity than restored teeth after complete caries removal (NCR). These findings provide valuable insights into the mechanical behavior of SCR-treated teeth under different loading conditions and highlight the importance of considering the load scenarios that may lead to failure at the c/t interface. By investigating the factors influencing crack initiation and delamination, this novel research contributes to the optimization of restorative treatments and aids in the design of more resilient dental restorations.
Collapse
Affiliation(s)
- Dominique Weimann
- Materials Science and Engineering, Technische Universität Berlin, Berlin, Germany
| | - Claudia Fleck
- Materials Science and Engineering, Technische Universität Berlin, Berlin, Germany.
| | - Hajar Razi
- ETH Zurich, Zurich, Switzerland; WoodTec Group, Cellulose & Wood Materials Laboratory, Empa, Dübendorf, Switzerland.
| |
Collapse
|
5
|
Chen WC, Lai TW, Li CL, Chen TYF, Chang CH, Chuang SF. Assessments of polymerization shrinkage by optical coherence tomography-based digital image correlation analysis-Part II: Effects of restorative composites. Dent Mater 2024; 40:1064-1071. [PMID: 38777732 DOI: 10.1016/j.dental.2024.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 04/27/2024] [Accepted: 05/03/2024] [Indexed: 05/25/2024]
Abstract
OBJECTIVES To examine the polymerization shrinkage of different resin-based composite (RBC) restorations using optical coherence tomography (OCT) image-based digital image correlation (DIC) analysis. METHODS The refractive index (RI) of three RBCs, Filtek Z350XT (Z350), Z350Flowable (Z350F), and BulkFill Posterior (Bulkfill), was measured before and after polymerization to calibrate their axial dimensions under OCT. Class I cavities were prepared in bovine incisors and individually filled with these RBCs under nonbonded and bonded conditions. A series of OCT images of these restorations were captured during 20-s light polymerization and then input into DIC software to analyze their shrinkage behaviors. The interfacial adaptation was also examined using these OCT images. RESULTS The RI of the three composites ranged from 1.52 to 1.53, and photopolymerization caused neglectable increases in the RI values. For nonbonded restorations, Z350F showed maximal vertical displacements on the top surfaces (-16.75 µm), followed by Bulkfill (-8.81 µm) and Z350 (-5.97 µm). In their bonded conditions, all showed increased displacements. High variations were observed in displacement measurements on the bottom surfaces. In the temporal analysis, the shrinkage of nonbonded Z350F and Bulkfill decelerated after 6-10 s. However, Z350 showed a rebounding upward displacement after 8.2 s. Significant interfacial gaps were found in nonbonded Z350 and Z350F restorations. SIGNIFICANCE The novel OCT image-based DIC analysis provided a comprehensive examination of the shrinkage behaviors and debonding of the composite restorations throughout the polymerization process. The flowable composite showed the highest shrinkage displacements. Changes in the shrinkage direction may occur in nonbonded conventional composite restorations.
Collapse
Affiliation(s)
- Wei-Chi Chen
- School of Dentistry and Institute of Oral Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Dentistry, Sin-Lau Hospital, Tainan, Taiwan
| | - Ting-Weng Lai
- School of Dentistry and Institute of Oral Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Stomatology, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Chia-Ling Li
- School of Dentistry and Institute of Oral Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Terry Yuan-Fang Chen
- Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Chih-Han Chang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Shu-Fen Chuang
- School of Dentistry and Institute of Oral Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Stomatology, National Cheng Kung University Hospital, Tainan, Taiwan.
| |
Collapse
|
6
|
Yang X, Yang Y, Li Y, Li Z, Zhang Y, He X, Yang J. Real-time imaging and quantitative analysis of internal gap formation in bulk-fill and conventional resin composites: An OCT evaluation. Photodiagnosis Photodyn Ther 2024; 47:104103. [PMID: 38677500 DOI: 10.1016/j.pdpdt.2024.104103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 04/19/2024] [Accepted: 04/24/2024] [Indexed: 04/29/2024]
Abstract
BACKGROUND This study used optical coherence tomography (OCT) to observe real-time internal gap formation in both bulk-fill and conventional resin composites. It aimed to provide a quantitative analysis of variations, addressing the inconclusive nature of microleakage assessment caused by differences in testing methods. METHODS Fifty extracted third molars prepared with Class I cavities, were divided into five groups (n = 10). Conventional resin Filtek Z350 XT (FZX) was applied with a double-layer filling of 2 mm per layer. Bulk-fill resins X-tra fil (XTF), Filtek Bulk Fill Posterior Restorative (FBP), Surefil SDR Flow + (SDR), and Filtek Flowable Restorative (FFR) were applied with a single-layer filling of 4 mm. Real-time OCT imaging was conducted during light curing. Post-curing, the entire sample was OCT-scanned. Following this, ImageJ software was used to measure the gap (G1 %). Subsequently, thermal cycling (TC) (5000 times, 5 °C-55 °C) was applied, followed by OCT scanning to calculate the gap (G2 %) and ΔG%. Data were analyzed using two-way repeated measures ANOVA, Kruskal-Wallis test, and Duncan's test (α=0.05). RESULTS There was no significant difference in G1 % among the groups (p > 0.05). Following TC, FZX exhibited the highest G2 %, succeeded by FFR, FBP, XTF, and SDR, with SDR demonstrating the lowest G2 % (p < 0.05). FZX showed the highest ΔG% (p < 0.05), while SDR exhibited the lowest ΔG% (p < 0.05). CONCLUSION OCT proves to be a promising tool for detecting microleakage. TC exerted a more significant negative impact on conventional resin. Surefil SDR Flow + displayed the least microleakage, both before and after TC.
Collapse
Affiliation(s)
- Xinyu Yang
- Department of Cariology & Endodontics, The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University, Nanchang 330006, Jiangxi, China; Jiangxi Province Key Laboratory of Oral Biomedicine, Nanchang 330006, Jiangxi, China
| | - Yuhao Yang
- Department of Cariology & Endodontics, The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University, Nanchang 330006, Jiangxi, China; Jiangxi Province Key Laboratory of Oral Biomedicine, Nanchang 330006, Jiangxi, China
| | - Yingji Li
- Key Laboratory of Opto-Electronic Information Science and Technology of Jiangxi Province and Jiangxi Engineering Laboratory for Optoelectronics Testing Technology, Nanchang Hangkong University, Nanchang 330063, Jiangxi, China
| | - Zekun Li
- Department of Cariology & Endodontics, The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University, Nanchang 330006, Jiangxi, China; Jiangxi Province Key Laboratory of Oral Biomedicine, Nanchang 330006, Jiangxi, China
| | - Yubao Zhang
- Key Laboratory of Opto-Electronic Information Science and Technology of Jiangxi Province and Jiangxi Engineering Laboratory for Optoelectronics Testing Technology, Nanchang Hangkong University, Nanchang 330063, Jiangxi, China
| | - Xingdao He
- Key Laboratory of Opto-Electronic Information Science and Technology of Jiangxi Province and Jiangxi Engineering Laboratory for Optoelectronics Testing Technology, Nanchang Hangkong University, Nanchang 330063, Jiangxi, China
| | - Jian Yang
- Department of Cariology & Endodontics, The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University, Nanchang 330006, Jiangxi, China; Jiangxi Province Key Laboratory of Oral Biomedicine, Nanchang 330006, Jiangxi, China.
| |
Collapse
|
7
|
Lee CH, Lee IB. Three methods to measure the photopolymerization kinetics for different radiant emittance and composite type. Dent Mater J 2024; 43:207-215. [PMID: 38296511 DOI: 10.4012/dmj.2023-197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
Abstract
Photopolymerization kinetics affects the curing time, degree of conversion, polymerization shrinkage, and mechanical properties of composites. The aim of this study was to compare three methods (temperature, heat flow, and polymerization shrinkage) for photopolymerization kinetics measurement of composites. The photopolymerization kinetics of four composites (2 packable and 2 flowable) were measured with an LED light for 20 s (radiant emittance: 2,100 mW/cm2). For the two packable composites, photopolymerization kinetics was measured with varying the radiant emittance and exposure time. For each measurement method, peak times were determined as the time when maximum temperature rise, heat flow, and shrinkage rate occurred, respectively. The photopolymerization kinetics differed among the measurement methods. The photopolymerization kinetics of composites changed as the radiant emittance and composite type varied. In clinical practice and research on the composite restoration, the kinetics should be considered comprehensively with the complementary use of various measurement methods.
Collapse
Affiliation(s)
- Chang-Ha Lee
- Department of Conservative Dentistry, School of Dentistry and Dental Research Institute, Seoul National University
| | - In-Bog Lee
- Department of Conservative Dentistry, School of Dentistry and Dental Research Institute, Seoul National University
| |
Collapse
|
8
|
Çağırır Dindaroğlu F, Yılmaz E. Two-year evaluation of a nano-hybrid and a bulk-fill resin composite: a randomized, double-blind split-mouth clinical study. Clin Oral Investig 2024; 28:208. [PMID: 38467942 PMCID: PMC10927878 DOI: 10.1007/s00784-024-05592-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 02/26/2024] [Indexed: 03/13/2024]
Abstract
OBJECTIVES The aim of this study was to compare the 2-year clinical performance of a bulk-fill composite resin and a nano-hybrid-filled composite resin in 6-12-year-old children in a split-mouth design. MATERIALS AND METHODS This randomized, split-mouth, and double-blind study was conducted on 89 patients aged 6-12 years with caries on bilateral mandibular first molars. In a split-mouth design, restorations of mandibular permanent molars were completed with nano-hybrid organically modified ceramic (ORMOCER)-based bulk-fill composite resin Admira Fusion x-tra (Voco GmbH, Cuxhaven, Germany) and nano-hybrid composite Grandio (Voco, Cuxhaven, Germany). Futurabond U single dose (Voco, Cuxhaven, Germany) was used with selective enamel etching. The clinical success of the restorations was evaluated using USPHS and FDI criteria at 6, 12, and 24-month follow-up controls. RESULTS In the 2-year follow-up, all restorations were clinically acceptable. Grandio was significantly worse than Admira Fusion x-tra in terms of surface luster and superficial change (p < 0.05). Surface staining and color match scores increased in Admira Fusion x-tra compared with Grandio significantly (p < 0.05). CONCLUSIONS Although both materials showed acceptable clinical performance over 2 years, a significant difference was observed between the surface luster, surface staining, marginal adaptation, and staining of the nano-hybrid composite placed with the incremental technique and the bulk-fill ORMOCER-based composite resin. CLINICAL RELEVANCE As an alternative to nano-hybrid composite resins, using bulk-fill restorative materials, which can be indicated in the proper case, may contribute to shortening treatment procedures and increasing patient and physician comfort, leading to clinical success.
Collapse
Affiliation(s)
- Funda Çağırır Dindaroğlu
- İzmir Katip Çelebi University, School of Dentistry, Department of Pediatric Dentistry, İzmir, Turkey.
| | - Ece Yılmaz
- İzmir Katip Çelebi University, School of Dentistry, Department of Pediatric Dentistry, İzmir, Turkey
- Private Practice, Istanbul, Turkey
| |
Collapse
|
9
|
Calazans FS, Ferreira TDMJ, Ñaupari-Villasante R, Mendonça RP, Ornellas G, Albuquerque EG, Tardem C, de Miranda MS, Barceleiro MO, Loguercio AD. Influence of surface sealants on the quality of posterior restorations with bulk-fill composites: A 4-year randomized clinical trial. Dent Mater 2024; 40:466-476. [PMID: 38142146 DOI: 10.1016/j.dental.2023.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 12/09/2023] [Accepted: 12/11/2023] [Indexed: 12/25/2023]
Abstract
OBJECTIVES The aim of this study was to evaluate the clinical performance of surface sealants associated with a bulk-fill composite in posterior restorations after 4 years. METHODS A total of 174 posterior restorations were performed on 57 participants using a self-etch adhesive system and a bulk-fill composite. The groups were then divided into the following categories: 1) without surface sealant (NoS), 2) with surface sealant Biscover (Bisco, SBi), and 3) with surface sealant Permaseal (Ultradent, SPe). Restorations were evaluated using FDI criteria at baseline and after 1 and 4 years. Statistical analysis was conducted using Kaplan-Meier survival analysis and the Chi-square test (α = 0.05). RESULTS After 4 years, only one restoration was lost (1 in the NoS group). The fracture/retention rate (with 95% confidence interval) was 98% for NoS and 100% for both SBi and SPe (p = 0.76). The majority of secondary outcomes showed minor defects, with no significant differences among the groups (p > 0.05). However, significant differences were observed among the groups in terms of marginal staining and marginal adaptation (p = 0.03). In both items, twelve restorations (nine in NoS, one in SBi, and two in SPe) showed minor marginal discrepancies favoring the sealant groups (SBi and SPe). SIGNIFICANCE Regardless of the use of surface sealants, the bulk-fill composite restorations showed excellent clinical performance after 4 years. However, the groups that received sealants showed better marginal adaptation and less marginal discoloration compared to those that did not receive sealants.
