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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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Fichera G, Mazzitelli C, Picciariello V, Maravic T, Josic U, Mazzoni A, Breschi L. Structurally compromised teeth. Part II: A novel approach to peripheral build up procedures. J ESTHET RESTOR DENT 2024; 36:20-31. [PMID: 37565412 DOI: 10.1111/jerd.13118] [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: 07/15/2023] [Revised: 07/21/2023] [Accepted: 07/24/2023] [Indexed: 08/12/2023]
Abstract
OBJECTIVE To introduce the "Peripheral Build-Up technique - PBUt" as a foundation restoration strategy for structurally compromised teeth (SCT). CLINICAL CONSIDERATIONS Several strategies have been proposed over time (cervical marginal relocation, doughnut, and preformed ring techniques) to enable the management of restorative procedures in challenging situations such as the presence of deep subgingival defects. The PBUt is a versatile, completely additive direct technique that share some strategical concepts with these techniques to approach critical clinical situations while supplying a wider field of application thanks to distinct operative expedients. The clamp insertion modality, the extension of the proximal wall and the matrix customization/stabilization strategies adopted in PBUt endorse the possibility to manage the most apical and peripheral border of the residual tooth structure when located up to >1.5 mm above the bone crest. The periodontal response has to be then monitored over time. Moreover, thanks to the peripheral and apically-extended addictive approach, it allows a massive preservation of residual sound tooth structure and improves the resistance and retentive physical/geometrical features of the abutment tooth. The PBUt operative workflow is herein explained. CLINICAL SIGNIFICANCE The Peripheral-Build-Up technique (PBUt) advocates some innovative clinical restorative steps for the management of SCT with coronal and deep subgingival defects.
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Affiliation(s)
| | - Claudia Mazzitelli
- Department of Biomedical and Neuromotor Science (DIBINEM), Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | | | - Tatjana Maravic
- Department of Biomedical and Neuromotor Science (DIBINEM), Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - Uros Josic
- Department of Biomedical and Neuromotor Science (DIBINEM), Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - Annalisa Mazzoni
- Department of Biomedical and Neuromotor Science (DIBINEM), Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Science (DIBINEM), Alma Mater Studiorum, University of Bologna, Bologna, Italy
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Kadam VS, Huddar D, Badadare M, Jadhav P, Aher S, Botadra A. A Comparative Evaluation of Micro-Leakage in Fiber Post Luted and Core Buildup Performed with Two Different Resin Cements: An In vitro Study. JOURNAL OF PHARMACY AND BIOALLIED SCIENCES 2023; 15:S937-S939. [PMID: 37694032 PMCID: PMC10485472 DOI: 10.4103/jpbs.jpbs_282_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 03/27/2023] [Accepted: 03/28/2023] [Indexed: 09/12/2023] Open
Abstract
Objective To compare the micro-leakages of fiber post luted and core buildup performed with ParaCore (Coltene) and LuxaCore (DMG) resin cement. Materials and Methods Thirty-six single-rooted teeth were selected and treated with root canal treatment and fiber post cementation with two types of resin cement (LuxaCore and ParaCore). Samples were exposed to 500 cycles of thermocycling, immersed in 2% methylene dye and centrifuged and sectioned longitudinally, and checked under a stereomicroscope. Results LuxaCore and ParaCore showed a mean of 0.39250 mm and 0.47500 mm micro-leakage, respectively. Conclusion There was a statistically non-significant difference seen with group 3 (LuxaCore) versus group 4 (ParaCore) (P > 0.05).
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Affiliation(s)
- Vijay S. Kadam
- Department of Prosthodontics Crown and Bridge, Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharashtra, India
| | - Dayanand Huddar
- Department of Prosthodontics Crown and Bridge, Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharashtra, India
| | - Mokshada Badadare
- Department of Prosthodontics Crown and Bridge, Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharashtra, India
| | - Priyanka Jadhav
- Department of Prosthodontics Crown and Bridge, Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharashtra, India
| | - Sakshi Aher
- Department of Prosthodontics Crown and Bridge, Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharashtra, India
| | - Ayushi Botadra
- Department of Prosthodontics Crown and Bridge, Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharashtra, India
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Almaghrabi J, Alesawi A, Attar E, Alshali S. Radiographic Analysis of Posts Performed by Undergraduate Dental Students: A Cross-Sectional Study. Clin Cosmet Investig Dent 2022; 14:37-43. [PMID: 35115842 PMCID: PMC8799894 DOI: 10.2147/ccide.s337012] [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: 08/31/2021] [Accepted: 01/08/2022] [Indexed: 11/23/2022] Open
Abstract
Introduction Post and core restorations for endodontically treated teeth must meet certain prosthetic criteria to ensure the success of the final restoration. The aim of this study is to evaluate the quality of posts performed by dental students at King Abdulaziz University Dental Hospital (KAUDH), Jeddah, Saudi Arabia, utilizing periapical radiographs and whether the prosthetic criteria were strictly met by students. Materials and Methods This cross-sectional study included 661 digital periapical radiographs of posts performed by 6th-year dental students from September 2018 to April 2019. The assessment included the following factors: patient’s age, patient’s gender, tooth type, and arch. Post-related factors including post type, shape, diameter, length, and status of the remaining gutta percha were also evaluated. Statistical analysis was performed using SPSS. Descriptive statistics were generated, and the association between different variables was determined using chi-square test at p<0.05. Results Posts were used to restore maxillary teeth (67%), and were particularly placed in premolars (44%). The majority of used posts were prefabricated tapered fiber posts (90%). The results were as follows: post diameter equal to one-third of root diameter, 50% met criterion; post length equal to two-thirds of root length, 33%; post length equal to or more than crown height, 93%; absence of space between gutta percha (GP) and post, 74%; and length of the remaining GP equal to 3–5 mm, 68%. Overall, 11% of the posts met all the ideal prosthetics criteria. Conclusion Most qualities of post and core restorations that were radiographically assessed were found to be acceptable and within the recommended prosthodontic criteria.
