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Lupita C, Bojoga DE, Del Vecchio A, Stoia DI, Grozav I, Miron MI, Todea DC. Photon-Induced Photo-Acoustic Streaming vs. Shock Wave-Enhanced Emission Photo-Acoustic Streaming-The Effect of Three Final Irrigation Protocols on the Bond Strength of an Individually Formed Fiber Post. Dent J (Basel) 2024; 12:237. [PMID: 39195081 DOI: 10.3390/dj12080237] [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: 06/08/2024] [Revised: 07/19/2024] [Accepted: 07/22/2024] [Indexed: 08/29/2024] Open
Abstract
(1) Background: This study aimed to evaluate how laser-activated irrigation (LAI) influences the retention of a fiber post when used before an endodontic filling, as well as after post space preparation. (2) Materials and Methods: Sixty freshly extracted human incisors were selected. The teeth were randomly assigned to three groups-CONVENTIONAL (CONV), PIPS or SWEEPS-and treated endodontically. Each group received irrigation with 1 × 5 mL EDTA (17%) and 3 × 5 mL NaOCl (5.25%). In the first group, the irrigants were not activated, while in the second and third group, LAI was adopted using PIPS and SWEEPS protocols (Lightwalker from Fotona, Ljubliana, Slovenia). After post space preparation, each group received the same irrigation protocol initially established. Sticky posts (everStick Post, GC AUSTRIA GmbH Swiss) were individually adapted to the corresponding post spaces and cemented using dual cure resin cement (Gradia Core, GC Austria GmbH Swiss). All specimens were vertically embedded into self-curing acrylate (Duracryl plus, Spofa Dent, Europe), and each was sectioned into three segments of type A and type B samples for debonding through push-out and pull-out tests. The results were statistically analyzed. (3) Results: The pull-out test showed the superiority of the SWEEPS group, with a mean fracture force of 133.0 ± 50.7 N, followed by the PIPS group, with 102 N, with a lower standard deviation of ± 34.5 N. The CONV group registered the lowest fracture force. Concerning the push-out test, the SWEEPS group showed superior shear stress in comparison to the other two groups (13.45 ± 4.29 MPa); the CONV group was inferior, with shear tension values of 8.31 ± 4.67 MPa. (4) Conclusions: It can be stated that the SWEEPS and PIPS protocols resulted in considerably higher fiber post retention than the conventional method, whereas the SWEEPS protocol was superior to the PIPS protocol.
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Affiliation(s)
- Cassandra Lupita
- Department of Oral Rehabilitation and Dental Emergencies, Faculty of Dentistry, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania
- Interdisciplinary Research Center for Dental Medical Research, Lasers and Innovative Technologies, 300041 Timisoara, Romania
| | - Daliana Emanuela Bojoga
- Department of Oral Rehabilitation and Dental Emergencies, Faculty of Dentistry, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania
- Interdisciplinary Research Center for Dental Medical Research, Lasers and Innovative Technologies, 300041 Timisoara, Romania
| | - Alessandro Del Vecchio
- Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
| | - Dan Ioan Stoia
- Department of Mechanics and Strength of Materials, Faculty of Mechanical Engineering, Polytechnic University of Timisoara, 300222 Timisoara, Romania
| | - Ion Grozav
- Department of Mechanics and Strength of Materials, Faculty of Mechanical Engineering, Polytechnic University of Timisoara, 300222 Timisoara, Romania
| | - Mariana Ioana Miron
- Department of Oral Rehabilitation and Dental Emergencies, Faculty of Dentistry, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania
- Interdisciplinary Research Center for Dental Medical Research, Lasers and Innovative Technologies, 300041 Timisoara, Romania
| | - Darinca Carmen Todea
- Department of Oral Rehabilitation and Dental Emergencies, Faculty of Dentistry, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania
- Interdisciplinary Research Center for Dental Medical Research, Lasers and Innovative Technologies, 300041 Timisoara, Romania
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Dotto L, Girotto LPS, Correa Silva Sousa YT, Pereira GKR, Bacchi A, Sarkis-Onofre R. Factors influencing the clinical performance of the restoration of endodontically treated teeth: An assessment of systematic reviews of clinical studies. J Prosthet Dent 2024; 131:1043-1050. [PMID: 35527069 DOI: 10.1016/j.prosdent.2022.03.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/28/2022] [Accepted: 03/29/2022] [Indexed: 10/18/2022]
Abstract
STATEMENT OF PROBLEM How best to restore endodontically treated teeth is still unclear because many types of material and techniques are involved. PURPOSE The purpose of this overview of systematic reviews of clinical studies was to assess the available evidence-based literature on the influence of associated clinical factors on the clinical performance (survival, failure rate, or success) of restored endodontically treated teeth. MATERIAL AND METHODS PubMed, Scopus, and Web of Science were searched from inception until September 27, 2021, to identify systematic reviews. Two reviewers independently screened titles, abstracts, and full-text articles, and each reviewer extracted the data of half of the included studies. A single reviewer with an independent verifier completed the quality appraisal. A descriptive analysis of the collected data was made. RESULTS A total of 36 systematic reviews fulfilled the inclusion criteria. The factors most assessed were the type of coronal restorative technique (n=22) and type of post (n=22). The results indicated that metal and fiber posts seem to present similar clinical performance, 1-piece endodontic crowns could be a suitable restorative option, there is no evidence to confirm whether single crowns are better or worse than direct restoration, the maintenance of the coronal structure is a fundamental factor, and the ferrule effect is still a controversial topic. Most of the studies (n=30, 81%) presented a final Grading of Recommendations, Assessment, Development and Evaluations (GRADE) rating of "critically low." CONCLUSIONS The post type does not appear to influence the clinical performance of restored endodontically treated teeth. However, conclusive evidence to suggest how different materials or techniques for restoring coronal tooth structure affect the clinical performance of such restorations, as well as the impact of the ferrule effect, is still lacking.
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Affiliation(s)
- Lara Dotto
- PhD student, School of Dentistry, Regional Integrated University of Upper Uruguai and Missions (URI), Erechim, RS, Brazil; and Master Student, Graduate Program in Dentistry, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Luiza Paloma S Girotto
- Master Student, Graduate Program in Dentistry, Meridional Faculty (IMED), Passo Fundo, RS, Brazil
| | | | - Gabriel Kalil Rocha Pereira
- Associate Professor, Post-Graduate Program in Oral Sciences, Federal University of Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Ataís Bacchi
- Associate Professor, Post-Graduate Program in Dentistry, Paulo Picanço School of Dentistry, Fortaleza, CE, Brazil
| | - Rafael Sarkis-Onofre
- Associate Professor, Graduate Program in Dentistry, Meridional Faculty (IMED), Passo Fundo, RS, Brazil.
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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.
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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
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Tsintsadze N, Margvelashvili-Malament M, Natto ZS, Ferrari M. Comparing survival rates of endodontically treated teeth restored either with glass-fiber-reinforced or metal posts: A systematic review and meta-analyses. J Prosthet Dent 2024; 131:567-578. [PMID: 35430048 DOI: 10.1016/j.prosdent.2022.01.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 01/04/2022] [Accepted: 01/04/2022] [Indexed: 10/18/2022]
Abstract
STATEMENT OF PROBLEM When restoring endodontically treated teeth, a post system is indicated to retain a core. Clinicians can choose from different post materials and types. However, the literature is inconclusive on the long-term clinical performance of available post systems. PURPOSE The purpose of this systematic review and meta-analysis was to analyze the survival and failure rates of endodontically treated teeth restored either with glass-fiber-reinforced or metal posts. MATERIAL AND METHODS The research question was formulated by following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines by using the Population, Intervention, Comparison, Outcome, Study Type (PICOS) tool. Medline (PubMed), Embase, and Scopus searches complemented by manual search were performed for randomized controlled clinical trials with a follow-up of at least 2 years. Two independent authors performed screening and data extraction of the articles. Meta-analyses were performed with the RevMan software program. Homogeneity was checked by using chi2 and I2 tests, and random-effects meta-analyses were applied. Odds ratio and 95% confidence interval were calculated (α=.05). The publication bias was evaluated by using funnel plots and the Begg and Egger tests. RESULTS A total of 184 studies were retrieved through the electronic searches, and an additional 4 through the hand search. After title- and abstract-level exclusion, 23 studies remained for full-text analyses, of which 7 were selected for data extraction. Meta-analyses revealed an overall survival rate of 92.8% for endodontically treated teeth restored with glass-fiber-reinforced posts compared with 78.1% of those restored with metal posts. No statistically significant difference (P>.05) was found in the survival, success, or failure rates. CONCLUSIONS No statistically significant differences were found between the survival and failure rates of endodontically treated teeth restored either with glass-fiber-reinforced or metal posts. The overall survival rate was 92.8% for glass fiber posts and 78.1% for metal posts. Both are reliable materials when a significant amount of coronal tooth structure is missing and treatment with a post is indicated.
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Affiliation(s)
- Nino Tsintsadze
- PhD student, Department of Medical Biotechnologies, University of Siena, Policlinico Le Scotte, Viale Bracci, Siena, Italy.
| | | | - Zuhair S Natto
- Associate Professor, Department of Dental Public Health, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia; Adjunct Assistant Professor, Department of Periodontology, Tufts University School of Dental Medicine, Boston, Mass
| | - Marco Ferrari
- Chair and Full Professor, Department of Medical Biotechnologies, University of Siena, Policlinico Le Scotte, Viale Bracci, Siena, Italy
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Ghanem N, Ali H, Bahrli N, Hassan H. Clinical performance of custom-milled polyetherketoneketone (PEKK) posts and cores: A 12-month follow-up randomized controlled pilot study. Clin Exp Dent Res 2024; 10:e854. [PMID: 38433309 PMCID: PMC10909799 DOI: 10.1002/cre2.854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/12/2023] [Accepted: 01/26/2024] [Indexed: 03/05/2024] Open
Abstract
OBJECTIVES Comparing the survival rate and the cumulative success rates of custom-milled polyetherketone ketone posts and cores (MPP) with prefabricated fiber posts (PFP) in restoring compromised endodontically treated premolars. MATERIAL AND METHODS This was a randomized, double-blind, parallel, two-arm controlled pilot study. A total of 24 patients (12 males, 12 females), each had a compromised lower premolar, needed a root canal treatment and to be restored with post and core. Patients were randomly allocated into two groups, MPP-group: restored with MPP, and PFP-group: restored with PFP and composite cores. After that, premolars were restored with single porcelain fused to metal (PFM) crowns. Clinical and radiographic follow-ups were conducted after 3, 6, and 12 months. The Kaplan-Meier, log-Rank, and χ2 tests were used to investigate differences between the two groups at the 0.05 significance level. RESULTS The survival rate after 12 months in the MPP and PFP groups was 66.7% and 100%, respectively. Meanwhile, the cumulative success rates were 63.6% and 100% in the same order. The log-rank test showed a significant difference between the two groups (p = .031). The difference in cumulative success rates was also significant, as the χ2 test revealed (p = .011). CONCLUSION The PFP group showed a higher success rate than the MPP group and according to the failure types, PEKK posts seem to be inferior to PFP in terms of the mechanical properties and bonding to resin mechanism. TRIAL REGISTRATION ISRCTN, ISRCTN13456471. October, 14, 2019. (https://doi.org/10.1186/ISRCTN13456471ISRCTN13456471).
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Affiliation(s)
- Naif Ghanem
- Department of Fixed Prosthodontics, Faculty of DentistryTishreen UniversityLatakiaSyria
| | - Hasan Ali
- Department of Pediatric Dentistry, Faculty of DentistryTishreen UniversityLatakiaSyria
| | - Nasser Bahrli
- Department of Fixed Prosthodontics, Faculty of DentistryTishreen UniversityLatakiaSyria
| | - Hazem Hassan
- Department of Orthodontics, Faculty of DentistryTishreen UniversityLatakiaSyria
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Wu Y, Qi H, Zhang Y, Xie H. 'Gold' lost in restoration: Evaluation of core morphology of custom metal posts and cores, and analysis of precious metal debris. Heliyon 2024; 10:e24946. [PMID: 38312696 PMCID: PMC10835304 DOI: 10.1016/j.heliyon.2024.e24946] [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: 02/28/2023] [Revised: 01/16/2024] [Accepted: 01/17/2024] [Indexed: 02/06/2024] Open
Abstract
1 Objectives To investigate the deviations between the morphological dimensions of finished cores and desired dimensions made by three available fabricating techniques. To assess the precious metal loss in custom precious metal post and core restorative treatment in the dental clinic. 2 Methods Titanium posts and cores were fabricated using three different techniques: digital scanning impression technology, digital scanning wax-pattern technology, and the traditional lost-wax casting method. Geomagic Studio was used to fit the scanned model data to the digital design data of the expected preparation and to analyze the 3D deviations between the two. Precious metal debris from the precious metal post and core was collected, processed, weighed and analyzed for precious metal elements by energy-dispersive X-ray spectroscopy layered images. 3 Results In all 48 pairs of models, there were positive and negative deviations, with the largest mean positive deviation of (0.752 ± 0.037 mm) for models made by the semi-digital scanning wax-pattern technique. A total of 7001.3 mg of metals was recovered from the waste streams collected, which contained precious metals-mainly gold, silver, and platinum. 4 Conclusions There were discrepancies between the custom core and the expected preparation regardless of the fabrication process used. The digital scanning impression technology showed better dimensional rationality of crown cores. Custom precious metal posts and cores can have an average precious metal loss of 129.7 mg per case in the dental clinic.