Collapse
Affiliation(s)
- Fernanda Signorelli Calazans
- Department of Restorative Dentistry, School of Dentistry, Fluminense Federal University, Nova Friburgo, RJ, Brazil
| | | | - Romina Ñaupari-Villasante
- Department of Restorative Dentistry, School of Dentistry, Ponta Grossa State University, Ponta Grossa, PR, Brazil
| | - Rafael Pinto Mendonça
- Department of Restorative Dentistry, Institute of Science and Technology of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - Giulia Ornellas
- Department of Restorative Dentistry, School of Dentistry, Fluminense Federal University, Nova Friburgo, RJ, Brazil
| | - Elisa Gomes Albuquerque
- Operative Dentistry Department, School of Dentistry, Juiz de Fora Federal University, Juiz de Fora, MG, Brazil
| | - Chane Tardem
- Department of Restorative Dentistry, School of Dentistry, Fluminense Federal University, Nova Friburgo, RJ, Brazil
| | - Mauro Sayao de Miranda
- Restorative Dentistry Department, Rio de Janeiro State University, Rio de Janeiro, RJ, Brazil
| | - Marcos O Barceleiro
- Department of Restorative Dentistry, School of Dentistry, Fluminense Federal University, Nova Friburgo, RJ, Brazil.
| | - Alessandro D Loguercio
- Department of Restorative Dentistry, School of Dentistry, Ponta Grossa State University, Ponta Grossa, PR, Brazil
| |
Collapse
|
10
|
Baltacıoğlu İH, Demirel G, Kolsuz ME, Orhan K. The Effect of Gravity on Marginal Integrity of Different Flowable Bulk-Fill Resin Composites. MEDICINA (KAUNAS, LITHUANIA) 2024; 60:396. [PMID: 38541122 PMCID: PMC10971810 DOI: 10.3390/medicina60030396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 02/20/2024] [Accepted: 02/23/2024] [Indexed: 06/12/2024]
Abstract
Background and Objectives: The aim of this quantitative research was to investigate the effect of gravitational forces on the marginal integrity of different bulk-fill composites by micro-CT imaging. Materials and Methods: Fifty caries-free human third molars extracted for prophylactic purposes were used in this study. Each tooth was prepared with two proximal box cavities, with dimensions of 3 mm × 3 mm × 5 mm. Five distinct groups, each comprising 20 cavities, thus totaling 100 cavities for this study: (1, Group CON): Clearfil Majesty Flow + Clearfil Majesty Esthetic (as the control); (2, Group FBR): Filtek Bulk-fill Flowable Restorative + Clearfil Majesty Esthetic; (3, Group XTB): Voco Extrabase + Clearfil Majesty Esthetic; (4, Group SDR): SDR + Clearfil Majesty Esthetic; and (5, Group SNC): Sonicfill. When restoring the mesial cavities, the occlusal surfaces of the teeth in the mold were positioned upwards, counteracting the force of gravity. In contrast, for the restoration of the distal cavities, the occlusal surfaces were aligned downwards, to be parallel with the gravitational pull. After restorative procedures, each tooth was treated with 5000 thermal cycles. A solution of ammoniacal silver nitrate (AgNO3) was employed as a tracing agent. The micro-CT scans were conducted and the total volume of silver nitrate and the total volume of restorations within the relevant region of interest were calculated in "mm3" with software. Two-way ANOVA and Tukey tests were performed at a significance level of p = 0.05 with Graphpad Prism v 8.2.1 software. Results: Both gravity effect and interaction showed no statistical differences (p > 0.05). Statistically significant differences were observed in the restorative materials (p < 0.05). Conclusions: Gravitational forces do not emerge as a major factor affecting the marginal integrity of flowable bulk-fill composites in class II restorations. The chemical composition of the composites plays a more crucial role, with the XTB composite showing higher microleakage ratios compared to the others.
Collapse
Affiliation(s)
- İsmail Hakkı Baltacıoğlu
- Department of Restorative Dentistry, Faculty of Dentistry, Ankara University, 06560 Ankara, Turkey;
| | - Gülbike Demirel
- Department of Restorative Dentistry, Faculty of Dentistry, Ankara University, 06560 Ankara, Turkey;
| | - Mehmet Eray Kolsuz
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, 06560 Ankara, Turkey; (M.E.K.); (K.O.)
| | - Kaan Orhan
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, 06560 Ankara, Turkey; (M.E.K.); (K.O.)
- Department of Oral Diagnostics, Faculty of Dentistry, Semmelweis University, 1085 Budapest, Hungary
| |
Collapse
|
11
|
Baltacioğlu İH, Demirel G, Öztürk B, Aydin F, Orhan K. Marginal adaptation of bulk-fill resin composites with different viscosities in class II restorations: a micro-CT evaluation. BMC Oral Health 2024; 24:228. [PMID: 38350901 PMCID: PMC10863248 DOI: 10.1186/s12903-024-03975-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 02/02/2024] [Indexed: 02/15/2024] Open
Abstract
BACKGROUND The purpose of this study is to evaluate the marginal adaptation of bulk-fill resin composites with different viscosities (paste-like and flowable) in Class II restorations using micro-CT imaging. METHODS Forty extracted human molars were used. Mesial and distal Class II box cavities (approximately 3 mm x 3 mm x 4 mm) were prepared for each tooth, with cavity floors located 1 mm below the enamel-cementum junction. Following adhesive application, teeth were restored using eight different groups: Group XB: X-tra Base Bulk-fill Flowable (VOCO), Group XF: X-tra Fill Bulk-fill (VOCO), Group FB: Filtek Bulk-fill Posterior (3 M ESPE), Group FF: Filtek Bulk-fill Flowable (3 M ESPE), Group BB: Beautifil-Bulk (SHOFU), Group BF: Beautifil-Bulk Flowable (SHOFU), and Group CO: "as a control group", Clearfil Majesty Posterior (KURARAY) and Group CF: "as a control group", Clearfil Majesty Flow + Clearfil Majesty Posterior (KURARAY). The restored teeth underwent an aging protocol involving 1000 cycles in a water bath fluctuating between 5 ± 1.0 °C and 55 ± 1.0 °C. Post-aging, teeth were immersed in 50% silver nitrate solution for 24 h and then in a film developer solution for 8 h. Microleakage analysis was performed using micro-CT, evaluated with 3D Slicer software. A two-way ANOVA was employed for statistical analysis. RESULTS Two-way ANOVA results indicated significant effects of both viscosity (p < 0.0001) and composite type (p < 0.0001) on marginal adaptation. Viscosity analysis (comparing flowable and paste-like) revealed no significant differences in the FB-FF, XB-XF and BB-BF groups but significant differences in the and CO-CF group, with flowable type exhibiting less microleakage than paste-like type. CONCLUSIONS The study suggests that while the viscosity of bulk-fill composites did not significantly affect marginal adaptation, the brand of bulk-fill composite did influence it.
Collapse
Affiliation(s)
| | - Gülbike Demirel
- Department of Restorative Dentistry, Faculty of Dentistry, Ankara University, Ankara, Turkey.
| | - Burcu Öztürk
- Department of Restorative Dentistry, Faculty of Dentistry, Ankara University, Ankara, Turkey
| | - Fulya Aydin
- Department of Restorative Dentistry, Faculty of Dentistry, Ankara Medipol University, Ankara, Turkey
| | - Kaan Orhan
- Department of Maxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey
| |
Collapse
|
12
|
Abouelleil H, Attik N, Chiriac R, Toche F, Ory A, Zayakh A, Grosgogeat B, Pradelle-Plasse N. Comparative study of two bioactive dental materials. Dent Mater 2024; 40:297-306. [PMID: 38007319 DOI: 10.1016/j.dental.2023.11.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 10/05/2023] [Accepted: 11/14/2023] [Indexed: 11/27/2023]
Abstract
OBJECTIVES New bioactive materials were introduced to not only restore the lost dental hard tissue but also to release fluoride that inhibits demineralization and occurrence of secondary caries. The current study thus aims to assess Fluoride release as well as the mechanical and physical properties of two new commercially available bioactive restorative materials. METHODS Two materials, Cention® Forte (CF) (Ivoclar Vivadent), Surefil one™ (SO) (Denstply Sirona), were evaluated in terms of fracture toughness (FT), flexural strength (FS), flexural modulus (FM) (ISO 4049), compressive strength (CS), and Vickers hardness (VH). In addition, thermogravimetric analysis (TGA) was performed, as well as pH measurements and quantification of Fluoride release after immersion in distilled water at times of 0, 7, 14 and 21 days. The sealing ability was evaluated using silver nitrate dye penetration on natural teeth. Finally, Energy-Dispersive X-Ray Spectroscopy (EDX) was used to investigate the surface composition of the two studied material surfaces. The data were statistically analyzed using Independent T-Tests; the chosen significance level was α = 0.05. RESULTS CF had significantly higher FT values compared to SO (p = 0.001). Also the FS results showed that CF had significantly higher values (90.11 MPa), followed by SO (22.15 MPa). The CS values showed the same order with significantly higher values for CF (231.79 MPa). While the FM and VH showed the reverse order with SO having significantly higher values than CF. pH measurements showed that CF evolved towards significantly higher pH values after 3 weeks in distilled water, while thermal properties showed more stability and higher resistance to degradation for CF compared to SO. The silver nitrate penetration results showed significantly better sealing ability for CF compared to the self-adhesive SO. Finally, EDX surface analysis results were consistent with the release profiles and confirmed the composition of the two tested materials. SIGNIFICANCE Both materials, demonstrated enhanced Fluoride release ability, and hence good remineralisation potential in vitro that could prevent recurrent carious lesions in vivo. The composition based on acrylic polymerization showed better mechanical resistance to bending and fracture, and higher sealing ability than those based on acid base reaction.
Collapse
Affiliation(s)
- Hazem Abouelleil
- Univ Lyon, Université Claude Bernard Lyon 1, UMR CNRS 5615, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France; Univ Lyon, Université Claude Bernard Lyon 1, Faculté d'Odontologie, 69008 Lyon, France
| | - Nina Attik
- Univ Lyon, Université Claude Bernard Lyon 1, UMR CNRS 5615, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France; Univ Lyon, Université Claude Bernard Lyon 1, Faculté d'Odontologie, 69008 Lyon, France.
| | - Rodica Chiriac
- Univ Lyon, Université Claude Bernard Lyon 1, UMR CNRS 5615, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France
| | - Francois Toche
- Univ Lyon, Université Claude Bernard Lyon 1, UMR CNRS 5615, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France
| | - Anthony Ory
- Univ Paris, Faculté d'Odontologie, Hôpital Rothschild, Assistance Publique-Hôpitaux de Paris, France
| | - Assia Zayakh
- Hospices civils de Lyon, Service d'Odontologie, 69007 Lyon, France
| | - Brigitte Grosgogeat
- Univ Lyon, Université Claude Bernard Lyon 1, UMR CNRS 5615, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France; Univ Lyon, Université Claude Bernard Lyon 1, Faculté d'Odontologie, 69008 Lyon, France; Hospices civils de Lyon, Service d'Odontologie, 69007 Lyon, France
| | - Nelly Pradelle-Plasse
- Univ Lyon, Université Claude Bernard Lyon 1, UMR CNRS 5615, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France; Univ Paris, Faculté d'Odontologie, Hôpital Rothschild, Assistance Publique-Hôpitaux de Paris, France
| |
Collapse
|
13
|
Elhejazi AA, Alosimi A, Alarifi F, almuqayrin A. The effect of depth of cure on microhardness between bulk-fill and hybrid composite resin material. Saudi Dent J 2024; 36:381-385. [PMID: 38419988 PMCID: PMC10897616 DOI: 10.1016/j.sdentj.2024.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 03/02/2024] Open
Abstract
Background Functional properties should be considered when selecting composites for restorations. With bulk-fill resin composites, the disadvantages of conventional composites were overcome regarding the increments necessitating the application of a 2 mm thick layer of resin and the amount of polymerization. The most significant advantage of bulk-fill resin composite is the possibility of applying the material in 4 mm layers. Multiple studies have examined the polymerization, mechanical, and adhesive properties of bulk-fill resin composites and proven them successful. Objective This study aimed to compare the effect of the depth of cure on the microhardness between different bulk-fill composites and a hybrid composite material by following the manufacturer's instructions. Methods In this in vitro study, five composite types obtained from different companies were used: two high-viscosity bulk-fill composites, Filtek and OPUS bulk; two low-viscosity bulk-fill flowable composites, Any-com and OPUS flow; one light-cure hybrid composite, Cavex, totaling 25 samples. The composite was applied at a depth of 4 mm in the bulk-fill composite and 2 mm in the hybrid composite and light-cured. The microhardness was measured at three different times. The first time was performed immediately after light-curing, the second time was evaluated 24 h after polymerization, and the third time was after thermocycling. Result A total of 25 samples showed that the microhardness increased the first and second times and decreased the third time after thermocycling on the top and bottom sides of Filtek, OPUS bulk-fill, OPUS flow, and Any-com bulk. The Cavex microhardness at the bottom was equal at all three-time points. Two-way repeated measures ANOVA showed that the microhardness between all types of composite resin materials was significantly different at different times when p = 0.00.
