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Pilecco RO, da Rosa LS, Baldi A, Machry RV, Tribst JPM, Valandro LF, Kleverlaan CJ, Scotti N, Pereira GKR. How do different intraoral scanners and milling machines affect the fit and fatigue behavior of lithium disilicate and resin composite endocrowns? J Mech Behav Biomed Mater 2024; 155:106557. [PMID: 38657286 DOI: 10.1016/j.jmbbm.2024.106557] [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: 02/27/2024] [Revised: 04/03/2024] [Accepted: 04/17/2024] [Indexed: 04/26/2024]
Abstract
The aim of this in vitro study was to evaluate the effect of the combinations of two different intraoral scanners (IOS), two milling machines, and two restorative materials on the marginal/internal fit and fatigue behavior of endocrowns produced by CAD-CAM. Eight groups (n= 10) were considered through the combination of TRIOS 3 (TR) or Primescan (PS) IOS; 4-axes (CR; CEREC MC XL) or 5-axes (PM; PrograMill PM7) milling machines; and lithium disilicate (LD; IPS e.max CAD) or resin composite (RC; Tetric CAD) restorative materials. Specific surface treatments were applied to each material, and the bonding to its corresponding Endocrown-shaped fiberglass-reinforced epoxy resin preparations was performed (Variolink Esthetic DC). Computed microtomography (μCT) was performed to assess the marginal/internal fit, as well as a mechanical fatigue test (20 Hz, initial load = 100 N/5000 cycles; step-size = 50 N/10,000 cycles until a threshold of 1500 N, then, the step-size was increased if needed to 100 N/10,000 cycles until failure or a threshold of 2800 N) to evaluate the restorations long-term behavior. Complementary analysis of the fracture features and surface topography in scanning electron microscopy was performed. Three-way ANOVA and Kaplan-Meier test (α = 0.05) were performed for marginal/internal fit, and fatigue behavior data, respectively. PS scanner, CR milling machine, and RC endocrowns resulted in a better marginal fit compared to their counterparts. Still, the PM machine resulted in a better pulpal space fit compared to the CR milling machine. Regardless of the scanner and milling machine, RC endocrowns exhibited superior fatigue behavior than LD ones. LD endocrowns presented margin chipping regardless of the milling machine used. Despite minor differences in terms of fit, the 'IOS' and 'milling machine' factors did not impair the fatigue behavior of endocrowns. Resin-composite restorations resulted in a higher survival rate compared to glass-ceramic ones, independently of the digital devices used in the workflow.
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Affiliation(s)
- Rafaela Oliveira Pilecco
- Post-Graduate Program in Oral Sciences (Prosthodontics Units), Faculty of Dentistry, Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | - Lucas Saldanha da Rosa
- Post-Graduate Program in Oral Sciences (Prosthodontics Units), Faculty of Dentistry, Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | - Andrea Baldi
- Department of Surgical Sciences, Dental School, University of Turin (UNITO), Turin, Piedmont, Italy.
| | - Renan Vaz Machry
- Post-Graduate Program in Oral Sciences (Prosthodontics Units), Faculty of Dentistry, Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | - João Paulo Mendes Tribst
- Department of Reconstructive Oral Care, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, North Holland, the Netherlands.
| | - Luiz Felipe Valandro
- Post-Graduate Program in Oral Sciences (Prosthodontics Units), Faculty of Dentistry, Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | - Cornelis Johannes Kleverlaan
- Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, North Holland, the Netherlands.
| | - Nicola Scotti
- Department of Surgical Sciences, Dental School, University of Turin (UNITO), Turin, Piedmont, Italy.
| | - Gabriel Kalil Rocha Pereira
- Post-Graduate Program in Oral Sciences (Prosthodontics Units), Faculty of Dentistry, Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
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Choi H, Jo JY, Hong MH. Marginal fit of three different nanocomposite inlays fabricated with computer-aided design/computer-aided manufacturing (CAD/CAM) technology: a comparative study. JOURNAL OF YEUNGNAM MEDICAL SCIENCE 2024; 41:80-85. [PMID: 38247035 DOI: 10.12701/jyms.2023.00934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 11/24/2023] [Indexed: 01/23/2024]
Abstract
BACKGROUND This study aimed to compare and evaluate the marginal fit of nanocomposite computer-aided design/computer-aided manufacturing (CAD/CAM) inlays. Three types of nanocomposite CAD/CAM blocks (HASEM, VITA Enamic, and Lava Ultimate) were used as materials. METHODS Class II disto-occlusal inlay restorations were prepared on a typodont mandibular right first molar using diamond rotary instruments. The inlays were fabricated using CAD/CAM technology and evaluated using the silicone replica technique to measure marginal gaps at five locations on each inlay. The data were analyzed by two-way analysis of variance and Tukey post hoc tests ( α=0.05). RESULTS There were no significant differences in the marginal gaps based on the type of nanocomposite CAD/CAM inlay used (p=0.209). However, there was a significant difference in the marginal gaps between the measurement regions. The gingival region consistently exhibited a larger marginal gap than the axial and occlusal regions (p<0.001). CONCLUSION Within the limitations of this in vitro study, the measurement location significantly influenced the marginal fit of class II disto-occlusal inlay restorations. However, there were no significant differences in the marginal gaps among the different types of CAD/CAM blocks. Furthermore, the overall mean marginal fits of the class II disto-occlusal inlay restorations made with the three types of nanocomposite CAD/CAM blocks were within the clinically acceptable range.
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Affiliation(s)
- Hyunsuk Choi
- Department of Dentistry and Prosthodontics, Catholic University of Daegu School of Medicine, Daegu, Korea
| | - Jae-Young Jo
- Department of Dentistry and Prosthodontics, Catholic University of Daegu School of Medicine, Daegu, Korea
| | - Min-Ho Hong
- Department of Dental Laboratory Science, College of Health Sciences, Catholic University of Pusan, Busan, Korea
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Vargas-Corral FG, Vargas-Corral AE, Rodríguez-Valverde MA, Bravo M, Rosales-Leal JI. Clinical comparison of marginal fit of ceramic inlays between digital and conventional impressions. J Adv Prosthodont 2024; 16:57-65. [PMID: 38455677 PMCID: PMC10917630 DOI: 10.4047/jap.2024.16.1.57] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 01/23/2024] [Accepted: 02/06/2024] [Indexed: 03/09/2024] Open
Abstract
PURPOSE The aim of this stuldy was to compare the clinical marginal fit of CAD-CAM inlays obtained from intraoral digital impression or addition silicone impression techniques. MATERIALS AND METHODS The study included 31 inlays for prosthodontics purposes of 31 patients: 15 based on intraoral digital impressions (DI group); and 16 based on a conventional impression technique (CI group). Inlays included occlusal and a non-occlusal surface. Inlays were milled in ceramic. The inlay-teeth interface was replicated by placing each inlay in its corresponding uncemented clinical preparation and taking interface impressions with silicone material from occlusal and free surfaces. Interface analysis was made using white light confocal microscopy (WLCM) (scanning area: 694 × 510 µm2) from the impression samples. The gap size and the inlay overextension were measured from the microscopy topographies. For analytical purposes (i.e., 95-%-confidence intervals calculations and P-value calculations), the procedure REGRESS in SUDAAN was used to account for clustering (i.e., multiple measurements). For p-value calculation, the log transformation of the dependent variables was used to normalize the distributions. RESULTS Marginal fit values for occlusal and free surfaces were affected by the type of impression. There were no differences between surfaces (occlusal vs. free). Gap obtained for DI group was 164 ± 84 µm and that for CI group was 209 ± 104 µm, and there were statistical differences between them (p = .041). Mean overextension values were 60 ± 59 µm for DI group and 67 ± 73 µm for CI group, and there were no differences between then (p = .553). CONCLUSION Digital impression achieved inlays with higher clinical marginal fit and performed better than the conventional silicone materials.
