1
|
dos Santos Junior WL, Santi MR, Lins RBE, Martins LRM. Effects of a relined fiberglass post with conventional and self-adhesive resin cement. Restor Dent Endod 2024; 49:e18. [PMID: 38841382 PMCID: PMC11148402 DOI: 10.5395/rde.2024.49.e18] [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: 10/28/2023] [Revised: 01/10/2024] [Accepted: 01/26/2024] [Indexed: 06/07/2024] Open
Abstract
Objectives This study was conducted to evaluate the mechanical properties of relined and non-relined fiberglass posts when cemented to root canal dentin using a conventional dual-cure resin cement or a self-adhesive resin cement. Materials and Methods Two types of resin cements were utilized: conventional and self-adhesive. Additionally, 2 cementation protocols were employed, involving relined and non-relined fiberglass posts. In total, 72 bovine incisors were cemented and subjected to push-out bond strength testing (n = 10) followed by failure mode analysis. The cross-sectional microhardness (n = 5) was assessed along the root canal, and interface analyses (n = 3) were conducted using scanning electron microscopy (SEM). Data from the push-out bond strength and cross-sectional microhardness tests were analyzed via 3-way analysis of variance and the Bonferroni post-hoc test (α = 0.05). Results For non-relined fiberglass posts, conventional resin cement exhibited higher push-out bond strength than self-adhesive cement. Relined fiberglass posts yielded comparable results between the resin cements. Type II failure was the most common failure mode for both resin cements, regardless of cementation protocol. The use of relined fiberglass posts improved the cross-sectional microhardness values for both cements. SEM images revealed voids and bubbles in the incisors with non-relined fiberglass posts. Conclusions Mechanical properties were impacted by the cementation protocol. Relined fiberglass posts presented the highest push-out bond strength and cross-sectional microhardness values, regardless of the resin cement used (conventional dual-cure or self-adhesive). Conversely, for non-relined fiberglass posts, the conventional dual-cure resin cement yielded superior results to the self-adhesive resin cement.
Collapse
Affiliation(s)
- Wilton Lima dos Santos Junior
- Operative Dentistry Division, Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - Marina Rodrigues Santi
- Operative Dentistry Division, Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - Rodrigo Barros Esteves Lins
- Operative Dentistry Division, Department of Restorative Dentistry, School of Dentistry, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Luís Roberto Marcondes Martins
- Operative Dentistry Division, Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| |
Collapse
|
2
|
Rajnics Z, Pammer D, Kőnig-Péter A, Turzó K, Marada G, Radnai M. Push-Out Bond Strength of Glass Fiber Endodontic Posts with Different Diameters. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1492. [PMID: 38612007 PMCID: PMC11013009 DOI: 10.3390/ma17071492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/09/2024] [Accepted: 03/22/2024] [Indexed: 04/14/2024]
Abstract
(1) Background: The retention of intraradicular posts is an important factor for the prognosis of endodontically treated teeth. The purpose of this study was to evaluate the push-out bond strength (PBS) of the posts relating to their diameter and region of the root. (2) Methods: A total of 40 premolar teeth (decoronated and root canal-filled) were divided into four groups (n = 10). After post-space preparation, different sizes (1.0, 1.2, 1.5, and 2.0 mm) of glass fiber posts were luted with resin cement into the root canals. After placement, 2 mm thick slices were cut from the roots according to their apical, middle, and coronal regions (n = 116). Push-out tests were carried out in a universal testing machine on each slice. A statistical evaluation of the data was applied. (3) Results: When comparing the diameter, the 2.0 mm posts had the highest PBS (111.99 ± 10.40 N), while the 1.0 mm posts had the lowest PBS (99.98 ± 8.05 N). Divided by the surface of the bonded area, the average PBS value was the highest for the 1.0 mm posts (18.20 ± 1.67 MPa) and the lowest for the 2.0 mm posts (12.08 ± 1.05 MPa). (4) Conclusions: Within the limitations of the study, when comparing the regions of the roots, no significant differences were found among the PBS values of the three regions (p = 0.219). When comparing the diameters, significant differences were shown between the PBS values of the four groups (p = 0.023 and p = 0.003, respectively).
Collapse
Affiliation(s)
- Zsolt Rajnics
- Faculty of Medicine, Dental School, University of Pécs, 7623 Pécs, Hungary; (K.T.); (G.M.)
| | - Dávid Pammer
- Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, 1111 Budapest, Hungary;
| | - Anikó Kőnig-Péter
- Institute of Bioanalysis, Medical School, University of Pécs, 7624 Pécs, Hungary;
| | - Kinga Turzó
- Faculty of Medicine, Dental School, University of Pécs, 7623 Pécs, Hungary; (K.T.); (G.M.)
| | - Gyula Marada
- Faculty of Medicine, Dental School, University of Pécs, 7623 Pécs, Hungary; (K.T.); (G.M.)