Collapse
Affiliation(s)
- Ahmed A. Elhejazi
- Department of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Asim Alosimi
- College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Faisal Alarifi
- College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | | |
Collapse
|
14
|
Parra Gatica E, Duran Ojeda G, Wendler M. Contemporary flowable bulk-fill resin-based composites: a systematic review. Biomater Investig Dent 2023; 10:8-19. [PMID: 37138762 PMCID: PMC10150621 DOI: 10.1080/26415275.2023.2175685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023] Open
Abstract
Flowable bulk-fill resin-based composites (BF-RBCs) represent a new and interesting alternative for the bulk-fill restorative techniques in the posterior region. However, they comprise a heterogeneous group of materials, with important differences in composition and design. Therefore, the aim of the present systematic review was to compare the main properties of flowable BF-RBCs, including their composition, degree of monomer conversion (DC), polymerization shrinkage and shrinkage stress, as well as flexural strength. The search was conducted following PRISMA guidelines in the Medline (PubMed), Scopus and Web of Science databases. In vitro articles reporting on the DC, polymerization shrinkage/shrinkage stress, and flexural strength of flowable BF-RBCs strength were included. The QUIN risk-of-bias (RoB) tool was used for assessing the study quality. From initially 684 found articles, 53 were included. Values for DC ranged between 19.41 and 93.71%, whereas polymerization shrinkage varied between 1.26 and 10.45%. Polymerization shrinkage stresses reported by most studies ranged between 2 and 3 MPa. Flexural strength was above 80 MPa for most materials. A moderate RoB was observed in most studies. Flowable BF-RBCs meet the requirements to be indicated for bulk fill restoration technique in the posterior region. However, important variations among composition and properties hinder extrapolation of the results to materials different from those reported here. Clinical studies are urgently required to assess their performance under a real working scenario.
Collapse
Affiliation(s)
- Elizabeth Parra Gatica
- Master Program in Dental Sciences, Faculty of Dentistry, Universidad de Concepción, Concepción, Chile
| | | | - Michael Wendler
- Master Program in Dental Sciences, Faculty of Dentistry, Universidad de Concepción, Concepción, Chile
- Department of Restorative Dentistry, Faculty of Dentistry, Universidad de Concepción, Concepción, Chile
| |
Collapse
|
15
|
Loguercio AD, Ñaupari-Villasante R, Gutierrez MF, Gonzalez MI, Reis A, Heintze SD. 5-year clinical performance of posterior bulk-filled resin composite restorations: A double-blind randomized controlled trial. Dent Mater 2023; 39:1159-1168. [PMID: 37839995 DOI: 10.1016/j.dental.2023.10.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 09/07/2023] [Accepted: 10/08/2023] [Indexed: 10/17/2023]
Abstract
OBJECTIVES The aim of this double-blind, and randomized controlled clinical trial was to evaluate the 5-year clinical performance of posterior resin composite restorations placed with the incremental filling technique [IF] or the bulk-fill technique [BF]. Two different adhesive systems were used: etch-&-rinse (ER) or self-etch (SE). METHODS Posterior dental teeth of 72 participants (n = 236), with a cavity depth of at least 3 mm, were randomly divided into four groups. Restorations were applied with either Tetric N-Bond or Tetric N-Bond SE. The composite resin Tetric N-Ceram Bulk-Fill was placed either with IF or BF. Restorations were evaluated using FDI criteria at baseline and after 1, 2, 3, 4, and 5 years. Statistical analysis was performed using the Wilcoxon Signed rank test (a=0.05). RESULTS Two hundred and four restorations were evaluated after 5 years. Eleven restorations were considered 'failed', ten due to fracture (4 IF and 6 BF) and one due to secondary caries (IF). The annual failure rate was 1.2% for BF and 1% for IF (p = 0.35). When comparing BF and IF, no significant differences were found for any of the parameters evaluated (p > 0.05). Regarding the adhesive systems, 44 and 51 restorations showed minor problems in terms of marginal adaptation and staining, with significantly more marginal discoloration when the self-etch adhesive was used (p = 0.002). SIGNIFICANCE The bulk-fill restorative technique showed good clinical behavior compared to the incremental filling technique, especially when using an etch-&-rinse adhesive, after 5 years of clinical evaluation.
Collapse
Affiliation(s)
- Alessandro D Loguercio
- Department of Restorative Dentistry, School of Dentistry, Ponta Grossa State University, Ponta Grossa, PR, Brazil
| | - Romina Ñaupari-Villasante
- Department of Restorative Dentistry, School of Dentistry, Ponta Grossa State University, Ponta Grossa, PR, Brazil
| | - Mario F Gutierrez
- Universidad de los Andes, Chile, Facultad de Odontologia, Chile; University of Chile, Department of Restorative Dentistry, Faculty of Dentistry, Chile
| | | | - Alessandra Reis
- Department of Restorative Dentistry, School of Dentistry, Ponta Grossa State University, Ponta Grossa, PR, Brazil
| | | |
Collapse
|
16
|
Zhang X, Zhang J, Zhang T, Yao S, Wang Z, Zhou C, Wu J. Novel low-shrinkage dental resin containing microcapsules with antibacterial and self-healing properties. J Mech Behav Biomed Mater 2023; 148:106212. [PMID: 37913623 DOI: 10.1016/j.jmbbm.2023.106212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/23/2023] [Accepted: 10/25/2023] [Indexed: 11/03/2023]
Abstract
Dental resin restorations commonly fail because of fractures and secondary caries. The aim of this research was to synthesize a novel low-shrinkage dental resin with antibacterial and self-healing properties. The low-shrinkage dental resin was obtained by incorporating a 20 wt% anti-shrinkage mixture of an expanding monomer 3,9-diethyl-3,9-dimethylol -1,5,7,11-tetraoxaspiro[5,5] undecane and an epoxy resin monomer diallyl bisphenol A diglycidyl ether (1:1, referred as "UE") and different mass fractions of self-healing antibacterial microcapsules (0%, 2.5%, 5%, 7.5%, and 10%) were incorporated into the matrix to prepare multifunctional dental resin. Polymerization shrinkage, mechanical properties, antibacterial activity, self-healing ability, and cytotoxicity of this dental resin were evaluated. The polymerization volumetric shrinkage of resin containing 20 wt% UE and 7.5 wt% microcapsules was reduced by 30.12% (4.13% ± 0.42%) compared with control. Furthermore, it exhibited high antibacterial activity and a good self-healing efficiency of 71% without adversely affecting the mechanical property and cell viability. This novel multifunctional dental resin with low polymerization shrinkage and excellent antibacterial activity and self-healing capability has potential application as a dental resin material to decrease the incidence of fractures and secondary caries.
Collapse
Affiliation(s)
- Xiaoran Zhang
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, 250012, China
| | - Jiajia Zhang
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, 250012, China
| | - Ting Zhang
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, 250012, China
| | - Shuo Yao
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, 250012, China
| | - Zonghua Wang
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, 250012, China
| | - Chuanjian Zhou
- Research Institute of Polymer Materials, School of Materials Science and Engineering, Shandong University, Jinan, 250061, China
| | - Junling Wu
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, 250012, China.
| |
Collapse
|
17
|
Sedky RA, Chew HP, Nour KA, Abuelsadat SM, Elsherbini D, Fok ASL. Interfacial integrity of bulk-fill resin composite restorations in deep Class-II cavities. Dent Mater J 2023; 42:692-699. [PMID: 37612062 DOI: 10.4012/dmj.2022-241] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
This study evaluated the interfacial integrity of deep (6 mm) Class-II (OM/OD) restorations placed using different bulk-fill resin composites [Filtek™ Bulk Fill Flowable Restorative (BF) and Filtek™ Bulk Fill Posterior Restorative (BP) (3M ESPE, St. Paul, MN, USA)] of different increment thicknesses (2 or 4 mm). BP was used for capping in all cases, while Filtek™ Z250 Universal Restorative (3M ESPE) was used as the control material. Interfacial debonding was measured during curing through acoustic emission (AE), followed by image analysis using micro-computed tomography and scanning electron microscopy. Microhardness testing was also conducted to assess degree of conversion. Depth of cure was adequate in all restorations. Specimens with 4-mm thick first increment of BF, which had a higher shrinkage strain, produced most AE events and debonding. Thus, bulk filling of deep cavities using bulk-fill resin composites with a high shrinkage strain should be avoided.
Collapse
Affiliation(s)
| | - Hooi Pin Chew
- Minnesota Dental Research Center for Biomaterials and Biomechanics, School of Dentistry, University of Minnesota
| | - Khaled Aly Nour
- Department of Operative Dentistry, Faculty of Dentistry, Ain-Shams University
| | | | - Dina Elsherbini
- Minnesota Dental Research Center for Biomaterials and Biomechanics, School of Dentistry, University of Minnesota
| | - Alex Siu Lun Fok
- Minnesota Dental Research Center for Biomaterials and Biomechanics, School of Dentistry, University of Minnesota
| |
Collapse
|
18
|
Ghani SMA, Hassan MIA, Abdullah AH, Ghani ARA, Izra'ai SI, Aregawi W, Chew HP, Fok A. Linear and volumetric shrinkage displacements of resin composite restorations with and without debonding. Dent Mater J 2023; 42:659-668. [PMID: 37612060 DOI: 10.4012/dmj.2023-023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
The study aimed to compare shrinkage displacements of fully and partially bonded resin composite restorations (RCRs). Two groups (n=5) Class-I RCR evaluated: Group 1 (G1) fully bonded and Group 2 (G2) debonded at the floor. Experimental results were compared with predictions from simple theory and finite element analysis (FEA). The experimental linear surface displacement (LSD) was G1 62.5±5.2 µm and G2 32.8±4.0 µm. Theoretically-predicted LSD for G1 60.1±7.4 µm and G2 31.3±7.5 µm. FEA-predicted LSD were G1 65.2 µm and G2 34.6 µm. The experimental volumetric surface displacement (VSD) was G1 1.22±0.2 mm3 and G2 0.63±0.2 mm3. Theoretically-predicted VSD for G1 1.36±0.2 mm3 and G2 0.67±0.2 mm3. No significant difference (p>0.05) was found in LSD and VSD among the experimental, theoretical and FEA in the same group. Significant differences (p<0.05) were noted between the two groups, with LSD and VSD of G2 values being almost half of G1. This pattern gave an insight of a debond restoration characteristics.
Collapse
Affiliation(s)
- Siti Mariam Ab Ghani
- Center for Restorative Dentistry Studies, Faculty of Dentistry, Universiti Teknologi MARA
| | | | | | | | | | - Wondwosen Aregawi
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota
| | - Hooi Pin Chew
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota
| | - Alex Fok
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota
| |
Collapse
|
19
|
Dietschi D, Askari M, Rossier I, Caseiro L, Krejci I, Leprince JG, Di Bella E, Ardu S. Marginal Adaptation of In Vitro Class II Restorations Made Out of Bulk or Conventional Composite Using Single- or Multi-Layered Techniques. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6325. [PMID: 37763602 PMCID: PMC10533156 DOI: 10.3390/ma16186325] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/14/2023] [Accepted: 09/19/2023] [Indexed: 09/29/2023]
Abstract
Objective: Testing the influence of various restorative materials (conventional or bulkfill composites) and filling techniques (single- or multi-layered techniques) on the in vitro marginal adaptation of large class II direct composites with supra and sub-gingival margins subjected to thermomechanical loading (TML). Methods: A total of 40 prepared teeth were attributed randomly to five experimental groups. In Group 1, restorations were made of multi-layered high-viscosity conventional composite (Tetric EvoCeram); in Groups 2 and 3, restorations were made of a high viscosity bulkfill composite (Tetric EvoCeram Bulk Fill) applied in one (Group 2) or three layers (Group 3); in Groups 4 and 5, restorations were made of a flowable bulkfill composite (SDR flow) applied in one (Group 4) or two layers (Group 5), covered with a layer of high-viscosity conventional composite (Ceram-X Universal). A single adhesive (OptiBond FL) was used in all groups. All specimens were submitted to a staged TML comprising three phases (2 × 500,000 and 1,000,000 cycles) at 50 N with 3350 thermal cycles (5 to 55 °C) every 500,000 cycles. The tooth-restoration interfaces on proximal surfaces were evaluated quantitatively by scanning electron microscopy, before and after each TML phase, hence at three timepoints (T0, T1, T2 and T3). The following segments were considered for evaluation: proximal, vertical enamel margins (assessed individually on both restoration sides), cervical enamel (restoration side above CEJ) and cervical dentin margin (restoration side below the CEJ). Results: TML induced a significant reduction in continuous adaptation at both enamel and dentin margins in all groups, with percentages of continuous margins ranging from 75.2 to 91.8% at T0, and decreasing to values ranging from 21.3 to 73.9% at T3. Both composite systems and layering protocols had a significant influence on marginal adaptation of the restorations, with statistical associations depending on the restoration group and the timepoint considered. Defective margins in enamel were all of a cohesive nature with micro-fractures, while in dentin, interfacial gaps were the main defect observed. Conclusions/Clinical significance: The present results highlighted significant degradation of marginal adaption after long-term in vitro fatigue test using materials even with high-viscosity conventional resin composites, applied with a proper layering approach in medium-large sub-gingival cavities. While no significant differences were observed at the dentin cervical margins, there was a tendency for better adaptation at the enamel margin when using a higher modulus material with a multi-layered technique.