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Affiliation(s)
| | | | | | - Manuel Bravo
- Oral Health and Preventive Dentistry Department, School of Dentistry, University of Granada, Granada, Spain
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Süsgün Yıldırım Z, Batmaz SG. Monomer release, cell adhesion, and cell viability of indirect restorative materials manufactured with additive, subtractive, and conventional methods. J Oral Sci 2024; 66:9-14. [PMID: 37866923 DOI: 10.2334/josnusd.23-0238] [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: 10/24/2023]
Abstract
PURPOSE The aim of this study was to measure residual monomer, cell adhesion, and cell viability of 3-dimensional printable permanent resin (PR), hybrid ceramic block (HCB), and indirect composite (IC) produced with additive, subtractive, and conventional techniques. METHODS Five 8 × 8 × 2 mm3 samples of each material were prepared for each experiment. In a 24-h period, monomer release was analyzed with high-performance liquid chromatography, and cell viability and adhesion were evaluated with the water-soluble tetrazolium salt test. Data were analyzed with IBM SPSS Statistics 26.0 statistical software, and results were regarded as significant at α = 0.05. RESULTS Monomer release (triethylene glycol dimethacrylate, urethane dimethacrylate, and Bisphenol A glycerolate dimethacrylate) was significantly higher in the IC group. Mean cell viability was significantly lower in the HCB group than in the IC group. CONCLUSION All monomers in the tested materials were released at rates that were below clinical significance. Cell adhesion rates in the groups were similar. Cytotoxic response was classified as minor in the HCB and PR groups and non-cytotoxic in the IC group.
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Affiliation(s)
| | - Sevde Gül Batmaz
- Department of Restorative Dentistry, Faculty of Dentistry, Cukurova University
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Taha AI, Hafez ME. An in vitro study measuring marginal gaps of inlay restorations fabricated from different CAD-CAM materials after thermocycling. BMC Oral Health 2023; 23:974. [DOI: https:/doi.org/10.1186/s12903-023-03687-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 11/21/2023] [Indexed: 12/08/2023] Open
Abstract
Abstract
Background
Many monolithic machined materials have been introduced and provided a suitable mechanical and physical properties for inlay restorations. However, there is shortage in the studies evaluating the marginal adaptation using these materials.
Purpose
This study aimed to compare the effect of fabricating inlay restorations from 3 different CAD-CAM materials on marginal gaps before and after thermocycling.
Materials and methods
Sixty human premolars were randomly divided into 3 groups (n = 20) according to the material used: (e.max CAD, Ivoclar AG, Schaan, Liechtenstein), (HC, Shofu, Koyoto, Japan) and (Brilliant Crios, Coltene, Altstätten, Switzerland) (n = 20). A scanning electron microscope (SEM) (JSM- 6510 lv, JEOL, Tokyo, JAPAN) was used to for measuring the marginal gaps after cementation of inlay restorations. The magnification was adapted to 250x. Marginal gaps were revaluated with SEM after thermocycling. The temperatures of baths were 5 and 55 °C was applied for a total of 5000 cycles. All data were statistically analyzed by using ANCOVA to demonstrate if there were any statistically significant differences between the gap measures after thermocycling of the three independent (unrelated) groups. A Bonferroni adjustmen was used to perform post hoc analysis (α = 0.05).
Results
Post-intervention marginal gap was statistically significantly lower in group EX (110.8 μm) which was statistically significant compared with group SF (112.5 μm) (mean difference=-1.768, P = .007) and group BR (113 μm) (mean difference=-2.272, P = .001), however, in. comparing SF and BR groups, there was no significant difference (mean difference=-0.5, P = .770).
Conclusions
Thermocycling affected the marginal gaps of composite based restoration and resin-modified ceramics widely. However, it had a very small effect on glass ceramics marginal adaptation.
Clinical implications
The marginal gaps of CAD-CAM inlays varied according to material used (ceramic based, combination, or resin based). Thermocycling has a minor effect on the marginal adaptation of lithium disilicate glass-ceramic inlays, where it affected the margin of resin-modified ceramic and composite based inlays greatly. Using lithium disilicate glass-ceramic might improve the clinical longevity of inlay restored teeth.
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Taha AI, Hafez ME. An in vitro study measuring marginal gaps of inlay restorations fabricated from different CAD-CAM materials after thermocycling. BMC Oral Health 2023; 23:974. [PMID: 38057781 PMCID: PMC10702051 DOI: 10.1186/s12903-023-03687-4] [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: 07/13/2023] [Accepted: 11/21/2023] [Indexed: 12/08/2023] Open
Abstract
BACKGROUND Many monolithic machined materials have been introduced and provided a suitable mechanical and physical properties for inlay restorations. However, there is shortage in the studies evaluating the marginal adaptation using these materials. PURPOSE This study aimed to compare the effect of fabricating inlay restorations from 3 different CAD-CAM materials on marginal gaps before and after thermocycling. MATERIALS AND METHODS Sixty human premolars were randomly divided into 3 groups (n = 20) according to the material used: (e.max CAD, Ivoclar AG, Schaan, Liechtenstein), (HC, Shofu, Koyoto, Japan) and (Brilliant Crios, Coltene, Altstätten, Switzerland) (n = 20). A scanning electron microscope (SEM) (JSM- 6510 lv, JEOL, Tokyo, JAPAN) was used to for measuring the marginal gaps after cementation of inlay restorations. The magnification was adapted to 250x. Marginal gaps were revaluated with SEM after thermocycling. The temperatures of baths were 5 and 55 °C was applied for a total of 5000 cycles. All data were statistically analyzed by using ANCOVA to demonstrate if there were any statistically significant differences between the gap measures after thermocycling of the three independent (unrelated) groups. A Bonferroni adjustmen was used to perform post hoc analysis (α = 0.05). RESULTS Post-intervention marginal gap was statistically significantly lower in group EX (110.8 μm) which was statistically significant compared with group SF (112.5 μm) (mean difference=-1.768, P = .007) and group BR (113 μm) (mean difference=-2.272, P = .001), however, in. comparing SF and BR groups, there was no significant difference (mean difference=-0.5, P = .770). CONCLUSIONS Thermocycling affected the marginal gaps of composite based restoration and resin-modified ceramics widely. However, it had a very small effect on glass ceramics marginal adaptation. CLINICAL IMPLICATIONS The marginal gaps of CAD-CAM inlays varied according to material used (ceramic based, combination, or resin based). Thermocycling has a minor effect on the marginal adaptation of lithium disilicate glass-ceramic inlays, where it affected the margin of resin-modified ceramic and composite based inlays greatly. Using lithium disilicate glass-ceramic might improve the clinical longevity of inlay restored teeth.