| | - Márta Radnai
- Department of Prosthodontics, Faculty of Dentistry, University of Szeged, 6720 Szeged, Hungary;
| |
Collapse
|
3
|
Pinto C, França F, Basting RT, Turssi CP, Amaral F. Evaluation of Bond Strength of Three Glass Fiber Post-systems Cemented to Large Root Canals. Oper Dent 2024; 49:222-230. [PMID: 38349820 DOI: 10.2341/22-142-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: 01/05/2024] [Indexed: 02/15/2024]
Abstract
The aim of this study was to evaluate the push-out bond strength and the failure mode of single adjustable posts (SPLENDOR SAP), anatomical posts (AP), or computer-aided design/computer-aided manufacturing (CAD-CAM) posts cemented to flared root canal dentin with self-adhesive dual-cure resin cement. Thirty single-rooted premolars received endodontic treatment with gutta-percha and a calcium hydroxide-based endodontic cement. After 24 hours, the canal spaces were enlarged with burs. The tooth specimens were divided equally into three groups (n=10), according to the glass fiber post (GFP) system: AP-prefabricated GFP (Reforpost #2, Angelus) was relined with composite resin (Filtek Z350 XT, 3M ESPE); SPLENDOR SAP-GFP was used with a glass fiber sleeve to adjust the adaptation (Splendor SAP, Angelus); and CAD-CAM-a resin pattern was obtained and scanned to produce a CAD-CAM GFP (Fiber CAD Lab, Angelus) milled using a subtractive technique. The three GFP systems were cemented with self-adhesive resin cement (Rely X U200, 3M ESPE). The roots were fixed to an acrylic resin plate used to section them into specimens of cervical, middle, and apical thirds. Then, the slices were attached to a universal testing machine to perform the push- out test at a speed of 0.5 mm/min and a load of 50 Kgf. The posttest specimens were examined under a stereoscopic microscope to evaluate the failure mode. The bond strength variable was analyzed using a generalized linear model, following a split-plot design. Failure mode analysis was performed using Fisher exact test. The significance level adopted was 5%. There was no significant difference among the GFP systems or among the thirds, in terms of bond strength (p>0.05), nor was there any significant association between the systems and the failure mode (p>0.05). Most specimens presented mixed or adhesive failure between resin cement and dentin. It was concluded that the bond strength to flared root dentin was not influenced by the GFP system or the root third.
Collapse
Affiliation(s)
- Cfb Pinto
- *Claudia Fabiana Brazil Pinto, DDS, MS, PhD candidate, Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Campinas, São Paulo, Brazil
| | - Fmg França
- Fabiana Mantovani Gomes França, DDS, MS, PhD, professor, Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Campinas, São Paulo, Brazil
| | - R T Basting
- Roberta Tarkany Basting, DDS, MS, PhD, professor, Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Campinas, São Paulo, Brazil
| | - C P Turssi
- Cecilia Pedroso Turssi, DDS, MS, PhD, professor, Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Campinas, São Paulo, Brazil
| | - Flb Amaral
- Flávia Lucisano Botelho Amaral, DDS, MS, PhD, professor, Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Campinas, São Paulo, Brazil
| |
Collapse
|
4
|
Lima RO, Barros APO, Alencar CDM, Pereira KDF, Galvani LD, Vaz LG, Campos EAD, Kuga MC. Influence of using different translucent composite resins for customizing fiber post on the bond strength of self-adhesive cement to root dentin. Dent Mater J 2024; 43:112-118. [PMID: 38072411 DOI: 10.4012/dmj.2023-184] [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: 02/02/2024]
Abstract
This study evaluated the influence of different translucent resins (Z350 and Opallis) for customizing fiber posts and light-curing the cementation system using different LED equipment (V, Valo or R, Radii-Cal) on the bond strength and adhesive failure pattern at 24 h and 6 months. Eighty roots were prepared and divided into 4 groups (n=20): ZV (Z350 resin and LED Valo), ZR (Z350 resin and LED Radii-Cal), OV (Opallis resin and LED Valo), OR (Opallis resin and LED Radii-Cal). After post space preparation, the fiber post was customized and cemented with self-adhesive cement and light-curing using V or R LED equipment. Bond strength values were submitted to 2-way ANOVA test. ZV and ZR showed higher bond strength values than the other groups at 6 months of evaluation (p<0.05). The Z350 resin has a favorable influence on the bond strength of self-adhesive cement to root dentin, regardless of the LED polymerization equipment used.
Collapse
Affiliation(s)
- Reinaldo Oliveira Lima
- Department of Operative Dentistry, Araraquara Dental School, São Paulo State University (UNESP)
| | | | - Cristiane De Melo Alencar
- Department of Restorative Dentistry, School of Dentistry, University Center of the State of Pará (CESUPA)
| | | | - Lucas David Galvani
- Department of Operative Dentistry, Araraquara Dental School, São Paulo State University (UNESP)
| | - Luís Geraldo Vaz
- Department of Dental Materials and Prosthetics Araraquara Dental School, São Paulo State University (UNESP)
| | - Edson Alves De Campos
- Department of Operative Dentistry, Araraquara Dental School, São Paulo State University (UNESP)
| | - Milton Carlos Kuga
- Department of Operative Dentistry, Araraquara Dental School, São Paulo State University (UNESP)
| |
Collapse
|
5
|
Pinto APDS, França FMG, Basting RT, Turssi CP, Rodrigues Júnior JJ, Amaral FLB. Effect of endodontic sealers on push-out bond strength of CAD-CAM or prefabricated fiber glass posts. Braz Oral Res 2023; 37:e052. [PMID: 37255072 DOI: 10.1590/1807-3107bor-2023.vol37.0052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 06/02/2022] [Indexed: 06/01/2023] Open
Abstract
This study aimed to evaluate the effect of endodontic sealer (ES) on bond strength (BS) of prefabricated or milled-CAD-CAM (computer-aided design and computer-aided manufacturing) glass-fiber-posts (GFP). Canals of 90 single-rooted teeth were prepared for filling by the single-cone technique with gutta-percha and one of the following ES: AH Plus (epoxy resin), Endofill (zinc-oxide and eugenol), and Bio-C Sealer (calcium-silicate). After post-space preparation, tooth-specimens were equally divided in half according to type of GFP to be used. In the half to receive milled-CAD-CAM posts, tooth specimens were molded with acrylic resin to obtain replicas. These were scanned to enable the laboratory to produce the milled-CAD-CAM GFPs (Fiber CAD Lab, Angelus) by the subtractive technique. The other half of samples received prefabricated GFPs (Exacto, Angelus) (n=15). The GFPs were cemented with dual-cure resin cement (Panavia F2.0, Kuraray). Each root was sectioned into two slices per root region (cervical, middle, apical) that were subjected to the push-out BS test, in a universal testing machine. Failure mode (FM) was classified by scores. The BS data were submitted to generalized linear model analyses, while FM was analyzed using the chi-square test (a=0.05). BS showed no significant difference among the three ES (p > 0.05). BS was significantly higher for prefabricated (mean 10.84 MPa) versus milled-CAD-CAM GFPs (mean 6.94 MPa) (p <0.0001), irrespective of ES. The majority showed mixed failures. It could be concluded that type of ES did not affect BS of GFPs to dentin, and prefabricated-GFPs had higher bond-strength than customized-milled-CAD-CAM GFPs.