Collapse
Affiliation(s)
- Didier Dietschi
- Division of Cariology and Endodontology, Section of Dental Medicine, Faculty of Medicine, University of Geneva, 1205 Geneva, Switzerland; (D.D.); (M.A.); (I.R.); (L.C.); (I.K.); (J.G.L.)
| | - Mustafa Askari
- Division of Cariology and Endodontology, Section of Dental Medicine, Faculty of Medicine, University of Geneva, 1205 Geneva, Switzerland; (D.D.); (M.A.); (I.R.); (L.C.); (I.K.); (J.G.L.)
| | - Isaline Rossier
- Division of Cariology and Endodontology, Section of Dental Medicine, Faculty of Medicine, University of Geneva, 1205 Geneva, Switzerland; (D.D.); (M.A.); (I.R.); (L.C.); (I.K.); (J.G.L.)
| | - Luciana Caseiro
- Division of Cariology and Endodontology, Section of Dental Medicine, Faculty of Medicine, University of Geneva, 1205 Geneva, Switzerland; (D.D.); (M.A.); (I.R.); (L.C.); (I.K.); (J.G.L.)
| | - Ivo Krejci
- Division of Cariology and Endodontology, Section of Dental Medicine, Faculty of Medicine, University of Geneva, 1205 Geneva, Switzerland; (D.D.); (M.A.); (I.R.); (L.C.); (I.K.); (J.G.L.)
| | - Julian Gregoire Leprince
- Division of Cariology and Endodontology, Section of Dental Medicine, Faculty of Medicine, University of Geneva, 1205 Geneva, Switzerland; (D.D.); (M.A.); (I.R.); (L.C.); (I.K.); (J.G.L.)
| | - Enrico Di Bella
- Department of Political and International Studies, University of Genoa, 16126 Genoa, Italy;
| | - Stefano Ardu
- Division of Cariology and Endodontology, Section of Dental Medicine, Faculty of Medicine, University of Geneva, 1205 Geneva, Switzerland; (D.D.); (M.A.); (I.R.); (L.C.); (I.K.); (J.G.L.)
| |
Collapse
|
20
|
Effect of the Combination of Restorative Material and the Etching Protocol in Enamel Microleakage in Class II Cavities after Thermocycling. BIOMED RESEARCH INTERNATIONAL 2023; 2023:1354738. [PMID: 36820225 PMCID: PMC9938782 DOI: 10.1155/2023/1354738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 01/31/2023] [Accepted: 02/01/2023] [Indexed: 02/12/2023]
Abstract
This study is aimed at evaluating the marginal microleakage of bulk-fill class II restorations after thermocycling. Thirty-two human third molars received class II cavities prepared on mesial and distal faces. The cavities were bonded according to the adhesive protocol (total or self-etching). The cavities were then restored with composite and divided into 8 groups based on the composite combination: layering technique with Filtek Z350XT (G1 and G5), first layer with Filtek Z350 XT Flowable Restorative and then Filtek Z350XT (G2 and G6), bulk-fill technique with Filtek One Bulk Fill (G3 and G7), and first layer with Filtek One Bulk Fill Flow and Filtek Z350 XT (G4 and G8). The restorations were then subjected to thermocycling (2000 cycles, 5°C and 55°C, dwell time of 30 s). After aging, the restored teeth were immersed in methylene blue for 48 hours. The restorations (n = 32) were sectioned in the middle (two sections). The microleakage results were analyzed by two-way ANOVA followed by Tukey's post hoc test (α = 0.05). The groups did not differ statistically from each other in terms of marginal microleakage (p = 0.295). It can be concluded that there is no difference in the percentage of microleakage between conventional and bulk-fill resins on both consistencies, as well as there is also no statistically significant difference when the adhesive system is used in a conventional or self-etching mode.
Collapse
|
21
|
Correia AMDO, Jurema ALB, Bresciani E, Caneppele TMF. Effects of lesion size on the 30-month clinical performance of restorations with bulk fill and a regular nanofilled resin composite in noncarious cervical lesions. Clin Oral Investig 2023:10.1007/s00784-023-04914-6. [PMID: 36763143 DOI: 10.1007/s00784-023-04914-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 02/03/2023] [Indexed: 02/11/2023]
Abstract
OBJECTIVE The aim of this double-blind, randomized trial was to evaluate the influence of the occlusogingival distance (OGD) in noncarious cervical lesions (NCCLs) on the clinical performance of a regular bulk-fill resin composite and a regular nanofilled resin composite. MATERIALS AND METHODS One hundred and forty NCCLs in 77 participants were randomly divided into four groups (n = 35), according to OGD (1.5 mm ± 10% or 3 mm ± 10%) and resin composites (Filtek Bulk Fill Posterior [B] or Filtek Z350 XT [C]), namely: 1.5 mm-B, 1.5 mm-C, 3 mm-B, and 3 mm-C. The restorations were bonded using a two-step self-etch adhesive (Clearfil SE Bond), applied following the manufacturer's instructions. Restorations were polished 1 week after placement. Two experienced and calibrated examiners evaluated the restorations using modified US Public Health Service criteria at baseline (7 days) and after 6, 12, 18, 24, and 30 months. Statistical analyses were carried out using Kruskal-Wallis, Friedman's repeated measures analysis of variance, and the Wilcoxon signed rank test (α = 0.05). RESULTS After 30 months, the recall rate was 94.2%. Eight restorations were lost (3 for 1.5 mm-C, 2 for 1.5 mm-B, 1 for 3 mm-C, and 2 for 3 mm-B). All groups resulted in a significantly worse marginal discoloration and surface texture at 30 months in comparison with the baseline (1 week). No significant difference was found for the other parameters. CONCLUSION The restorations performed with both resin composites produced clinically acceptable restorations. The OGD of NCCLs did not influence the clinical performance of restorations. CLINICAL SIGNIFICANCE The OGD of NCCLs did not have a significant effect on the clinical performance of a regular bulk-fill and nanofilled restorations. Both materials showed a very good performance on 30-month evaluation.
Collapse
Affiliation(s)
- Ayla Macyelle de Oliveira Correia
- Department of Restorative Dentistry, Institute of Science and Technology, São Paulo State University - UNESP, Av. Francisco José Longo, 777, São José Dos Campos, São Paulo, 12245-000, Brazil
| | - Ana Luiza Barbosa Jurema
- Department of Restorative Dentistry, Institute of Science and Technology, São Paulo State University - UNESP, Av. Francisco José Longo, 777, São José Dos Campos, São Paulo, 12245-000, Brazil
| | - Eduardo Bresciani
- Department of Restorative Dentistry, Institute of Science and Technology, São Paulo State University - UNESP, Av. Francisco José Longo, 777, São José Dos Campos, São Paulo, 12245-000, Brazil
| | - Taciana Marco Ferraz Caneppele
- Department of Restorative Dentistry, Institute of Science and Technology, São Paulo State University - UNESP, Av. Francisco José Longo, 777, São José Dos Campos, São Paulo, 12245-000, Brazil.
| |
Collapse
|
22
|
Barišić ML, Sarajlija H, Klarić E, Knežević A, Sabol I, Pandurić V. Detection of Leachable Components from Conventional and Dental Bulk-Fill Resin Composites (High and Low Viscosity) Using Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) Method. Polymers (Basel) 2023; 15:polym15030627. [PMID: 36771928 PMCID: PMC9921113 DOI: 10.3390/polym15030627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 01/08/2023] [Accepted: 01/22/2023] [Indexed: 01/27/2023] Open
Abstract
The aim of this study was to investigate leachable components (monomers) in high and low viscosity dental bulk-fill resin composites and conventional resin composite materials after polymerization. Six bulk-fill and six conventional dental resin composite materials were used in this study. The samples of each material (three sets of triplicates) were cured for 20 s with irradiance of 1200 mW/cm2 with a LED curing unit and immersed in a 75% ethanol solution at 37 °C. The eluates from each triplicate set were analyzed after 24 h, 7 days or 28 days using liquid chromatography coupled with triple quadrupole tandem mass spectrometry (LC-MS/MS). Detectable amounts of 2-Hydroxyethyl methacrylate (HEMA) were found in both Gradia materials and the amount observed across different time points was statistically different (p ˂ 0.05), with the amount in solution increasing for Gradia and decreasing for Gradia Direct flo. Bisphenol A diglycidildimethacrylate (BIS GMA) was found in Filtek and Tetric materials. Triethylene glycol dimethacrylate (TEGDMA) was detected in all materials. On the other hand, there were no statistically significant differences in the amounts of TEGDMA detected across different time points in either of the tested materials. Monomers HEMA, TEGDMA, 4-dimethylaminobenzoic acid ethyl ester (DMA BEE) and BIS GMA in bulk-fill and conventional composites (high and low viscosity) can be eluted after polymerization. The good selection of composite material and proper handling, the following of the manufacturer's instructions for polymerization and the use of finishing and polishing procedures may reduce the elution of the unpolymerized monomers> responsible for the possible allergic and genotoxic potential of dental resin composites.
Collapse
Affiliation(s)
| | | | - Eva Klarić
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine University of Zagreb, 10000 Zagreb, Croatia
- Correspondence: (E.K.); (V.P.)
| | - Alena Knežević
- Division of Restorative Sciences, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, CA 90089, USA
| | - Ivan Sabol
- Division of Molecular Medicine, Ruđer Boskovic Institute, 10000 Zagreb, Croatia
| | - Vlatko Pandurić
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine University of Zagreb, 10000 Zagreb, Croatia
- Correspondence: (E.K.); (V.P.)
| |
Collapse
|
23
|
Comparing nanoleakage between class II bulkfill and incremental composite restorations using snowplow technique. Saudi Dent J 2023; 35:46-52. [PMID: 36817023 PMCID: PMC9931506 DOI: 10.1016/j.sdentj.2022.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 12/13/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
Purpose To compare the nanoleakage between bulkfill and incremental-fill resin composites in class II slot preparations for primary and permanent teeth restored by the snowplow technique. Materials and Methods Class II slots were prepared in 32 M (16 exfoliated/extracted primary and 16 permanent molars). Optibond All-InOne self-etching adhesive was applied and cured. A flowable composite, Premise, was then injected into the gingival seat without curing using the snowplow technique. Cavities were restored using Sonicfill/bulkfill or microhybrid Herculite composites. Energy dispersive X-ray spectrometry was used to assess nanoleakage as silver deposition percentages along the axial and cervical walls. Multivariate analysis of variance was used to assess the effect of tooth type (primary and permanent teeth) and placement technique (bulkfill and incremental techniques) on nanoleakage at the axial and cervical walls. Results Bulkfill restorations had significantly greater nanoleakage than incremental restorations at the cervical walls in primary and permanent molars (mean = 1.21 vs 0.49 in primary molars and 0.76 vs 0.24 in permanent molars). Equivalent results were observed at the axial walls of the restorations (mean = 0.66 vs 0.14 in primary molars and 0.28 vs 0.08 in permanent molars, with a P value of<0.001). Conclusions Less nanoleakage was observed in class II slot/snowplow resin-composite restorations using the incremental technique compared to bulkfill in both dentitions. However, greater nanoleakage was detected on the cervical walls when compared with the axial walls.