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Affiliation(s)
- Ahmed Ismail Taha
- Department of Prosthodontic, Faculty of Dentistry, Kafrelsheikh University, Mubark Road, Kafr Abu Tabl, Kafrelsheikh Governorate, Kafrelsheikh, 33511, Egypt.
| | - Mona Elshirbini Hafez
- Department of Conservative, Faculty of Dentistry, Kafrelsheikh University, Kafrelsheikh, Egypt
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Kobayashi M, Niizuma Y, Sugai R, Manabe A. Influence of the Crystallization Firing Process on Marginal and Internal Adaptation of Silicate-based Glass-ceramic Inlays Fabricated With a CAD/CAM Chairside System. Oper Dent 2023; 48:657-665. [PMID: 37882476 DOI: 10.2341/22-120-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2023] [Indexed: 10/27/2023]
Abstract
OBJECTIVE Computer-aided design/computer-aided manufacturing (CAD/CAM) systems are widely used in dental treatment. Clinicians can use chairside CAD/CAM technology, which has the advantage of being able to fabricate inlays on the same day. We aimed to evaluate the effects of crystallization firing processes, fabrication methods (one-step and two-step), and materials on marginal and internal adaptations of silicate-based glass-ceramic all-ceramic inlays fabricated with CAD/CAM chairside systems. METHODS Ten artificial mandibular left first molars were prepared with standardized ceramic class II mesialocclusal (MO) inlay cavities. Optical impressions were obtained using CEREC Omnicam Ban. IPS e-max CAD (IE), (Ivoclar Vivadent, Schaan, Liechtenstein), Initial LiSi Block (LS) (Hongo, Bunkyoku, Tokyo, Japan), VITA Suprinity (SP), (Vita Zahnfabrick, Bad Säckingen, Germany), and Celtra Duo (CD) (Ivoclar Vivadent, Schaan, Liechtenstein) (n=10) were milled using CEREC MC XL (Bensheim, Germany). IE and SP were crystallization-fired using CEREC Speed Fire. The silicone replica technique was used for the measurement of internal (axial and pulpal walls) and marginal (cervical and occlusal edge) adaptations. The adaptations were measured using a thin layer of light-body polyvinyl siloxane impression material placed between the master tooth inlay preparation and restoration. Marginal and internal adaptations of IE, LS, SP, and CD were measured using a stereomicroscope (500×). For IE and SP, marginal and internal adaptations were measured before and after the crystallization firing process. Data analyses were conducted using one-way ANOVA and the Tukey test. For IE and SP, marginal and internal adaptations before and after the crystallization firing process were analyzed using the t-test. The significance level was set at α=0.05. RESULTS One-way ANOVA revealed statistically significant differences in occlusal and cervical edge marginal adaptations among the material groups (p<0.001). The Tukey HSD test revealed a significant difference in marginal occlusal and cervical edge adaptations between LS and CD groups and IE and SP groups (p≤0.05). For IE and SP inlays, the t-test revealed a significant difference between occlusal and cervical edge adaptations before the crystallization firing process and those after the crystallization firing process, with the latter group showing a more significant discrepancy in adaptation than the former group (p≤0.05). CONCLUSIONS Fabrication methods (one- and two-step) affected the marginal adaptation compatibility but not internal compatibility of MO inlays. The crystallization firing process affected the marginal adaptation of inlays using lithium silicate or lithium disilicate glass-ceramics. However, adaptation to the cavity was considered clinically acceptable for all materials.
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Affiliation(s)
- M Kobayashi
- *Mikihiro Kobayashi, DDS, PhD, Department of Conservative Dentistry, Division of Aesthetic Dentistry and Clinical Cariology, Showa University School of Dentistry, Tokyo, Japan
| | - Y Niizuma
- Yuiko Niizuma, DDS, PhD, Department of Conservative Dentistry, Division of Aesthetic Dentistry and Clinical Cariology, Showa University School of Dentistry, Tokyo, Japan
| | - R Sugai
- Rintaro Sugai, DDS, Department of Conservative Dentistry, Division of Aesthetic Dentistry and Clinical Cariology, Showa University School of Dentistry, Tokyo, Japan
| | - A Manabe
- Atsufumi Manabe, Department of Conservative Dentistry, Division of Aesthetic Dentistry and Clinical Cariology, Showa University School of Dentistry, Tokyo, Japan
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Ayres G, Parize H, Mendonça LM, Kubata BR, Tirapelli C. Is the digital workflow more efficient for manufacturing partial-coverage restorations? A systematic review. J Prosthet Dent 2023:S0022-3913(23)00506-1. [PMID: 37716898 DOI: 10.1016/j.prosdent.2023.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 08/01/2023] [Accepted: 08/02/2023] [Indexed: 09/18/2023]
Abstract
STATEMENT OF PROBLEM A consensus on whether a fully digital workflow can replace conventional methods of manufacturing partial-coverage restorations is lacking. PURPOSE The purpose of this systematic review was to evaluate the accuracy, fit, and clinical outcomes of inlay, onlay, overlay, and endocrown restorations obtained with both digital and conventional workflows. MATERIAL AND METHODS This study complied with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines and was registered in the International Prospective Register of Systematic Reviews database (CRD42021258696). Studies evaluating the accuracy, fit, and clinical outcomes of inlay, onlay, overlay, and endocrown restorations obtained with digital and conventional workflows were included from 5 databases searched in November 2022. The Checklist for Reporting Randomized Clinical Studies (ROB 2) and the Checklist for Reporting In vitro Studies (CRIS guidelines) were used to assess the risk of bias. RESULTS Twenty-three studies were included in this review. Sixteen studies evaluated marginal and internal fit, 5 evaluated accuracy, 3 evaluated fracture resistance, and 1 evaluated long-term clinical performance. Although most studies reported acceptable clinical outcomes for both workflows, 11 studies showed better results with the conventional workflow, 10 with the digital workflow, and 2 reported that the outcomes of the workflows were similar. CONCLUSIONS Clinically acceptable values have been reported for the parameters evaluated in both digital and conventional workflows, and no consensus has been reached regarding the more efficient method.