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Affiliation(s)
- Yumin Wu
- Department of Prosthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Jiangsu Province Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, 210029, China
| | - Haowen Qi
- Department of Prosthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Jiangsu Province Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, 210029, China
| | - Yuhang Zhang
- Digital Center, The Affiliated Stomatological Hospital of Nanjing Medical University, Jiangsu Province Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, 210029, China
| | - Haifeng Xie
- Department of Prosthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Jiangsu Province Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, 210029, China
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Sippus JH, Stape THS, Tezvergil-Mutluay A. Evaluation of Er:YAG and Er,Cr:YSGG lasers on intraradicular bonding using modified glass fiber tips. Dent Mater J 2023; 42:766-773. [PMID: 37730380 DOI: 10.4012/dmj.2023-025] [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: 09/22/2023]
Abstract
The aim of this study was to determine whether erbium laser irradiation emitted by modified glass-fiber tips would improve the intraradicular bonding of fiber posts. Forty human canines were endodontically treated and prepared for fiber-post placement. Roots were divided into five groups (n=8); according to the laser-tip combinations (2,940 nm Er:YAG and 2,780 nm Er,Cr:YSGG). Non-irradiated root canals served as control. Posts were cemented with self-adhesive resin cement and subjected to push-out test. Failure modes were characterized, and intraradicular bonded interfaces were analyzed by SEM and submitted to nanoleakage evaluation. Data were analyzed by two-way ANOVA and Tukey test (α=0.05). No significant differences were observed in cervical and middle sections (p>0.05), while significantly higher bond strengths were observed in apical sections (p<0.05). Laser irradiation reduced adhesive failures, cement-dentin gap formation, and nanoleakage apically. Laser-irradiation protocols employing end- or radial-firing tips improved bonding to apical intraradicular dentin contributing to more uniform bonded interfaces.
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Affiliation(s)
- Jaana Hannele Sippus
- Finnish Doctoral Program in Oral Sciences (FINDOS), University of Turku, Institute of Dentistry
- Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku
| | - Thiago Henrique Scarabello Stape
- Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku
| | - Arzu Tezvergil-Mutluay
- Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku
- Turku University Hospital, TYKS, University of Turku
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Vogler JAH, Stummer AL, Walther KA, Wöstmann B, Rehmann P. Survival of teeth treated with post and core - A retrospective study of more than 1000 cases with observation periods up to 18 years. J Dent 2023; 138:104723. [PMID: 37742809 DOI: 10.1016/j.jdent.2023.104723] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/11/2023] [Accepted: 09/21/2023] [Indexed: 09/26/2023] Open
Abstract
OBJECTIVES Even if survival of post and core (PC) itself was frequently investigated in recent literature, clinical data concerning the risk for extraction of teeth restored with PC is still scarce. Since most authors found the loss of retention of refitable post and cores as the most common cause of failure, it is impossible to draw a conclusion on tooth survival on the results of those studies. Therefore, the aim of the present study was to improve the clinical evidence on the survival of teeth treated with post and cores on a large number of cases over a long observation period. MATERIALS AND METHODS 735 patients were treated with 1053 post and cores in the observation period (2004-2022) and could be included in the study. The patient files were analysed due to the parameters: Type of covering prosthetic restoration, location, type of tooth, luting material, post and core material, bone attachment and therapist. The survival probability was assessed using Kaplan-Meyer analysis. Cox regression was used to assess possible multifactorial influences. RESULTS The overall average survival time until necessary extraction of a tooth restored with a post and core was 11.74 years. A root fracture in primary crown retained removeable partial dentures (RPDs) during the first five years was the most common reason for extraction in this study. A significant influence on the survival time of teeth restored with post and cores was found for the type of covering restoration, bone attachment, age of the patient and post and core material. CONCLUSIONS Post and core restored teeth should be avoided as abutments for primary crown retained RPDs. CLINICAL SIGNIFICANCE If it is inevitable to utilise post and core restored teeth for primary crown retained RPDs, post and core materials with matching mechanical properties to that of dentine should be preferred.
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Affiliation(s)
- Jonas Adrian Helmut Vogler
- Dental Clinic - Department of Prosthodontics, Justus Liebig University, Schlangenzahl 14, Giessen 35392, Germany.
| | - Anna-Lena Stummer
- Dental Clinic - Department of Prosthodontics, Justus Liebig University, Schlangenzahl 14, Giessen 35392, Germany
| | - Kay-Arne Walther
- Dental Clinic - Department of Prosthodontics, Justus Liebig University, Schlangenzahl 14, Giessen 35392, Germany
| | - Bernd Wöstmann
- Dental Clinic - Department of Prosthodontics, Justus Liebig University, Schlangenzahl 14, Giessen 35392, Germany
| | - Peter Rehmann
- Dental Clinic - Department of Prosthodontics, Justus Liebig University, Schlangenzahl 14, Giessen 35392, Germany
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Ribeiro MTH, Oliveira GD, Oliveira HLQD, Mendoza LCL, Melo CD, Silva Peres T, Soares CJ. Survival of severely compromised endodontically treated teeth restored with or without a fiber glass post. J Appl Oral Sci 2023; 31:e20230241. [PMID: 37909530 PMCID: PMC10609643 DOI: 10.1590/1678-7757-2023-0241] [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: 07/09/2023] [Accepted: 09/06/2023] [Indexed: 11/03/2023] Open
Abstract
OBJECTIVE The use of a fiber glass post (FGP) type and choice of FGP diameter to restore endodontically treated incisors without ferrule is controversial. This study evaluated survival rate and failure mode of severely compromised central incisors without ferrule rehabilitated using resin-based composite (RBC) with or without FGP with different diameters. METHODOLOGY A total of 60 decoronated bovine incisors without a ferrule were endodontically treated and prepared for 1.4, 1.6, and 1.8 mm diameter FGPs (Whitepost System DC 0.5, Fit 0.4, and DCE 0.5; FGM). Half of the teeth received FGPs cemented using dual-cure resin cement (Allcem Core; FGM), the other half were filled using only bulk-fill RBC (OPUS Bulk Fill; FGM). The crowns were directly restored with RBC. The roots were embedded in polystyrene resin and the periodontal ligament was simulated with polyether impression material. Fatigue testing was conducted under 5 Hz cyclic loading at 30 degrees to the incisal edge, beginning at 50 N (5,000 cycles) as a warmup. After, the load was increased 100 N every 15,000 cycles until fracture occurred. All specimens were subjected to transillumination, micro-CT analysis, and digital radiography before and after fatigue testing. Fracture mode was classified according to severity and repair potential. Data were analyzed with Kaplan-Meier survival test and post hoc log-rank test (α=0.05) for pairwise comparisons. RESULTS Using FGP significantly increased the number of cycles to failure, irrespective of FGP diameters (p=0.001). The FGP diameters had no statistically significant effect on cycles to failure or failure mode. CONCLUSION Using FGP without ferrule improved survival rate of structurally severely compromised central incisors compared with rehabilitation without FGP. The diameter of the FGPs had no effect on the survival rate and failure mode.
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Affiliation(s)
- Maria Tereza Hordones Ribeiro
- Universidade Federal de Uberlândia, Faculdade de Odontologia, Departamento de Dentística e Materiais Odontológicos, Uberlândia, Minas Gerais, Brasil
| | - Gabriella de Oliveira
- Universidade Federal de Uberlândia, Faculdade de Odontologia, Departamento de Dentística e Materiais Odontológicos, Uberlândia, Minas Gerais, Brasil
| | - Helena Letícia Quirino de Oliveira
- Universidade Federal de Uberlândia, Faculdade de Odontologia, Departamento de Dentística e Materiais Odontológicos, Uberlândia, Minas Gerais, Brasil
| | - Lilibeth Carola Leyton Mendoza
- Universidade Federal de Uberlândia, Faculdade de Odontologia, Departamento de Dentística e Materiais Odontológicos, Uberlândia, Minas Gerais, Brasil
| | - Calebe de Melo
- Universidade Federal de Uberlândia, Faculdade de Odontologia, Departamento de Dentística e Materiais Odontológicos, Uberlândia, Minas Gerais, Brasil
| | - Thiago Silva Peres
- Universidade Federal de Uberlândia, Faculdade de Odontologia, Departamento de Dentística e Materiais Odontológicos, Uberlândia, Minas Gerais, Brasil
| | - Carlos José Soares
- Universidade Federal de Uberlândia, Faculdade de Odontologia, Departamento de Dentística e Materiais Odontológicos, Uberlândia, Minas Gerais, Brasil
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Rakotoaridina K, Delrieu J, Pages P, Vergé T, Nasr K, Canceill T. Evaluation of Poly(etheretherketone) Post's Mechanical Strength in Comparison with Three Metal-Free Biomaterials: An In Vitro Study. Polymers (Basel) 2023; 15:3583. [PMID: 37688208 PMCID: PMC10489626 DOI: 10.3390/polym15173583] [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: 07/28/2023] [Revised: 08/26/2023] [Accepted: 08/27/2023] [Indexed: 09/10/2023] Open
Abstract
The thinking about metallic replacement has begun in a global context of reducing metallic alloys' use in odontology. Among the materials proposed for their replacement, poly(etheretherketone) may present interesting properties, especially in removable dentures' frames. The purpose of this study is to evaluate fracture resistance of PEEK posts-and-cores compared to non-metallic CAD/CAM materials and fiber glass posts. Forty extracted maxillary central incisors were prepared to receive posts. Samples were divided into four groups depending on whether they had been reconstructed with LuxaCam® PEEK, Enamic®, Numerys GF® or LuxaPost®. Samples were submitted to an oblique compressive test and results were statistically analyzed with ANOVA and Student's tests (or non-parametric tests depending on the conditions). Glass fiber posts and Numerys GF® reveal a significantly higher fracture resistance than LuxaCam® PEEK and Enamic®. No exclusively dental fracture has been noted for the Enamic group, which significantly distinguishes these samples from the three other groups. In our study, it appears that the conception of posts and cores with hybrid ceramic never conducts to a unique tooth fracture. By weighting the results according to the materials used, our data, obtained for the first time on this type of PEEK block, cannot confirm the possibility of using PEEK for inlay-core conception, excepted for specific cases when the material is considered in a patient presenting allergies or systemic disease contraindicating resin or metal.
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Affiliation(s)
- Kévin Rakotoaridina
- Département Odontologie, Faculté de Santé, Hôpitaux de Toulouse, Université Paul Sabatier, 3 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
| | - Julien Delrieu
- Département Odontologie, Faculté de Santé, Hôpitaux de Toulouse, Université Paul Sabatier, 3 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
| | - Paul Pages
- Département Odontologie, Faculté de Santé, Hôpitaux de Toulouse, Université Paul Sabatier, 3 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
| | - Thierry Vergé
- Département Odontologie, Faculté de Santé, Hôpitaux de Toulouse, Université Paul Sabatier, 3 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
| | - Karim Nasr
- Département Odontologie, Faculté de Santé, Hôpitaux de Toulouse, Université Paul Sabatier, 3 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
| | - Thibault Canceill
- Département Odontologie, Faculté de Santé, Hôpitaux de Toulouse, Université Paul Sabatier, 3 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
- CNRS UMR 5085, INPT, Faculté de Pharmacie, CIRIMAT, Université Toulouse III Paul Sabatier, 35 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
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11
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Hinz S, Bömicke W, Bensel T. Cumulative 10-year performance of endodontically treated teeth with prosthetic restorations of base metal alloy double crowns with friction pins-a retrospective study. Clin Oral Investig 2023; 27:4411-4423. [PMID: 37212841 PMCID: PMC10415510 DOI: 10.1007/s00784-023-05060-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Accepted: 05/02/2023] [Indexed: 05/23/2023]
Abstract
OBJECTIVES This 120-month follow-up study aimed to investigate the complication rate of abutment teeth after endodontic pretreatment with base metal alloy double crowns with friction pins. MATERIALS AND METHODS A total of 158 participants (n = 71, 44.9% women) aged 62.5 ± 12.7 years with 182 prostheses on 520 abutment teeth (n = 459, 88.3% vital) were retrospectively analyzed between 2006 and 2022. Of the endodontically treated abutment teeth, 6.9% (n = 36) were additionally treated with post and core reconstructions. Cumulative complication rates were calculated using the Kaplan-Meier estimator and log-rank test. In addition, Cox regression analysis was performed. RESULTS The cumulative complication rate at 120 months for the entire set of abutment teeth was 39.6% (confidence interval [CI]: 33.0-46.2). Endodontically treated abutment teeth (33.8%; CI: 19.6-48.0) were found to have a significantly higher cumulative fracture rate than vital teeth (19.9%; CI: 13.9-25.9, p < 0.001). Endodontically treated teeth restored with post and core reconstructions (30.4%; CI: 13.2-47.6) showed a nonsignificant lower cumulative fracture rate than that of teeth with root fillings only (41.6%; CI: 16.4-66.8, p = 0.463). CONCLUSIONS Higher 120-month cumulative fracture rates were observed in endodontically treated teeth. Comparable performance was observed in teeth with post and core reconstructions compared to teeth with root fillings only. CLINICAL RELEVANCE If endodontically treated teeth are used as abutments for double crowns, the risk of complications from these teeth should be considered when planning treatment and communicating with the patient.
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Affiliation(s)
- Sebastian Hinz
- Department of Prosthetic Dentistry, University School of Dental Medicine, Martin-Luther-University Halle-Wittenberg, Magdeburger Str. 16, 06112, Halle, Germany.
| | - Wolfgang Bömicke
- Department of Prosthetic Dentistry, University Hospital Heidelberg, University of Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
| | - Tobias Bensel
- Institute for Research in International Assistance, Akkon University for Human Sciences, Colditzstraße 34-36, 12099, Berlin, Germany
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12
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Sartoretto SC, Shibli JA, Javid K, Cotrim K, Canabarro A, Louro RS, Lowenstein A, Mourão CF, Moraschini V. Comparing the Long-Term Success Rates of Tooth Preservation and Dental Implants: A Critical Review. J Funct Biomater 2023; 14:142. [PMID: 36976066 PMCID: PMC10055991 DOI: 10.3390/jfb14030142] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 02/23/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
Implant therapy is considered a predictable, safe, and reliable rehabilitation method for edentulous patients in most clinical scenarios. Thus, there is a growing trend in the indications for implants, which seems attributable not only to their clinical success but also to arguments such as a more "simplified approach" based on convenience or the belief that dental implants are as good as natural teeth. Therefore, the objective of this critical literature review of observational studies was to discuss the evidence concerning the long-term survival rates and treatment outcomes, comparing endodontically or periodontally treated teeth with dental implants. Altogether, the evidence suggests that the decision between keeping a tooth or replacing it with an implant should carefully consider the condition of the tooth (e.g., amount of remaining tooth and degree of attachment loss and mobility), systemic disorders, and patient preference. Although observational studies revealed high success rates and long-term survival of dental implants, failures and complications are common. For this reason, attempts should be made to first save maintainable teeth over the long-term, instead of immediately replacing teeth with dental implants.