Collapse
Affiliation(s)
- Andréa Pereira de Souza Pinto
- Instituto de Pesquisas São Leopoldo Mandic, São Leopoldo Mandic School of Dentistry, Department of Restorative Dentistry, Campinas, SP, Brazil
| | - Fabiana Mantovani Gomes França
- Instituto de Pesquisas São Leopoldo Mandic, São Leopoldo Mandic School of Dentistry, Department of Restorative Dentistry, Campinas, SP, Brazil
| | - Roberta Tarkany Basting
- Instituto de Pesquisas São Leopoldo Mandic, São Leopoldo Mandic School of Dentistry, Department of Restorative Dentistry, Campinas, SP, Brazil
| | - Cecilia Pedroso Turssi
- Instituto de Pesquisas São Leopoldo Mandic, São Leopoldo Mandic School of Dentistry, Department of Restorative Dentistry, Campinas, SP, Brazil
| | | | - Flávia Lucisano Botelho Amaral
- Instituto de Pesquisas São Leopoldo Mandic, São Leopoldo Mandic School of Dentistry, Department of Restorative Dentistry, Campinas, SP, Brazil
| |
Collapse
|
6
|
Nogueira CHDP, Gelio MB, Besegato JF, Ramos ATPR, Fernández E, Kuga MC, Saad JRC. Effect of aging and cementation systems on the bond strength to root dentin after fiber post cementation. Braz Dent J 2023; 34:52-60. [PMID: 36888845 PMCID: PMC10027095 DOI: 10.1590/0103-6440202305082] [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: 06/10/2022] [Accepted: 12/07/2022] [Indexed: 03/08/2023] Open
Abstract
This study evaluated the effect of aging and cementation of fiber posts using glass ionomer and resin cements on push-out bond strength, failure mode, and resin tag formation. One hundred and twenty bovine incisors were used. After post-space preparation, the specimens were randomly allocated into 12 groups (n = 10) according to the cementation system used: GC - GC Gold Label Luting & Lining); RL - RelyX Luting 2; MC - MaxCem Elite; RU - RelyX U200 and the aging periods (24 hours, 6 months, and 12 months). Slices from the cervical, middle, and apical thirds were obtained and analyzed by push-out bond strength test and confocal laser scanning microscopy. One-way ANOVA and Tukey's post-hoc test was used at a significance level of 5%. For the push-out bond strength test, no differences among GC, RU, and MC in the cervical and middle thirds were observed, regardless of the period of storage (P > 0.05). In the apical third, GC and RU showed similar bond strength but higher than other groups (P > 0.05). After 12 months, GC showed the highest bond strength (P < 0.05). Bond strength to post-space dentin decreased over time, regardless of the cementation system used. Cohesive failure was the most frequent, regardless of the period of storage, cementation system, and post-space third. Tag formation was similar among all groups. After 12 months, GC showed the highest bond strength values.
Collapse
Affiliation(s)
- Caio Henrique de Paula Nogueira
- Department of Restorative Dentistry, School of Dentistry,
Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Mariana Bena Gelio
- Department of Restorative Dentistry, School of Dentistry,
Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - João Felipe Besegato
- Department of Restorative Dentistry, School of Dentistry,
Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Anna Thereza Peroba Rezende Ramos
- Department of Restorative Dentistry, School of Dentistry,
Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Eduardo Fernández
- Department of Restorative Dentistry, University of Chile, Santiago,
Chile
- Institute of Biomedical Sciences, Autonomous University of Chile,
Providencia, Chile
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry,
Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - José Roberto Cury Saad
- Department of Restorative Dentistry, School of Dentistry,
Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| |
Collapse
|
7
|
Paula LAMD, Reis LCDA, Miranda JS, Verner FS, Junqueira RB, Carvalho RFD. The effectiveness of EDTA 17% as a cleaning solution for the fiber post space after filling with cements. BRAZILIAN JOURNAL OF ORAL SCIENCES 2022. [DOI: 10.20396/bjos.v22i00.8666508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Aim: To evaluate the resistance of the union between a glass fiber post and radicular dentine after cleaning the root with 17% EDTA and filling with different endodontic cements. Methods: Forty uniradicular bovine incisors were removed to obtain root lengths of 18 mm. Endodontic treatment was performed on all roots using different filling cements (zinc oxide and eugenol-based, OZE; cement based on epoxy resin, AH) and cleaning solutions (saline, SA or EDTA), which made it possible to obtain four groups: OZESA, OZEEDTA, AHSA and AHEDTA. Subsequently, 12 mm of filling material was removed from the roots, and they were prepared to receive fiber posts luted with resin cement. To execute the mechanical cycles (2x106 cycles, 90 N, 4 Hz), coronal reconstruction was performed with a silicon matrix. The roots were then sliced (2-mm thick) to perform the push-out test. The results were analyzed using analysis of variance (one factor and two factors) and Tukey’s test (α=0,05). Results: Bond strength (Mpa) was significantly higher for OZEEDTA (9,18) and AHEDTA (8,70) than for OZESA (6,06) AHSA (8,7). OZEEDTA also presented the highest values in the cervical region (15,18) but was significantly lower in the apical region (2,99). However, AHEDTA had a homogeneous bond strength in all thirds. Conclusion: Regardless of the endodontic cement used, EDTA was used as an irrigating solution, culminating in a higher bond strength between the glass fiber post and dentin.