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Affiliation(s)
- Jumana Almaghrabi
- Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Alhanoof Alesawi
- Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Esraa Attar
- Oral Maxillofacial Prosthodontics Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Shatha Alshali
- Oral Maxillofacial Prosthodontics Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
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Roughness and SEM Analysis of Manual and Ultrasonic Instrumentation over Different Crown Materials for Dental Implants Restorations. MATERIALS 2022; 15:ma15031159. [PMID: 35161104 PMCID: PMC8838951 DOI: 10.3390/ma15031159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/16/2022] [Accepted: 01/24/2022] [Indexed: 01/04/2023]
Abstract
The use of new prosthetic materials makes it necessary to establish adequate hygienic protocols. It was decided to make prosthetic crowns from four different materials: composite, lithium disilicate, metal ceramic, and zirconium, and to evaluate the effects on the surfaces of four different instruments through SEM and roughness analysis: manual steel curette, manual titanium curette, ultrasonic steel insert, and ultrasonic peek insert. Forty crowns were made, ten of each type of material. For each material, five crowns were manually instrumented with steel inserts (curette 11-12, PDT, Missoula, MT, USA) and titanium (Wingrove 3-4, PDT, Missoula, MT, USA) on the lingual and buccal surfaces, respectively, and the other five crowns were instrumented with an ultrasonic peek insert (ICS-IC1, Mectron, Carasco, Italy) on the buccal surface and steel (PS, EMS, Nyon, Switzerland) on the lingual surface. At this point, surface roughness analysis was carried out. The data were analyzed with a Kolmogorov-Smirnov test. Therefore, it was decided to conduct two analyses with a Kruskal-Wallis test and Bonferroni post hoc test. Then, the instrumented crowns were analyzed by SEM. The analysis of the data shows that the highest average roughness was within the composite group, while the best material appeared to be disilicate. Significant differences existed between the groups, between the materials, and between the different instruments (p-value < 0.05). In the qualitative analysis carried out by SEM, the classic steel insert eliminated the residues of golden finishing. The peek insert created alterations on all tested surfaces. The steel curette did not create particular problems, with the exception of zirconium, where it was possible to observe some scratch lines. Instrumentation with the titanium curette created deeper incisions than the steel curette in the composite and disilicate. The best results came from the ultrasonic steel insert, while the best material appeared to be disilicate.
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Barallat L, Arregui M, Fernandez-Villar S, Paniagua B, Pascual-La Rocca A. Fracture Resistance in Non-Vital Teeth: Absence of Interproximal Ferrule and Influence of Preparation Depth in CAD/CAM Endocrown Overlays-An In Vitro Study. MATERIALS 2022; 15:ma15020436. [PMID: 35057154 PMCID: PMC8778771 DOI: 10.3390/ma15020436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 12/27/2021] [Accepted: 01/04/2022] [Indexed: 02/04/2023]
Abstract
There is ample evidence to support the use of endocrowns to restore endodontic teeth. However, the influence of the position of the interproximal margins on fracture strength has not yet been studied. The aim was to determine the relationship between the apicocoronal position of the interproximal restorative margins and fracture resistance in nonvital teeth restored with CAD/CAM endocrown overlays. Forty extracted human maxillary premolars were prepared for endocrown overlay restorations without ferrule on the interproximal aspects and classified according to the position of the interproximal restoration margins in relation to the alveolar crest: 2 mm (group A), 1 mm (group B), 0.5 mm (group C), and 0 mm (group D). Fracture strength was measured using a universal testing machine applying a compressive force to the longitudinal tooth axis. Group A had a mean fracture resistance of 859.61 (±267.951) N, group B 1053.9 (±333.985) N, group C 1124.6 (±291.172) N, and group D 780.67 (±183.269) N, with statistical differences between groups. Group C had the highest values for fracture strength compared to the other groups (p < 0.05). The location of the interproximal margins appears to influence the fracture resistance of CAD/CAM endocrown overlays. A distance of 0.5 mm between the interproximal margin and the alveolar crest was associated with increased fracture resistance.
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Affiliation(s)
- Lucía Barallat
- Department of Periodontics, Faculty of Dentistry, Universitat Internacional de Catalunya, 08195 Sant Cugat del Valles, Spain; (L.B.); (B.P.); (A.P.-L.R.)
| | - María Arregui
- Department of Dentistry, Faculty of Dentistry, Universitat Internacional de Catalunya, 08195 Sant Cugat del Valles, Spain
- Correspondence: ; Tel.: +34-93504200
| | - Sandra Fernandez-Villar
- Department of Restorative Dentistry, Faculty of Dentistry, Universitat Internacional de Catalunya, 08195 Sant Cugat del Valles, Spain;
| | - Blanca Paniagua
- Department of Periodontics, Faculty of Dentistry, Universitat Internacional de Catalunya, 08195 Sant Cugat del Valles, Spain; (L.B.); (B.P.); (A.P.-L.R.)
| | - Andrés Pascual-La Rocca
- Department of Periodontics, Faculty of Dentistry, Universitat Internacional de Catalunya, 08195 Sant Cugat del Valles, Spain; (L.B.); (B.P.); (A.P.-L.R.)
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Ahmed MAA, Kern M, Mourshed B, Wille S, Chaar MS. Fracture resistance of maxillary premolars restored with different endocrown designs and materials after artificial ageing. J Prosthodont Res 2021; 66:141-150. [PMID: 34108294 DOI: 10.2186/jpr.jpr_d_20_00082] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To evaluate the effect of three different designs and two monolithic ceramic materials on the durability and fracture resistance of endocrowns on maxillary first premolars, in comparison to post-and-core crowns. METHODS Fifty-six maxillary premolars were endodontically treated and shortened to a level of 2 mm from the cervical line, and randomly categorized into six endocrown groups and post-and-core crown control group (n=8); E1; endocrowns with flat occlusal table (without ferrule), E2; endocrowns with 1.5 mm circumferential ferrule, E3; endocrowns with 1.5 mm buccal ferrule preparation. Two materials were used for endocrowns: zirconia (4YSZ; Z), and lithium disilicate (L). The control group was restored with zirconia posts, and lithium disilicate crowns. All restorations were bonded using Panavia V5 and its respective primers and underwent thermo-mechanical fatigue with a 10 kg dynamic load for 1,200,000 cycles and thermocycling between 5 and 55 °C. Thereafter all survived specimens were loaded to fracture. The results were statistically analyzed using ANOVA and T-Test. RESULTS None of the specimens showed any signs of debonding or fracture caused by the fatigue test. The PC control group showed no statistically significant difference in comparison to groups ZE1, ZE2 and LE2 ( p > 0.05 ). However, it was significantly different from groups LE1, LE3, and ZE3 ( p ≤ 0.05 ). CONCLUSIONS Preparation designs and materials affected the fracture resistance of endocrowns. The results showed a superiority of the post-and-core crowns,zirconia/lithium disilicate endocrowns with 1.5 mm circumferential ferrule, and zirconia endocrowns with the flat occlusal table.