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Affiliation(s)
- Suelen Cristina Sartoretto
- Department of Oral Surgery, School of Dentistry, Fluminense Federal University, Niterói 24020-140, Brazil
| | - Jamil Awad Shibli
- Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, São Paulo 07023-070, Brazil
| | - Kayvon Javid
- Department of Oral Surgery, School of Dentistry, Fluminense Federal University, Niterói 24020-140, Brazil
| | - Khalila Cotrim
- Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, São Paulo 07023-070, Brazil
| | - Antonio Canabarro
- Department of Periodontology, Dental Research Division, School of Dentistry, Veiga de Almeida University, Rio de Janeiro 20271-020, Brazil
- Division of Periodontology, School of Dentistry, Rio de Janeiro State University, Rio de Janeiro 20551-030, Brazil
| | - Rafael Seabra Louro
- Department of Oral Surgery, School of Dentistry, Fluminense Federal University, Niterói 24020-140, Brazil
| | - Adam Lowenstein
- Department of Periodontology, Division Dental Research Administration, Tufts University School of Dental Medicine, Boston, MA 02111, USA
| | - Carlos Fernando Mourão
- Department of Periodontology, Division Dental Research Administration, Tufts University School of Dental Medicine, Boston, MA 02111, USA
| | - Vittorio Moraschini
- Department of Oral Surgery, School of Dentistry, Fluminense Federal University, Niterói 24020-140, Brazil
- Department of Periodontology, Dental Research Division, School of Dentistry, Veiga de Almeida University, Rio de Janeiro 20271-020, Brazil
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13
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Machry RV, Bergoli CD, Schwantz JK, Brondani LP, Pereira-Cenci T, Pereira GKR, Valandro LF. Longevity of metal-ceramic single crowns cemented onto resin composite prosthetic cores with self-adhesive resin cement: an update of a prospective analysis with up to 106 months of follow-up. Clin Oral Investig 2023; 27:1071-1078. [PMID: 36030454 DOI: 10.1007/s00784-022-04693-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 08/18/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To evaluate the longevity of metal-ceramic single crowns cemented onto resin composite prosthetic cores using a self-adhesive resin cement in a prospective clinical descriptive study. METHODS A total of 152 teeth were endodontically treated and received resin composite prosthetic cores and metal-ceramic crowns cemented with a self-adhesive resin cement. The patients included in the sample were recalled for clinical and radiography evaluation in an up-to-106-month period after the final cementation procedures, with an average of 62 months of follow-up. 91.5% of the sample (142 teeth) were evaluated regarding the treatment survival rate, analyzed considering the loss of crown retention (crown debonding) and tooth loss as the primary outcome. In addition, post debonding, and root fracture occurrences were also recorded as secondary outcomes to evaluate the success rate of the prosthetic treatment. The aesthetic parameters were also evaluated according to the FDI criteria. The Kaplan-Meier method and Cox regression with 95% confidence interval were applied for the statistical analysis. RESULTS Regarding the primary outcome, the metal-ceramic crowns cemented with self-adhesive resin cement presented a high survival rate (91.5%), with 8 crown debondings and 3 tooth losses (1 due to caries and 2 due to periodontal disease) occurring after the evaluation period. For secondary outcomes, 9 root fractures and 4 post debondings occurred, generating a success rate of 72%. All crowns had a score 1 on the FDI criteria, indicating that they were clinically excellent or very good regarding the aesthetic parameters. CONCLUSION The metal-ceramic crowns luted with a self-adhesive resin cement presented a survival rate of 91.5% after an average of 62 months of follow-up. Furthermore, the restorations remained aesthetically satisfactory over time, without changes that would indicate prosthetic retreatment. A success rate of 72% was obtained considering the secondary outcome, mainly related to intraradicular retainer failures (root fractures or post debonding). CLINICAL SIGNIFICANCE The self-adhesive resin cement is clinically indicated for cementation of metal-ceramic crowns onto resin composite prosthetic cores.
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Affiliation(s)
- Renan Vaz Machry
- Post-Graduate Program in Oral Science, School of Dentistry, Federal University of Santa Maria, UFSM Campus, 1000 Roraima Av., T Street, Building 26F, Room 2386, Santa Maria, Rio Grande Do Sul State, 97105-900, Brazil
| | - César Dalmolin Bergoli
- Post-Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Gonçalves Chaves Street 457, Pelotas, Rio Grande Do Sul State, 96015-560, Brazil
| | - Julia Kaster Schwantz
- Post-Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Gonçalves Chaves Street 457, Pelotas, Rio Grande Do Sul State, 96015-560, Brazil
| | - Lucas Pradebon Brondani
- Post-Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Gonçalves Chaves Street 457, Pelotas, Rio Grande Do Sul State, 96015-560, Brazil
| | - Tatiana Pereira-Cenci
- Post-Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Gonçalves Chaves Street 457, Pelotas, Rio Grande Do Sul State, 96015-560, Brazil
| | - Gabriel Kalil Rocha Pereira
- Post-Graduate Program in Oral Science, School of Dentistry, Federal University of Santa Maria, UFSM Campus, 1000 Roraima Av., T Street, Building 26F, Room 2386, Santa Maria, Rio Grande Do Sul State, 97105-900, Brazil
| | - Luiz Felipe Valandro
- Post-Graduate Program in Oral Science, School of Dentistry, Federal University of Santa Maria, UFSM Campus, 1000 Roraima Av., T Street, Building 26F, Room 2386, Santa Maria, Rio Grande Do Sul State, 97105-900, Brazil.
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14
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Nagarkar S, Loguercio AD, Perdigão J. Evidence-based fact checking for selective procedures in restorative dentistry. Clin Oral Investig 2023; 27:475-488. [PMID: 36607490 DOI: 10.1007/s00784-022-04832-z] [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: 08/17/2022] [Accepted: 12/18/2022] [Indexed: 01/07/2023]
Abstract
OBJECTIVES Similar to other dental specialties, there are many clinical procedures in restorative dentistry that may or may not be supported by good evidence. Thus, the effectiveness of these procedures is uncertain. The aim of this paper is to reduce this knowledge gap by critically inspecting selective procedures in restorative dentistry and exploring if these well-established or widely advocated treatment modalities are necessary for improving treatment outcomes based on the best available evidence. MATERIALS AND METHODS A MEDLINE search was conducted to identify research on selective procedures while focusing on clinical trials and systematic reviews. Due to their practical relevance in the decision-making process, cost-effectiveness analyses were also included. RESULTS Mixed results were identified regarding the included interventions. Some procedures had adequate evidence supporting them while others were mostly based on beliefs. CONCLUSIONS A critical review of the available literature indicates that some common restorative procedures lack adequate support from high-quality research evidence. CLINICAL RELEVANCE This paper attempts to highlight the need to critically examine the scientific validity of traditional knowledge and techniques through the context of current research evidence. This will not only help generate consensus between educators, clinicians, and researchers regarding restorative procedures but will also lead to improved patient care and outcomes.
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Affiliation(s)
- Sanket Nagarkar
- Park Dental Group, Minneapolis, MN, USA.,Department of Restorative Sciences, University of Minnesota, Minneapolis, MN, USA
| | - Alessandro D Loguercio
- School of Dentistry, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Jorge Perdigão
- Division of Operative Dentistry, Department of Restorative Sciences, University of Minnesota, 515 SE Delaware St, 8-450 Moos Tower, Minneapolis, MN, 55455, USA.
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15
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Bergamo ETP, Lopes ACO, Campos TMB, Amorim PH, Costa F, Benalcázar Jalkh EB, Carvalho LFD, Zahoui A, Piza MMT, Gutierres E, Witek L, Bonfante EA. Probability of survival and failure mode of endodontically treated incisors without ferrule restored with CAD/CAM fiber-reinforced composite (FRC) post-cores. J Mech Behav Biomed Mater 2022; 136:105519. [PMID: 36279744 DOI: 10.1016/j.jmbbm.2022.105519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 10/04/2022] [Accepted: 10/06/2022] [Indexed: 11/06/2022]
Abstract
PURPOSE This study evaluated the probability of survival and failure mode of endodontically treated incisors without ferrule restored with CAD/CAM FRC post-cores. METHODS Root canals of bovine incisors were treated, leaving post preparations of ∼10 mm. Teeth were allocated into three groups: (i) cast metal post-core, (ii) FRC prefabricated post with a direct resin core build-up, and (iii) CAD/CAM FRC post-core. Posts and zirconia crowns were cemented using resin cement. Specimens were subjected to step-stress accelerated-life fatigue testing in water. Use level probability Weibull curves, probability of survival for a mission of 100,000 cycles at 25, 50, and 100 N, Weibull modulus, and characteristic strength were calculated and plotted. Failure mode was examined under a stereomicroscope. RESULTS Restored incisors demonstrated high probability of survival (93-100%) for missions estimated at 25 and 50 N, irrespective of post-core foundation. At 100 N, incisors restored with metal posts presented significantly higher probability of survival (99%) relative to CAD/CAM posts (79%), whereas FRC groups demonstrated no significant difference. Weibull analysis indicated no significant difference on the Weibull modulus (m = 3.38-5.92). Incisors reconstructed with metal post-cores (431 N) presented significantly higher characteristic strength relative to prefabricated (200 N) and CAD/CAM (202 N) FRC post-cores. While post fracture was the chief failure mode for prefabricated and CAD/CAM FRC post-cores, post and/or root fracture were the main event for metal post-cores. CONCLUSION Endodontically treated incisors without ferrule restored with CAD/CAM FRC post-cores presented promising probability of survival for loads compatible with anterior masticatory forces and favorable failure modes.
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Affiliation(s)
- Edmara T P Bergamo
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, 9-75 Octavio Pinheiro Brizolla, Bauru, SP, Brazil, 17012-901
| | - Adolfo C O Lopes
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, 9-75 Octavio Pinheiro Brizolla, Bauru, SP, Brazil, 17012-901
| | - Tiago M B Campos
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, 9-75 Octavio Pinheiro Brizolla, Bauru, SP, Brazil, 17012-901
| | - Pedro Henrique Amorim
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, 9-75 Octavio Pinheiro Brizolla, Bauru, SP, Brazil, 17012-901
| | - Fábio Costa
- dOne 3D, 2625 José Adolfo Bianco Molina, Ribeirão Preto, SP, 14024-210, Brazil
| | - Ernesto B Benalcázar Jalkh
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, 9-75 Octavio Pinheiro Brizolla, Bauru, SP, Brazil, 17012-901
| | - Laura F de Carvalho
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, 9-75 Octavio Pinheiro Brizolla, Bauru, SP, Brazil, 17012-901.
| | - Abbas Zahoui
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, 9-75 Octavio Pinheiro Brizolla, Bauru, SP, Brazil, 17012-901
| | - Mariana M T Piza
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, 9-75 Octavio Pinheiro Brizolla, Bauru, SP, Brazil, 17012-901
| | - Eliezer Gutierres
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, 9-75 Octavio Pinheiro Brizolla, Bauru, SP, Brazil, 17012-901
| | - Lukasz Witek
- Department of Biomaterials, New York University College of Dentistry, NY, 10012, New York, USA; Department of Biomedical Engineering, New York University Tandon Scholl of Engineering, Brooklyn, USA
| | - Estevam A Bonfante
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, 9-75 Octavio Pinheiro Brizolla, Bauru, SP, Brazil, 17012-901
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16
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Ñaupari-Villasante R, Ocampo JB, Cardenas A, Muniz LP, Siqueira F, Moreira A, Feitosa VP, Loguercio AD. Effect of the Viscosity and Application Time of Different Phosphoric Acids on the Bond Strength and Nanoleakage of Fiber Posts to Root Dentin. Oper Dent 2022; 47:E253-E263. [PMID: 36322381 DOI: 10.2341/21-118-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: 03/18/2022] [Indexed: 02/28/2024]
Abstract
PURPOSE To evaluate the effect of application time and viscosity of meta-phosphoric acid (MPA) and ortho-phosphoric acid (OPA) on the push-out resin-dentin bond strength (PBS) and nanoleakage (NL) at the adhesive-root dentin interface. METHODS AND MATERIALS Ninety-six roots of premolars were endodontically prepared and randomly assigned into groups according to the (i) acid (OPA and MPA), (ii) viscosity (gel and liquid), and (iii) application time (7 and 15 seconds). Fiber posts were cemented to the roots, which were then transversally sectioned into serial slices. The slices (cervical, medium, and apical) were subjected to PBS or NL. Analysis of the dentin etching pattern was performed using scanning electron microscopy (SEM). The PBS (MPa) and NL (%) data were subjected to three-way repeated-measures analysis of variance (ANOVA) and Tukey's test (α=0.05). RESULTS The cross-product interaction was significant for both PBS and NL (p<0.001). No significant difference in the PBS was observed with the use of OPA compared to MPA (p>0.05). Higher PBS values were observed in the groups etched for 15 seconds compared to 7 seconds, regardless of the acid, viscosity, or root third (p<0.05). Lower NL was observed for MPA etching when compared to OPA etching (p<0.05), and these values were not affected by increasing the application time or acid viscosity (p>0.05). A more pronounced etching pattern was observed with OPA than MPA regardless of the acid viscosity. CONCLUSION The use of 40% meta-phosphoric acid promoted adequate bond strength without increasing dentin demineralization or void spaces in the hybrid layer.