Collapse
|
8
|
Rosa E Silva VL, Silva FASD, Alves Dos Santos GN, Assis HCD, Souza-Gabriel AE, Silva-Sousa YTC, Lopes-Olhê FC, Sousa-Neto MD, Mazzi-Chaves JF. The impact of provisional intraradicular retainers cementation with temporary methacrylate-based resin in the bond strength of glass fiber posts to root dentin. J Mech Behav Biomed Mater 2022; 135:105486. [PMID: 36182677 DOI: 10.1016/j.jmbbm.2022.105486] [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: 08/18/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 11/15/2022]
Abstract
Chemical composition of temporary cements interferes in the bond strength and quality of the bond interface of glass fiber posts to root dentin. The aim of the present study was to evaluate the influence of different temporary cements on the bond strength of fiberglass posts and resin cement. Thirty-two maxillary central incisor roots were standardized at 15 mm length. The root canals were prepared with Reciproc R50 and filled with a R50 single cone and AH Plus. Ten mm of filling material was removed with a heated Schilder condenser, leaving 5 mm of apical filling material. The roots were randomly distributed into 4 groups (n = 8). In the control group, the root canal was prepared with a standard drill according to the post diameter (DC #1, FGM, Joinville, Brazil), irrigated with 5 mL of distilled water and immediately received the fiberglass post cemented with self-adhesive resin cement. For the other groups, cores were made with temporary intraradicular retainers cemented with different temporary cements: methacrylate-based resin (Bifix Temp - Voco), calcium hydroxide-based (Provicol - Voco) and zinc oxide-based - eugenol-free (Relyx Temp NE - 3M). After 7 days, mechanical removal of the temporary retainers, preparation, irrigation of the root canal and cementation of the fiberglass post were performed, following the same protocol that had been performed in the control group. The roots were sectioned to obtain 3 slices per root third. The most cervical section of each third was used for the push-out test and failure pattern analysis, while the most apical section was subjected to analysis of the adhesive interface by scanning electron microscopy (SEM). The BS data were compared between groups using the two-way ANOVA and Tukey post-test. The failure pattern results were expressed in percentage and compared between groups using the chi-square test and the material adaptation data at the bond interface were evaluated using the Kruskal-Wallis and Dwass-Steel-Critchlow-Fligner tests. The results showed higher BS in the cervical third, with a higher value in the control group (10.8 ± 0.94) and Bifix Temp group (9.78 ± 0.71), with no statistically significant difference between these groups (P > .05). The middle and apical thirds showed no statistically significant difference (P > .05). As regards the type of failure, a higher percentage of mixed adhesive failures was observed for all groups. Analysis of the adhesive interface by SEM showed that the temporary cement Bifix Temp showed greater adaptation at the bond interface. It was concluded that the methacrylate-based resin temporary cement showed the highest bond strength values and best adaptation to root dentin than the zinc oxide-based and calcium hydroxide-based temporary cements.
Collapse
Affiliation(s)
- Vinicius Leite Rosa E Silva
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Fábio Augusto Soares da Silva
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Guilherme Nilson Alves Dos Santos
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Helena Cristina de Assis
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Aline Evangelista Souza-Gabriel
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | | | - Fabiane Carneiro Lopes-Olhê
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Manoel D Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Jardel Francisco Mazzi-Chaves
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil.
| |
Collapse
|
9
|
Monteiro LC, Pecorari VGA, Gontijo IG, Marchi GM, Lima DANL, Aguiar FHB. PEEK and fiberglass intra-radicular posts: influence of resin cement and mechanical cycling on push-out bond strength. Clin Oral Investig 2022; 26:6907-6916. [PMID: 35881239 DOI: 10.1007/s00784-022-04645-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 07/12/2022] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To evaluate the bond strength of four types of posts (pre-fabricated fiberglass post, fiberglass post anatomized with composite resin, milled fiberglass post, and milled polyetheretherketone (PEEK) post), and two types of resin cements (conventional and self-adhesive) by assessing immediate bond strength and post-mechanical aging at each root third. MATERIALS AND METHODS Bovine endodontically treated roots (16 groups, n = 8) were prepared and the posts were produced and luted; the specimens of aging groups were cycled (300,000 cycles under 50 N load at 1.2 Hz frequency); six slices of each root were obtained; push-out test was performed by using a universal testing machine (500 N load at 1 mm/min cross speed); fracture pattern was classified into five levels. The statistical analyses used were three-way ANOVA, Tukey's test (for bond strength), and Fisher's test (for fracture pattern) (α < 0.05). RESULTS Differences were found between the cements for posts (conventional: p < 0.001; self-adhesive: p = 0.002), whereas no difference was found for root region (p = 0.941; p = 0.056, respectively); analysis of each root showed significant differences for cements (p < 0.001), posts (p < 0.001), and mechanical cycling (p = 0.001); in terms of double interaction, differences were found for posts and mechanical cycling (p = 0.005); no other interactions were observed (double or triple); the fracture pattern showed difference between the groups for both cements. CONCLUSIONS Milled PEEK posts seem to be a good clinical option, but they require improvement of CAD-CAM technology and advances towards their adhesion. CLINICAL RELEVANCE Milled posts are promising and can reduce clinical time for rehabilitation of extensively destroyed teeth.
Collapse
Affiliation(s)
- Lara Christie Monteiro
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Av. Limeira, 901, Bairro Areão13.414-093, Piracicaba, SP, Brazil.