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Affiliation(s)
- Mohamed A A Ahmed
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel.,Department of Prosthodontics, College of Dentistry, Ibb University, Ibb
| | - Matthias Kern
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel
| | - Bilal Mourshed
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel
| | - Sebastian Wille
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel
| | - Mohamed Sad Chaar
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel
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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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Kaur B, Gupta S, Grover R, Sadana G, Gupta T, Mehra M. Comparative Evaluation of Fracture Resistance of Endodontically Treated Teeth Restored with Different Core Build-up Materials: An In Vitro Study. Int J Clin Pediatr Dent 2021; 14:51-58. [PMID: 34326584 PMCID: PMC8311759 DOI: 10.5005/jp-journals-10005-1901] [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] [Indexed: 11/23/2022] Open
Abstract
The aim is to evaluate the fracture resistance of endodontically treated teeth restored with posterior direct composite (PRC) resin, bulk-fill composite resin, dual-cure composite (DCC) resin, and short fiber-reinforced composite (SFC) resin material.
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Affiliation(s)
- Buneet Kaur
- Department of Pedodontics and Preventive Dentistry, Sri Guru Ram Das Institute of Dental Sciences and Research, Amritsar, Punjab, India
| | - Sunil Gupta
- Department of Pedodontics and Preventive Dentistry, Sri Guru Ram Das Institute of Dental Sciences and Research, Amritsar, Punjab, India
| | - Rashu Grover
- Department of Pedodontics and Preventive Dentistry, Sri Guru Ram Das Institute of Dental Sciences and Research, Amritsar, Punjab, India
| | - Gunmeen Sadana
- Department of Pedodontics and Preventive Dentistry, Sri Guru Ram Das Institute of Dental Sciences and Research, Amritsar, Punjab, India
| | - Teena Gupta
- Department of Pedodontics and Preventive Dentistry, Sri Guru Ram Das Institute of Dental Sciences and Research, Amritsar, Punjab, India
| | - Manjul Mehra
- Department of Pedodontics and Preventive Dentistry, Sri Guru Ram Das Institute of Dental Sciences and Research, Amritsar, Punjab, India
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Canjau S, Stefan C, Szuhanek CA. Alternative treatment approach for anterior subgingival dental lesions: Forced eruption using attractive magnets. Am J Orthod Dentofacial Orthop 2020; 158:126-133. [PMID: 32600750 DOI: 10.1016/j.ajodo.2020.03.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 03/01/2020] [Accepted: 03/01/2020] [Indexed: 11/18/2022]
Abstract
This article reports the use of a minimally invasive technique to address a challenging clinical problem in the esthetic zone. The clinical steps taken to achieve forced eruption by 1.5-2.0 mm of a maxillary central incisor that presented minimal clinical crown because of caries are described in detail. This subsequently allowed the successful placement of a crown. The tooth was extruded by forces generated between 2 neodymium-iron-boron magnets. One was affixed to the palatal surface of the tooth, and the other was embedded in a thermoformed splint. Weekly circumferential supracrestal fiberotomies were performed to enable extrusion without osseous migration. The extrusion was clinically and radiographically detectable after 6 weeks of magnetic force application. After an initial retention period of 8 weeks, the maxillary incisors were restored with lithium-disilicate ceramic veneers and crowns.
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Affiliation(s)
| | | | - Camelia A Szuhanek
- Department of Orthodontics, Faculty of Dentistry, "Victor Babeș" University of Medicine and Pharmacy, Timișoara, Romania.
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11
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Rosen E, Volmark Y, Beitlitum I, Nissan J, Nemcovsky CE, Tsesis I. Dental implant placement is a possible risk factor for the development of multiple cracks in non-endodontically treated teeth. Sci Rep 2020; 10:8527. [PMID: 32444845 PMCID: PMC7244581 DOI: 10.1038/s41598-020-65408-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 04/30/2020] [Indexed: 11/30/2022] Open
Abstract
The objective of this study was to evaluate potential risk factors, including the placement of dental implants, for the development of tooth cracks. A series of 212-patients, who were referred for endodontic treatment, were retrospectively screened, of which 72 (34%) patients had been diagnosed with 80-cracked teeth confirmed with an operating microscope. These patients had an average age of 53-years and were equally distributed between genders. Forty-one percent of the cracked teeth were diagnosed after the placement of dental implants, with an average of 3-implants per patient. Seventy percent of the cracks were diagnosed more than 1-year after implant loading. Implant placement was associated with higher odds of having multiple cracks (OR = 9.78, CI:2.320, 41.216)(p < 0.05). The proportion of cracked premolars was relatively high (30%), and most cracked teeth (79%) were vital and with a normal periapical diagnosis (86%). Most cracked teeth (71%) had an amalgam restoration, and teeth restored with amalgam were at a higher risk of having multiple cracks (p < 0.05). Clinicians should be aware of a common profile of endodontic patients with multiple cracks in a non-endodontically treated premolar, restored with an amalgam restoration, which was diagnosed with the cracks more than 1-year after reconstruction utilizing multiple implants.
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Affiliation(s)
- Eyal Rosen
- Department of Endodontology, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
- Tel Aviv University Center for Nanoscience and Nanotechnology, Tel Aviv, Israel.