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Affiliation(s)
- R Ñaupari-Villasante
- Romina Ñaupari-Villasante, DDS, MS student, Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - J B Ocampo
- Jessica B Ocampo, DDS, MS, Department of Restorative Dentistry, School of Dentistry, Santiago de Cali University, Cali, Colombia
| | - Afm Cardenas
- Andres Felipe M Cardenas, DDs, MS, PhD, Department of Postgraduate Program in Dentistry,CEUMA University, São Luís, Maranhão, Brazil
| | - L P Muniz
- Luana P Muniz, DDS, MS student, Department of Postgraduate Program in Dentistry, CEUMA University, Sáo Luis, Maranháo, Brazil
| | - Fsf Siqueira
- Fabiana SF Siqueira, DDs, MS, PhD, Department of Postgraduate Program in Dentistry, CEUMA University, Sáo Luís, Maranháo, Brazil
| | - Acl Moreira
- Ana Carolina L Moreira, DDS, MS student, Paulo Picanço School of Dentistry, Fortaleza, Ceará, Brazil
| | - V P Feitosa
- Victor P Feitosa, DDs, MS, PhD, Paulo Picanço School of Dentistry, Fortaleza, Ceará, Brazil
| | - A D Loguercio
- *Alessandro D Loguercio, DDS, MS, PhD, Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil
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17
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Habib SR, Ansari AS, Khan AS, Alamro NM, Alzaaqi MA, Alkhunefer YA, AlHelal AA, Alnassar TM, Alqahtani AS. Push-Out Bond Strength of Endodontic Posts Cemented to Extracted Teeth: An In-Vitro Evaluation. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6792. [PMID: 36234146 PMCID: PMC9572078 DOI: 10.3390/ma15196792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/25/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
(1) Background: An ideal bond strength between endodontic posts and root canal dentin is essential for optimal retention and good prognosis. This study aimed to evaluate the push-out bond strength (PBS) of prefabricated fiber and metal posts, luted with resin cement to natural dentin. (2) Methods: Extracted premolars with similar root dimensions were assigned into two groups of 30 each for the metal and fiber posts. Teeth were mounted in acrylic blocks exposing 2 mm of the coronal root. Teeth were subjected to endodontic treatment and post-space preparations. Two groups were further subdivided into three sub-groups (n = 10) according to the size of the posts (# 4, 5 and 6). Posts were cemented with resin cement. Specimens were sectioned into 4 mm slices and subjected to the PBS test. (3) Results: The mean PBS was similar for the metal and fiber posts bonded with resin cement, showing a statistically significant result. An increase in post size increased the bond strength initially, but a further increase in size did not show any marked difference. A total of 71.66% of tested specimens failed with the adhesive failure mode. (4) Conclusions: Metal posts showed slightly higher retention compared to the fiber posts, although the p-value was similar for both types. An increase in the size of posts showed increased retention. The most common mode of failure was adhesive failure between cement and dentin.
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Affiliation(s)
- Syed Rashid Habib
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Abdul Sadekh Ansari
- Dentistry Hospital, King Saud University Medical City, Riyadh 11545, Saudi Arabia
| | - Aleshba Saba Khan
- Department of Prosthodontics, Shahida Islam Dental College, Lodhran 59320, Pakistan
| | - Nawaf M. Alamro
- College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | | | | | - Abdulaziz A. AlHelal
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Talal M. Alnassar
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Abdulaziz S. Alqahtani
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
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18
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Influence of New Sleeve Composite on Fracture Behavior of Anterior Teeth with Flared Root Canals. Polymers (Basel) 2022; 14:polym14194073. [PMID: 36236020 PMCID: PMC9571556 DOI: 10.3390/polym14194073] [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: 08/08/2022] [Revised: 09/16/2022] [Accepted: 09/20/2022] [Indexed: 11/26/2022] Open
Abstract
We evaluated the fracture strength and failure mode of non-ferrule teeth with flared root canals that were restored using new experimental sleeve composites. Fifty endodontically treated anterior teeth with flared root canals were restored with direct restorations utilizing different techniques. Group A had teeth (non-ferrule) restored using commercialized MI glass fiber post + Gradia Core as core build-up. Group B had teeth (non-ferrule) restored with commercialized i-TFC glass fiber post + sleeve system. In Group C, the teeth (non-ferrule) were restored with an experimental sleeve composite with commercialized MI glass fiber post and Gradia Core. Group D, teeth (non-ferrule), were restored using custom-made tapered E-glass filling post and Gradia Core. Group E, teeth (with ferrule), were restored with commercialized MI glass fiber post + Gradia Core. After core construction, all specimens underwent direct composite crown restoration and were loaded until fracture using a universal testing machine. Average fracture loads were compared, and the failure modes were observed. Group C exhibited significantly greater fracture strength than other groups (p < 0.05). Favorable fracture teeth ratio of group C was more than that of the other groups. Thus, the new experimental sleeve composite could be clinically useful for core construction of non-ferrule teeth.
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19
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Ordinola-Zapata R, Lin F, Nagarkar S, Perdigão J. A critical analysis of research methods and experimental models to study the load capacity and clinical behavior of the root filled teeth. Int Endod J 2022; 55 Suppl 2:471-494. [PMID: 35263455 PMCID: PMC9314814 DOI: 10.1111/iej.13722] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 03/04/2022] [Indexed: 12/04/2022]
Abstract
The prognosis of root‐filled teeth depends not only on a successful root canal treatment but also on the restorative prognosis. This critical review discusses the advantages and limitations of various methodologies used to assess the load capacity or clinical survivability of root‐filled teeth and restorations. These methods include static loading, cyclic loading, finite element analysis and randomized clinical trials. In vitro research is valuable for preclinical screening of new dental materials or restorative modalities. It also can assist investigators or industry to decide whether further clinical trials are justified. It is important that these models present high precision and accuracy, be reproducible, and present adequate outcomes. Although in vitro models can reduce confounding by controlling important variables, the lack of clinical validation (accuracy) is a downside that has not been properly addressed. Most importantly, many in vitro studies did not explore the mechanisms of failure and their results are limited to rank different materials or treatment modalities according to the maximum load capacity. An extensive number of randomized clinical trials have also been published in the last years. These trials have provided valuable insight on the survivability of the root‐filled tooth answering numerous clinical questions. However, trials can also be affected by the selected outcome and by intrinsic and extrinsic biases. For example, selection bias, loss to follow‐up and confounding. In the clinical scenario, hypothesis‐based studies are preferred over observational and retrospective studies. It is recommended that hypothesis‐based studies minimize error and bias during the design phase.
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Affiliation(s)
- Ronald Ordinola-Zapata
- Division of Endodontics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Fei Lin
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, Beijing, 100081, China.,Minnesota Dental Research Center for Biomaterials and Biomechanics, School of Dentistry, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Sanket Nagarkar
- Park Dental Group, Minneapolis, Minnesota, and Clinical Research Assistant Professor (affiliated), Department of Restorative Sciences, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jorge Perdigão
- Division of Operative Dentistry, Department of Restorative Sciences, University of Minnesota, Minneapolis, Minnesota, USA
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20
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Penelas AG, da Silva EM, Fedozzi JM, Alves AC, Orem PRB, Poskus LT, Feitosa VP, Guimarães JGA. Glass fiber posts relining: can composite opacity influence retention to root canal dentin? Odontology 2022; 110:569-576. [PMID: 35230573 DOI: 10.1007/s10266-022-00693-w] [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: 08/17/2021] [Accepted: 02/04/2022] [Indexed: 11/28/2022]
Abstract
This study aimed at evaluating the influence of glass-fiber post (GFP) relining with composites of different opacities on resin cement layer thickness (CLT), bond strength (BS) to root dentin, and resin cement degree of conversion (DC%). Standardized roots of 52 bovine incisors had their canals prepared and were distributed into 4 groups (n = 10 for CLT and BS; n = 3 for DC%) according to the post used: WP3 (Control)-Whitepost DC3; groups DE, EN and TR-Whitepost DC0.5 relined, respectively, with dentin, enamel, and translucent shade composites. After cementation, specimens were sectioned into six 1.0 mm-thick discs that were submitted to push-out BS test. CLT and failure pattern were evaluated using a stereomicroscope and DC% by micro-Raman spectroscopy. Data were analyzed by two-way ANOVA and Tukey test (α = 0.05). The control group showed greater CLT than all relined groups (p < 0.05), which did not differ from each other (p > 0.05). Groups relined with low opacity composites (TR; EN) showed the highest BS and DC% means (p < 0.05). BS was not different among root thirds (p > 0.05), while DC% decreased from cervical to apical third (p < 0.05). Adhesive failures between cement and dentin were predominant, except for group DE with frequent mixed failures. It could be concluded that composite opacity did not influence CLT, which was thinner when GFP were relined and that relining GFP with lower opacity composites led to higher BS and DC%.
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Affiliation(s)
| | | | - Julia Mattos Fedozzi
- School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Amanda Cypriano Alves
- School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | | | - Laiza Tatiana Poskus
- School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
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21
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Pulido C, Gomes OM, Loguercio AD, Dávila-Sánchez A, Camilotti F, da Cruz GK, Arrais CAG. How the translucency of direct anatomic fiber posts affects the bond strength and microhardness of a self-adhesive luting agent in flared roots. Clin Oral Investig 2022; 26:4447-4456. [PMID: 35166941 DOI: 10.1007/s00784-022-04408-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 02/06/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVES To evaluate the influence of the composite resin translucency used in direct anatomic fiber posts on the bond strength (BS) and microhardness (VHN) of a luting agent into flared roots. MATERIALS AND METHODS The root canals of 70 single-rooted premolars were endodontically treated and prepared to simulate an oversized root canal. Prior to post cementation, composite resins with varying translucency (high translucent, HT; medium translucent, MT; high opacity, HO) were placed around the fiber posts to create anatomic fiber posts. The attenuation profile (%) of light passing either through the post or through the anatomic posts (n = 8) was obtained prior to the cementing procedures. A positive control group (PC) in which a prefabricated fiber post (PFP) with the diameter compatible with the root canal was cemented and a poorly adapted fiber post (negative control group, NC) were also evaluated. For both tests, the data were subjected to 2-way ANOVA and Bonferroni tests (α = 0.05). RESULTS A more severe light attenuation through the post at the cervical (P < .001) and medium (P < 0.001) thirds was noted when less translucent composite resin surrounded the anatomic post. HO groups showed lower BS (P = .009) and VHN (P < .001) values than the other groups, regardless of root third. No significant difference in BS values was noted between PC and HT groups. CONCLUSION The use of a more translucent composite resin in anatomic fiber posts increased the microhardness and bond strength of a dual polymerization self-adhesive RLA compared to the use of MT and HO composite. A well-adapted PFP showed the highest adhesive and mechanical behavior. CLINICAL RELEVANCE Clinicians should choose more translucent composite resins to create direct anatomic fiber posts to be cemented in flared root canals. That choice may allow improved mechanical properties of self-adhesive RLA and higher bond strength to the root canal as a consequence.
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Affiliation(s)
- Camilo Pulido
- Department of Restorative Dentistry, School of Dentistry, Diego de Robles Y Av. Interoceánica, Universidad San Francisco de Quito USFQ, Quito, Ecuador, 170901.
| | - Osnara Mongruel Gomes
- Department of Restorative Dentistry. School of Dentistry, State University of Ponta Grossa. Ponta Grossa, Paraná, Brazil
| | - Alessandro Dourado Loguercio
- Department of Restorative Dentistry. School of Dentistry, State University of Ponta Grossa. Ponta Grossa, Paraná, Brazil
| | - Andrés Dávila-Sánchez
- Department of Restorative Dentistry, School of Dentistry, Diego de Robles Y Av. Interoceánica, Universidad San Francisco de Quito USFQ, Quito, Ecuador, 170901
| | - Fernando Camilotti
- Department of Physics, State University of Ponta Grossa. Ponta Grossa, Paraná, Brazil
| | | | - Cesar Augusto Galvão Arrais
- Department of Restorative Dentistry. School of Dentistry, State University of Ponta Grossa. Ponta Grossa, Paraná, Brazil
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22
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Efficacy of CAD/CAM Glass Fiber Posts for the Restoration of Endodontically Treated Teeth. Int J Biomater 2022; 2022:8621835. [PMID: 35096068 PMCID: PMC8799365 DOI: 10.1155/2022/8621835] [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: 11/07/2021] [Accepted: 01/07/2022] [Indexed: 12/03/2022] Open
Abstract
Objective The aim of this systematic review was to provide an overview of available scientific evidence regarding the comparative efficacy of computer-aided design (CAD) and computer-aided manufacturing (CAM) glass fiber posts with prefabricated and metal cast posts for the restoration of endodontically treated teeth (ETT). Methods This systematic review was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Electronic and manual searches were performed using the PubMed, SciELO, Cochrane, ScienceDirect, Web of Science, and EBSCO databases. The reference lists of the selected papers were reviewed to identify relevant papers. There were no year restrictions, and eligible studies were those in English publications and describing in vitro studies evaluating intraradicular retainers (IRs) for (i) fracture resistance, (ii) bond strength, (iii) adaptation, and (iv) cement layer thickness. Literature reviews, systematic reviews, meta-analyses, case reports, in vitro studies with <8 specimens, and noncomparative trials involving prefabricated or metal cast posts were excluded. The authors of this review independently screened the search results, extracted data, and assessed the risk of bias. Results No significant differences were found in fracture resistance between prefabricated and CAD/CAM glass fiber posts or between CAD/CAM glass fiber and metal cast posts, although the latter demonstrated higher fracture resistance than the prefabricated glass fiber posts. Restoration with a full crown was not necessary to increase the fracture resistance in the presence of the ferrule effect. CAD/CAM glass fiber and metal cast posts had higher bond strength, lower nanoleakage, and better adaptation to the root canal. Conclusions Despite the heterogeneity of methodologies and results reported, the results of these studies indicated that the CAD/CAM glass fiber and metal cast posts showed greater efficacy in terms of fracture resistance, retention, and adaptation, compared to prefabricated glass fiber posts.
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23
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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.