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Affiliation(s)
- Gabriela Ayres
- PhD student, Department of Dental Materials and Prosthodontics, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Hian Parize
- PhD student, Department of Prosthodontics, School of Dentistry, University of São Paulo (USP), São Paulo, SP, Brazil
| | - Lucas Moreira Mendonça
- PhD student, Department of Dental Materials and Prosthodontics, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Beatriz Roque Kubata
- PhD student, Department of Dental Materials and Prosthodontics, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Camila Tirapelli
- Associate Professor, Department of Dental Materials and Prosthodontics, University of São Paulo (USP), Ribeirão Preto, SP, Brazil..
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Di Fiore A, Zuccon A, Carraro F, Basilicata M, Bollero P, Bruno G, Stellini E. Assessment Methods for Marginal and Internal Fit of Partial Crown Restorations: A Systematic Review. J Clin Med 2023; 12:5048. [PMID: 37568450 PMCID: PMC10419640 DOI: 10.3390/jcm12155048] [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: 06/30/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
BACKGROUND Different methods are used for the analysis of marginal and internal fit of partial crowns, but not all of them are applicable for in vivo studies. The aim of this review is to search the available methods, described in the current literature, to assess marginal and internal fit in partial crowns. METHODS an electronic search was performed on Pubmed and Web of Science databases to find studies published from 1 January 2017 up to 2 March 2023, following PRISMA guidelines and Cochrane handbook for systematic reviews. The search strategy applied was: "(marginal) AND (fit OR gap OR adaptation OR discrepancy) AND (inlay OR onlay OR partial crown)". In vitro studies which evaluated marginal and internal fit on CAD CAM or 3D printed partial crowns were included in this review. Quality of the studies was assessed by using Quality Assessment Tool For In Vitro Studies (QUIN tool). RESULTS 22 studies were included. Among conventional methods, direct view with microscope, indirect view on resin replicas, and silicone replica technique (SRT) were used. Considering new digital methods, micro-CT, SRT 3D and triple scan technique (TST) were applied. CONCLUSIONS Among 2D methods, direct view technique is the most used marginal fit analysis. For a more comprehensive evaluation, a 3D digital analysis is suggested. SRT and indirect view are the only 2D methods available for in vivo analysis. A protocol for the application of TST for assessment in vivo is now available, but no studies are reported in literature yet.
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Affiliation(s)
- Adolfo Di Fiore
- Department of Neuroscience, Section of Prosthetic and Digital Dentistry, University of Padova, 35122 Padova, Italy; (A.Z.); (G.B.); (E.S.)
| | - Andrea Zuccon
- Department of Neuroscience, Section of Prosthetic and Digital Dentistry, University of Padova, 35122 Padova, Italy; (A.Z.); (G.B.); (E.S.)
| | - Filippo Carraro
- Department of Neuroscience, Section of Prosthetic and Digital Dentistry, University of Padova, 35122 Padova, Italy; (A.Z.); (G.B.); (E.S.)
| | - Michele Basilicata
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Roma, Italy; (M.B.); (P.B.)
| | - Patrizio Bollero
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Roma, Italy; (M.B.); (P.B.)
| | - Giovanni Bruno
- Department of Neuroscience, Section of Prosthetic and Digital Dentistry, University of Padova, 35122 Padova, Italy; (A.Z.); (G.B.); (E.S.)
| | - Edoardo Stellini
- Department of Neuroscience, Section of Prosthetic and Digital Dentistry, University of Padova, 35122 Padova, Italy; (A.Z.); (G.B.); (E.S.)
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Pilecco RO, Dapieve KS, Baldi A, Valandro LF, Scotti N, Pereira GKR. Comparing the accuracy of distinct scanning systems and their impact on marginal/internal adaptation of tooth-supported indirect restorations. A scoping review. J Mech Behav Biomed Mater 2023; 144:105975. [PMID: 37379673 DOI: 10.1016/j.jmbbm.2023.105975] [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: 04/27/2023] [Revised: 06/09/2023] [Accepted: 06/11/2023] [Indexed: 06/30/2023]
Abstract
OBJECTIVE To summarize the existing scientific evidence on the effect of distinct intraoral (IOS) and extraoral (EOS) scanners in terms of their accuracy for image acquisition and the marginal/internal adaptation of indirect restorations. METHODS The protocol of this scoping review is available online (https://osf.io/cwua7/). A structured search, with no date restriction, was performed in LILACS, MEDLINE via Pubmed, EMBASE, Web of Science, and Scopus, for articles written in English. The inclusion criteria were studies that considered at least two scanners, regardless of method (intra or extraoral), for the production of tooth-supported restorations. Two independent and blinded researchers screened the studies, collected and analyzed the data descriptively. RESULTS 103 studies were included (55 on marginal/internal adaptation, 33 on accuracy, 5 on both outcomes, and 10 reviews). Most of them, shown clinically acceptable adaptation (<120 μm). Factors commonly related to the performance of scanners are: use of anti-reflection powders, method of image acquisition, and restoration/tooth characteristics. The need of anti-reflection powders was controversial. Different scanning principles seems to result on similar performance; IOS that combine them could be promising. The most explored systems were Omnicam - IOS, and inEos X5 - EOS, which showed similar performance on marginal/internal adaptation. Scarce studies explored the performance of EOS systems, especially in terms of accuracy. Different restoration designs as single-unit seemed not to modify the performance of scanners. Limited information is available regarding the planned cement space, restorative material and design (multi-unit restorations), as also techniques to measure adaptation. CONCLUSIONS Digital scanners are valid approaches to obtain accurate impressions resulting in clinically acceptable restorations. Systems that uses combined principles of image acquisition seems promising for optimal performance. Based on high discrepancy, the quality of evaluated evidence is low, and well-designed studies are still encouraged, especially considering validated IOS/EOS as a control comparison condition.