| | - Yael Volmark
- Department of Prosthodontics, Hebrew University - Hadassah, School of Dental Medicine, Jerusalem, Israel
| | - Ilan Beitlitum
- Department of Periodontology and Implant Dentistry, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Joseph Nissan
- Oral-Rehabilitation & Implant-Prosthodontics, Rabin Medical-Center, Belinson Hospital, Petah-Tikva, Israel
- Department of Oral-Rehabilitation, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Carlos E Nemcovsky
- Department of Periodontology and Implant Dentistry, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Igor Tsesis
- Department of Endodontology, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
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Qudaih MA, Yousief SA, Allabban MNM, Nejri AAM, Elmarakby AM. Effect of Two Different Surface Treatments on Retention of Cosmopost with Two Different Core Materials. Clin Cosmet Investig Dent 2020; 12:87-100. [PMID: 32280279 PMCID: PMC7125339 DOI: 10.2147/ccide.s236323] [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: 10/28/2019] [Accepted: 02/15/2020] [Indexed: 11/24/2022] Open
Abstract
Objective The objective of this study was to determine the effect of Cosmopost’s two different surface treatments (sandblasting and silica coating) on persistence to various core materials using push-out test set-up. Material and Methods A total of 30 Cosmoposts was used in this study. Cosmoposts were divided into three groups (10 samples each) according to the post-surface treatment received. Every category was additionally subdivided into two subgroups according to the type of core material (n = 5 samples). A specially designed copper mold was used for construction of different core materials with standardized dimensions around the posts, in such a way to ensure that the posts will be centralized. Surface roughness was estimated for all Cosmoposts, following different surface treatments using SEM. Cylindrical cores were fabricated of either composite resin or heat-pressed zirconia-containing glass-ceramic (IPS Empress Cosmo, Ivoclar Vivadent). Following the construction of different Core materials, samples were subjected to push-out test set-up to Evaluate the impact of various treatments on post/core bond strength. Data were collected, tabulated and statistically analyzed. SEM was performed on Cosmoposts following debonding of different post/core samples to determine their mode of failure. Results Results of push-out bond strength revealed that core material, surface treatment and the interaction between the two variables using Two-way ANOVA had a statistically significant effect on mean push-out bond strength. Regarding the effect of type of core material on Push-out bond strength, results showed that IPS Empress Cores showed statistically significant higher mean push-out bond strength to Cosmopost (36.4±9.7MPa) than composite cores (15.8±2.5 MPa). Conclusion Within the limitations of this study, direct heat-pressed ceramic core was more beneficial for zirconia post buildups, than Composite Cores, since they provided higher bond strength. Thanks to a double improvement: increase in fracture resistance and retentive capacity to post. Also, Tribochemical Silicacoating technique was proved to be more effective in Cosmopost treatments than sandblasting technique.
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Affiliation(s)
- Mohamed A Qudaih
- Department of Restorative Dental Sciences, AlFarabi Private College for Dentistry and Nursing, Jeddah, Kingdom of Saudi Arabia
| | - Salah A Yousief
- Department of Restorative Dental Sciences, AlFarabi Private College for Dentistry and Nursing, Jeddah, Kingdom of Saudi Arabia.,Department of Fixed Prosthodontic, Faculty of Dental Medicine, Al-Azhar University, Assiut Branch, Cairo, Egypt
| | - Mahmoud N M Allabban
- Department of Restorative Dental Sciences, AlFarabi Private College for Dentistry and Nursing, Jeddah, Kingdom of Saudi Arabia
| | - Ali Abkar Mohammed Nejri
- Department of Restorative Dental Sciences, AlFarabi Private College for Dentistry and Nursing, Jeddah, Kingdom of Saudi Arabia
| | - Ahmed Mohamed Elmarakby
- Department of Restorative Dental Science, AlFarabi Colleges for Dentistry and Nursing, Riyadh, Kingdom of Saudi Arabia.,Department of Operative Dentistry, Faculty of Dental Medicine, Al-Azhar University, Assiut Branch, Cairo, Egypt
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Cadore-Rodrigues AC, Guilardi LF, Wandscher VF, Pereira GKR, Valandro LF, Rippe MP. Surface treatments of a glass-fiber reinforced composite: Effect on the adhesion to a composite resin. J Prosthodont Res 2019; 64:301-306. [PMID: 31718959 DOI: 10.1016/j.jpor.2019.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 07/07/2019] [Accepted: 09/03/2019] [Indexed: 10/25/2022]
Abstract
PURPOSE To compare the effect of different surface treatments (pre-treatments and bonding agents) on the bond strength between glass-fiber post and composite resin, and the topographic alterations of the treated post surface. METHODS Thirty-six glass-fiber blocks (12mm×10mm×8mm) were specifically manufactured for this study and randomly assigned into 12 groups considering two factors: 'pre-treatments' (-cleaning with 70% alcohol; air-abrasion with silica-coated aluminum oxide particles; 35% hydrogen peroxide) and type of 'bonding agent' (no bonding agent; application of Monobond Plus; RelyX Ceramic Primer; Single Bond Universal). After that, 6 cylindrical templates (1mm high×1mm Ø) were fixed on each block, filled with composite resin (n=18) and light-cured. Specimens were stored under 37°C for 24h and microshear tests (wire loop Ø=0.2mm) were performed. Topographic, roughness and failure analyses were also performed. RESULTS Different surface pre-treatments led to different topographic and roughness alterations; a higher surface alteration was noted after silica particles air-abrasion, while a slight surface alteration in the hydrogen peroxide group and a smooth pattern were observed in the cleaning group. The factors 'pre-treatments' (p<0.05), 'bonding agent' (p<0.05) and their interaction (p<0.05) influenced the bond strength. Silica coating, apart from bonding agent application, or Single Bond Universal application without pre-treatment promoted the highest bond values. The main failure type was adhesive at the resin-post interface. CONCLUSIONS In terms of pre-treatments, silica coating promotes the best bonding performance, but pre-treatments can be dispensable when applying Single Bond Universal.
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Affiliation(s)
- Ana C Cadore-Rodrigues
- Post-Graduate Program in Oral Science, Division of Prosthetic Dentistry, Federal University of Santa Maria, Marechal Floriano Peixoto Street 1184, 97015-372 Santa Maria, Rio Grande do Sul State, Brazil.
| | - Luís F Guilardi
- Post-Graduate Program in Oral Science, Division of Prosthetic Dentistry, Federal University of Santa Maria, Marechal Floriano Peixoto Street 1184, 97015-372 Santa Maria, Rio Grande do Sul State, Brazil.
| | - Vinicius F Wandscher
- Faculty of Odontology, Prosthodontics Unit, Franciscan University, Silva Jardim Street 1175, 97010-491 Santa Maria, Rio Grande do Sul State, Brazil.
| | - Gabriel K R Pereira
- Post-Graduate Program in Dentistry, School of Dentistry, Meridional Faculty - IMED, Senador Pinheiro Street 304, 99070-220 Passo Fundo, Rio Grande do Sul State, Brazil.
| | - Luiz F Valandro
- Post-Graduate Program in Oral Science, Division of Prosthetic Dentistry, Federal University of Santa Maria, Marechal Floriano Peixoto Street 1184, 97015-372 Santa Maria, Rio Grande do Sul State, Brazil.
| | - Marília P Rippe
- Post-Graduate Program in Oral Science, Division of Prosthetic Dentistry, Federal University of Santa Maria, Marechal Floriano Peixoto Street 1184, 97015-372 Santa Maria, Rio Grande do Sul State, Brazil.