Collapse
|
24
|
Benati MRDL, Baioni JC, Souza AGCD, Ferraz LN, Oliveira ALBMD, Vitti RP, Scatolin RS. Bond strength of bulk fill composite to teeth prepared with Er. BRAZILIAN JOURNAL OF ORAL SCIENCES 2022. [DOI: 10.20396/bjos.v22i00.8668727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Aim: The present in vitro study aimed to evaluate the bond strength of a bulk fill composite on dentin surfaces prepared with the Er: YAG laser. Methods: Twenty-four permanent third molars were selected and divided into 2 groups: CP - Conventional preparation with high-speed handpiece (control) and LA (laser) - Preparation with Er: YAG laser. The occlusal surface was removed to expose coronal dentin, which was subsequently prepared with a high-speed handpiece or Er: YAG laser (350mJ, 4Hz, 1.5 ml/min water flow). Both groups were restored with Filtek One Bulk Fill (3M ESPE) composite resin. After 24 hours, the samples were evaluated for microtensile bond strength (μTBS), fracture pattern, and scanning electron microscopy (SEM). Results: The data obtained in the μTBS test were submitted to t-test (α=0.05). The results showed no difference in μTBS when the different types of cavity preparation were compared (ρ=0.091). Fracture patterns revealed the prevalence of cohesive fracture in composite resin in CP (83.3%) and adhesive fracture in LA (92.1%). In the SEM analysis, the LA group demonstrated the presence of gaps between the composite resin and the irradiated dentin surface. The hybrid layer exhibited more regularity with the presence of longer and uniform resin tags in the CP group. Conclusion: The type of cavity preparation did not influence the values of bulk fill composite resin μTBS to dentin. Fracture patterns and scanning electron microscopy analyses suggested less interference at the adhesive interface in preparations performed using CP.
Collapse
|
25
|
Kim YS, Baek SH, Kim RJY. Effect of vibration during bulk and incremental filling on adaptation of a bulk-fill composite resin. Sci Rep 2022; 12:21652. [PMID: 36522452 PMCID: PMC9755266 DOI: 10.1038/s41598-022-26197-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
This study evaluated the effect of vibration on adaptation of bulk-fill composite resin. A scanning laser doppler vibrometer measured the frequency and amplitude of a vibratory device (COMO; B&L Biotech) used for resin placement and visualized its effect on the resin according to depth. A bulk-fill composite resin (Filtek Bulk Fill; 3M ESPE) was placed in simulated cavities (4 mm diameter, 4 mm depth) by different layering methods (incremental filling with two 2-mm-thick layers vs. bulk filling with a single 4-mm-thick layer). The groups were further divided based on the application of vibration during restoration (no vibration vs. vibration). In addition to the surface void area at the cavity floor, the overall void volume and the void volumes of the bottom, middle, and top thirds were obtained for micro-computed tomography analysis. The frequency and amplitude of the COMO were approximately 149 Hz and between 26 and 51 µm, respectively. When vibration was not applied, incremental filling had a lower void volume in the bottom third of the cavity than did bulk filling (p < 0.05). Vibration applied with a 4-mm-thick bulk fill had no significant effect on the adaptation of composite resin (p > 0.05). In contrast, vibration reduced the amount of void formation in the bottom third of the cavity during incremental filling (p < 0.05). Application of vibration to resin with a 2-mm incremental-layering technique formed a smaller void at the interface between the cavity and resin and within the bulk-fill composite resin.
Collapse
Affiliation(s)
- Yung-Soo Kim
- grid.31501.360000 0004 0470 5905School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Seung-Ho Baek
- grid.31501.360000 0004 0470 5905Department of Conservative Dentistry, Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Ryan Jin Young Kim
- grid.31501.360000 0004 0470 5905Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| |
Collapse
|
26
|
López-Ruiz M, Navas F, Fernández-García P, Martínez-Erro S, Fuentes MV, Giráldez I, Ceballos L, Ferrer-Luque CM, Ruiz-Linares M, Morales V, Sanz R, García-Muñoz RA. L-arginine-containing mesoporous silica nanoparticles embedded in dental adhesive (Arg@MSN@DAdh) for targeting cariogenic bacteria. J Nanobiotechnology 2022; 20:502. [PMID: 36457046 PMCID: PMC9714087 DOI: 10.1186/s12951-022-01714-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 11/16/2022] [Indexed: 12/03/2022] Open
Abstract
Dental caries is the major biofilm-mediated oral disease in the world. The main treatment to restore caries lesions consists of the use of adhesive resin composites due to their good properties. However, the progressive degradation of the adhesive in the medium term makes possible the proliferation of cariogenic bacteria allowing secondary caries to emerge. In this study, a dental adhesive incorporating a drug delivery system based on L-arginine-containing mesoporous silica nanoparticles (MSNs) was used to release this essential amino acid as a source of basicity to neutralize the harmful acidic conditions that mediate the development of dental secondary caries. The in vitro and bacterial culture experiments proved that L-arginine was released in a sustained way from MSNs and diffused out from the dental adhesive, effectively contributing to the reduction of the bacterial strains Streptococcus mutans and Lactobacillus casei. Furthermore, the mechanical and bonding properties of the dental adhesive did not change significantly after the incorporation of L-arginine-containing MSNs. These results are yielding glimmers of promise for the cost-effective prevention of secondary caries.
Collapse
Affiliation(s)
- Marta López-Ruiz
- grid.28479.300000 0001 2206 5938Faculty of Health Sciences, IDIBO Research Group, Rey Juan Carlos University, Madrid, Spain
| | - Francisco Navas
- grid.28479.300000 0001 2206 5938Department of Chemical and Environmental Technology, Rey Juan Carlos University, C/ Tulipán S/N Móstoles, 28933 Madrid, Spain
| | - Paloma Fernández-García
- grid.28479.300000 0001 2206 5938Department of Chemical and Environmental Technology, Rey Juan Carlos University, C/ Tulipán S/N Móstoles, 28933 Madrid, Spain
| | - Samuel Martínez-Erro
- grid.28479.300000 0001 2206 5938Department of Chemical and Environmental Technology, Rey Juan Carlos University, C/ Tulipán S/N Móstoles, 28933 Madrid, Spain
| | - Mª Victoria Fuentes
- grid.28479.300000 0001 2206 5938Faculty of Health Sciences, IDIBO Research Group, Rey Juan Carlos University, Madrid, Spain
| | - Isabel Giráldez
- grid.28479.300000 0001 2206 5938Faculty of Health Sciences, IDIBO Research Group, Rey Juan Carlos University, Madrid, Spain
| | - Laura Ceballos
- grid.28479.300000 0001 2206 5938Faculty of Health Sciences, IDIBO Research Group, Rey Juan Carlos University, Madrid, Spain
| | - Carmen Mª Ferrer-Luque
- grid.4489.10000000121678994Department of Stomatology, School of Dentistry, University of Granada, Campus de Cartuja, Colegio Máximo S/N, 18071 Granada, Spain
| | - Matilde Ruiz-Linares
- grid.4489.10000000121678994Department of Stomatology, School of Dentistry, University of Granada, Campus de Cartuja, Colegio Máximo S/N, 18071 Granada, Spain
| | - Victoria Morales
- grid.28479.300000 0001 2206 5938Department of Chemical and Environmental Technology, Rey Juan Carlos University, C/ Tulipán S/N Móstoles, 28933 Madrid, Spain
| | - Raúl Sanz
- grid.28479.300000 0001 2206 5938Department of Chemical and Environmental Technology, Rey Juan Carlos University, C/ Tulipán S/N Móstoles, 28933 Madrid, Spain
| | - Rafael A. García-Muñoz
- grid.28479.300000 0001 2206 5938Department of Chemical and Environmental Technology, Rey Juan Carlos University, C/ Tulipán S/N Móstoles, 28933 Madrid, Spain
| |
Collapse
|
27
|
Niem T, Frankenberger R, Amend S, Wöstmann B, Krämer N. Damping Behaviour and Mechanical Properties of Restorative Materials for Primary Teeth. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7698. [PMID: 36363290 PMCID: PMC9656603 DOI: 10.3390/ma15217698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/30/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
The energy dissipation capacity and damping ability of restorative materials used to restore deciduous teeth were assessed compared to common mechanical properties. Mechanical properties (flexural strength, modulus of elasticity, modulus of toughness) for Compoglass F, Dyract eXtra, SDR flow, Tetric Evo Ceram, Tetric Evo Ceram Bulk Fill, and Venus Diamond were determined using a 4-point bending test. Vickers hardness and Martens hardness, together with its plastic index (ηITdis), were recorded using instrumented indentation testing. Leeb hardness (HLD) and its deduced energy dissipation data (HLDdis) were likewise determined. The reliability of materials was assessed using Weibull analysis. For common mechanical properties, Venus Diamond always exhibited the significantly highest results and SDR flow the lowest, except for flexural strength. Independently determined damping parameters (modulus of toughness, HLDdis, ηITdis) invariably disclosed the highest values for SDR flow. Composite materials, including SDR flow, showed markedly higher reliabilities (Weibull modulus) than Compoglass F and Dyract eXtra. SDR flow showed pronounced energy dissipation and damping characteristics, making it the most promising material for a biomimetic restoration of viscoelastic dentin structures in deciduous teeth. Future developments in composite technology should implement improved resin structures that facilitate damping effects in artificial restorative materials.
Collapse
Affiliation(s)
- Thomas Niem
- Department of Prosthodontics, Medical Center for Dentistry, Justus Liebig University Giessen and University Hospital Giessen and Marburg, Campus Giessen, Schlangenzahl 14, 35392 Giessen, Germany
| | - Roland Frankenberger
- Department of Operative Dentistry, Endodontics and Pediatric Dentistry, Medical Center for Dentistry, University of Marburg and University Hospital Giessen and Marburg, Campus Marburg, Georg Voigt Strasse 3, 35039 Marburg, Germany
| | - Stefanie Amend
- Department of Paediatric Dentistry, Medical Centre for Dentistry, Justus Liebig University Giessen and University Hospital Giessen and Marburg, Campus Giessen, Schlangenzahl 14, 35392 Giessen, Germany
| | - Bernd Wöstmann
- Department of Prosthodontics, Medical Center for Dentistry, Justus Liebig University Giessen and University Hospital Giessen and Marburg, Campus Giessen, Schlangenzahl 14, 35392 Giessen, Germany
| | - Norbert Krämer
- Department of Paediatric Dentistry, Medical Centre for Dentistry, Justus Liebig University Giessen and University Hospital Giessen and Marburg, Campus Giessen, Schlangenzahl 14, 35392 Giessen, Germany
| |
Collapse
|
28
|
Zhang X, Ma X, Liao M, Liu F, Wei Q, Shi Z, Mai S, He J. Properties of Bis-GMA free bulk-filled resin composite based on high refractive index monomer Bis-EFMA. J Mech Behav Biomed Mater 2022; 134:105372. [DOI: 10.1016/j.jmbbm.2022.105372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/10/2022] [Accepted: 07/14/2022] [Indexed: 12/01/2022]
|
29
|
Khoramian Tusi S, Hamdollahpoor H, Mohammadi Savadroodbari M, Sheikh Fathollahi M. Comparison of polymerization shrinkage of a new bulk-fill flowable composite with other composites: An in vitro study. Clin Exp Dent Res 2022; 8:1605-1613. [PMID: 36062844 PMCID: PMC9760135 DOI: 10.1002/cre2.656] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 08/12/2022] [Accepted: 08/16/2022] [Indexed: 01/26/2023] Open
Abstract
OBJECTIVE Since composites still face a critical problem called polymerization shrinkage and bulk-fill composites have reported acceptable results for this issue, this study aims to assess the polymerization shrinkage of a new bulk-fill flowable composite (G-aenial bulk injectable [GBI]) and compare it to other bulk-fill and conventional composites. MATERIALS AND METHODS In this in vitro study, 25 composite discs were fabricated using three bulk-fill and two conventional composites. They were bonded to a microscopic slide and were covered by a coverslip. This assembly was transferred to a linear variable differential transformer and composite samples were cured from underneath the slides. Dimensional changes formed in composite samples were recorded. Data were analyzed using analysis of variance followed by post hoc Tukey's and Dunnett's tests. RESULTS The groups were significantly different regarding polymerization shrinkage. G-aenial bulk injectable and G-aenial universal flo showed significantly higher polymerization shrinkage than other composites at 30, 60, and 1800 s after light irradiation, while X-tra fil and Filtek Z250 showed the lowest polymerization shrinkage at the aforementioned time points. CONCLUSION According to the results, the new composite had polymerization shrinkage similar to the conventional one. Bulk-fill composites reported similar or lower shrinkage to conventional composites.