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24
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Survival time of post and cores: A 16 year retrospective follow-up study. J Dent 2021; 117:103923. [PMID: 34953973 DOI: 10.1016/j.jdent.2021.103923] [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: 11/08/2021] [Revised: 12/06/2021] [Accepted: 12/09/2021] [Indexed: 01/21/2023] Open
Abstract
OBJECTIVES The retrospective survival study (1995-2004) by Balkenhol et al.[1] led to changes in the decision-making process for treatment with post and cores (special focus on the covering prosthetic restoration while deciding for treatment with post and cores, high primary friction at the try-in stage for conventional cementation, only indirect fabrication technique, no semi-precious alloy) in our clinic. The aim of this study was to examine the influence of these changes on the survival probability. MATERIALS AND METHODS In the observation period (2004-2020) 653 patients received in total 953 post and cores. The patient files were analysed due to the parameters: Type of covering prosthetic restoration, location, type of tooth, luting material, post and core material, bone attachment, therapist and cause of failure. According to the previous study the survival probability was assessed using Kaplan-Meyer analysis. Cox regression was used to assess the risk of failure and identify possible covariates. RESULTS The average survival time of the post and cores was 10.9 years. The cumulative failure rate was 28.2%. A significant influence on the survival time (Kaplan-Meyer analysis) could be found for the parameters: Type of covering prosthetic restoration, location, type of tooth, post and core material and bone attachment. The multifactorial survival analysis (Cox regression) showed a significant influence of the age of the patient at the time of fitting the post, the type of covering prosthetic restoration and the bone attachment. CONCLUSIONS The changes in the decision-making process did not lead to a better survival probability. CLINICAL SIGNIFICANCE The conclusions stated in the previous study were not strict enough. Treatments with post and cores should be critically scrutinized on the basis of covering prosthetic restoration and bone attachment. Post and cores under primary crown retained RPDs should be avoided because of the bad survival probability.
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25
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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.
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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
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26
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Oliveira CRDM, Reis ÉGJ, Tanomaru-Filho M, Reis JMDSN. Fracture strength of teeth with coronal destruction after core build-up restoration with bulk fill materials. J ESTHET RESTOR DENT 2021; 34:541-549. [PMID: 34766704 DOI: 10.1111/jerd.12833] [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: 06/16/2021] [Revised: 10/18/2021] [Accepted: 10/29/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVE This study aimed to evaluate the fracture strength and failure modes of different core techniques in teeth with simulated coronal destruction. MATERIALS AND METHODS Forty teeth were endodontically prepared and the specimens were divided into four experimental groups (n = 10) according to the core composition: Filtek One Bulk Fill-FOBF, Filtek Z350 XT-FZ350 (standard group), Filtek Bulk Fill Flow-FBFF, and LuxaCore Z-LCZ. CAD/CAM Monolithic zirconia crowns were obtained and cemented with RelyX U200. After storage in distilled water at 37°C for 48 h, the specimens were subjected to thermal cycling and to compressive strength mechanical tests. Statistical analyses (α = 0.05) were performed by non-parametric Kruskal-Wallis, Dunn post hoc, and Fisher's exact tests. RESULTS No significant differences (p > 0.05) were observed among FOBF, FZ350, and FBFF (mean ranks = 20.30, 12.20, and 23.20, respectively). LCZ (mean rank = 26.30) produced results similar to those of FOBF and FBFF (p > 0.05) and higher than those of FZ350 (p = 0.042). The most frequent type of failure was irreparable, regardless of the experimental condition. The lowest percentages of reparable fractures were produced by FOBF group (10%). CONCLUSIONS The use of bulk fill materials, including the "core-and-post" LCZ dual-cure resin composite, did not impair the fracture strength of endodontically treated teeth with coronal destruction. CLINICAL SIGNIFICANCE Resin composite bulk fill materials that can be used as a core-and-post cementation in an only stage are interesting, since they enable clinicians to work with one only material, and avoid several materials interfaces, technical sensitivity, and longer chair-time due to multistep procedures.
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Affiliation(s)
- Carlos Rangel de Moura Oliveira
- Department of Dental Materials and Prosthodontics, School of Dentistry, Sao Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Érica Gouveia Jorge Reis
- Private practice/Department of Restorative Dentistry, School of Dentistry, Sampaiodonto dental Clinic/Sao Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Mário Tanomaru-Filho
- Department of Restorative Dentistry, School of Dentistry, Sao Paulo State University - UNESP, Araraquara, SP, Brazil
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27
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Effect of Luting Cement Film Thickness on the Pull-Out Bond Strength of Endodontic Post Systems. Polymers (Basel) 2021; 13:polym13183082. [PMID: 34577984 PMCID: PMC8473238 DOI: 10.3390/polym13183082] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 08/29/2021] [Accepted: 09/02/2021] [Indexed: 02/06/2023] Open
Abstract
Optimal bond strength between the prefabricated post/dowel to the surrounding dentin is essential. The present study aimed to analyze and compare the effect of three different cement film thicknesses on the pull-out bond strength of three different prefabricated post systems. Extracted natural teeth (N = 90) with similar root dimensions were acquired. Teeth were mounted in resin blocks, endodontically treated, sectioned at cemento-enamel junction, divided into three groups (A: Parapost Fiber Lux plus; B: 3M ESPE Relyx fiber post; and C: Parapost XP), and stored. Uniform post spaces were prepared for the groups (A and C: Length = 8 mm, Width = 1.5 mm; B: Length = 8 mm, Width = 1.6 mm). Each group (N = 30) was further subdivided into three subgroups (n = 10) based on the size (4, 5, and 6) of the post and cemented with resin cement (MultiLink-N, Ivoclar Vivadent). After thermocycling, the specimens were subjected to a pull-out test using a universal testing machine, and tensile force was recorded (MPa). Digital microscopic evaluations were performed for modes of failure. ANOVA and Tukey-HSD tests were used for statistics. Significant differences were observed for each tested material (p = 0.000). The lowest and highest bond strength values were recorded for Group C (Titanium post) and Group A (000), respectively. Multiple comparisons showed significance (p < 0.05) among all the groups, except for space 1 and space 2 (p = 0.316) for Group A. Most of the failures occurred within the cement-dentin and post-cement interface (Adhesive failures, 73.5%). An increase in the luting cement film thickness results in the decrease in pull-out bond strength of prefabricated posts luted with resin cement, irrespective of the type/material/shape of the post. The serrated fiber posts showed the highest pull-out bond strength compared to the smooth surfaced fiber posts or serrated metal posts. Increased pull-out bond strengths were observed when appropriate post space was created with the same sized drill as the post size.
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28
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Khan AS, AlMaimouni YK, Benrashed MA, Alyousef NI, Siddiqui U, Ahmad N, Ateeq IS, Hakeem AS. A laboratory study to assess the physical, mechanical, and 3-D structural properties of nano-apatite grafted glass fibre-based endodontic posts. Int Endod J 2021; 54:2307-2320. [PMID: 34496045 DOI: 10.1111/iej.13630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 09/04/2021] [Accepted: 09/07/2021] [Indexed: 02/06/2023]
Abstract
AIM To fabricate and characterize nano-hydroxyapatite (nHA) grafted and non-grafted glass fibre-based endodontic posts. METHODOLOGY Experimental glass fibre posts were fabricated using silanized nHA grafted (ex-HA) and non-grafted glass fibre (ex-P) reinforced resins. The structural analysis and morphological patterns were analysed with Fourier transform infrared spectroscopy and scanning electron microscopy, respectively. EverStick® glass fibre posts (eS) were used as a control group. The degree of conversion, flexural strength, and flexural modulus was investigated and the fractured structure was evaluated with a scanning electron microscope. Root canals were prepared in human extracted teeth restored with experimental and control posts. The push-out bond strength was evaluated with radicular dentine at days 7, 30, and 90, and the presence of voids at the interface were measured at day 1, 7, 30, and 90 with micro-computed tomography. The Shapiro-Wilk test and one-way ANOVA post-hoc Tukey's test were performed. The level of significance was set at 0.05. RESULTS The SEM and FTIR confirmed the presence of a silane-coupling agent on the glass fibres. The ex-HA post had a significantly lower degree of conversion compared to the ex-P post (p = .0008), but a significantly higher conversion than the eS post (p = .0014). The maximum flexural strength value was obtained with the ex-HA post with an insignificant difference (p = .366) compared to ex-P post and a significant difference (p = .029) compared to the eS post. The flexural modulus of ex-HA, ex-P, and eS posts were significantly different (p = .037). Similarly, the ex-HA post had a significantly higher push-out bond strength at days 7 and 30 (p = .037) compared to the ex-P and eS posts. The volume of voids had a nonlinear behaviour amongst the groups with no significant difference between the posts. CONCLUSION The fabrication of the experimental posts was successful and the ex-HA post had greater flexural strength and push-out bond strength compared to the ex-P post. The degree of conversion of the ex-HA post was lower than the ex-P and eS posts. The volume of voids of ex-HA and ex-P posts was lower than that of eS posts.
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Affiliation(s)
- Abdul S Khan
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Yara K AlMaimouni
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Mashael A Benrashed
- Department of Biomedical Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Nujood I Alyousef
- Dental Department, Marat General Hospital, Ministry of Health, Riyadh, Saudi Arabia
| | - Usama Siddiqui
- Interdisciplinary Research Centre in Biomedical Materials, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan.,Department of Dental Materials, Rehman College of Dentistry, Peshawar, Pakistan
| | - Niyaz Ahmad
- Department of Pharmaceutics, College of Clinical Pharmacy, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Ijlal S Ateeq
- Biomedical Engineering Department, College of Engineering, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Abbas S Hakeem
- Interdisciplinary Research Center for Hydrogen & Energy Storage (IRC-HES), King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
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29
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Machry RV, Cadore-Rodrigues AC, Packaeser MG, Lorenzett E, Burgo TADL, Pereira GKR, Valandro LF. Influence of surface treatment of resin composite substrate on the load-bearing capacity under fatigue of lithium disilicate monolithic simplified restorations. J Mech Behav Biomed Mater 2021; 124:104792. [PMID: 34488172 DOI: 10.1016/j.jmbbm.2021.104792] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/20/2021] [Accepted: 08/22/2021] [Indexed: 10/20/2022]
Abstract
This study evaluated the influence of surface treatments of resin composite substrate on the fatigue behavior of adhesively cemented lithium disilicate glass-ceramic simplified restorations. CAD/CAM lithium disilicate ceramic blocks were shaped into discs (N = 60, Ø = 10 mm; thickness = 1.0 mm). Resin composite discs (N = 60, Ø = 10 mm, thickness = 2 mm) were allocated into four groups considering the "surface treatment" factor: Ctrl - no surface treatment; Bur - grinding with coarse diamond bur (#3101G, KG Sorensen); PA - etching with 37% phosphoric acid (15 s); AA - air abrasion with alumina particles (45 μm, 10 mm distance, 2.8 bars, 10 s). The surface topography, the roughness, the fractal dimension (estimated by the box-counting method) and the contact angle analyses were performed after the surface treatments. The lithium disilicate discs were etched (5% hydrofluoric acid, 20 s), silanized and adhesively cemented (Multilink N, Ivoclar Vivadent) on the resin composite discs. The samples (bonded restoration set) were subjected to a step-stress fatigue test at 20 Hz, 10,000 cycles/step with a step-size of 100 N applied on the ceramic surface, having ceramic up and resin composite down. Fractographic analysis was performed. The fatigue data (Fatigue Failure Load - FFL; and Cycles for Failure - CFF) were analyzed by Kaplan Meier with Mantel-Cox log-rank post-hoc tests (α = 0.05). No statistical difference for fatigue performance could be found among the groups (FFL means: 820-867 N; CFF means: 53,195-61,090 cycles). The bur group showed higher surface roughness and contact angle values. The PA group has the highest average fractal dimension. Therefore, the resin composite surface treatment induces topographical changes, however, it has no effect on the fatigue behavior of lithium disilicate restorations.
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Affiliation(s)
- Renan Vaz Machry
- Post-Graduate Program in Oral Science, Prosthodontic Unit, Faculty of Odontology, Federal University of Santa Maria, Brazil.
| | - Ana Carolina Cadore-Rodrigues
- Post-Graduate Program in Oral Science, Prosthodontic Unit, Faculty of Odontology, Federal University of Santa Maria, Brazil.
| | - Maria Gabriela Packaeser
- Post-Graduate Program in Oral Science, Prosthodontic Unit, Faculty of Odontology, Federal University of Santa Maria, Brazil.
| | - Ezequiel Lorenzett
- Post-Graduate Program in Physics, Physics Department, Federal University of Santa Maria, Brazil.
| | | | - Gabriel Kalil Rocha Pereira
- Post-Graduate Program in Oral Science, Prosthodontic Unit, Faculty of Odontology, Federal University of Santa Maria, Brazil.
| | - Luiz Felipe Valandro
- Post-Graduate Program in Oral Science, Prosthodontic Unit, Faculty of Odontology, Federal University of Santa Maria, Brazil.
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30
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Baldi A, Comba A, Michelotto Tempesta R, Carossa M, Pereira GKR, Valandro LF, Paolone G, Vichi A, Goracci C, Scotti N. External Marginal Gap Variation and Residual Fracture Resistance of Composite and Lithium-Silicate CAD/CAM Overlays after Cyclic Fatigue over Endodontically-Treated Molars. Polymers (Basel) 2021; 13:polym13173002. [PMID: 34503042 PMCID: PMC8434150 DOI: 10.3390/polym13173002] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 08/27/2021] [Accepted: 08/28/2021] [Indexed: 11/16/2022] Open
Abstract
The purpose of this in vitro study was to evaluate the external marginal gap variation with a 3D quantitative method and the residual fracture resistance after cyclic fatigue in endodontically treated molars restored with overlays of different materials, with and without fiber posts-supported buildups. Forty-eight human maxillary molars were selected, endodontically treated, prepared with standardized MOD cavities and randomly allocated into 6 study groups considering the "core strategy" (build-up with composite resin; build-up with composite resin supported by a fiber post); and the "restorative material" of the indirect adhesive overlay (GrandioBlocks, Voco; Cerasmart, GC; CeltraDuo, Dentsply). All procedures were executed according with manufacturers guidelines. Micro-CT analysis prior and after cyclic fatigue were executed, followed by scanning electron microscope analysis and fracture resistance test. The Two-Way ANOVA analysis showed that interfacial gap progression was significantly influenced by the "core strategy" (p < 0.01) but not of "restorative material" (p = 0.59). Concerning fracture resistance, "restorative material" was statistically significant (p < 0.01), while "core strategy" (p = 0.63) and the interaction (p = 0.84) were not. In conclusion, the fiber post presence within the build-up promoted a lower interfacial gap opening after fatigue, evaluated through micro-CT scans. In terms of fracture resistance, teeth restored with Cerasmart and Celtra Duo were statistically similar, but superior to GrandioBlocks.