| | | | - Isabela Guerra Gontijo
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Av. Limeira, 901, Bairro Areão13.414-093, Piracicaba, SP, Brazil
| | - Giselle Maria Marchi
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Av. Limeira, 901, Bairro Areão13.414-093, Piracicaba, SP, Brazil
| | - Débora Alves Nunes Leite Lima
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Av. Limeira, 901, Bairro Areão13.414-093, Piracicaba, SP, Brazil
| | - Flávio Henrique Baggio Aguiar
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Av. Limeira, 901, Bairro Areão13.414-093, Piracicaba, SP, Brazil
| |
Collapse
|
10
|
Finite element and in vitro study on biomechanical behavior of endodontically treated premolars restored with direct or indirect composite restorations. Sci Rep 2022; 12:12671. [PMID: 35879388 PMCID: PMC9314407 DOI: 10.1038/s41598-022-16480-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 07/11/2022] [Indexed: 11/08/2022] Open
Abstract
Objectives of the study were to investigate biomechanical properties of severely compromised premolars restored with composite restorations using finite element analysis (FEA), and in vitro fracture resistance test. A 3-D model of an endodontically treated premolar was created in Solidworks. Different composite restorations were modelled (direct restoration-DR; endo-crown-EC; post, core, and crown-C) with two different supporting tissues: periodontal ligament/alveolar bone (B), and polymethyl methacrylate (PMMA). Models were two-point axially loaded occlusally (850 N). Von Mises stresses and strains were calculated. The same groups were further tested for static fracture resistance in vitro (n = 5, 6.0 mm-diameter ball indenter, vertical load). Fracture resistance data were statistically analyzed (p < 0.050). The highest stresses and strains in all FEA models were observed on occlusal and vestibular cervical surfaces, corresponding to fracture propagation demonstrated in vitro. C showed the lowest stress in dentin, while EC showed lower stresses and strains in crown cement. B models demonstrated larger high stress areas in the root than PMMA models. No significant differences in fracture resistance (N) were observed between groups (DR: 747.7 ± 164.0, EC: 867.3 ± 108.1, C: 866.9 ± 126.3; p = 0.307). More conservative restorations seem a feasible alternative for endodontically treated premolars to conventional post-core-crown.
Collapse
|
11
|
Hallak AG, Caldas RA, Silva ID, Miranda ME, Brandt WC, Vitti RP. Stress distribution in restorations with glass fiber and polyetheretherketone intraradicular posts: An in silico analysis. Dent Mater J 2022; 41:376-381. [PMID: 35135940 DOI: 10.4012/dmj.2021-245] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study evaluated stresses generated at maxillary central incisor (21) root restored with lithium disilicate crown (LDC), and glass fiber (GFP) or polyetheretherketone (PEEK) post. 3D models created by computed tomographic image (i-CAT Cone Beam 3D Dental Imaging System) reproduced maxillary central incisor. Each model had prosthetic LDCs (2.0 mm thick) cemented to GFP or PEEK posts with dual resin cement. Different loads were applied to each model (cervical, incisal, axial, middle). At maximum principal stress, PEEK showed higher stress than GFP in all loads, but with qualitative similarity. At minimum principal stress, PEEK and GFP showed qualitative and quantitative similarities, except axial load. Maxillary central incisor restored with GFP or PEEK and LDC presented, in general, similar stress intensity and distribution for main occlusal loads. Only two of sixteen occlusal loads tested (cervical for maximum principal; axial for minimum principal) showed significant quantitative difference.
Collapse
|
12
|
Cayo-Rojas C, Santander-Rengifo F, Castillo-Andamayo D, Tay L, López-Gurreonero C, Cornejo-Pinto A, Cervantes-Ganoza L. Bond strength and failure mode of glass fiber posts with different surface treatments prior to silanization: An in vitro comparative study. J Int Soc Prev Community Dent 2022; 13:42-53. [PMID: 37153932 PMCID: PMC10155880 DOI: 10.4103/jispcd.jispcd_292_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 02/03/2022] [Accepted: 03/15/2022] [Indexed: 11/11/2022] Open
Abstract
Aim The use of chemical agents in the surface treatment of glass fiber posts can improve their bond strength to the root canal. The aim of this study was to assess the bond strength and failure mode of glass fiber posts that received different surface treatments prior to silanization. Materials and Methods In this cross-sectional and in vitro experimental study, 50 human lower premolar roots were randomly divided into five groups and subsequently prepared to receive the cementation of a fiberglass post prior to silanization. They were distributed as group 1 (with 24% hydrogen peroxide), group 2 (with 37% phosphoric acid), group 3 (with 1.23% acidulated phosphate fluoride for 2 minutes), group 4 (with 1.23% acidulated phosphate fluoride for 6 minutes), and group 5 (without pretreatment). After cementation, the roots were sectioned into two discs for each cervical, middle, and apical region. Bond strength was assessed using the push out technique. Adhesive, mixed, and cohesive failure modes were also assessed. For data analysis, ANOVA and Tukey's post hoc tests were used, as well as Pearson's chi-square test. A significance of P < 0.05 was considered in all statistical analyses. Results When comparing the bond strength of root regions, significant differences were obtained in groups pretreated with phosphoric acid (P = 0.018) and acidulated phosphate fluoride for 2 and 6 minutes (P = 0.001 and P = 0.000, respectively). Furthermore, significant differences were obtained between posts treated only with silane and those that received phosphoric acid pretreatment (P = 0.006) and acidulated phosphate fluoride for 6 minutes (P = 0.001). Significant association of mixed failure mode was observed with hydrogen peroxide (P = 0.014) and phosphoric acid (P = 0.006) pretreatments. Cohesive failure was significantly associated with acidulated phosphate fluoride pretreatment for 2 minutes (P = 0.032) and with posts that did not receive treatment prior to silanization (P = 0.000). Conclusion Posts treated only with silane and pretreated with hydrogen peroxide and acidulated phosphate fluoride for 2 minutes presented significantly higher bond strength with respect to those pretreated with phosphoric acid and acidulated phosphate fluoride for 6 minutes. However, acidulated phosphate fluoride for 2 minutes and silane were associated with a better bonding type.