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Affiliation(s)
- Rafaela Oliveira Pilecco
- Post-Graduate Program in Oral Sciences, Division of Prosthodontics, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | - Kiara Serafini Dapieve
- Post-Graduate Program in Oral Sciences, Division of Prosthodontics, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | - Andrea Baldi
- Department of Surgical Sciences, Endodontics and Operative Dentistry. Dental School, University of Turin (UNITO), Piemonte State, Italy.
| | - Luiz Felipe Valandro
- Post-Graduate Program in Oral Sciences, Division of Prosthodontics, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | - Nicola Scotti
- Department of Surgical Sciences, Endodontics and Operative Dentistry. Dental School, University of Turin (UNITO), Piemonte State, Italy.
| | - Gabriel Kalil Rocha Pereira
- Post-Graduate Program in Oral Sciences, Division of Prosthodontics, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
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Hassouneh L, Jum'ah A, Ferrari M, Wood DJ. A Micro-computed Tomography Analysis of Marginal and Internal Fit of Endocrowns Fabricated from Three CAD/CAM Materials. Oper Dent 2023; 48:79-89. [PMID: 36445975 DOI: 10.2341/21-105-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/07/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To assess the marginal and internal misfit of endocrowns fabricated from a resin matrix ceramic (CS), a partially crystallized (EMC), and a fully crystallized (ILS) lithium disilicate glass-ceramic. METHODS AND MATERIALS Thirty human premolar teeth restored with endocrowns were investigated. Three CAD/CAM materials were used (n=10 per group): CS, EMC, and ILS. Two-dimensional (2D) analysis of marginal and internal misfit was performed on micro-computed tomography scans before and after adhesive bonding. Further, three-dimensional (3D) analysis was performed to determine the total internal volume discrepancy. Surface roughness of the fitting surfaces of endocrowns was characterized using optical profilometry and scanning electron microscopy. RESULTS Adhesive bonding did not significantly affect marginal or internal misfit (p≥0.093). Differences in marginal misfit among the experimental groups were not statistically significant (p≥0.221). However, differences in 2D internal misfit were statistically significant; the CS group exhibited the largest internal misfit (p=0.001), while no significant difference was found between other groups (p=0.123). The largest discrepancies were observed at the pulpal floor and cervical region of all investigated specimens. No statistically significant difference was found in 3D misfit between ILS and EMC groups (p=0.711); however both exhibited statistically lower 3D misfit values compared to the CS group (p≤0.037). ILS endocrowns exhibited the smoothest and most homogenous fitting surface profile (p<0.001). However, there was no significant correlation between 2D internal misfit and the surface roughness (p≥0.082). CONCLUSIONS The choice of CAD/CAM material may influence the fitting accuracy of endocrowns. The investigated lithium disilicate glass-ceramics conferred superior internal fit for endocrowns compared to resin matrix ceramic.
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Affiliation(s)
- L Hassouneh
- Layla Hassouneh, PhD, MClinDent, BDS, University of Leeds, School of Dentistry, Division of Restorative Dentistry, Leeds, UK; and Department of Conservative Dentistry, Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan
| | - A Jum'ah
- *Ahmad Jum'ah, PhD, MRD(Pros.)RSCEd, RSCEd, JB, MSc, BDS, Department of Conservative Dentistry, Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan; and Faculty of Dentistry, Aqaba Medical Sciences University, Aqaba, Jordan
| | - M Ferrari
- Marco Ferrari, MD DDS, PhD, 1. University of Siena, Department of Medical Biotechnologies, Division of Fixed Prosthodontics, Siena, Italy 2. University of Leeds, School of Dentistry, Division of Restorative Dentistry, Leeds, UK
| | - D J Wood
- David J Wood, BSc, PhD, University of Leeds, School of Dentistry, Division of Oral Biology, Leeds, UK
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Grassi EDA, de Andrade GS, Tribst JPM, Machry RV, Valandro LF, Ramos NDC, Bresciani E, Saavedra GDSFA. Fatigue behavior and stress distribution of molars restored with MOD inlays with and without deep margin elevation. Clin Oral Investig 2021; 26:2513-2526. [PMID: 34643807 DOI: 10.1007/s00784-021-04219-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 10/04/2021] [Indexed: 11/26/2022]
Abstract
OBJECTIVES This study evaluated the effect of deep margin elevation (DME) and restorative materials (leucite-reinforced glass-ceramics [C] vs. indirect resin composite [R]) on the fatigue behavior and stress distribution of maxillary molars with 2-mm deep proximal margins restored with MOD inlay. METHODS Fifty-two extracted human third molars were randomly assigned into four groups (n = 13): C; DME + C; R; and DME + R. Inlays were fabricated in CAD-CAM and bonded to all teeth. The fatigue behavior was assessed with the stepwise stress test (10,000 cycles/step; step = 50 N; 20 Hz; initial load = 200 N). Fatigue failure loads and the number of cycles were analyzed with 2-way ANOVA and Tukey's test (p < 0.05) and Kaplan-Meier survival plots. The stress distribution was assessed with finite element analysis. The models were considered isotropic, linear, and homogeneous, and presented bonded contacts. A tripod axial load (400 N) was applied to the occlusal surface. The stress distribution was analyzed with the maximum principal stress criterion. RESULTS For fatigue, there was no difference for DME factor (p > 0.05). For the material factor, the load and number of cycles for failure were statistically higher in the R groups (p < 0.05). The finite element analysis showed that resin composite inlays concentrated more stress in the tooth structure, while ceramic inlays concentrated more stress in the restoration. Non-reparable failures were more frequent in the resin composite inlays groups. CONCLUSIONS DME was not negative for fatigue and biomechanical behaviors. Resin composite inlays were more resistant to the fatigue test, although the failure mode was more aggressive. CLINICAL SIGNIFICANCE DME does not impair mechanical behavior. Resin composite inlays failed at higher loads but with a more aggressive failure mode.
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Affiliation(s)
- Elisa Donaria Aboucauch Grassi
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (Unesp), 777th Eng. Francisco José Longo Av., São José dos Campos, SP, 12245-000, Brazil
| | - Guilherme Schmitt de Andrade
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (Unesp), 777th Eng. Francisco José Longo Av., São José dos Campos, SP, 12245-000, Brazil
| | - João Paulo Mendes Tribst
- Post-Graduate Program in Dentistry, University of Taubaté (UNITAU), 09th Rua Dos Operários St., Taubaté, SP, 12020-340, Brazil
| | - Renan Vaz Machry
- Graduate Program of Oral Science, Prosthodontics Unit, School of Dentistry, Federal University of Santa Maria (UFSM), Roraima Av, Santa Maria, RS, 100097105-340, Brazil
| | - Luiz Felipe Valandro
- Graduate Program of Oral Science, Prosthodontics Unit, School of Dentistry, Federal University of Santa Maria (UFSM), Roraima Av, Santa Maria, RS, 100097105-340, Brazil
| | - Nathalia de Carvalho Ramos
- School of Dentistry, São Francisco University (USF), 218th São Francisco de Assis Av., Bragança Paulista, SP, 12916-900, Brazil
| | - Eduardo Bresciani
- Department of Restorative Dentistry, Institute of Science and Technology, São Paulo State University (Unesp), 777th Eng. Francisco José Longo Av., São José dos Campos, SP, 12245-000, Brazil
| | - Guilherme de Siqueira Ferreira Anzaloni Saavedra
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (Unesp), 777th Eng. Francisco José Longo Av., São José dos Campos, SP, 12245-000, Brazil.