Collapse
|
30
|
Fracture Resistance and Microleakage around Direct Restorations in High C-Factor Cavities. Polymers (Basel) 2022; 14:polym14173463. [PMID: 36080538 PMCID: PMC9460406 DOI: 10.3390/polym14173463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/20/2022] [Accepted: 08/21/2022] [Indexed: 11/29/2022] Open
Abstract
The aim of this research was to evaluate the mechanical impact of different direct restorations in terms of fracture resistance, and subsequent fracture pattern, in occlusal high C-factor cavities. Furthermore, the adaptation of different direct restorations in the form of gap formation was also evaluated. Seventy-two intact mandibular molars were collected and randomly distributed into three groups (n = 24). Class I occlusal cavities with standardized dimensions were prepared in all specimens. After adhesive treatment, the cavities were restored with direct restorations utilizing three different materials. Group 1: layered conventional packable resin composite (Filtek Ultimate), Group 2: bulk-fill resin composite (SDR), Group 3: bulk-fill short fibre-reinforced composite (SFRC; everX Posterior) covered with packable composite occlusally. Half of the restored specimens underwent static load-to fracture testing (n = 12/group), while the rest underwent sectioning and staining for microleakage evaluation and gap formation analysis. Fracture patterns were evaluated visually among the mechanically tested specimens. The layered composite restoration (Group 1) showed significantly lower fracture resistance compared to the bulk fill groups (Group 2, p = 0.005, Group 3, p = 0.008), while there was no difference in fracture resistance between the other groups. In terms of gap formation values, the layered composite restoration (Group 1) produced significantly higher gap formation compared to the bulk-fill groups (Group 2, p = 0.000, Group 3, p = 0.000). Regarding the fracture pattern, SFRC (Group 3) produced the highest number, while SDR (Group 2) produced the lowest number of repairable fractures. The use of bulk-fill resin composite (fibre or non-fibre-reinforced) for occlusal direct restorations in high C-factor cavities showed promising achievements regarding both fracture resistance and microleakage. Furthermore, the use of short fibre-reinforced bulk-fill composite can also improve the fracture pattern of the restoration-tooth unit. Bulk-fill materials provide a simple and effective solution for restoring and reinforcing high C-factor occlusal cavities.
Collapse
|
31
|
David C, Cuevas-Suárez CE, de Cardoso GC, Isolan CP, de Moraes RR, da Rosa W, Münchow EA, da Silva AF. Characterization of Contemporary Conventional, Bulk-fill, and Self-adhesive Resin Composite Materials. Oper Dent 2022; 47:392-402. [PMID: 35917238 DOI: 10.2341/21-063-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/06/2021] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To evaluate the physical and biological properties of different types of flowable resin composites and their bonding ability to dentin, comparing the performance of self-adhesive and bulk-fill materials with a conventional control. METHODS AND MATERIALS Four flowable resin composites were tested: two self-adhesive (Y-flow [SA_YF]; and Dyad Flow [SA_DF]); one bulk-fill (Filtek Bulk Fill Flow [BF]); and one conventional composite (Opallis Flow [OF]). The microshear bond strength (μSBS) to dentin (bovine samples) was investigated at 24 hours and 6 months of storage. The materials were also characterized by degree of conversion, cross-link density, water contact angle, color stability, and cell viability (ISO 10993-5/2009) analyses. Data were analyzed using Analysis of Variance and Tukey tests (α=0.05). RESULTS The μSBS values were higher for control specimens at 24 hours, whereas the resin-dentin bonds were similarly distributed among the groups after aging. Adhesive failure was the most frequent pattern observed at both time intervals. SA_YF was the only material that increased the bond strength over time. Degree of conversion increased in the following order: SA_YF (28.6±1.4%) < BF (49.7±0.8%) < OF (60.0±2.0%) = SA_DF (63.6±2.3%). Cross-link density was similar among all materials. The self-adhesive composites were more hydrophilic than the other types, with BF showing the lowest water contact angle and the greatest color alteration. All resin composites had a biocompatible behavior. CONCLUSION Chemical composition appeared to be an influential factor affecting the physicomechanical and biological behavior of the materials tested.
Collapse
Affiliation(s)
- C David
- Carla David, Biopathological Research Group, Faculty of Dentistry (GIBFO), University of the Andes Mérida, Mda, Venezuela; Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil
| | - C E Cuevas-Suárez
- Carlos Enrique Cuevas-Suárez, Dental Materials Laboratory, Academic Area of Dentistry, Autonomous University of Hidalgo State, Pachuca, Hgo, Mexico
| | - G C de Cardoso
- Gabriela Cardoso de Cardoso, Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil
| | - C P Isolan
- Cristina Pereira Isolan, Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil
| | - R R de Moraes
- Rafael Ratto de Moraes, Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Wlo da Rosa
- Wellington Luiz Oliveira da Rosa, Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil
| | - E A Münchow
- Eliseu A Münchow, Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, POA, RS, Brazil
| | - A F da Silva
- *Adriana Fernandes da Silva, Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil
| |
Collapse
|
32
|
Evaluation of Shear Bond Strength of Resin-Based Composites to Biodentine with Three Types of Seventh-Generation Bonding Agents: An In Vitro Study. Int J Dent 2022; 2022:2830299. [PMID: 35942229 PMCID: PMC9356874 DOI: 10.1155/2022/2830299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 06/14/2022] [Accepted: 07/05/2022] [Indexed: 11/18/2022] Open
Abstract
Background and Aim. Biodentine refers to a bioactive material commonly applied for dental restoration in clinical practice, but poor adhesion of the Biodentine to the restorative materials could affect the quality and long-term integrity of the final restoration. The study aimed to assess shear bond strength (SBS) of two resin-based composites to Biodentine using three commercially available 7th generation bonding agents. Methods. Forty-eight acrylic blocks having central holes with a nominal diameter of 4 mm and a depth of 2 mm were prepared. The holes of the acrylic blocks were filled with Biodentine, which was prepared following the guidelines provided by the manufacturer. Then, the specimens were divided into six groups (n = 8). Groups 1, 2, and 3, Tetric N-Ceram composite bonded to Biodentine with Tetric N-bond, Xeno V+, Bond Force bond, respectively. Group 4, 5, and 6, Filtek Z350 bonded to Biodentine with the same three adhesives. The specimens were placed in distilled water for 24 hours and tested for the SBS in a universal testing machine at a crosshead speed of 1 mm/min. The test data were listed in a table and independent samples t-test and analysis of variance (ANOVA) were conducted as a part of the statistical analysis. Results. The Tetric N bonding agent achieved the highest SBS followed by Bond Force, and Xeno V and highly significant difference was found. On the other hand, an overall increase in the SBS values of the Tetric N-Ceram resin was noticed in comparison with the Filtek Z350 and the differences was statistically significant. Although the specimens failed in adhesive, cohesive and mixed fracture modes but the cohesive was found to be the dominant failure mode in all groups. Conclusion. Among the tested bonding agents and resin composites, the Tetric N-Ceram composite bonded by Tetric N-bond self-etch adhesive with the Biodentine showed the highest SBS compared to the other combinations.
Collapse
|
33
|
Oh HJ, Lee CH, Lee IB. Real-time measurement of transmittance changes during photo-polymerization of conventional and bulk-fill composites. Dent Mater J 2022; 41:800-807. [PMID: 35858790 DOI: 10.4012/dmj.2022-009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study investigated transmittance changes during photo-polymerization of composites in real-time. The transmittance changes of one conventional micro-hybrid, three conventional nano-hybrid, and four bulk-fill composites were measured before, during, and after photo-polymerization, and the maximum rate of transmittance change was compared with that of polymerization shrinkage. A significant difference in transmittance of composite between before and after photo-polymerization was observed. The transmittance of composites except for one bulk-fill composite increased during photo-polymerization. There was a correlation between the maximum rate of transmittance change and the maximum rate of polymerization shrinkage. The transmittance analysis of composites gives very important information to know for the final aesthetic restoration and allows to evaluate polymerization kinetics.
Collapse
Affiliation(s)
- Hyun-Jin Oh
- Department of Conservative Dentistry and Dental Research Institute, School of Dentistry, Seoul National University
| | - Chang-Ha Lee
- Department of Conservative Dentistry and Dental Research Institute, School of Dentistry, Seoul National University
| | - In-Bog Lee
- Department of Conservative Dentistry and Dental Research Institute, School of Dentistry, Seoul National University
| |
Collapse
|
34
|
Oliveira AA, Ribeiro MLP, Costa PVM, Pereira RD, Versluis A, Veríssimo C. The effect of filling technique on the cuspal strain, polymerization shrinkage stress, enamel crack formation and depth of cure of restored molars. Dent Mater 2022; 38:1404-1418. [PMID: 35787894 DOI: 10.1016/j.dental.2022.06.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 06/10/2022] [Accepted: 06/22/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Evaluate the effect of different restorative filling techniques on the residual shrinkage stress (ShrS), cuspal strain (CS), depth of cure (DC), and enamel crack formation (Ec) in molars with MOD restorations. METHODS Post-gel shrinkage, elastic modulus, compressive and diametral tensile strength of the Filtek One Bulk Fill composite were calculated. Sixty molars with MOD preparations were restored using four filling techniques: Bulk; Horizontal; Oblique; Natural enamel and dentin substitution (NEDS) technique. CS was measured using a strain gauge (n = 10). The DC (n = 5) was measured using Knoop hardness. Shrinkage stress/strain was analyzed using 3D finite element analysis. The Ec analysis was carried out by transillumination. Two-way ANOVA with repeated measures and Tukey's HSD test (α = 0.05) was performed for the CS data. Two-Way ANOVA and Tukey's HSD test was performed for the DC data (α = 0.05). RESULTS CS was higher at the lingual cusp for the horizontal and NEDS technique. No statistical difference was found between the buccal and lingual CS values for the Bulk (p = 0.367) or Oblique techniques (p = 0.192). CS values were lower for the Bulk. More enamel cracks were found for the Bulk. DC was lower at 4 mm regardless the filling technique. The Horizontal showed the highest ShrS values. The Bulk generated the lower ShrS values. SIGNIFICANCE A Bulk technique caused the lowest shrinkage stress/strain. An Oblique technique yielded the best balance between stress, strain and crack formation. NEDS technique is a good alternative to decrease the number of increments while maintaining the stress levels nearby the Oblique technique.
Collapse
Affiliation(s)
- A A Oliveira
- School of Dentistry, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - M L P Ribeiro
- School of Dentistry, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - P V M Costa
- School of Dentistry, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - R D Pereira
- School of Dentistry, Faculdades de Ciências Odontológicas, FCO, Montes Claros, MG, Brazil
| | - A Versluis
- Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center - UTHSC, Memphis, TN, USA
| | - C Veríssimo
- School of Dentistry, Federal University of Goiás, Goiânia, Goiás, Brazil.
| |
Collapse
|
35
|
Lopes-Rocha L, Hernandez C, Gonçalves V, Pinho T, Tiritan ME. Analytical Methods for Determination of BPA Released from Dental Resin Composites and Related Materials: A Systematic Review. Crit Rev Anal Chem 2022; 54:653-668. [PMID: 35776702 DOI: 10.1080/10408347.2022.2093097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Knowing the impacts of bisphenol A (BPA) on human health, this systematic review aimed to gather the analytical methods for the quantification of BPA release of BPA in dental materials in in vitro and in vivo (biological fluids) studies. A brief critical discussion of the impacts of BPA on human health and the possible association with BPA in dental materials was also presented. The research was carried out by three independent researchers, (according to PRISMA guidelines) in PUBMED and SCOPUS databases, by searching for specific keywords and articles published between January 2011 and February 2022. Seventeen articles met the eligibility criteria and were included in this systematic review: 10 in vitro and 7 in vivo. In in vitro studies, the highest amounts of BPA released were from flowable to conventional resins, followed by resin-modified glass ionomer. In contrast, the smallest amount was released from "BPA-free" composites and CAD-CAM blocks. Regarding in vivo studies, a higher concentration of BPA were found in saliva than urine or blood. The best analytical method for trace quantifying BPA is LC-MS/MS (Liquid Chromatography with Tandem Mass Spectrometry) due to its selectivity, low quantification limits, and the unequivocal identification. However, further studies are required to develop faster and more sensitive methods, in order to obtain more reliable results.