Collapse
|
13
|
SCHOENHALS GDP, CHAVES LP, NAUFEL FS. Influence of customization and light-curing device on the bond strength of glass fiber posts - in vitro study. REVISTA DE ODONTOLOGIA DA UNESP 2022. [DOI: 10.1590/1807-2577.05821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Abstract Introduction Endodontically treated teeth are usually affected by extensive structure loss requiring the use of intraradicular posts to provide retention and restoration. Objective An in vitro assessment was performed on the bonding of glass fiber posts to the root dentin. Material and method Ninety (n = 10) single bovine roots were used in a 3 x 3 x 3 factorial study with subdivided plots: post customization varying the presence and type of resin (without customization, conventional resin, and Bulk Fill resin), light-curing device (Valo, Radii-Cal, Rainbow), and root third (cervical, middle, and apical). Result For the customization factor, Tukey’s test (5%) showed the superiority of the Bulk Fill (8.16 MPa) and Z350 (7.40 MPa) groups compared to the control group (4.92 MPa), without differing from each other. All light-curing devices differed, showing the superiority of Valo (9.36 MPa), Radii (6.96 MPa) as an intermediate, and the inferiority of Rainbow (4.17 MPa). The cervical root third (7.81 MPa) was superior, the apical third was inferior (5.80 MPa), and the middle third (6.88 MPa) was an intermediate without differing from the others. Conclusion The customization of glass fiber posts increases the bond strength to the root dentin, regardless of the resin used. There was a compromise in the apical third and when using light-curing devices with lower light intensity.
Collapse
|
14
|
Leandrin TP, Fernández E, Lima RO, Besegato JF, Escalante-Otárola WG, Kuga MC. Customized Fiber Post Improves the Bond Strength and Dentinal Penetrability of Resin Cementation System to Root Dentin. Oper Dent 2021; 47:E22-E34. [PMID: 34969119 DOI: 10.2341/20-117-l] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/02/2021] [Indexed: 11/23/2022]
Abstract
OBJECTIVE This study aimed to evaluate the effect of fiber post customization on the bond strength (24 hours and 6 months), resin cement thickness, and dentinal penetrability of Adper Scotchbond Multi-Purpose - RelyX ARC (AS-RA), RelyX U200 (R2), and Scotchbond Universal - RelyX Ultimate (SU-RU) cementation systems to root dentin from the cervical-, middle-, and apical-thirds of the post space. METHODS One hundred twenty bovine incisors were endodontically treated. After post space preparation, the roots were divided into six groups, according to the luting protocols (AS-RA, R2, SU- RU) and the type of fiber post [noncustomized post (NC) and customized post (C)]. Customization procedures were peformed using a resin composite (Z350 XT). 24 hours (n=60) or 6 months later (n=60), specimens from the cervical-, middle-, and apical-thirds of the post space were submitted to cementation system thickness measurement, bond strength evaluation, and dentinal penetrability analysis with Confocal Laser Scanning Microscopy (CLSM). Failure mode was classified as adhesive, cohesive, or mixed. Data were submitted to ANOVA and Tukey tests (α=0.05). RESULTS Cementation protocols with customized fiber posts presented the lowest cementation system thickness, regardless of the cementation system or post space-third (p<0.05), and the highest bond strength values (p<0.05), regardless of the third space (p>0.05), for both periods (24 hours or 6 months). The comparison of push-out bond strength values between 24 hours and 6 months showed a reduction in all groups for the cervical-third (p<0.05). For the middle-third, only noncustomized groups showed reduction (p<0.05). For the apical-third, no reduction was observed (p>0.05). CONCLUSIONS Anatomical customization favored both the bond strength of cements to dentin and the dentinal penetrability, but with lower cementation system thickness, regardless of cement composition and adhesive strategy.
Collapse
Affiliation(s)
- T P Leandrin
- Thais Piragine Leandrin, DDS, MSc, PhD, Restorative Dentistry Department, Araraquara Dental School, Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| | - E Fernández
- *Eduardo Fernández, DDS, PhD, Professor Titular, Universidad de Chile Facultad de Odontologia, Santiago, Chile and Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Providencia, Santiago, Chile
| | - R O Lima
- Reinaldo Oliveira Lima, DDS, MSc, PhD, Restorative Dentistry Department, Araraquara Dental School, Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| | - J F Besegato
- João Felipe Besegato, DDS, MSc, PhD, Restorative Dentistry Department, Araraquara Dental School, Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| | - W G Escalante-Otárola
- Wilfredo Gustavo Escalante-Otárola, DDS, MSc, PhD, NCCL Research Group, School of Dentistry, Faculty of Health Sciences, Jorge Basadre Grohmann National University-UNJBG, Tacna, Perú
| | - M C Kuga
- Milton Carlos Kuga, DDS, MSc, PhD, Restorative Dentistry Department, Araraquara Dental School, Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| |
Collapse
|
15
|
Duarte Santos Lopes L, da Silva Pedrosa M, Beatriz Melo Oliveira L, Maria da Silva Costa S, Aguiar Santos Nogueira Lima L, Lucisano Botelho do Amaral F. Push-out bond strength and failure mode of single adjustable and customized glass fiber posts. Saudi Dent J 2021; 33:917-922. [PMID: 34916764 PMCID: PMC8665234 DOI: 10.1016/j.sdentj.2021.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 05/14/2021] [Accepted: 09/06/2021] [Indexed: 11/28/2022] Open
Abstract
Purpose To evaluate the push-out bond strength (PBS) and failure mode of single adjustable (SAP) and customized (CP) posts cemented to root canal dentin using conventional (RelyX Ultimate) or self-adhesive (RelyX U200) dual-cure resin cements. Methods Herein, 40 bovine mandibular incisors were divided into four groups (n = 10): SAP cemented with RelyX Ultimate (SAP-UT), SAP cemented with RelyX U200 (SAP-U2), CP cemented with RelyX Ultimate (CP-UT), and CP cemented with RelyX U200 (CP-U2). PBS and failure modes were analyzed. Three-way repeated measures ANOVA test followed by Tukey’s test and Fisher–Freeman–Halton exact test were used for data analysis (α = 5%). Results The PBS values for SAP (p < .05) were higher than those for CP and were not influenced by the root third and resin cement (p > .05). When conventional resin cement was used, the SAP showed significant differences compared to CP (p < .05). When cemented with RelyX Ultimate, a higher prevalence of mixed and adhesive failures for SAP and CP, respectively, was observed (p < .05). For the self-adhesive resin cement, the failures were mostly adhesive (p < .05). Conclusion SAP showed better performance than CP. The root third and resin cements did not influence the PBS. The most prevalent failures were adhesive and mixed.