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Affiliation(s)
- Andrea Baldi
- Department of Surgical Sciences, Dental School Lingotto, University of Turin, 10126 Turin, Italy; (A.B.); (A.C.); (R.M.T.); (M.C.)
| | - Allegra Comba
- Department of Surgical Sciences, Dental School Lingotto, University of Turin, 10126 Turin, Italy; (A.B.); (A.C.); (R.M.T.); (M.C.)
| | - Riccardo Michelotto Tempesta
- Department of Surgical Sciences, Dental School Lingotto, University of Turin, 10126 Turin, Italy; (A.B.); (A.C.); (R.M.T.); (M.C.)
| | - Massimo Carossa
- Department of Surgical Sciences, Dental School Lingotto, University of Turin, 10126 Turin, Italy; (A.B.); (A.C.); (R.M.T.); (M.C.)
| | - Gabriel Kalil Rocha Pereira
- Department of Restorative Dentistry, Division of Prosthodontics, Federal University of Santa Maria, Santa Maria 97105-900, Brazil; (G.K.R.P.); (L.F.V.)
| | - Luiz Felipe Valandro
- Department of Restorative Dentistry, Division of Prosthodontics, Federal University of Santa Maria, Santa Maria 97105-900, Brazil; (G.K.R.P.); (L.F.V.)
| | - Gaetano Paolone
- Department of Dentistry, IRCCS San Raffaele Hospital and Dental School, Vita Salute University, 20158 Milan, Italy;
| | - Alessandro Vichi
- Dental Academy, University of Portsmouth, William Beatty Building, Hampshire Terrace, Portsmouth PO1 2QG, UK;
| | - Cecilia Goracci
- Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy;
| | - Nicola Scotti
- Department of Surgical Sciences, Dental School Lingotto, University of Turin, 10126 Turin, Italy; (A.B.); (A.C.); (R.M.T.); (M.C.)
- Correspondence: ; Tel.: +39-340-2861-799
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Martins MD, Junqueira RB, de Carvalho RF, Lacerda MFLS, Faé DS, Lemos CAA. Is a fiber post better than a metal post for the restoration of endodontically treated teeth? A systematic review and meta-analysis. J Dent 2021; 112:103750. [PMID: 34274439 DOI: 10.1016/j.jdent.2021.103750] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 05/04/2021] [Accepted: 07/11/2021] [Indexed: 01/15/2023] Open
Abstract
OBJECTIVE To evaluate systematically the evidence about the failure rates of endodontically treated teeth (ETT) restored with intraradicular metal posts (MPs) or fiber posts (FPs). DATA The review protocol was registered on PROSPERO (CRD42020189792). Eligibility criteria included randomized clinical trials (RCT) and prospective clinical trials (PCT) that compared the failures between FP and MP restorations for ETT. Meta-analyses were conducted for failure rates using fixed- and random-effects models. Subgroup and funnel plot analyses were performed. SOURCES Four electronic databases (MEDLINE/PubMed, Web of Science, Scopus, and Cochrane Library), manual, and grey literature were screened by two researchers independently for articles published until November 2020 without language or time restrictions. For the analysis of the risk of bias, the Cochrane collaboration tool and ROBINS-I were used. The certainty of the evidence was evaluated using GRADE. STUDY SELECTION Ten studies were included. A total of 704 participants with a mean age of 42.7 years with a total of 844 ETT were restored using 453 FPs and 391 MPs. The FPs presented similar failures to that with MPs (P=0.39; risk ratio [RR]:0.82; 95% confidence interval [CI]: 0.52 to 1.29). Subgroup analysis showed no significant differences between the FPs and MPs for the anterior region (P=0.60; RR:0.88; [CI]: 0.54 to 1.42), posterior region (P=0.52; RR:1.18; [CI]: 0.71 to 1.98), root fracture (P=0.44; RR:0.78; [CI]: 0.41 to 1.49), and debonding (P=0.56; RR:1.27; [CI]: 0.57 to 2.80). Additionally, FP showed similar failures compared with those of cast (P=0.36; RR:0.63; [CI]: 0.23 to 1.72) and prefabricated MPs (P=0.68; RR:0.90; [CI]: 0.54 to 1.50). The RCT and PCT studies revealed a low risk of bias for most of the domains. However, the certainty of evidence was considered low. CONCLUSION No evidence of difference was observed for failure rates between FPs, and MPs, independent of region and different MPs used in ETT. However, further well-conducted clinical studies with high-quality evidence are encouraged. CLINICAL SIGNIFICANCE Our results indicate that both retainer posts can be considered an adequate alternative in restoring ETT. Therefore, the choice of post (fiber or metal) could be based on dentist preference or individual characteristics of the patient as the failure rates for different posts are similar.
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Affiliation(s)
- Marielle Dias Martins
- Department of Dentistry, Federal University of Juiz de Fora (UFJF), Campus Avançado Governador Valadares, Governador Valadares, Minas Gerais, Brazil
| | - Rafael Binato Junqueira
- Department of Dentistry, Federal University of Juiz de Fora (UFJF), Campus Avançado Governador Valadares, Governador Valadares, Minas Gerais, Brazil
| | - Rodrigo Furtado de Carvalho
- Department of Dentistry, Federal University of Juiz de Fora (UFJF), Campus Avançado Governador Valadares, Governador Valadares, Minas Gerais, Brazil
| | - Mariane Floriano Lopes Santos Lacerda
- Department of Dentistry, Federal University of Juiz de Fora (UFJF), Campus Avançado Governador Valadares, Governador Valadares, Minas Gerais, Brazil
| | - Daniele Sorgatto Faé
- Postgraduate Program in Applied Health Sciences (PPGCAS), Federal University of Juiz de Fora (UFJF), Campus Avançado Governador Valadares, Governador Valadares, Minas Gerais, Brazil
| | - Cleidiel Aparecido Araujo Lemos
- Department of Dentistry, Federal University of Juiz de Fora (UFJF), Campus Avançado Governador Valadares, Governador Valadares, Minas Gerais, Brazil.
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Gré CP, Lise DP, Ramos RQ, Van Meerbeck B, Vieira L, Lopes GC. Better Glass-fiber Post Preservation in Teeth with Ferrule When Subjected to Chewing. Oper Dent 2021; 46:419-427. [PMID: 34624104 DOI: 10.2341/20-186-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: 09/30/2020] [Indexed: 11/23/2022]
Abstract
OBJECTIVES To evaluate the influence of ferrule effect and mechanical fatigue aging on glass-fiber post push-out bond strength (PBS) to root-canal dentin at different root thirds of premolars. METHODS AND MATERIALS Thirty-two sound maxillary premolar teeth were collected, and randomly assigned to two experimental groups (n=16): 'Remaining Dentin Ferrule' (RDF) = coronal crown cut 2.0 mm above the cementoenamel junction (CEJ); 'Without Dentin Ferrule' (WDF) = coronal crown cut at the cemento-enamel junction. Teeth were endodontically treated, post spaces were prepared up to 10.0-mm depth from CEJ, and glass-fiber posts were cemented using a dual-cure self-adhesive composite cement. Standardized cores were built using a light-cure composite, upon which tooth cores were prepared using a 1.5-mm taper ogival-end diamond bur. Crowns were handmade using self-cure acrylic resin and cemented using the aforementioned composite cement. Half of the specimens were subjected to 1,200,000 cycles of mechanical fatigue in a chewing simulator (F = 'Fatigue'), while the other half were stored in distilled water at 37°C for 1 week (C = 'Control'). All specimens were horizontally sectioned into 1.0-mm thick slices prior to PBS test; the failure modes were assessed using stereomicroscopy and scanning electron microscopy (SEM). Data were analyzed for each root third using two-way analysis of variance (ANOVA) followed by Tukey HSD post-hoc test; frequency distribution was compared by Chi-square test (α=0.05) and post-hoc comparisons with Bonferroni. RESULTS The mean PBS in MPa (SD) were = RDF_F = 10.4 (2.9); WDF_F = 6.9 (1.7); RDF_C = 14.5 (2.7); WDF_C = 14.2 (2.9). Similar PBS were found for the root thirds. For all root thirds, significant differences were found for both the factors Dentin Ferrule and Fatigue, and their interaction (p<0.05). The lowest PBS was found for specimens without dentin ferrule subjected to chewing fatigue (p<0.001). Most failures occurred at the composite cement/dentin interface, followed by mixed and composite cement/glass-fiber post interfacial failures. There was a significant increase in mixed failures for the WDF_F group (p<0.001). CONCLUSION Absence of 2.0-mm remaining dentin ferrule in premolars resulted in a higher decrease of the glass-fiber posts' PBS to dentin after mechanical fatigue, irrespective of root third.
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Root canal pre-treatment and adhesive system affect bond strength durability of fiber posts ex vivo. Clin Oral Investig 2021; 25:6419-6434. [PMID: 34125299 PMCID: PMC8531046 DOI: 10.1007/s00784-021-03945-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 04/12/2021] [Indexed: 10/26/2022]
Abstract
OBJECTIVES To investigate the effect of different pre-treatments on the long-term bond strength of fiberglass posts luted either with dual-curing self-etch adhesives and core build-up composites or with a self-adhesive resin (SAR) cement. MATERIALS AND METHODS In total, 180 human root-filled teeth received post-space preparations and three different dentin pre-treatments (PTs): PT1, ethanol (99%); PT2, ethanol-tertiary-butanol-water-solution (AH Plus Cleaner, Dentsply Sirona; York, USA); and PT3, distilled water (control). Five luting systems were used: FU, Futurabond U (Voco; Cuxhaven, Germany); CL, Clearfil DC Bond (Kuraray Noritake; Okayama, Japan); GR, Gradia Core SE Bond (GC Europe NV; Leuven, Belgium); LU, LuxaBond Universal (DMG; Hamburg, Germany); and RX, RelyX Unicem 2 (3M; Minnesota, USA). Roots were cut into six slices (1 mm thick). From each root canal region, three slices were submitted to immediate and three to post-storage push-out testing. The latter were subjected to thermocycling (5-55°C, 6.000 cycles) and stored for six months in saline solution (0.9%, 37°C). Data were analysed using repeated measures ANOVA and chi-square tests (MV±SD). RESULTS Bond strength was significantly affected by material (p<0.0005), pre-treatment (p=0.016), and storage (p<0.0005; repeated-measures ANOVA). LU (18.8±8.1MPa) revealed significantly higher bond strength than RX (16.08±6.4MPa), GR (15.1±4.6MPa), CL (13.95±5.2MPa), and FU (13.7±6.3MPa). PT1 (16.5±6.9MPa) revealed significantly higher bond strength than PT3 (14.5±5.7MPa). CONCLUSIONS A universal adhesive in self-etch mode combined with a core build-up material revealed higher bond strength than a SAR cement, both interacted positively with Ethanol pre-treatment. CLINICAL RELEVANCE STATEMENT Ethanol (99%) rinsing can be recommended as part of post and core pre-treatment for the investigated luting systems.
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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.
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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
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Wahab FK, Mahasneh SA, Sawair FA, Hamdan MA, Hattar SN, AL-Rabab’ah MA. Restoration of Root Filled Teeth; Current Opinions and Techniques. Open Dent J 2021. [DOI: 10.2174/1874210602115010071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Purpose:
To examine current decision-making preferences of Jordanian dentists when Restoring Root Filled Teeth (RFT).
Materials and Methods:
834 Jordanian general dentists, prosthodontists and endodontists were invited to participate in a validated online survey with a 62% participation rate. Respondents were invited to answer 24 questions about their preferences for techniques and materials they use to restore RFT. The questions aimed at exploring restorative strategies commonly employed by Jordanian dentists when managing root filled teeth with extensive loss of tooth structure.
Results:
A minority of dentists consider direct resin restoration as the sole restoration for RFT with extensive loss of tooth structure. Full coverage metal-ceramic and all-ceramic crowns are more popular than endocrowns when restoring RFT with indirect restoration. Fiber posts are the most popular type of posts, followed by prefabricated metal posts. Glass ionomer is the most preferred cement for luting metal posts, while conventional dual resin cement with separate etch and rinse bonding strategy is the most employed when bonding fiber posts. The majority of dentists tend not to pretreat fiber posts. Loss of post/core retention or fracture of coronal tooth structure are the two most common reasons observed by dentists when RFT fail.
Conclusion:
Use of post and core is still preferred over more conservative approaches when restoring RFT with extensive loss of coronal tooth structure. Longevity of restorations can be enhanced by training practicing dentists on evidence-based adhesive strategies.
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Venkataraman KJ, Thanapathi S, Balasubramanian S, Gandhi SA, Sarojinikutty AC. Fracture Resistance of Titanium, Chrome-Cobalt, and Gold Alloy as Post and Core Materials: A Comparative Evaluation. J Pharm Bioallied Sci 2020; 12:S583-S588. [PMID: 33149525 PMCID: PMC7595494 DOI: 10.4103/jpbs.jpbs_205_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 03/10/2020] [Accepted: 03/31/2020] [Indexed: 11/26/2022] Open
Abstract
Aim: This study aimed to comparatively evaluate the fracture resistance of different metallic post and core materials. Materials and Methods: Twenty-four maxillary–central incisors were selected, standardized, and segregated into three groups (GP I–III) (n = 8) based on the type of alloy used for post and core preparation. GP I (gold alloy [Au]), GP II (chrome–cobalt alloy [Co–Cr]), and GP III (titanium alloy [Ti]) were comparatively evaluated for use as post and core materials. The teeth were endodontically treated and tooth preparation for post core was done.Metal post and cores were fabricated using indirect wax pattern and luted. Teeth were mounted on resin bases, fracture testing was done, and type of fractures were analyzed. Results: Mesiodistal type of fracture was the most common among experimental groups with a percentage incidence of 54.20%. The comminuted type of fracture was the next most common with a percentage incidence of 29.2%. The incidence of buccolingual, transverse, and other type of fracture was not common and had a percentage incidence of 29.2%, 4.2%, 8.3% and 4.2% respectively. Group II had the highest fracture resistance with a mean value of 742.89N. Group III and Group I had mean values of 482.33 and 361.1123N. Statistically significant difference between experimental groups (I and II) and (II and III) was observed in load values of root fracture (P < 0.05). Conclusion: On the basis of the protocols used and limitations of this study, among metallic post and core materials tested, GP II had the highest fracture resistance values. Further evaluation of these different post and core systems, new alloy formulations designed specifically for use as post and core materials, and assessment in a clinical setting is recommended.