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Evaluation of the fracture resistance of root filled thin walled teeth restored with different post systems. Biomed J 2019; 42:53-58. [PMID: 30987706 PMCID: PMC6468162 DOI: 10.1016/j.bj.2018.12.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 12/12/2018] [Accepted: 12/14/2018] [Indexed: 11/29/2022] Open
Abstract
Background Restoration of the teeth with extensive root canals with different post systems is a challenge for clinicians. Evaluation of these systems is important for clinical success. The aim of this study was to compare the fracture resistance and fracture mode of endodontically treated thin-walled teeth which restored with different post systems. Methods Eighty extracted and endodontically treated maxillary canines were divided into 4 groups (n = 20) and the thickness of the radicular dentin walls was reduced by using diamond burs. Each root was embedded in an autopolymerizing resin with a 0.25 mm layer of vinyl polysiloxane material to simulate the periodontal ligament. The subgroups were restored with one of the following post systems: only composite resin (Group 1), cast post (Group 2), glass-fiber post (Group 3), and I-TFC post (Group 4). The samples were subjected to a gradually increasing force (0,5 mm/min). The force required to fracture was recorded, and the data were analyzed with ANOVA, Tukey test's and Chi–Square test (p < 0.05). Results The highest fracture resistance was recorded for Group 2, followed by the Group 3, Group 4, and Group 1. Differences in the fracture resistance of teeth were significant among the groups (p < 0.05). The fracture resistance of Group 4 was significantly different than the other tested post systems (p < 0.05). Conclusions The lowest fracture resistance was recorded for Group 1, but among all post systems, Group 4 had the lowest fracture resistance. The fracture mode of the fiber posts (Radix and I-TFC posts) would permit repair of the tooth.
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Shaikh SY, Shaikh SS. Direct Linear Measurement of Root Dentin Thickness and Dentin Volume Changes with Post Space Preparation: A Cone-Beam Computed Tomography Study. Contemp Clin Dent 2018; 9:77-82. [PMID: 29599589 PMCID: PMC5863415 DOI: 10.4103/ccd.ccd_785_17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: The purpose of the present study was direct linear measurement of dentin thickness and dentin volume changes for post space preparation with cone-beam computed tomography (CBCT). Materials and Methods: Ten maxillary central incisors were scanned, before and after root canal and post space preparation, with Orthophos XG three-dimensional hybrid unit. Thirteen axial section scans of each tooth from orifice to apex and dentin thickness for buccal, lingual, mesial, and distal were measured using proprietary measuring tool and thereafter subjected to statistical analysis. Furthermore, dentin volume was evaluated using ITK-SNAP software. Results: There was statistically significant difference between the dentin thickness in pre- and postinstrumentation (paired t-test) and also between different groups (one-way ANOVA). In the shortest post length of 4.5mm the post space preparation resulted in 2.17% loss of hard tissue volume, where as 11mm longest post length post space preparation resulted in >40% loss of hard tissue volume. Conclusion: CBCT axial section scan for direct measurements of root dentin thickness can be guideline before and after post space preparation for selection of drill length and diameter.
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Affiliation(s)
- Shoeb Yakub Shaikh
- Department of Conservative Dentistry and Endodontics, Rural Dental College, Pravara Institute of Medical Sciences, Loni, Maharashtra, India
| | - Safia Shoeb Shaikh
- Department of Oral Medicine and Radiology, Rural Dental College, Pravara Institute of Medical Sciences, Loni, Maharashtra, India
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Maroulakos G, He J, Nagy WW. The Post-endodontic Adhesive Interface: Theoretical Perspectives and Potential Flaws. J Endod 2018; 44:363-371. [PMID: 29306531 DOI: 10.1016/j.joen.2017.11.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 10/22/2017] [Accepted: 11/15/2017] [Indexed: 02/01/2023]
Abstract
INTRODUCTION The aim of this review was to analyze the potential of successful bonds of endodontic posts to radicular dentin as well as the limitations of the post-endodontic adhesive interface. METHODS The MEDLINE/PubMed and Web of Science electronic databases were searched. The search was augmented by a manual search of the pertinent bibliographies. RESULTS The post-endodontic adhesive interface finds application in the endodontic cohesive units. Many techniques and materials exist to improve the bond between endodontic posts and resin-based materials as well as between resin-based materials and radicular dentin. Different techniques used for the adhesion of metallic and fiber-reinforced posts are discussed and critically analyzed. CONCLUSIONS Although adhesive cementation of endodontic posts is popular, a long-term predictable bond may be compromised because of procedures related to the endodontic treatment and/or the adhesive cementation procedures. Microleakage and degradation phenomena may further jeopardize the post-endodontic adhesive interface.
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Affiliation(s)
- Georgios Maroulakos
- Department of General Dental Sciences, Marquette University School of Dentistry, Milwaukee, Wisconsin.
| | - Jianing He
- Department of Endodontics, Texas A&M University College of Dentistry, Dallas, Texas
| | - William W Nagy
- Department of Restorative Sciences, Texas A&M University College of Dentistry, Dallas, Texas
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Tsiagali V, Kirmanidou Y, Pissiotis A, Michalakis K. In Vitro Assessment of Retention and Resistance Failure Loads of Teeth Restored with a Complete Coverage Restoration and Different Core Materials. J Prosthodont 2017; 28:e229-e236. [PMID: 29143388 DOI: 10.1111/jopr.12668] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/15/2017] [Indexed: 11/28/2022] Open
Abstract
PURPOSE To investigate in vitro the retention and the resistance form, as well as the failure modes of maxillary premolars restored with cast metal crowns and different core materials. MATERIALS AND METHODS Sixty human extracted maxillary premolars were selected according to their size and were embedded in PMMA resin blocks. After removing a part of their clinical crowns, the teeth were randomly divided into 3 groups of 20 teeth and were either left unrestored, or they were restored with amalgam or composite resin. All teeth were prepared for a cast metal complete coverage restoration. The restorations were cemented on the prepared teeth with a resin-modified glass ionomer luting agent (GC Fuji Plus). All specimens were subjected to static loading at 1 mm/min by a universal testing machine, until failure. Half the specimens of each group were subjected to tensile loading along the long axis of the teeth. The other half were subjected to compressive loading at a 30° angle. Failure loads and failure modes for each tooth were recorded. The statistical analysis included descriptive statistics, one-way ANOVA, and Tukey's HSD test. RESULTS One-way ANOVA revealed statistically significant differences among the 3 tested groups (p < 0.05) for both tests. The group of teeth with no core material presented the highest failure loads for both the tensile and the compressive loading tests, with mean loads of 381.02 Ν and 741.21 Ν, respectively. Mean tensile and compressive failure loads for the amalgam group were 277.34 Ν and 584.75 Ν, while the composite resin group presented the lowest tensile and compressive failure values, which were 250.77 Ν and 465.78 Ν, respectively. The compression loading test resulted in the same failure mode for all specimens, which included unfavorable fracture of the teeth in combination with detachment of the cast metal complete coverage restorations. The tensile loading test resulted in different failure modes between the groups that used a core material and the group with no core material. CONCLUSIONS Teeth that lost more than half of their coronal structure presented better retention and resistance form if no core material was used, provided that a minimum of 2-mm axial wall height was present at the missing part. Teeth that have lost more than half of their coronal structure and were restored with amalgam core presented better retention and resistance form than those restored with composite resin. Catastrophic fractures, extending to the root, were associated with compression forces but not with tensile forces.