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García-Cuesta C, Faus-Llácer V, Zubizarreta-Macho Á, Botello-Torres R, Faus-Matoses V. A comparison of the marginal adaptation of composite overlays fabricated with silicone and an intraoral scanner. J Clin Exp Dent 2021; 13:e473-e478. [PMID: 33981394 PMCID: PMC8106928 DOI: 10.4317/jced.58140] [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: 11/15/2020] [Accepted: 12/20/2020] [Indexed: 11/05/2022] Open
Abstract
Background Intraoral scanners have been developing during last years. The aim of this study was to know if digital impressions achieve a marginal adaptation in overlays as well as conventional impressions with silicone.
Material and Methods Sixty-two extracted molars were selected. The samples were prepared for MOD overlays. The teeth were divided into two groups (n=31). Group 1: impressions were made with silicone (Express™ Impression, 3M ESPE) and overlays were manufactured with Sinfony composite (3M ESPE) by the laboratory technician. Group 2: impressions were taken with the scanner True Definition (TD, 3M ESPE) and under Lava Ultimate CAD/CAM Restorative composite (3M ESPE) were produced the restorations. Under 32x magnification images of vestibular, lingual, mesial and distal were capture in all the samples. Then the fit of the restorations was evaluated before and after cementation. Data were analysed statistically applying ANOVA and Bonferroni test.
Results The marginal gap was better in TD group before (169,76 ± 54,15 µm) and after (145,16 ± 57,89 µm) cementation than in the silicone group (190,89 ± 58,18 µm) (187,47 ± 81,29 µm). The lowest marginal gap was in oclusal surface and the higher value was in the proximal margin for all the groups.
Conclusions Digital impressions regarding marginal adaptation achieve better results than conventional impressions. Key words:Composite onlays, overlays, restorative, CAD/CAM, intraoral scanner, silicone impressions, marginal adaptation.
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Affiliation(s)
- Carla García-Cuesta
- PHD student. Department of Endodontics, Faculty of Medicine and Dentistry, University of Valencia, Spain
| | - Vicente Faus-Llácer
- Director of the master's Program in Endodontics. Department of Endodontics, Faculty of Medicine and Dentistry, University of Valencia, Spain
| | - Álvaro Zubizarreta-Macho
- Department of Endodontics, Faculty of Health Sciences, Alfonso X El Sabio University, Madrid, Spain
| | - René Botello-Torres
- Professor of the master's Program in Endodontics. Department of Endodontics, Faculty of Medicine and Dentistry, University of Valencia, Spain
| | - Vicente Faus-Matoses
- Co-director of the master's Program in Endodontics. Department of Endodontics, Faculty of Medicine and Dentistry, University of Valencia, Spain
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Sharma A, Abraham D, Gupita A, Singh A, Sharma N. Comparative Evaluation of the Marginal Fit of Inlays Fabricated by Conventional and Digital Impression Techniques: A Stereomicroscopic Study. Contemp Clin Dent 2021; 11:237-244. [PMID: 33776349 PMCID: PMC7989749 DOI: 10.4103/ccd.ccd_375_19] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 05/17/2020] [Accepted: 06/08/2020] [Indexed: 11/04/2022] Open
Abstract
Context Marginal fit being the prime concern of indirect restorations. Inlays can be either fabricated by conventional technique or computer-aided design and computer-aided manufacturing (CAD/CAM) techniques. CAD/CAM is the most evolving digital technique with faster, quicker, and precise results. Aims The aim of this study is to evaluate and compare the marginal fit of MOD inlays fabricated with two different CAD/CAM methods and conventional fabrication methods. Settings and Design Mesio-occlusal-distal preparation was done on a maxillary premolar typhodont tooth and divided into the following groups. Group A: 30 inlays were fabricated through the conventional impression technique. Group B: Preparation was scanning using an intraoral scanner followed by subtractive milling (Group B1) and subtractive milling of wax patterns (Group B2). Similarly, subgrouping was carried out for Group C except that an extraoral scanner was used. Occlusal and the cervical marginal fit were assessed using the replica technique and stereomicroscope. One-way ANOVA followed by Tukey honestly significant difference post hoc test for determining differences at a 95% level of confidence (P = 0.05). Results Group A had the highest marginal discrepancy in comparison to Group B and Group C at occlusal and cervical edges, whereas subtractive milling showed comparatively better results than subtractive milling of wax patterns at cervical edges and similar results at occlusal edges. Conclusions Ceramic inlays fabricated by subtractive milling yielded better results.
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Affiliation(s)
- Anamika Sharma
- Department of Conservative Dentistry and Endodontics, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Dax Abraham
- Department of Conservative Dentistry and Endodontics, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Alpa Gupita
- Department of Conservative Dentistry and Endodontics, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Arundeep Singh
- Department of Conservative Dentistry and Endodontics, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Naresh Sharma
- Department of Pedodontics and Preventive Dentistry, Manav Rachna Dental College, Faridabad, Haryana, India
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15
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Ioannidis A, Park JM, Hüsler J, Bomze D, Mühlemann S, Özcan M. An in vitro comparison of the marginal and internal adaptation of ultrathin occlusal veneers made of 3D-printed zirconia, milled zirconia, and heat-pressed lithium disilicate. J Prosthet Dent 2021; 128:709-715. [PMID: 33741143 DOI: 10.1016/j.prosdent.2020.09.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 09/11/2020] [Accepted: 09/11/2020] [Indexed: 10/21/2022]
Abstract
STATEMENT OF PROBLEM Whether additively produced zirconia could overcome problems with conventional computer-aided design and computer-aided manufacture (CAD-CAM) such as milling inaccuracies and provide accurate occlusal veneers is unclear. PURPOSE The purpose of this in vitro study was to compare the marginal and internal fit of 3D-printed zirconia occlusal veneers with CAD-CAM-fabricated zirconia or heat-pressed lithium disilicate ceramic (LS2) restorations on molars. MATERIAL AND METHODS The occlusal enamel in 60 extracted human molars was removed, with the preparation extending into dentin. Occlusal veneers at a thickness of 0.5 mm were designed and manufactured according to their group allocation: 3DP, 3D-printed zirconia; CAM, milled zirconia; and HPR, heat-pressed LS2. The prepared teeth and restorations were scanned and superimposed, and the marginal and internal adaptation were measured 2- and 3-dimensionally; the production accuracy (trueness) was also measured. The comparisons of the group medians were performed with nonparametric methods and a pairwise group comparison (α=.05). RESULTS Three-dimensionally printed zirconia revealed median outcomes of 95 μm (margin), 252 μm (cusp), 305 μm (fossa), and 184 μm (3D internal adaptation). CAM showed median values of 65 μm (margin), 128 μm (cusp), 203 μm (fossa), and 120 μm (3D internal adaptation). The respective values for the group HPR were 118 μm (margin), 251 μm (cusp), 409 μm (fossa), and 180 μm (3D internal adaptation). Significant differences (P<.001) between CAM and 3DP (cusp, fossa, 3D internal adaptation) and between CAM and HPR (all regions) were found, with the former group showing higher accuracies. The trueness showed median discrepancies of 26 μm (3DP), 13 μm (CAM), and 29 μm (HPR) with significant differences (P<.001) for the comparisons 3DP-CAM and CAM-HPR. CONCLUSIONS Three-dimensionally printed zirconia occlusal veneers produced by means of lithography-based ceramic manufacturing exhibit a marginal adaptation (95 μm) and a production accuracy (26 μm) similar to those of conventional methods.