Collapse
Affiliation(s)
- Lívia Duarte Santos Lopes
- São Leopoldo Mandic Institute and Research Center, Campinas, São Paulo, Brazil.,Course of Dentistry, Centro Universitário UniFacid
- Wyden, Teresina, Piauí, Brazil
| | - Marlus da Silva Pedrosa
- Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | | | | | | | | |
Collapse
|
16
|
Surface modification of glass fiber-reinforced composite posts to enhance their bond strength to resin-matrix cements: an integrative review. Clin Oral Investig 2021; 26:95-107. [PMID: 34713360 DOI: 10.1007/s00784-021-04221-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 10/05/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Endodontically treated teeth usually can reveal an extensive loss of dental structure and require the use of intraradicular posts to provide adequate support and retention. Retention of the post depends on the surface treatment of the endodontic post itself and on the root canal dentin as well as on the type of resin-matrix cement. PURPOSE The main aim of this study was to conduct an integrative review on the influence of different surface treatment methods of glass fiber-reinfored resin composite (GFRC) posts on their push-out bond strength to resin-matrix cements in endodontically treated teeth rehabiliation. METHOD A literature search was performed on PubMed (via National Library of Medicine) regarding articles published within the last 10 years, using the following combination of search terms: "intracanal post" OR "endodontic post" OR "root canal post" OR "intraradicular post" OR "glass fiber" AND "resin cement" AND "adhesion" OR "bond strength" OR "shear bond strength" OR "push out". RESULTS Results from the selected studies recorded the highest push-out bond strength around 22.5 MPa) on GFRC posts to resin-matrix cements when the surfaces were pre-treated by grit-blasting with silicate followed by silane conditioning. However, high values of push-out bond strength (21.5 MPa) were also noticed for GFRC posts after etching with hydrogen peroxide followed by silance conditioning. Thus, the highest values of bond strength of endodontic posts to the resin-matrix cements were recorded when a combined physico-chemical approach was assessed. Non-treated surfaces showed the lowest bond strength values between 5 to and 9 MPa. Surface analyses of GFRC posts showed an increased roughness after grit-blasting or etching that promoted a mechanical interlocking of the adhesive and resin-matrix cements. CONCLUSION The combined treatment of glass fiber-reinforced resin composite post surfaces by physical and chemical methods can promote the increase in roughness and chemical functionalization of the surfaces prior to cementation., That results in a high mechanical interlocking of the resin-matrix cements and a stable retention of the teeth root intracanal posts. CLINICAL RELEVANCE Combining chemical and physical modification methods of surfaces can provide the most promising adhesion-enhancing pathways of GFRC posts to resin-matrix cements, that can decrease the risk of clinical failures by fracture and detachment of endodontic posts.
Collapse
|
17
|
Silva CF, Cabral LC, Navarro de Oliveira M, da Mota Martins V, Machado AC, Blumenberg C, Paranhos LR, Santos-Filho PCF. The influence of customization of glass fiber posts on fracture strength and failure pattern: A systematic review and meta-analysis of preclinical ex-vivo studies. J Mech Behav Biomed Mater 2021; 118:104433. [PMID: 33684707 DOI: 10.1016/j.jmbbm.2021.104433] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 02/22/2021] [Accepted: 02/26/2021] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To perform a systematic review of the literature focused to evaluate in vitro function of prefabricated fiber posts with and without customization by additional auxillary fiber posts and composite resin on the fracture strength of wide or enlarged canals and the failure pattern. METHODS Six databases were used as primary search sources (PubMed, Scopus, LILACS, SciELO, Science Direct, and Web of Science) and three databases (Open Grey, Open Thesis, and OATD) were used to partially capture the "grey literature". The research included laboratory studies that used human upper anterior teeth aiming to assess the fracture strength and failure pattern of different glass fiber post customizations by additional auxiliary fiber posts or composite resin. The search had no restriction of year, language, and publication status. The risk of bias of the studies was assessed from the criteria established in systematic reviews of laboratory studies. Standardized mean differences were calculated by comparing the mean fracture strengths of customized and non-customized posts. Pooled estimates were calculated by Glass' delta method using the random-effects model. Subtotal estimates were presented according to each type of relining procedure and an overall estimate was described considering all studies combined. RESULTS The search provided 2291 results, from which six met the eligibility criteria and were included in the qualitative assessment of the review. Only three studies presented a moderate risk of bias. The meta-analysis results showed that the use of auxiliary posts produced higher mean fracture strengths than non-customized posts (SMD = 2.21; 95%CI: 0.74; 3.68), and it was more effective than the use of composite resin to reline the posts. CONCLUSION Based on laboratories studies, even though has not been observed any difference to a statistically significant level on fracture strength and failure pattern of the customized and non-customized post, future studies should follow a standardized approach to implementation and reporting of data.
Collapse
Affiliation(s)
- Camila Ferreira Silva
- Post-graduate Program in Dentistry, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Luana Cardoso Cabral
- Post-graduate Program in Dentistry, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Murilo Navarro de Oliveira
- Post-graduate Program in Dentistry, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Victor da Mota Martins
- Post-graduate Program in Dentistry, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Alexandre Coelho Machado
- Department of Oral Health, Technical Health School, Federal University of Uberlândia, Uberlândia, Brazil
| | - Cauane Blumenberg
- Post-graduate Program in Epidemiology, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Luiz Renato Paranhos
- Department of Preventive and Community Dentistry, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil.