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Affiliation(s)
| | - Sathya Thanapathi
- Department of Conservative Dentistry, JKK Nataraja Dental College & Hospital, Komarapalayam, Tamil Nadu, India
| | | | - Shrimanikandan Ayappa Gandhi
- Department of Craniofacial Surgery & Dentistry, Velammal Medical Hospital & Research Institute, Madurai, Tamil Nadu, India
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Girotto LPS, Dotto L, Pereira GKR, Bacchi A, Sarkis-Onofre R. Restorative preferences and choices of dentists and students for restoring endodontically treated teeth: A systematic review of survey studies. J Prosthet Dent 2020; 126:489-489.e5. [PMID: 32981715 DOI: 10.1016/j.prosdent.2020.07.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/22/2020] [Accepted: 07/22/2020] [Indexed: 12/17/2022]
Abstract
STATEMENT OF PROBLEM The best protocol to restore endodontically treated teeth is still unclear, with many factors to be considered, including the selection and necessity of a post, the type of coronal restoration, the amount of remaining coronal structure, and the type of luting agent. PURPOSE The purpose of this systematic review was to assess the restorative preferences for endodontically treated teeth between dentists and dental students. MATERIAL AND METHODS Survey studies, written in English, of dentists and dental students, which evaluated the use of intracanal posts and other restorative options for endodontically treated teeth, were selected. Searches were performed in the PubMed and SCOPUS databases without time restriction. Screening and data extraction were performed by 2 researchers independently. A standardized outline was used to extract the data (questions related to the theme and the response rate of each question on the survey), and the risk of bias was assessed. Descriptive analysis was performed of the collected information. RESULTS Twenty-five articles were included. Most dentists who answered the surveys reported the time since graduation as 1 to 20 years (40%), and 44% were specialists. The most reported choices concerning the type of posts used were prefabricated posts (45.8%), cast metal posts (16.7%), and both posts (16.7%). The cast metal posts were cited more frequently in surveys published between 1994 and 2010, whereas prefabricated posts, both metal and glass fiber ones, were cited between 2006 and 2019. The preferred luting agent for intracanal posts was resin-based (47%). These choices seem to have been influenced by time and by the level of postgraduate training. CONCLUSIONS Restorative preferences related to posts have changed over time, from the use of cast posts to prefabricated ones or the use of both posts and seem to be influenced by experience and postgraduate training.
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Affiliation(s)
- Luiza Paloma S Girotto
- Master student, Graduate Program in Dentistry, Meridional Faculty, IMED, Passo Fundo, Rio Grande do Sul, Brazil
| | - Lara Dotto
- Master student, Graduate Program in Dentistry, Meridional Faculty, IMED, Passo Fundo, Rio Grande do Sul, Brazil
| | - Gabriel K Rocha Pereira
- Associate Professor, Post-Graduate Program in Oral Sciences, Federal University of Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Ataís Bacchi
- Associate Professor, Graduate Program in Dentistry, Meridional Faculty, IMED, Passo Fundo, Rio Grande do Sul, Brazil
| | - Rafael Sarkis-Onofre
- Associate Professor, Graduate Program in Dentistry, Meridional Faculty, IMED, Passo Fundo, Rio Grande do Sul, Brazil.
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Long-term costs of post-restorations: 7-year practice-based results from Germany. Clin Oral Investig 2020; 25:2175-2181. [PMID: 32857211 PMCID: PMC7966625 DOI: 10.1007/s00784-020-03529-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 08/14/2020] [Indexed: 11/26/2022]
Abstract
Objectives We evaluated the initial and follow-up treatment costs of different post-restorations in a practice-based German healthcare setting. Methods A total of 139 incisors, canines, or premolars received post-restorations placed by eight general dental practitioners in Germany, and were followed over a mean ± SD 7.1 ± 4.5 years. Preformed metal (MP, n = 68), glass-fiber (GF, n = 28), or cast post-and-core buildups (MC, n = 23) had been used to retain crowns or bridge anchors. Preformed metal and glass-fiber had also been used to retain directly built up post-retained composite restorations (PC, n = 20). Material and treatment costs for the initial post-restorations as well as restorative, endodontic, or surgical re-treatments were estimated from a public-payer-perspective in Germany. Associations between total and annualized total costs and covariates were assessed using generalized linear modeling. The study was registered in the German Clinical Trials Register (DRKS-ID: DRKS00012938). Results MC showed highest initial treatment costs (557.23 Euro), but the least re-treatments (6/23, 26%), while PC showed lowest initial costs (203.52 Euro) but the most re-treatments (11/20, 55%). Costs for MP/GF post-crowns were initially similarly costly (496.47/496.87 Euro), and both also showed similar re-treatments (35%/36%). The overall annual failure rate was 5.2% (MC: 3.5%, MP: 4.6%, GF: 5.3%, PC: 10.3%). Including costs for the resulting re-treatments, mean total costs were 591.66 Euro (MC), 548.31 Euro (MP), 526.37 Euro (GF), and 361.81 Euro (PC). Annualized total costs were 171.36 Euro (MC), 141.75 Euro (MP), 146.12 Euro (GF), and 135.65 Euro (PC). Total and annualized total costs were highest for MC, with PC being the significantly less costly option (p < 0.001). Conclusions Within German healthcare, both initial and follow-up costs for post-restorations were considerable. Saving costs initially may, at least partially, be offset by more complications long-term. Clinical relevance Dentists need to be aware that the placement of posts is not only initially costly but also comes with significant long-term costs for treating occurring complications. This should be communicated with patients and considered during treatment planning. Electronic supplementary material The online version of this article (10.1007/s00784-020-03529-5) contains supplementary material, which is available to authorized users.
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Machry RV, Fontana PE, Bohrer TC, Valandro LF, Kaizer OB. Effect of Different Surface Treatments of Resin Relined Fiber Posts Cemented With Self-adhesive Resin Cement on Push-out and Microtensile Bond Strength Tests. Oper Dent 2020; 45:E185-E195. [PMID: 32216727 DOI: 10.2341/19-108-l] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/16/2019] [Indexed: 11/23/2022]
Abstract
CLINICAL RELEVANCE When luting relined fiber posts with self-adhesive cement, the surface treatment of the posts influences the adhesion of the fiber posts to root dentin. SUMMARY This study evaluated the effect of surface treatment and silanization of resin composite on the bond strength of relined fiber posts cemented with self-adhesive resin cement. Push-out and microtensile bond strength (MTBS) tests were performed in this study. The endodontic treatment of 80 single-rooted bovine teeth was first performed in the push- out test segment, followed by weakening the intracanal walls by diamond bur. Then, the glass fiber posts were adapted with resin composite to fill the root canals, followed by photoactivation and resin surface conditioning according to four different experimental conditions: no conditioning as control, 10% hydrofluoric acid, 35% hydrogen peroxide, or air abrasion with alumina particle (all groups were subdivided into "with silanization" or "without silanization," thus totaling eight experimental groups). Self-adhesive resin cement was used for the post cementation. Four slices per tooth were obtained for the push-out tests. Next, 160 blocks of resin composite were first produced for the MTBS tests; their bonding surfaces were conditioned (as mentioned, ie, eight treatments), and they were cemented to each other. The 80 sets (n=10/treatment) were then cut into microbars (16/set): eight were immediately tested, while the other eight were thermocycled (12,000×) and stored (120 days) before MTBS. Failure modes and topographic analyses were performed after treatments. There was no statistically significant difference for the push-out results. In MTBS, surface treatment and silanization had a significant effect (p<0.001). Aging decreased bond strength for all groups. Considering the aged groups, air abrasion promoted the highest values and silanization improved bond strength for all treatments except air abrasion. The alumina particle air abrasion of the relining resin composite promoted the highest bond strengths when luting with self-adhesive resin cement.
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Cesca R, Colombo V, Ernst B, Gallo LM, Özcan M. Tensile Strength and Failure Types of Direct and Indirect Resin Composite Copings for Perio-Overdentures Luted Using Different Adhesive Cementation Modalities. MATERIALS 2020; 13:ma13163517. [PMID: 32784945 PMCID: PMC7475840 DOI: 10.3390/ma13163517] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 08/01/2020] [Accepted: 08/04/2020] [Indexed: 11/24/2022]
Abstract
Perio-overdenture design helps to reduce periodontal diseases and secondary caries on abutment teeth. Composite copings can be cemented adhesively to the abutment teeth with different techniques. In this study, direct/indirect resin composite copings for perio-overdentures, luted using different adhesive cementation modalities were compared. Human teeth (N = 40) were prepared to receive spherical attachment copings and randomly divided into four groups: (1) resin-composite copings bonded directly (DC), (2) composite copings made indirectly, luted with dual-polymerized resin cement (ICV), (3) composite copings made indirectly, bonded with resin composite (ICT), (4) composite copings made indirectly, bonded with resin composite after the immediate dentin sealing method (IDS). Specimens were tested for tensile failure and one-way ANOVA (alpha = 0.05) was performed and the two-parameter Weibull modulus, scale (m) and shape (0) were calculated. Mean tensile load (N) was significantly higher for Group IDS (238 ± 81) than for the other groups (144 ± 53–184 ± 46) (p < 0.05). Group IDS (0.54 ± 0.25 mm) showed significantly higher deformation (mm) than other groups (0.2 ± 0.1–0.32 ± 0.15) (p < 0.05). Weibull distribution presented lower shape (0) for DC (3.33) compared to other groups (3.57–4.99). Cohesive coping failures were more frequent in Group IDS (60%) and mixed failures in other groups (40–60%). In conclusion, IDS copings could be preferred over other fabrication and adhesion modalities.
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Affiliation(s)
- Raffaele Cesca
- Laboratory of Physiology and Biomechanics of the Masticatory System, Clinic for Masticatory Disorders, Center for Dental and Oral Medicine, University of Zurich, 8032 Zurich, Switzerland; (R.C.); (V.C.); (L.M.G.)
| | - Vera Colombo
- Laboratory of Physiology and Biomechanics of the Masticatory System, Clinic for Masticatory Disorders, Center for Dental and Oral Medicine, University of Zurich, 8032 Zurich, Switzerland; (R.C.); (V.C.); (L.M.G.)
| | - Bruna Ernst
- Clinic for Reconstructive Dentistry, Division of Dental Biomaterials, Center for Dental and Oral Medicine, University of Zürich, 8032 Zurich, Switzerland;
| | - Luigi Maria Gallo
- Laboratory of Physiology and Biomechanics of the Masticatory System, Clinic for Masticatory Disorders, Center for Dental and Oral Medicine, University of Zurich, 8032 Zurich, Switzerland; (R.C.); (V.C.); (L.M.G.)
| | - Mutlu Özcan
- Clinic for Reconstructive Dentistry, Division of Dental Biomaterials, Center for Dental and Oral Medicine, University of Zürich, 8032 Zurich, Switzerland;
- Correspondence: ; Tel.: +41-44-634-3251; Fax: +41-44-634-4305
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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.
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Costa Scholz MF, Aboud Matos de Almeida R, Scholz N, Gomes GM, Masson-P MJ, Loguercio AD, Reis A, Bandéca MC. The Effect of Viscosity and Application Mode of Phosphoric Acid on Bond Strength of GlassFiber Post. Clin Cosmet Investig Dent 2020; 12:61-70. [PMID: 32161504 PMCID: PMC7049749 DOI: 10.2147/ccide.s230134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 12/06/2019] [Indexed: 11/23/2022] Open
Abstract
Background When a phosphoric acid is used, before applying an adhesive system, it is known that obtaining an effective adhesion to the root canal walls is a challenge. The aim of the present study was to evaluate the influence of phosphoric acid viscosity and application mode on the push-out bond strength (BS) values of fiberglass post to root dentin. The conditioning pattern on the root dentin was also evaluated. Materials and Methods The roots of 44 endodontically treated premolars were divided into 4 groups, of eleven teeth each, according to the combination of the main factors: phosphoric acid viscosity (liquid or gel) and application mode (passive or sonic). After application of the two-step etch-and-rinse adhesive system, the fiberglass posts were cemented with a dual-cure resin-cement. Roots were sectioned transversely into six 1-mm slices for push-out BS test at 0.5 mm/min. Some roots of each group were selected for evaluation of the conditioning pattern by scanning electron microscopy. BS results (three-way ANOVA and Tukey’s test) and the conditioning pattern (Kruskal–Wallis test and Mann–Whitney test) were statistically evaluated (α= 0.05). Results The highest BS value was observed with a liquid phosphoric acid under sonic application mode (p < 0.05), being all other groups similar to one another (p < 0.05). Also, the highest BS value was observed in the cervical third, followed by the medium and the apical thirds (p < 0.05). The sonic application produced better smear layer removal and opening of dentinal tubules for both viscosities (p = 0.015). Conclusion A better bonding of fiberglass posts to root canals can be achieved when the post spaces are conditioned with a liquid phosphoric acid under sonic application.