Collapse
Affiliation(s)
- Lígia Lopes-Rocha
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, Gandra, Portugal
| | - Clara Hernandez
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, Gandra, Portugal
| | - Virgínia Gonçalves
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, Gandra, Portugal
- TOXRUN-Toxicology Research Unit, University Institute of Health Sciences (IUCS), CESPU, Gandra, Portugal
| | - Teresa Pinho
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, Gandra, Portugal
- IBMC-Institute of Molecular and Cellular Biology, i3S-Institute of Innovation and Research in Health, Oporto University, Porto, Portugal
| | - Maria Elizabeth Tiritan
- TOXRUN-Toxicology Research Unit, University Institute of Health Sciences (IUCS), CESPU, Gandra, Portugal
- Faculty of Pharmacy, University of Porto (FFUP), Portugal. Interdisciplinary Center of Marine and Environmental Research (CIIMAR), University of Porto, Edifício do Terminal de Cruzeiros do Porto de Leixões, Matosinhos, Portugal
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia da, Universidade do Porto, Porto, Portugal
| |
Collapse
|
36
|
Harp YS, Montaser MA, Zaghloul NM. Flowable fiber-reinforced versus flowable bulk-fill resin composites: Degree of conversion and microtensile bond strength to dentin in high C-factor cavities. J ESTHET RESTOR DENT 2022; 34:699-706. [PMID: 35274436 DOI: 10.1111/jerd.12901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 02/28/2022] [Accepted: 03/01/2022] [Indexed: 11/27/2022]
Abstract
OBJECTIVES To compare flowable fiber-reinforced and flowable bulk-fill resin composites regarding their degree of conversion (DC) and microtensile bond strength (μTBS) to dentin in high C-factor class I cavities. MATERIALS AND METHODS One flowable fiber-reinforced (EverX Flow, GC) and two flowable bulk-fill composites (SDR, Dentsply, and Tetric N-flow Bulk fill, Ivoclar Vivadent) were tested. Regarding DC, 10 cylindrical-shaped specimens were prepared from each material (N = 30), measured using Fourier-Transform Infrared Spectroscopy (FTIR). Regarding µ TBS , class I cavities (4.5 × 4.5 × 3) were prepared on flat dentin surfaces of 30 molars, divided into three equal groups, restored with the three restorative materials, thermocycled, sectioned to create 1 mm × 1 mm cross-sectional beams, then tested using a universal testing machine. Failure mode was assessed using a stereomicroscope. Two-way ANOVA and Tukey's HSD post-hoc tests were used in DC, while One-way ANOVA was used for µ TBS . RESULTS The used materials showed statistically significant differences in DC with the fiber-reinforced composite having the highest value. No statistically significant differences were found between the materials regarding their µ TBS . CONCLUSIONS Flowable fiber-reinforced composite provided the most DC performance compared to the flowable bulk-fill composites. The three used restorative materials provided comparable bonding ability to dentin in high C-factor cavities. CLINICAL SIGNIFICANCE Flowable fiber-reinforced resin composite is preferred as a dentin-replacement material in high-stress bearing areas. However, both flowable fiber-reinforced and bulk-fill resin composites are equally effective in bonding to dentin in high C-factor cavities.
Collapse
Affiliation(s)
- Youniss Saleh Harp
- Department of Operative Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Marmar Ahmed Montaser
- Department of Operative Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Nadia Mohamed Zaghloul
- Department of Operative Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| |
Collapse
|
37
|
Crystalline properties and morphology of bulk-fill dental resin composites as function of light-cure protocol and composition. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04163-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
38
|
da Costa Vieira LCG, Campos AR, Senna PM, Reis Perez CD. X-ray microtomography analysis of gaps and voids in the restoration of non-carious cervical lesions with different composite resins. Indian J Dent Res 2022; 33:85-89. [PMID: 35946251 DOI: 10.4103/ijdr.ijdr_770_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Context (Background) Resin composites are the most widely used material for restoring cervical defects. However, the high failure rate of these restorations is still a concern. Aims The aim of this in vitro study was to evaluate, using microtomography (μCT), the interfacial gap and voids formation in Class V cavities in premolars restored with materials with lower polymerization shrinkage combined with different restorative techniques. Settings and Design Cervical defects were created in 30 intact premolar and were randomly distributed to be restored by one of the following techniques (n = 6): Composite resin with two increments (CR), organic modified polymer (ORMOCER) with single (OR1) or two increments (OR2, or low viscosity bulk-fill composite resin with single (BF1) or two increments (BF2). Methods and Material Each tooth was scanned before filling to determine the volume of interest (VOI) to be applied in the second μCT after restoration and to control the cavity volume among the groups. In the μCT after filling, the volume of interfacial gaps and voids was calculated for each group. Statistical Analysis The groups were compared using one-way and Tukey HSD post hoc test (α = 0.05). Results It was possible to identify higher gap formation in the OR1 group and higher void formation in CR group (P < 0.05). OR2 group showed better results than the group with one increment. BF2 showed the best filling capacity. Conclusions It was possible to conclude that the material and the number of increments directly influenced the internal adaptation and voids formation of Class V restorations.
Collapse
Affiliation(s)
| | - Adriano Rocha Campos
- Department of Prosthesis, School of Dentistry of State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Plinio Mendes Senna
- Department of Prosthesis, School of Dentistry of State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Cesar Dos Reis Perez
- Department of Prosthesis, School of Dentistry of State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| |
Collapse
|
39
|
ESTIMATION OF FRACTURE RESISTANCE OF NANOCOMPOSITE FILLING MATERIALS USING ACOUSTIC EMISSION METHOD. WORLD OF MEDICINE AND BIOLOGY 2022. [DOI: 10.26724/2079-8334-2022-4-82-112-117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
40
|
Ugurlu M, Sari F. A 3-year retrospective study of clinical durability of bulk-filled resin composite restorations. Restor Dent Endod 2022; 47:e5. [PMID: 35284329 PMCID: PMC8891466 DOI: 10.5395/rde.2022.47.e5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 07/07/2021] [Accepted: 07/18/2021] [Indexed: 11/11/2022] Open
Affiliation(s)
- Muhittin Ugurlu
- Department of Restorative Dentistry, Faculty of Dentistry, Süleyman Demirel University, Isparta, Turkey
| | - Fatmanur Sari
- Department of Restorative Dentistry, Faculty of Dentistry, Süleyman Demirel University, Isparta, Turkey
| |
Collapse
|
41
|
Prathima BJ, Karale R, Prashanth BR, Shivaranjan NS, Jain N. The effect of bulk-fill composites: Activa and Smart Dentin Replacement on cuspal deflection in endodontically treated teeth with different access cavity designs. J Conserv Dent 2022; 25:375-379. [PMID: 36187866 PMCID: PMC9520647 DOI: 10.4103/jcd.jcd_53_22] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/14/2022] [Indexed: 11/20/2022] Open
Abstract
Aim: The aim was to evaluate the effect of bulk-fill composites – Activa and Smart Dentin Replacement (SDR) on cuspal deflection in endodontically treated teeth with different access cavity designs. Materials and Methods: Forty-two maxillary first premolar teeth were randomly divided into three experimental groups based on different access designs as Group I – conservative endodontic cavities (CECs), Group II – traditional endodontic cavities, and Group III – CECs with diverging walls and two subgroups, based on the different access cavity restorations subgroup A-Activa and subgroup B-SDR with n = 7 per group. Root canal treatment was completed under the dental operating microscope. Cuspal deflection was assessed by measuring the distance between the glass beads using an optical microscope and micrometer immediately after a Root canal treatment and final measurements after access restorations. Data were statistically analyzed and tabulated. Results: Results showed that the access cavity restored with Activa showed the highest cuspal deflection than SDR in all the groups (P < 0.05). Conservative access designs showed the least cuspal deflection among other groups. Conclusion: CEC designs showed lesser cuspal deflection than traditional endodontic cavity designs. SDR can be considered as a choice of material for access restorations.
Collapse
|
42
|
LEE CH, LEE IB. Effect of radiant emittance of an LED curing light on the cuspal deflection of a simulated tooth cavity in bulk-fill composite restoration: A novel simulation method. Dent Mater J 2022; 41:923-929. [DOI: 10.4012/dmj.2022-113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Chang-Ha LEE
- Department of Conservative Dentistry and Dental Research Institute, School of Dentistry, Seoul National University
| | - In-Bog LEE
- Department of Conservative Dentistry and Dental Research Institute, School of Dentistry, Seoul National University
| |
Collapse
|
43
|
Fraga MAA, Correr-Sobrinho L, Sinhoreti MAC, Carletti TM, Correr AB. Do dual-cure bulk-fill resin composites reduce gaps and improve depth of cure. Braz Dent J 2021; 32:77-86. [PMID: 34877980 DOI: 10.1590/0103-6440202104497] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 09/13/2021] [Indexed: 11/22/2022] Open
Abstract
This in vitro study aimed to evaluate the gaps length and depth of cure of dual-cure bulk-fill resin composites inserted in box-shaped preparations. Box-shaped preparations (4 mm deep) were made in fifteen human third-molars and divided into three groups according to the resin composites (n=5): Dual-cure bulk-fill BulkEZ (BEZ); Dual-cure bulk-fill HyperFIL (HF); and Tetric Evoceram Bulk-fill (TETRIC), as control. Gaps length (%) was evaluated in tooth-restoration interface with micro-computed tomography (µCT). The restorations were sectioned, and the degree of conversion (DC) and Knoop microhardness were evaluated at five depths (0.3, 1, 2, 3, and 4 mm). Microhardness data were statistically evaluated using absolute values (KHN) and relative values (microhardness percentages in relation to top). Gaps length (%) increased in the following order: BEZ=TETRIC<HF. The microhardness percentages in relation to top significantly decreased from 2 mm for TETRIC and 3 mm for HF. BEZ had constant microhardness and DC at all depths, while HF and TETRIC presented a significant decrease on DC at 4 mm. Dual-cure bulk-fill composites did not reduce gaps compared to light-cure bulk-fill, but they can improve depth of cure of bulk-filled restorations.
Collapse
Affiliation(s)
- May Anny Alves Fraga
- University of Campinas- Piracicaba Dental School, Department of Restorative Dentistry, Dental Materials Division
| | - Lourenço Correr-Sobrinho
- University of Campinas- Piracicaba Dental School, Department of Restorative Dentistry, Dental Materials Division
| | | | - Talita Malini Carletti
- University of Campinas- Piracicaba Dental School, Department of Restorative Dentistry, Dental Materials Division
| | - Américo Bortolazzo Correr
- University of Campinas- Piracicaba Dental School, Department of Restorative Dentistry, Dental Materials Division
| |
Collapse
|
44
|
Santin DC, Velo MMDAC, Camim FDS, Brondino NCM, Honório HM, Mondelli RFL. Effect of thickness on shrinkage stress and bottom-to-top hardness ratio of conventional and bulk-fill composites. Eur J Oral Sci 2021; 129:e12825. [PMID: 34865270 DOI: 10.1111/eos.12825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 07/28/2021] [Indexed: 10/19/2022]
Abstract
This study evaluated the effect of the material thickness on shrinkage stress and bottom-to-top hardness ratio of conventional and bulk-fill composites. Six commercial composites were selected based on their different technologies: Two conventional (C1, C2), two high-viscosity bulk-fill (HVB1, HVB2), and two low-viscosity bulk-fill (LVB1, LVB2). Shrinkage stress was analyzed for five specimens with 2 mm thickness (C-factor 0.75 and volume 24 mm3 ) and five specimens with 4 mm thickness (C-factor 0.375 and volume 48 mm3 ) for 300 s in a universal testing machine. Bottom-to-top hardness ratio values were obtained from Knoop microhardness measurements in specimens with 2- and 4-mm thickness (n = 5). Thickness increase resulted in significantly higher shrinkage stress for all materials with the exception of HVB2 and LVB1. C1, C2, HVB2, and LVB1 showed lower bottom-to-top hardness ratios at 4 mm than at 2 mm. Only LVB2 presented a bottom-to-top hardness ratio lower than 80% at 2 mm, while HVB1 surpassed this threshold at 4 mm of depth. The results suggest that the increase of composite thickness affected the shrinkage stress values. Also, thickness increase resulted in lower bottom-to-top hardness ratio. HVB1 showed better behavior than other bulk-fill materials, with low stress and adequate bottom-to-top hardness ratio at 4 mm thickness.
Collapse
Affiliation(s)
- Daniella Cristo Santin
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo-USP, Bauru, SP, Brazil
| | | | - Francielly da Silva Camim
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo-USP, Bauru, SP, Brazil
| | | | - Heitor Marques Honório
- Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo-USP, Bauru, SP, Brazil
| | - Rafael Francisco Lia Mondelli
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo-USP, Bauru, SP, Brazil
| |
Collapse
|
45
|
Polymerization shrinkage and shrinkage stress of bulk-fill and non-bulk-fill resin-based composites. J Dent Sci 2021; 17:1212-1216. [PMID: 35784133 PMCID: PMC9237169 DOI: 10.1016/j.jds.2021.12.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 12/03/2021] [Indexed: 11/22/2022] Open
|
46
|
Battancs E, Fráter M, Sáry T, Gál E, Braunitzer G, Szabó P. B, Garoushi S. Fracture Behavior and Integrity of Different Direct Restorative Materials to Restore Noncarious Cervical Lesions. Polymers (Basel) 2021; 13:polym13234170. [PMID: 34883673 PMCID: PMC8659675 DOI: 10.3390/polym13234170] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 11/25/2021] [Accepted: 11/28/2021] [Indexed: 01/09/2023] Open
Abstract
The purpose of this study was to analyze the fracture resistance and marginal leakage of noncarious cervical lesion (NCCL) restorations made of different restorative materials. Eighty upper premolars were randomly divided into four groups (n = 20/group). Standardized NCCL cavity preparations were performed on the buccal surface of the teeth and then restored with four different materials. Group 1: Packable resin composite (PC); Group 2: Highly flowable resin composite (HF); Group 3: Low flowable resin composite (LF); Group 4: Resin modified glass ionomer cement (RMGIC). After restorations were completed, cyclic and static fracture behavior was evaluated using a loading testing machine. Extra restored teeth were sectioned and then stained (n = 5/group). The specimens were viewed under a stereo microscope and the percentage of microgaps at the tooth–restoration interface was calculated. All restored teeth survived after fatigue loading. There was no statistically significant (p > 0.05) difference between the tested restorations after the static loading test. NCCLs restored with highly filled flowable composite showed the least microleakage among the tested groups (p < 0.05). The investigated restorative materials are acceptable for NCCL restorations in terms of fracture resistance and microleakage.