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Affiliation(s)
- Vasileia Tsiagali
- Hellenic Air Force Dental Corp, 251 General Air Force Hospital, Athens, Greece
| | - Yvoni Kirmanidou
- Department of Prosthodontics, Aristotle University School of Dentistry, Thessaloniki, Greece
| | - Argirios Pissiotis
- Department of Prosthodontics, Aristotle University School of Dentistry, Thessaloniki, Greece
| | - Konstantinos Michalakis
- Department of Prosthodontics, Aristotle University School of Dentistry, Thessaloniki, Greece.,Division of Graduate and Postgraduate Prosthodontics, Tufts University School of Dental Medicine, Boston, MA
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Jeaidi ZA. Fracture resistance of endodontically treated teeth restored with Zirconia filler containing composite core material and fiber posts. Pak J Med Sci 2017; 32:1474-1478. [PMID: 28083048 PMCID: PMC5216304 DOI: 10.12669/pjms.326.11282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Objectives: To assess the fracture resistance of endodontically treated teeth with a novel Zirconia (Zr) nano-particle filler containing bulk fill resin composite. Methods: Forty-five freshly extracted maxillary central incisors were endodontically treated using conventional step back preparation and warm lateral condensation filling. Post space preparation was performed using drills compatible for fiber posts (Rely X Fiber Post) on all teeth (n=45), and posts were cemented using self etch resin cement (Rely X Unicem). Samples were equally divided into three groups (n=15) based on the type of core materials, ZirconCore (ZC) MulticCore Flow (MC) and Luxacore Dual (LC). All specimens were mounted in acrylic resin and loads were applied (Universal testing machine) at 130° to the long axis of teeth, at a crosshead speed of 0.5 mm/min until failure. The loads and the site at which the failures occurred were recorded. Data obtained was tabulated and analyzed using a statistical program. The means and standard deviations were compared using ANOVA and Multiple comparisons test. Results: The lowest and highest failure loads were shown by groups LC (18.741±3.02) and MC (25.16±3.30) respectively. Group LC (18.741±3.02) showed significantly lower failure loads compared to groups ZC (23.02±4.21) and MC (25.16±3.30) (p<0.01). However groups ZC (23.02±4.21) and MC (25.16±3.30) showed comparable failure loads (p=0.23). Conclusions: Fracture resistance of endodontically treated teeth restored with Zr filler containing bulk fill composite cores was comparable to teeth restored with conventional Zr free bulk fill composites. Zr filled bulk fill composites are recommended for restoration of endodontically treated teeth as they show comparable fracture resistance to conventional composite materials with less catastrophic failures.
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Affiliation(s)
- Zaid Al Jeaidi
- Dr. Zaid Al Jeaidi, Assistant Professor, Conservative Dental Science Department, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
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19
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Ahmed SN, Donovan TE, Ghuman T. Survey of dentists to determine contemporary use of endodontic posts. J Prosthet Dent 2016; 117:642-645. [PMID: 27881309 DOI: 10.1016/j.prosdent.2016.08.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 08/04/2016] [Accepted: 08/04/2016] [Indexed: 11/15/2022]
Abstract
STATEMENT OF PROBLEM Although the scientific literature provides sound decision-making tools for the restoration of endodontically treated teeth, dentists have different opinions on the rationale for the use of endodontic posts (dowels) and selection of post systems. The decision to place a post is at times contrary to the literature. Updated information on the treatment of endodontically treated teeth among general dentists is lacking. PURPOSE The purpose of this survey was to gain insight into the rationale for choice of endodontic posts and the different endodontic post systems currently used by dental practitioners. Post and core restorations distribute stress and replace missing tooth structure in endodontically treated teeth. Guidelines exist to help select post systems. With the advent of new materials, prefabricated posts have gained popularity among dentists. However, cast-metal post-and-core systems are still considered the gold standard. MATERIAL AND METHODS Surveys were distributed to dentists attending continuing education meetings in the United States, Canada, Scotland, Ireland, and Greece. The questions addressed years of practice, specialty training, and brand, type, shape, and material of the endodontic post systems used. RESULTS Descriptive statistical analysis was used to assess the percentage of respondents. Ninety-two percent of the participants were general practitioners with 25.94 ±13.35 years of experience. The majority agreed upon using endodontic posts when insufficient coronal tooth structure remains and for stress distribution. Passive, parallel posts were the most commonly reported type and shape. With regard to post material, fiber posts were the most frequently used (72.2%), followed by prefabricated alloys (38.6%), cast-metal posts (33.9%), prefabricated titanium posts (30.1%), and stainless-steel posts (21.7%). For cementation, resin-modified glass ionomer (40%) was most frequently used, followed by self-adhesive resin (29.6%). CONCLUSIONS The majority of the practitioners used fiber posts. This may be because, in terms of fracture, they compare favorably with cast-metal post and core, although little evidence in the literature validates this claim.