| | - Paulo César Freitas Santos-Filho
- Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| |
Collapse
|
18
|
Piccolli VM, Silvia Pfeifer C, Piovezan Fugolin AP, Pomini MC, de Paula Ramos RA, Consani RLX. Adhesive strength of fiberglass posts treated with thio-urethane-based experimental silanes. Eur Oral Res 2021; 55:60-66. [PMID: 34250471 PMCID: PMC8244938 DOI: 10.26650/eor.20210114] [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: 05/02/2020] [Revised: 08/17/2020] [Accepted: 10/21/2020] [Indexed: 11/24/2022] Open
Abstract
Purpose: The aim of this study was to evaluate the adhesive bond strength of fiberglass posts
treated with experimental silanes based on thio-urethane and submitted to thermo
and mechanical cycles. Materials and methods: Bovine roots were divided into six groups: RX-RU2 (RelyX CP + RelyX U200); PETMP-HDDI-RU2 (PETMP-HDDI + RelyX U200); PETMP-BDI-RU2 (PETMP-BDI + RelyX
U200); RX-RU (RelyX CP + RelyX Ultimate); PETMP-HDDI-RU (PETMP-HDDI + RelyX
Ultimate); PETMP-BDI-RU (PETMP-BDI + RelyX Ultimate). One slice from each root
third (n=10) was submitted to the push-out test and the values evaluated with R
Program statistical analysis, while the failure pattern assessed in percentage. Results: Among root thirds, RX-RU2 promoted greater strength at the cervical and apical
thirds; PETMP-HDDI-RU2 showed highest values at the three thirds; and PETMP-BDI-RU2 was strongest at the apical third. RX-RU presented higher strength at the
apical third, and PETMP-HDDI-RU and PETMP-BDI-RU had similar values at the three
thirds. In each root third, PETMP-HDDI-RU2 showed similar strength at all thirds,
and similar strength at the apical third was observed for other associations. Mixed
and adhesive failures predominated. Conclusion: Experimental silanes promoted different bond strength values in the adhesion of
fiberglass posts to the root thirds, with better results for PETMP-HDDI silane. The
root region did not influence the failure pattern and most slices showed mixed
(MCDP) or adhesive (ADP) failure.
Collapse
Affiliation(s)
| | - Carmem Silvia Pfeifer
- Oregon Health and Science University, School of Dentistry, Biomaterials and Biomechanics, USA
| | | | | | | | | |
Collapse
|
19
|
Zaniboni JF, Silva AM, Fernández E, de Melo Alencar C, Morais JMP, de Campos EA, Kuga MC. Temporary cement residues affect the bond strength and dentin penetration of self-adhesive resin cement in fiberglass post cementation. Microsc Res Tech 2021; 84:2351-2360. [PMID: 33960585 DOI: 10.1002/jemt.23789] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/25/2021] [Accepted: 04/10/2021] [Indexed: 11/09/2022]
Abstract
This study evaluated the persistence of eugenol-containing (PR, Provy) or eugenol-free (RT, Relyx Temp, and TB, Temp Bond) temporary cement residues and its effects on push-out bond strength and dentinal penetration of the self-adhesive resin cement (Relyx U200). Eighty human roots were endodontically treated and post space prepared. Fourty specimens were distributed in four groups (n = 10): Control (CO), without any clinical procedure, PR, RT, and TB, where a metallic post was cemented with one of the temporary cements. After metallic post removal, hemi sections post space were submitted to SEM analysis. Another specimens were distributed in similar groups, but fiberglass post was cemented using Relyx U200 cement and submitted to push-out bond strength and dentinal penetration cement analysis, in post space thirds. SEM analysis were evaluated by Kruskal-Wallis and Dunn tests, while bond strength and dentinal penetration were evaluated by ANOVA One-Way and Tukey test (p < .05). Only in apical thirds, PR, RT, and TB showed higher persistence of residues than CO. In bond strength, PR, RT, and TB showed lower values than CO, in all post space thirds (p < .05). But to dentinal penetration, PR, RT, and TB presented lower values than CO only in apical thirds (p < .05). There is the greatest persistence of temporary cement residues only in apical post space third, providing less dentinal penetration of the self-adhesive resinous cement. However, the previous use of temporary cements has negative effects on the bond strength cementation system, regardless of the third evaluated.
Collapse
Affiliation(s)
- Joissi Ferrari Zaniboni
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Aryvelto Miranda Silva
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Eduardo Fernández
- Department of Restorative Dentistry, Faculty of Dentistry, University of Chile, Santiago, Chile.,Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Santiago, Chile
| | - Cristiane de Melo Alencar
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Jéssika Mayhara Pereira Morais
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Edson Alves de Campos
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| |
Collapse
|
20
|
Pereira R, Lins RBE, Rodrigues VC, Lima DANL, Martins LRM, Aguiar FHB. Glass fiber posts. BRAZILIAN JOURNAL OF ORAL SCIENCES 2020. [DOI: 10.20396/bjos.v19i0.8657508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Aim: Glass fiber posts are indicated in the rehabilitation of extensively damaged teeth; their cementation represents a critical step in restorative dentistry. The aim of this study was to quantify and compare the push-out bond strength of glass fiber posts cemented by conventional technique, two-step technique with luting agent and two-step technique associating bulk-fill composite and luting agent. Methods: Eighty maxillary bovine incisors were endodontically treated and divided into eight groups (n = 10) according to the luting agent (Rely X ARC and Duo-link) and cementation technique (conventional technique; two-step technique with luting agent; and two-step technique associating bulk-fill composite – Filtek Bulk-fill flow or Surefil SDR flow – and luting agent). Samples were submitted to pushout bond strength test, and the fracture pattern was evaluated through scanning electron microscope. Data were submitted to two-way ANOVA and Tukey’s test (α = 0.05). Results: When Rely X ARC was used, the conventional cementation technique obtained higher bond strength values than the twostep technique associated with Filtek Bulk-fill flow. When Duolink was used, the two-step technique associated with Filtek Bulk-fill flow presented higher bond strength values than the conventional technique. The most prevalent fracture patterns were adhesive between luting agent and dentin, and adhesive between bulk-fill composite and dentin. Conclusion: Two-step cementation technique associated with bulk-fill composite may be promising depending on the luting agent used.
Collapse
|