Collapse
Affiliation(s)
- Emese Battancs
- Department of Operative and Esthetic Dentistry, Faculty of Dentistry, University of Szeged, H-6720 Szeged, Hungary; (E.B.); (T.S.); (E.G.)
| | - Márk Fráter
- Department of Operative and Esthetic Dentistry, Faculty of Dentistry, University of Szeged, H-6720 Szeged, Hungary; (E.B.); (T.S.); (E.G.)
- Correspondence:
| | - Tekla Sáry
- Department of Operative and Esthetic Dentistry, Faculty of Dentistry, University of Szeged, H-6720 Szeged, Hungary; (E.B.); (T.S.); (E.G.)
| | - Emese Gál
- Department of Operative and Esthetic Dentistry, Faculty of Dentistry, University of Szeged, H-6720 Szeged, Hungary; (E.B.); (T.S.); (E.G.)
| | | | - Balázs Szabó P.
- Department of Food Engineering, Faculty of Engineering, University of Szeged, H-6725 Szeged, Hungary;
| | - Sufyan Garoushi
- Department of Biomaterials Science and Turku Clinical Biomaterials Center—TCBC, Institute of Dentistry, University of Turku, FI-20520 Turku, Finland;
| |
Collapse
|
47
|
Ritthiti A, Sattabanasuk V, Karunratanakul K, Senawongse P. Effect of Stress Generated by Occlusal Cyclic Force on Class I Bulk-Fill Composite Restoration Microleakage. Eur J Dent 2021; 16:307-314. [PMID: 34674197 PMCID: PMC9339919 DOI: 10.1055/s-0041-1735433] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Objective
This study aimed to evaluate the effects of different types and restorative techniques of Class I composite restorations with a single loading force on stress distribution and cyclic loading force on microleakage formation.
Materials and Methods
Class I cavities were prepared in premolars with 4 mm depth and divided into six groups of different restorations with: (1) Filtek Z250; (2) a 3-mm-thick layer of Filtek Bulk Fill Flowable Restoration and covered with Z250; (3) a 1.5-mm-thick layer of flowable composite and covered with Z250; (4) lining all cavity with flowable composite and restored with Z250; (5) Filtek Bulk Fill Posterior Restoration; and (6) lining all cavity with flowable composite and restored with bulk-fill composite. The specimens with and without cyclic occlusal loading were subjected to microleakage observation. In addition, six different models of Class I restorations corresponding to the microleakage study were generated. Finite element analysis (FEA) was used to identify the stress distribution under a single loading force.
Statistical Analysis
Data were statistically analyzed by two-way analysis of variance and multiple comparison. The significance level set at 0.05.
Results
Cavity lining or restoration with flowable composite underneath conventional composite reduced stress on composite resin based on FEA (groups 2 and 3). The cyclic stress on composite increased microleakage. Restoration with flowable composite underneath conventional composite reduced the microleakage in Class I restoration (groups 2, 3, and 4).
Conclusion
The most effective cavity lining with a flowable composite underneath conventional composite restoration was stress reduction under loading force resulting in microleakage reduction.
Collapse
Affiliation(s)
- Apirat Ritthiti
- Department of Conservative Dentistry, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
| | - Vanthana Sattabanasuk
- Department of Operative Dentistry and Endodontic, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Kawin Karunratanakul
- Biomedical Engineering Research Unit, National Metal and Materials Technology Center, Bangkok, Thailand
| | - Pisol Senawongse
- Department of Operative Dentistry and Endodontic, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| |
Collapse
|
48
|
Peng X, Zhang J, Stachurski ZH, Banaszak Holl MM, Xiao P. Visible-Light-Sensitive Triazine-Coated Silica Nanoparticles: A Dual Role Approach to Polymer Nanocomposite Materials with Enhanced Properties. ACS APPLIED MATERIALS & INTERFACES 2021; 13:46033-46042. [PMID: 34530612 DOI: 10.1021/acsami.1c15420] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nanocomposite materials are of great interest because of their superior properties. Besides the traditional synthesis methods that require high temperatures or toxic solvents, photopolymerization technology provides a simple, low-cost, and environmentally friendly route in preparing nanocomposites. In this research, the preparation of blue-light-sensitive triazine derivative-coated silica nanoparticles is presented. The resulting triazine-coated silica nanoparticles can play a dual role, i.e., acting as both photoinitiators to trigger photopolymerization reactions under the irradiation of LED@410 nm and fillers to endow the produced photopolymer nanocomposite materials with enhanced properties. Specifically, the triazine-coated silica nanoparticles can successfully induce free radical polymerization of trimethylolpropane triacrylate efficiently under the irradiation of LED@410 nm and demonstrate comparable photoinitiation ability to the triazine derivative-based photoinitiator. The effects of different loading amounts of triazine-coated silica nanoparticles toward the photopolymerization kinetics are also evaluated. By coating with the triazine derivative, the nanoparticles show good dispersion in the polymer matrix and significantly reduce the shrinkage of the samples during the photopolymerization. Moreover, the photocured nanocomposites exhibit enhanced migration stability and mechanical properties when an optimal amount of triazine-coated silica nanoparticles is added in the formulation.
Collapse
Affiliation(s)
- Xiaotong Peng
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Jing Zhang
- Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Zbigniew H Stachurski
- Research School of Engineering, Australian National University, Canberra, ACT 2601, Australia
| | - Mark M Banaszak Holl
- Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Pu Xiao
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| |
Collapse
|
49
|
Miura D, Ishida Y, Shinya A. Polymerization Shrinkage of Short Fiber Reinforced Dental Composite Using a Confocal Laser Analysis. Polymers (Basel) 2021; 13:polym13183088. [PMID: 34577989 PMCID: PMC8468671 DOI: 10.3390/polym13183088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/03/2021] [Accepted: 09/09/2021] [Indexed: 11/16/2022] Open
Abstract
The purpose of this study was to investigate the polymerization shrinkage of short fiber reinforced composite (SFRC) using a multicolor confocal displacement laser that can measure the polymerization shrinkage with high accuracy. The three types of SFRCs used in this study were XD (Ever X Flow Dentin), XB (Ever X Flow Bulk), and XP (EverX Posterior). In addition, CF (Clearfil majesty ES Flow) with hybrid type filler was used as a control. The measured values of the final polymerization shrinkage rate and amount of polymerization shrinkage rate when the polymerization shrinkage rate became constant (less than 0.1 µm/s) were approximated for all SFRCs. XP had a large aspect ratio of glass fiber filler and showed a significant difference from XD with a small aspect ratio (p < 0.05). There was no significant difference in the measured value of time when the polymerization contraction reached a constant speed (0.1 µm/s or less) for all SFRCs (p > 0.05). There was no significant difference in the measured values of polymerization shrinkage rate after the polymerization shrinkage reached a constant rate for all SFRCs (p > 0.05). These results show that glass fiber with large aspect ratio can alleviate polymerization shrinkage stress. The polymerization behavior of SFRC was found to be dependent on the amount of glass fiber filler, aspect ratio, and orientation.
Collapse
Affiliation(s)
- Daisuke Miura
- Department of Dental Materials Science, School of Life Dentistry at Tokyo, The Nippon Dental University, 1-9-20, Fujimi, Chiyoda-ku, Tokyo 102-8159, Japan; (D.M.); (Y.I.)
| | - Yoshiki Ishida
- Department of Dental Materials Science, School of Life Dentistry at Tokyo, The Nippon Dental University, 1-9-20, Fujimi, Chiyoda-ku, Tokyo 102-8159, Japan; (D.M.); (Y.I.)
| | - Akikazu Shinya
- Department of Dental Materials Science, School of Life Dentistry at Tokyo, The Nippon Dental University, 1-9-20, Fujimi, Chiyoda-ku, Tokyo 102-8159, Japan; (D.M.); (Y.I.)
- Turku Biomaterials Research Program, Department of Biomaterials Science, Institute of Dentistry and BioCity, University of Turku, Lemmikäisenkatu 2, 20520 Turku, Finland
- Correspondence: ; Tel.: +81-3-3261-8697
| |
Collapse
|
50
|
Ciavoi G, Mărgărit R, Todor L, Bodnar D, Dina MN, Tărlungeanu DI, Cojocaru D, Farcaşiu C, Andrei OC. Base Materials' Influence on Fracture Resistance of Molars with MOD Cavities. MATERIALS 2021; 14:ma14185242. [PMID: 34576466 PMCID: PMC8471061 DOI: 10.3390/ma14185242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/03/2021] [Accepted: 09/09/2021] [Indexed: 11/16/2022]
Abstract
The aim of this study was to compare fracture resistance of teeth presenting medium-sized mesial-occlusal-distal (MOD) cavities using different base materials. Thirty-six extracted molars were immersed for 48 h in saline solution (0.1% thymol at 4 °C) and divided into six groups. In group A, the molars were untouched, and in group B, cavities were prepared, but not filled. In group C, we used zinc polycarboxylate cement, in group D—conventional glass ionomer cement, in group E—resin modified glass ionomer cement, and in group F—flow composite. Fracture resistance was tested using a universal loading machine (Lloyd Instruments) with a maximum force of 5 kN and a crosshead speed of 1.0 mm/min; we used NEXYGEN Data Analysis Software and ANOVA Method (p < 0.05). The smallest load that determined the sample failure was 2780 N for Group A, 865 N for Group B, 1210 N for Group C, 1340 N for Group D, 1630 N for Group E and 1742 N for Group F. The highest loads were 3050 N (A), 1040 N (B), 1430 N (C), 1500 N (D), 1790 N (E), and 3320 N (F), the mean values being 2902 ± 114 N (A), 972 ± 65 N (B), 1339 ± 84 N (C), 1415 ± 67 N (D), 1712 ± 62 N (E), and 2334 ± 662 N (F). A p = 0.000195 shows a statistically significant difference between groups C, D, E and F. For medium sized mesial-occlusal-distal (MOD) cavities, the best base material regarding fracture resistance was flow composite, followed by glass ionomer modified with resin, conventional glass ionomer cement and zinc polycarboxylate cement. It can be concluded that light-cured base materials are a better option for the analyzed use case, one of the possible reasons being their compatibility with the final restoration material, also light-cured.
Collapse
Affiliation(s)
- Gabriela Ciavoi
- Department of Dental Medicine, Faculty of Medicine and Pharmacy, University of Oradea, 10 1st December Square, 410068 Oradea, Romania;
| | - Ruxandra Mărgărit
- Department of Restorative Odontotherapy, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, 37 Dionisie Lupu Str., 020021 Bucharest, Romania; (R.M.); (D.B.)
| | - Liana Todor
- Department of Dental Medicine, Faculty of Medicine and Pharmacy, University of Oradea, 10 1st December Square, 410068 Oradea, Romania;
- Correspondence: (L.T.); (D.I.T.)
| | - Dana Bodnar
- Department of Restorative Odontotherapy, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, 37 Dionisie Lupu Str., 020021 Bucharest, Romania; (R.M.); (D.B.)
| | - Magdalena Natalia Dina
- Department of Dental Techniques, Faculty of Midwifery and Nursing, Carol Davila University of Medicine and Pharmacy, 37 Dionisie Lupu Str., 020021 Bucharest, Romania;
| | - Daniela Ioana Tărlungeanu
- Department of Removable Prosthodontics, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, 37 Dionisie Lupu Str., 020021 Bucharest, Romania;
- Correspondence: (L.T.); (D.I.T.)
| | | | - Cătălina Farcaşiu
- Faculty of Dentistry, Department of Pedodontics, Carol Davila University of Medicine and Pharmacy, 37 Dionisie Lupu Str., 020021 Bucharest, Romania;
| | - Oana Cella Andrei
- Department of Removable Prosthodontics, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, 37 Dionisie Lupu Str., 020021 Bucharest, Romania;
| |
Collapse
|