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Affiliation(s)
- Alexis Ioannidis
- Senior Teaching and Research Assistant, Clinic of Reconstructive Dentistry, Center of Dental, University of Zurich, Zurich, Switzerland.
| | - Ji-Man Park
- Associate Professor, Department of Prosthodontics, Yonsei University, Seoul, Republic of Korea
| | - Jürg Hüsler
- Professor, Institute of Mathematical Statistics and Actuarial Science (IMSV), University of Bern, Bern, Switzerland
| | - Daniel Bomze
- Head of Business Unit Medical, Lithoz GmbH, Vienna, Austria
| | - Sven Mühlemann
- Senior Teaching and Research Assistant, Clinic of Reconstructive Dentistry, Center of Dental, University of Zurich, Zurich, Switzerland
| | - Mutlu Özcan
- Head, Division of Dental Biomaterials, Clinic of Reconstructive Dentistry, Center of Dental, University of Zurich, Zurich, Switzerland
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16
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Sampaio FBWR, Özcan M, Gimenez TC, Moreira MSNA, Tedesco TK, Morimoto S. Effects of manufacturing methods on the survival rate of ceramic and indirect composite restorations: A systematic review and meta‐analysis. J ESTHET RESTOR DENT 2019; 31:561-571. [PMID: 31840412 DOI: 10.1111/jerd.12555] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 10/10/2019] [Accepted: 11/18/2019] [Indexed: 11/29/2022]
Affiliation(s)
| | - Mutlu Özcan
- Dental Materials Unit University of Zürich Zürich Switzerland
| | - Thais C. Gimenez
- Master Program in Dentistry Universidade Ibirapuera São Paulo Brazil
| | | | - Tamara K. Tedesco
- Master Program in Dentistry Universidade Ibirapuera São Paulo Brazil
| | - Susana Morimoto
- Master Program in Dentistry Universidade Ibirapuera São Paulo Brazil
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17
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El Ghoul WA, Özcan M, Ounsi H, Tohme H, Salameh Z. Effect of different CAD-CAM materials on the marginal and internal adaptation of endocrown restorations: An in vitro study. J Prosthet Dent 2019; 123:128-134. [PMID: 31027958 DOI: 10.1016/j.prosdent.2018.10.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 10/12/2018] [Accepted: 10/12/2018] [Indexed: 11/19/2022]
Abstract
STATEMENT OF PROBLEM Recent resin-based and ceramic-based computer-aided design and computer-aided manufacturing (CAD-CAM) materials have been used to restore endodontically treated teeth. Adaptation of the restoration is important for clinical success, but studies evaluating the effect of these materials on the adaptation of endocrowns are lacking. PURPOSE The purpose of this in vitro study was to evaluate the effect of resin-based and ceramic-based materials on the marginal and internal adaptation of endocrowns. MATERIAL AND METHODS Forty mandibular molars were divided into 4 groups (n=10); each group was restored with a different CAD-CAM material: group C: hybrid nanoceramic (Cerasmart; GC Corp), group T: fiber-composite material (Trilor; Bioloren Srl), group E: lithium disilicate glass-ceramic (IPS e.max CAD; Ivoclar Vivadent AG), and group V: zirconia-reinforced lithium silicate glass-ceramic (Vita Suprinity; VITA Zahnfabrik GmbH). A digital scan was made with an intraoral digital scanner (TRIOS 3; 3Shape A/S), and endocrowns were milled with a 5-axis milling machine (Coritec 250i; imes-icore GmbH). The replica technique and a stereomicroscope (×70) were used to measure the marginal and internal adaptation of the endocrowns at 32 points. All data were statistically analyzed using 1-way ANOVA and the Tukey honestly significant difference test (α=.05). RESULTS Statistical tests showed significant differences among the tested groups (P<.001). The resin-based groups displayed larger discrepancies than the ceramic-based groups. The resin-based groups showed a mean marginal gap larger than the mean internal gap C (P=.009), T (P<.001), whereas the ceramic-based groups showed similar gaps, V (P=.396), E (P=.936). The largest gap was observed at the pulpal floor (P<.001). CONCLUSIONS All materials had clinically acceptable internal and marginal gaps (≤150 μm), except for the marginal gap of the Trilor group.
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Affiliation(s)
- Wiam A El Ghoul
- Chief of clinical services, Department of Prosthodontics, School of Dentistry, Lebanese University, Beirut, Lebanon.
| | - Mutlu Özcan
- Professor, Department of Dental Materials, School of Dentistry, University of Zurich, Zurich, Switzerland
| | - Hani Ounsi
- Professor, Department of Endodontics, School of Dentistry, Lebanese University, Beirut, Lebanon
| | - Hani Tohme
- Department of Prosthodontics, School of Dentistry, Saint Joseph University, Beirut, Lebanon
| | - Ziad Salameh
- Professor, Department of Research, Department of Prosthodontics, School of Dentistry, Lebanese University, Beirut, Lebanon
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18
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Goujat A, Abouelleil H, Colon P, Jeannin C, Pradelle N, Seux D, Grosgogeat B. Marginal and internal fit of CAD-CAM inlay/onlay restorations: A systematic review of in vitro studies. J Prosthet Dent 2018; 121:590-597.e3. [PMID: 30509548 DOI: 10.1016/j.prosdent.2018.06.006] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 06/11/2018] [Accepted: 06/11/2018] [Indexed: 10/27/2022]
Abstract
STATEMENT OF PROBLEM Different parameters can influence the adaptation of computer-assisted design and computer-assisted manufacturing (CAD-CAM) inlay/onlay restorations. However, systematic reviews to identify and discuss these parameters are lacking. PURPOSE The purpose of this systematic review was to summarize the scientific literature investigating all parameters that can influence both the marginal and internal adaptation of CAD-CAM inlay/onlay restorations. MATERIAL AND METHODS An electronic search was conducted by 2 independent reviewers for studies published in English between January 1, 2007 and September 20, 2017 on the PubMed/MEDLINE, Scopus, and Web of Science databases and in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. Factors investigated in the selected articles included the type of CAD-CAM system, virtual space parameters, version of the software, type of block, luting procedure, type of restoration, sample size and aging procedure, evaluation method, and number of measurement points per specimen. RESULTS A total of 162 articles were identified, of which 23 articles met the inclusion criteria. Nine studies investigated adaptation with different restorative materials, 2 evaluated adaptation according to the type of preparation design, 9 compared adaptation before/after thermomechanical loading, and 2 before/after cementation, 1 study investigated marginal adaptation based on whether the optical scan was made intraorally or extraorally, 1 compared adaptation with 5 and 3 axis CAM systems, and 1 assessed adaptation with 4 different intraoral scanners. The risk of bias was high for 7, medium for 15, and low for 1 of the studies reviewed. The high level of heterogeneity across the studies excluded meta-analysis. CONCLUSIONS Most of the studies reported clinically acceptable values for marginal adaptation. The performance of a CAD-CAM system is influenced by the type of restorative material. A nonretentive cavity preparation exhibited better adaptation than a retentive preparation. Most studies showed that thermomechanical loading affected the quality of marginal adaptation. Cementation increased marginal discrepancies. No statistically significant difference was found for marginal fit of onlays between intraoral and extraoral optical scans using a stone die. The number of milling axes, the type of digital camera, and the region measured were statistically significant in relation to marginal/internal adaptation. Values of adaptation recorded failed to reproduce the preestablished spacer parameters in the software. Clarification is needed concerning adaptation according to the type of preparation design, the type of material, the choice of intrinsic parameters for the CAD process, the type and shape of milling instruments, and the behavior of the material during milling. Adaptation of CAD-CAM inlay/onlays should be evaluated under clinical conditions.