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Affiliation(s)
| | | | - Nelson Scholz
- Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil
| | - Giovana M Gomes
- Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil
| | - María José Masson-P
- Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil
| | - Alessandro D Loguercio
- Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil.,Faculdad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito, Equador
| | - Alessandra Reis
- Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil
| | - Matheus C Bandéca
- The Post-Graduation Program in Dentistry, CEUMA University, São Luis, Maranhão, Brazil
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Calabro DE, Kojima AN, Gallego Arias Pecorari V, Helena Coury Saraceni C, Blatz MB, Özcan M, Mikail Melo Mesquita A. A 10-Year Follow-Up of Different Intra-Radicular Retainers in Teeth Restored with Zirconia Crowns. Clin Cosmet Investig Dent 2019; 11:409-417. [PMID: 31920401 PMCID: PMC6938187 DOI: 10.2147/ccide.s228966] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 11/20/2019] [Indexed: 11/27/2022] Open
Abstract
Purpose To evaluate the survival rate in restored teeth with three different types of retainers prior to the fixing of crowns with zirconia through this retrospective clinical study. It is unclear how the type of post and core rehabilitation, and type of resin cement affect the longevity of teeth restored with crowns. Methods In a private clinic, a total of 101 retainers installed by the same professional between June 2008 and January 2018, with an average time of 58.2 months (4.8 years), were analyzed regarding the following factors: survival, cement and failure type. Three types of retainers were used according to the indications found in the literature: filling with Z250 light-cured composite resin, 22 elements; fiberglass post with Z250 light-cured composite resin, 45 elements; and cast metallic core in silver-tin alloy, 34 elements. The retainers were cemented with chemically cured cement, U100, U200, or Panavia F. Results Data were subjected to Kaplan-Meier analysis (p=0.495). Although the study presented several limitations, no significant differences were observed in the success rates between the types of intra-radicular retainers and the type of cement. The success rates were as follows: metal core, 97.1%; fiberglass post, 95.6%; and filling, 100%. On average, failures occurred at 48.4 months. Conclusion In view of the results, it is possible to conclude that the different retainers evaluated have similar survival rates. ![]()
Point your SmartPhone at the code above. If you have a QR code reader the video abstract will appear. Or use: https://youtu.be/QKIn3RiFx_Y
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Affiliation(s)
- Debora E Calabro
- Department of Prosthodontics, Paulista University (UNIP) São Paulo, São Paulo, Brazil
| | - Alberto N Kojima
- Department of Dental Materials and Prosthodontics, Paulista State University (UNESP) São José, São Paulo, Brazil
| | | | | | - Markus B Blatz
- Unit Center for Dental and Oral Medicine Clinic for Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zurich, Switzerland
| | - Mutlu Özcan
- Professor, Department of Preventive and Restorative Sciencie, University of Pennsylvania, Philadelphia, PA, USA
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Martino N, Truong C, Clark AE, O'Neill E, Hsu SM, Neal D, Esquivel-Upshaw JF. Retrospective analysis of survival rates of post-and-cores in a dental school setting. J Prosthet Dent 2019; 123:434-441. [PMID: 31353108 DOI: 10.1016/j.prosdent.2019.05.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 04/16/2019] [Accepted: 05/02/2019] [Indexed: 11/16/2022]
Abstract
STATEMENT OF PROBLEM The clinical survival of different types of post-and-core systems requires assessment. PURPOSE The purpose of this retrospective clinical study was to evaluate the clinical survival rate (CSR) of custom-fabricated cast metal and prefabricated (both metal- and fiber-reinforced composite resin post) post-and-cores as a function of patient- and restoration-related variables. MATERIAL AND METHODS A retrospective analysis was conducted on electronic charts indicating that these patients had received some type of post-and-core between January 2003 and January 2018. A total of 754 records were included in the analysis based on the inclusion criteria. Data were analyzed by using the Kaplan-Meier and Cox proportional hazards analysis. RESULTS Kaplan-Meier analysis demonstrated the mean survival time for each group to be 12.0 years for fiber-reinforced composite resin posts, 11.8 years for cast metal post-and-cores, and 10.2 years for prefabricated metal posts. Although the mean survival time differed by 1.8 years among groups, with prefabricated metal posts having a slightly higher risk of failure, this effect was not statistically significant (P=.067). The effect of post type also failed to reach significance when controlling for patient demographics and post position in a Cox proportional hazards analysis (P=.106). However, the Cox model did show that survival was associated with tooth position (P=.003), cement (P=.021), and type of restoration (P<.001). CONCLUSIONS Analysis showed no evidence that post-and-core survival was significantly associated with 3 types of post-and-cores (custom-fabricated metal, prefabricated metal, and prefabricated fiber-reinforced composite resin). The percentage of root in the bone, tooth position, cement, and type of restoration, however, were significantly associated with survival.
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Affiliation(s)
- Nicole Martino
- Graduate Prosthodontic resident, Graduate Prosthodontics Program, Restorative Dental Sciences, University of Florida College of Dentistry, Gainesville, Fla
| | - Caroline Truong
- Graduate Prosthodontic resident, Graduate Prosthodontics Program, Restorative Dental Sciences, University of Florida College of Dentistry, Gainesville, Fla
| | - Arthur E Clark
- Professor, Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, Fla
| | - Edgar O'Neill
- Clinical Associate Professor, Restorative Dental Sciences, Graduate Prosthodontics Program, University of Florida College of Dentistry, Gainesville, Fla
| | - Shu-Min Hsu
- Research Associate, Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, Fla
| | - Dan Neal
- Senior Statistician, Department of Neurosurgery, University of Florida College of Medicine, Gainesville, Fla
| | - Josephine F Esquivel-Upshaw
- Associate Professor, Restorative Dental Sciences, University of Florida College of Dentistry, Division of Prosthodontics, Gainesville, Fla.
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Gulabivala K, Ng YL. Value of root-filled teeth in maintaining a functional dentition for life. Br Dent J 2019; 226:769-784. [DOI: 10.1038/s41415-019-0313-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Chauhan NS, Saraswat N, Parashar A, Sandu KS, Jhajharia K, Rabadiya N. Comparison of the Effect for Fracture Resistance of Different Coronally Extended Post Length with Two Different Post Materials. J Int Soc Prev Community Dent 2019; 9:144-151. [PMID: 31058064 PMCID: PMC6489518 DOI: 10.4103/jispcd.jispcd_334_18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 12/03/2018] [Indexed: 11/20/2022] Open
Abstract
Aims and Objectives: To compare the effect for fracture resistance of different coronally extended post length with two different post materials. Materials and Methods: One hundred and sixty endodontically treated maxillary central incisors embedded in acrylic resin with decoronated root portion were taken for the study. The postspaces were prepared according to standard protocol. The samples were divided into two groups according to the post material: glass-fiber post and Quartz fiber post. These groups were further subdivided on the basis of coronal extension of 4 and 6 mm for glass fiber and Quartz fiber posts, respectively. The posts were then luted with dual-polymerizing resin cement followed by core buildup. Samples were subjected to increasing compressive oblique load until fracture occurred in a universal testing machine. Data were analyzed with one-way ANOVA and independent Student's t-test. Analysis was done using SPSS version 15 (SPSS Inc., Chicago, IL, USA) Windows software program. Results: Glass fiber post with coronal extension of 4 mm (182.8 N) showed better results than with 6-mm length (124.1 N). Similarly, in quartz fiber posts group, 4-mm postlength (314 N) was better when compared with 6 mm (160 N). The 4-mm coronal extension of quartz fiber post displayed superior fracture resistance. Conclusions: Glass fiber posts showed better fracture resistance than Quartz fiber posts. 4-mm coronal length showed more fracture resistance than 6 mm.
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Affiliation(s)
- Niharika Singh Chauhan
- Department of Prosthodontics, MA Rangoonwala Dental College and Research Center, Pune, Maharashtra, India
| | - Nidhi Saraswat
- Department of Dentistry, Ingham Institute Applied Medical Research, Western Sydney University, South Western Sydney Local Health District, Sydney, Australia
| | - Ankita Parashar
- Index Institute of Dental Science, Indore, Madhya Pradesh, India
| | - Kuldeep Singh Sandu
- Department of Conservative and Endodontics, R R Dental College, Udaipur, Rajasthan, India
| | - Kapil Jhajharia
- Department of Endodontics, Faculty of Dentistry, Melaka Manipal Medical College, Melaka, Malaysia
| | - Nirav Rabadiya
- BDS, MPH, Grand Valley State University, Allendale, Michigan, USA
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Carvalho MAD, Lazari PC, Gresnigt M, Del Bel Cury AA, Magne P. Current options concerning the endodontically-treated teeth restoration with the adhesive approach. Braz Oral Res 2018; 32:e74. [DOI: 10.1590/1807-3107bor-2018.vol32.0074] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 06/12/2018] [Indexed: 01/21/2023] Open
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The Effect of Intraradicular Multiple Fiber and Cast Posts on the Fracture Resistance of Endodontically Treated Teeth with Wide Root Canals. BIOMED RESEARCH INTERNATIONAL 2018; 2018:1671498. [PMID: 30186851 PMCID: PMC6114070 DOI: 10.1155/2018/1671498] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 05/02/2018] [Indexed: 12/13/2022]
Abstract
Introduction The endodontically treated teeth (ETT) with thin remaining radicular dentin thickness are predisposed to fracture; hence it requires the diligent selection and the execution of endodontic post treatment. The objective of the study was to evaluate the reinforcing effect of both multiple fiber reinforced composite (FRC) and Ni-Cr cast metal posts at anterior and posterior regions. Material and Methods Forty recently extracted root canal treated canine and single rooted premolar teeth were used for the study. They were randomly divided into four groups (n=10) as: Group 1, single FRC post; Group 2, multiple FRC posts; Group 3, single Ni-Cr metal post, Group 4, multiple Ni-Cr posts. The posts were cemented with self-adhesive resin cement and subsequently restored with full veneer metal crown. The compressive static load at 1300 for canine and 450 for premolar was applied with the cross-head speed of 0.5mm/minute until the fracture. The obtained data was analyzed using the Kruskal–Wallis and Pairwise comparison tests with SPSS. Results The results indicate that multiple FRC post restored canine had the maximum fracture load (1843.80±7.13 N), followed by cast multiple posts (1648.99±26.84 N), single fiber post (1623±40.31 N), and cast metal single post (1493±27.33 N). A similar trend was observed in premolar with higher max fracture load with multiple FRC posts at 1920.86±20.61 N and multiple cast metal posts at 1735.43±6.05 N. Conclusion The restoration of ETT with larger canals by multiple FRC and metal posts provides substantially higher fracture resistance in comparison to wider single post.
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Mobilio N, Fasiol A, Mollica F, Catapano S. In Vitro Fracture Strength of Teeth Restored with Lithium Disilicate Onlays with and without Fiber Post Build-Up. Dent J (Basel) 2018; 6:dj6030035. [PMID: 30041411 PMCID: PMC6162807 DOI: 10.3390/dj6030035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 07/11/2018] [Accepted: 07/17/2018] [Indexed: 11/16/2022] Open
Abstract
To our knowledge there is no data about the mechanical performance of indirect restoration adhesively cemented on teeth without an adequate build-up to provide the correct geometrical configuration. The aim of this study was to compare the fracture strength of human teeth restored with lithium disilicate onlays, with and without fiber post build-up. METHODS Twenty human mandibular molars were horizontally sectioned and divided into two groups (n = 10). No treatment was applied in group A. Teeth in group B were endodontically treated, built-up using fiber post and composite core and prepared with a circumferential chamfer providing a 1 mm circumferential ferrule. Lithium disilicate onlays were pressed and luted on teeth using dual-curing luting composite. Teeth were tested under static load. Failures were classified as restorable or not restorable. Failure loads were analyzed with one-way analysis of variance. Failure modes were compared using Pearson's Chi-square tests. RESULTS The mean fracture loads were 1383.5 N for group A and 1286.3 N for group B. No difference was found (p = 0.6). Ninety per cent of fractures were classified as not restorable in both groups, with no difference (p = 0.8). CONCLUSIONS For teeth restored with adhesive procedures and lithium disilicate onlays, the presence of build-up with fiber post to provide retention and resistance form does not influence the fracture strength.
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Affiliation(s)
- Nicola Mobilio
- Department of Prosthodontics, Dental School, Dental Clinic, University of Ferrara, 44121 Ferrara, Italy.
- Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy.
| | - Alberto Fasiol
- Department of Prosthodontics, Dental School, Dental Clinic, University of Ferrara, 44121 Ferrara, Italy.
| | - Francesco Mollica
- Department of Engineering, University of Ferrara, 44124 Ferrara, Italy.
| | - Santo Catapano
- Department of Prosthodontics, Dental School, Dental Clinic, University of Ferrara, 44121 Ferrara, Italy.
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Richert R, Robinson P, Viguie G, Farges JC, Ducret M. Multi-Fiber-Reinforced Composites for the Coronoradicular Reconstruction of Premolar Teeth: A Finite Element Analysis. BIOMED RESEARCH INTERNATIONAL 2018; 2018:4302607. [PMID: 29984233 PMCID: PMC6011147 DOI: 10.1155/2018/4302607] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 05/08/2018] [Indexed: 11/17/2022]
Abstract
A coronoradicular reconstruction (CRR) has conventionally used a metallic inlay core (MIC) or a single-fiber-reinforced composite (sFRC) but extensive dentin removal can lead to root fracture. We propose herein a multi-fiber-reinforced composite (mFRC) based on a bundle of thin flexible fibers that can be adapted to the root anatomy without removing additional dentin. The aim of this study was to compare the mechanical behavior of the root reconstructed with mFRC, MIC, or sFRC using a finite element analysis (FEA). Models with or without a ferrule effect were created using Autodesk© software and divided into four parts: root, post, bonding composite or cement, and zirconia crown. For both models, extreme stress values (ESV), stress distribution, and risk of fracture were calculated for an oblique force (45°) of 100 N applied to the top of the buccal cusp. Results indicated that mFRC and mFRCG present a lower risk of fracture of the root and of the CRR without ferrule and thus could be valuable alternatives for premolar CRR. Further studies are necessary to evaluate the clinical success of these CRR.
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Affiliation(s)
- Raphaël Richert
- Université de Lyon, Université Lyon 1, Faculté d'Odontologie, Lyon, France
- Hospices Civils de Lyon, Service de Consultations et Traitements Dentaires, Lyon, France
| | | | - Gilbert Viguie
- Université de Lyon, Université Lyon 1, Faculté d'Odontologie, Lyon, France
- Hospices Civils de Lyon, Service de Consultations et Traitements Dentaires, Lyon, France
| | - Jean-Christophe Farges
- Université de Lyon, Université Lyon 1, Faculté d'Odontologie, Lyon, France
- Hospices Civils de Lyon, Service de Consultations et Traitements Dentaires, Lyon, France
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR5305 CNRS/Université Lyon 1, UMS3444 BioSciences Gerland-Lyon Sud, Lyon, France
| | - Maxime Ducret
- Université de Lyon, Université Lyon 1, Faculté d'Odontologie, Lyon, France
- Hospices Civils de Lyon, Service de Consultations et Traitements Dentaires, Lyon, France
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR5305 CNRS/Université Lyon 1, UMS3444 BioSciences Gerland-Lyon Sud, Lyon, France
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