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Affiliation(s)
- Sumitha N Ahmed
- Assistant Professor, Department of Operative Dentistry, School of Dentistry, University of North Carolina, Chapel Hill, NC.
| | - Terry E Donovan
- Professor and Section Chair, Biomaterials, Department of Operative Dentistry, School of Dentistry, University of North Carolina, Chapel Hill, NC
| | - Taneet Ghuman
- Clinical Assistant Professor, ECU School of Dental Medicine, Greenville, NC
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Al Jabbari YS, Fournelle R, Al Qhatani M, Zinelis S. Failure analysis of ParaPost drills that fractured in service: a retrieval analysis study. BIOMED ENG-BIOMED TE 2016; 61:537-542. [PMID: 26684349 DOI: 10.1515/bmt-2015-0138] [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: 07/12/2015] [Accepted: 10/22/2015] [Indexed: 11/15/2022]
Abstract
The aim was to determine the fracture mechanism of two clinically failed ParaPost drills. First, the fracture planes were analyzed by scanning electron microscopy (SEM). The drill end of one of the fractured pieces of each drill was then embedded in resin and after being metallographically ground and polished, was chemically etched. The microstructure and elemental composition were then examined by SEM/EDS analysis while hardness was determined with a Vickers testing device. Fractographic analysis revealed that both drills failed in a brittle manner and showed a pattern characteristic of a quasi-cleavage fracture mode. SEM and EDS analysis revealed a random distribution of a second phase enriched in Mo, W, and V, probably appended to (Mo, W, V)×C carbides, while the alloy composition is similar to M3 tool steel, a high-speed molybdenum tool steel. The microhardness of a ParaPost Drill #1 was found to be HV 862±29 and that for a Drill #2 was 846±16, with no significant differences (p>0.05). In both cases, fracture originated from surface points acting as stress concentrators and facilitating brittle fracture in the quasi-cleavage mode indicating that failure rate might be further minimized by a better instrument design.
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Yaman SD, Karacaer O, Sahin M. Stress Distribution of Post–Core Applications in Maxillary Central Incisors. J Biomater Appl 2016; 18:163-77. [PMID: 14871043 DOI: 10.1177/0885328204034745] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The purpose of this study was to evaluate the stress distribution in a maxillary central incisor restored with various post–core applications. The study used a three-dimensional finite element method. The tooth was assumed to be endodontically treated with a porcelain crown. Two different sizes of Flexi-post, Cera-post, and Composipost were compared for 200 N palatal and incisal loads. It was determined that, purely from the point of view of strength considerations, core material was determined to be of greater importance than post material or size. Higher elastic moduli of the posts resulted in lower stresses throughout the tooth.
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Affiliation(s)
- Sis Darendeliler Yaman
- Department of Restorative Dentistry and Endodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
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McReynolds D, Duane B. Insufficient evidence on whether to restore root-filled teeth with single crowns or routine fillings. Evid Based Dent 2016; 17:50-51. [PMID: 27339239 DOI: 10.1038/sj.ebd.6401170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Data sourcesMedline, Cochrane Oral Health Groups Trials Register, Cochrane Central Register of Controlled Trials, Embase, CINAHL, LILACS.Study selectionThree authors independently assessed the abstracts of studies resulting from the above searches which compared indirect restorations of single endodontically treated teeth (ETT) to direct restoration of single ETT.Data extraction and synthesisTitles and abstracts of all reports identified through the electronic searches were assessed independently by two authors with any disagreements on eligibility resolved by a third reviewing author based on agreed upon inclusion and exclusion criteria. Study quality was assessed using the Cochrane risk of bias tool. Catastrophic failure of the restored tooth or restoration leading directly to extraction was the primary outcome measure. Secondary outcome measures included patient quality of life, incidence of recurring caries, periodontal health status and cost of the use of different interventions. Data analysis was carried out using the, 'treatment as allocated', patient population, expressing estimates of intervention effect for dichotomous data as risk ratios, with 95% confidence intervals (CI).ResultsOne trial which was judged to be at high risk of performance, detection and attrition bias was included. There was no clear difference between the crown and composite group and the composite only group for non-catastrophic failures of the restoration (1/54 versus 3/53; RR 0.33; 95% CI 0.04 to 3.05) or failures of the post (2/54 versus 1/53; RR 1.96; 95% CI 0.18 to 21.01) at three years. The quality of the evidence for these outcomes was judged to be very low. There was no evidence available for any secondary outcomes.ConclusionsInsufficient evidence exists to assess the effects of crowns compared to conventional fillings for the restoration of root-filled teeth. Until more evidence becomes available, clinicians should continue to base decisions about how to restore root-filled teeth on their own clinical experience, whilst taking into consideration the individual circumstances and preferences of their patients.
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Affiliation(s)
| | - Brett Duane
- Dublin Dental University Hospital, Dublin, Eire
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23
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Martin W, Taylor C, Jawad S, Roudsari RV, Darcey J, Qualtrough A. Modern Endodontic Principles Part 7: The Restorative Interface. DENTAL UPDATE 2016; 43:319-334. [PMID: 29148685 DOI: 10.12968/denu.2016.43.4.319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The restoration of endodontically-treated teeth is a topic that has been extensively studied and yet remains controversial. The endodontically-treated tooth can be restored with a wide range of techniques of varying complexity. This article reviews the literature on this topic. Consideration is given to the ferrule and its importance in achieving success. Furthermore, consideration will be given to the use of endodontically-treated teeth as abutments for fixed and removable prostheses and the challenges this presents. Clinical recommendations are presented as guidelines to improve the predictability and outcome of treatment when restoring structurally compromised root-filled teeth. Clinical relevance: The prognosis of endodontically-treated teeth depends not only on the success of the endodontic treatment, but also on the type of reconstruction.
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Rosen E, Beitlitum I, Tamse A, Taschieri S, Tsesis I. Implant-associated Vertical Root Fracture in Adjacent Endodontically Treated Teeth: A Case Series and Systematic Review. J Endod 2016; 42:948-52. [PMID: 27106717 DOI: 10.1016/j.joen.2016.03.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Revised: 03/22/2016] [Accepted: 03/27/2016] [Indexed: 01/23/2023]
Abstract
INTRODUCTION This study aimed to report a possible effect of the presence of an adjacent implant on the development of a vertical root fracture (VRF) in endodontically treated teeth. METHODS A series of 8 cases in 7 patients with teeth diagnosed with VRF after the placement of implants in the adjacent area is described and analyzed. In addition, a comprehensive literature search with strict inclusion and exclusion criteria was undertaken to identify additional clinical studies that assessed this clinical scenario. RESULTS The case series analysis revealed that the time from implant placement to the diagnosis of VRF was between 5 and 28 months (average = 11 months). The majority of cases occurred in female patients who received 2 or more implants. Six of the 7 patients were older than 40 years, with an average age of 54 years. The majority of teeth with VRF were premolar or mandibular molar teeth (6/8 teeth). All fractured teeth had been restored with a crown and had a post present, and the quality of the root canal filling was determined to be adequate. The systematic review revealed that implant-associated VRF has not been investigated or reported in the literature yet. CONCLUSIONS Based on a systematic review of the literature, this case series, although limited in its extent, is the first clinical report of a possible serious adverse event of implant-associated VRF in adjacent endodontically treated teeth. Additional clinical studies are indicated to shed light on this potential phenomenon.