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Affiliation(s)
- Alexis Goujat
- Associate Professor, Laboratory of Multimaterials and Interfaces, UMR CNRS 5615, Lyon 1 University, Lyon, France; Faculty of Odontology, Department of Restorative Dentistry, Lyon Civil Hospices, Lyon, France.
| | - Hazem Abouelleil
- Associate Professor, Laboratory of Multimaterials and Interfaces, UMR CNRS 5615, Lyon 1 University, Lyon, France; Faculty of Odontology, Department of Prosthodontics, Lyon Civil Hospices, Lyon, France
| | - Pierre Colon
- Professor, Laboratory of Multimaterials and Interfaces, UMR CNRS 5615, Lyon 1 University, Lyon, France; Faculty of Odontology, Department of Restorative Dentistry, Rothschild Hospital, Paris, France
| | - Christophe Jeannin
- Associate Professor, Laboratory of Multimaterials and Interfaces, UMR CNRS 5615, Lyon 1 University, Lyon, France; Faculty of Odontology, Department of Prosthodontics, Lyon Civil Hospices, Lyon, France
| | - Nelly Pradelle
- Associate Professor, Laboratory of Multimaterials and Interfaces, UMR CNRS 5615, Lyon 1 University, Lyon, France; Faculty of Odontology, Department of Restorative Dentistry, Rothschild Hospital, Paris, France
| | - Dominique Seux
- Professor, Laboratory of Multimaterials and Interfaces, UMR CNRS 5615, Lyon 1 University, Lyon, France; Faculty of Odontology, Department of Restorative Dentistry, Lyon Civil Hospices, Lyon, France
| | - Brigitte Grosgogeat
- Professor, Laboratory of Multimaterials and Interfaces, UMR CNRS 5615, Lyon 1 University, Lyon, France; Faculty of Odontology, Department of Dental Biomaterials, Lyon Civil Hospices, Lyon, France
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19
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Pivetta Rippe M, Monaco C, Missau T, Wandscher VF, Volpe L, Scotti R, Bottino MA, Valandro LF. Survival rate and load to failure of premolars restored with inlays: An evaluation of different inlay fabrication methods. J Prosthet Dent 2018; 121:292-297. [PMID: 30093126 DOI: 10.1016/j.prosdent.2018.03.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 03/17/2018] [Accepted: 03/19/2018] [Indexed: 11/18/2022]
Abstract
STATEMENT OF PROBLEM Studies that evaluate the survival rate and load to fracture of premolars restored with inlays produced using different methods are lacking. PURPOSE The purpose of this in vitro study was to compare the survival rate and fracture load of premolars restored with inlays fabricated using different methods. MATERIAL AND METHODS Thirty maxillary premolars were selected, embedded, and prepared to receive inlays fabricated using different methods (n=10): LaCom-digital scanning with Lava C.O.S. scanner (3M ESPE), followed by milling of composite resin block (Lava Ultimate; 3M ESPE) in a milling unit; CeCom-digital scanning with Cerec 3D Bluecam scanner (Dentsply Sirona), followed by milling of a Lava Ultimate block in Cerec (Dentsply Sirona); PresDis-impression with polyvinyl siloxane, inlay made using the lost wax technique, and IPS e.max Press (Ivoclar Vivadent AG) pressed ceramic (lithium disilicate). A dual-polymerizing resin cement system was used to lute the inlays. Inlays were mechanically cycled (2 Hz, 106 mechanical pulses, 80 N) after 24 hours, and the specimens were stored in distilled water at 37°C for 11 months. Then, a fatigue test was conducted using a 10-Hz frequency and 400-N load on the inner inclines of the cusps. The test was complete when the specimen fractured or when the specimen reached 1.5×106 cycles. The specimens that survived fatigue testing were submitted to a single-load fracture test in a universal testing machine and analyzed using a stereoscope for failure classification. Survival rates were estimated using the Kaplan-Meier method and log-rank test (Mantel-Cox). Fracture load data were analyzed using 1-way ANOVA (α=.05). RESULTS No significant differences were detected among the groups for the survival rate (P=.87) or for the load to fracture (P=.78). Most failures were longitudinal, catastrophic fractures. CONCLUSIONS Premolars restored with inlays fabricated using the tested methods had similar survival rates and loads to fracture.
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Affiliation(s)
- Marília Pivetta Rippe
- Adjunct Professor, Prosthodontics Unit, Faculty of Odontology, Federal University of Santa Maria (UFSM), Santa Maria, Brazil.
| | - Carlo Monaco
- Assistant Professor and Researcher, Department of Biomedical Sciences and Neuromotor, Division of Prosthodontics, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - Taiane Missau
- Graduate student, Prosthodontics Unit, Faculty of Odontology, Federal University of Santa Maria (UFSM), Santa Maria, Brazil
| | - Vinícius Felipe Wandscher
- Adjunct Professor, Prosthodontics Unit, Faculty of Odontology, Franciscan University Center, Santa Maria, Brazil
| | - Lucia Volpe
- Master student, Department of Biomedical Sciences and Neuromotor, Division of Prosthodontics, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - Roberto Scotti
- Professor, Department of Biomedical Sciences and Neuromotor, Division of Prosthodontics, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - Marco Antonio Bottino
- Professor, Dental Materials and Prosthodontics Unit, São Paulo State University (UNESP), São José dos Campos, Brazil
| | - Luiz Felipe Valandro
- Associate Professor, Prosthodontics Unit, Faculty of Odontology, Federal University of Santa Maria (UFSM), Santa Maria, Brazil
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