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Affiliation(s)
- Eyal Rosen
- Department of Endodontology, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
| | - Ilan Beitlitum
- Department of Periodontology and Dental Implantology, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Aviad Tamse
- Department of Endodontology, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Silvio Taschieri
- Department of Biomedical, Surgical and Dental Sciences, Research Centre in Oral Health, Università degli Studi di Milano, Milan, Italy; IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
| | - Igor Tsesis
- Department of Endodontology, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
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Memarpour M, Derafshi R, Razavi M. Comparison of microleakage from stainless steel crowns margins used with different restorative materials: An in vitro study. Dent Res J (Isfahan) 2016; 13:7-12. [PMID: 26962309 PMCID: PMC4770474 DOI: 10.4103/1735-3327.174689] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background: Obtaining optimal marginal adaption with prefabricated stainless steel crowns (SSCs) is difficult, especially after removing dental caries or defects in cervical areas. This situation requires the use of an SSC after tooth reconstruction. This study evaluated microleakage and material loss with five restorative materials at SSC margins. Materials and Methods: One hundred and twenty primary molar teeth were randomly divided into six groups (n = 20). Class V cavities were prepared on the buccal surfaces of the teeth in groups 1-5. Cavities were restored with amalgam, resin-based composite, glass ionomer (GI), zinc phosphate, or reinforced zinc oxide eugenol (Zonalin). Group 6 without cavity preparation was used as a control. Restorations with SSCs were prepared according to standard methods. Then, SSCs were fitted so that the crown margins overlaid the restorative materials and cemented with GI. After thermocycling, the specimens were placed in 0.5% fuchsin and sectioned. The proportions of mircoleakage and material loss were evaluated with a digital microscope. Statistical analysis was performed with Kruskal–Wallis and Mann–Whitney tests. Results: The groups differed significantly (P < 0.001). Amalgam and GI showed the least microleakage. Amalgam restorations had significantly less microleakage than the other materials (P < 0.05). Microleakage was greatest with resin-based composite, followed by Zonalin. Material loss was greater in samples restored with Zonalin and zinc phosphate. Conclusion: When SSC margins overlaid the restoration materials, cavity restoration with amalgam or GI before SSC placement led to less microleakage and material loss. Regarding microleakage and material loss, resin-based composite, zinc phosphate, and Zonalin were not suitable options.
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Affiliation(s)
- Mahtab Memarpour
- Department of Pediatric Dentistry, Prevention of Oral and Dental Disease Research Center, Shiraz, Iran
| | - Reza Derafshi
- Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mahshid Razavi
- Department of Pediatric Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
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Moraes AP, Sarkis-Onofre R, Moraes RR, Cenci MS, Soares CJ, Pereira-Cenci T. Can Silanization Increase the Retention of Glass-fiber posts? A Systematic Review and Meta-analysis of In Vitro Studies. Oper Dent 2015; 40:567-80. [PMID: 26151460 DOI: 10.2341/14-330-o] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The role of silanes in the bonding of resin luting agents to glass-fiber posts (GFPs) is a controversial topic, and the question still remains whether post silanization is able to improve the retention of GFPs luted into root canals. Thus, this study was designed to determine whether evidence exists to justify silanization of GFPs before cementation to increase their retention into root canals. In vitro studies that evaluated the retention of GFPs cemented into root canals or artificial substrates and that used silane coupling agents for pretreatment of the post were selected. Searches were carried out in PubMed and Scopus databases with no publication year or language limits. The last search was carried out in August 2014. Two distinct data analyses were carried out: 1) control group (no post pretreatment) vs silane only and 2) post pretreatment + silane vs silane only. Pooled-effect estimates were obtained by comparing the difference between each bond strength mean value and were expressed as the weighted mean difference between groups (p≤0.05). A total of 178 articles were found, and 23 were included in the review. The results were affected by the substrate into which the GFPs were luted (teeth or artificial devices). The analysis between control group and silane only for studies that used artificial devices favored the use of silane (p<0.0001), but considering studies that used teeth as substrate, no significant difference was observed (p=0.35). The analysis between silane only and pretreatment + silane did not show a significant difference between groups when artificial devices were used (p=0.71), whereas the analysis favored the use of post pretreatment + silane over silane (p<0.00001) only when the GFPs were luted into teeth. In conclusion, this review indicates that silanization improves the retention of GFPs luted into root canals provided that selective surface pretreatments are applied to the post before silanization.
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Kumar L, Pal B, Pujari P. An assessment of fracture resistance of three composite resin core build-up materials on three prefabricated non-metallic posts, cemented in endodontically treated teeth: an in vitrostudy. PeerJ 2015; 3:e795. [PMID: 25755926 PMCID: PMC4349048 DOI: 10.7717/peerj.795] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 02/04/2015] [Indexed: 11/20/2022] Open
Abstract
Endodontically treated teeth with excessive loss of tooth structure would require to be restored with post and core to enhance the strength and durability of the tooth and to achieve retention for the restoration. The non-metallic posts have a superior aesthetic quality. Various core build-up materials can be used to build-up cores on the posts placed in endodontically treated teeth. These materials would show variation in their bonding with the non-metallic posts thus affecting the strength and resistance to fracture of the remaining tooth structure. Aims. The aim of the study was to assess the fracture resistance of three composite resin core build-up materials on three prefabricated non-metallic posts, cemented in extracted endodontically treated teeth. Material and Methods. Forty-five freshly extracted maxillary central incisors of approximately of the same size and shape were selected for the study. They were divided randomly into 3 groups of 15 each, depending on the types of non-metallic posts used. Each group was further divided into 3 groups (A, B and C) of 5 samples each depending on three core build-up material used. Student’s unpaired ‘t’ test was also used to analyse and compare each group with the other groups individually, and decide whether their comparisons were statistically significant. Results. Luxacore showed the highest fracture resistance among the three core build-up materials with all the three posts systems. Ti-core had intermediate values of fracture resistance and Lumiglass had the least values of fracture resistance.
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Affiliation(s)
- Lalit Kumar
- Department of Prosthodontics, Dr. Harvansh Singh Judge Institute of Dental Sciences and Hospital, Punjab University, Chandigarh, India
| | - Bhupinder Pal
- Consultant Maxillofacial Prosthodontist & Implantologist, Barnala, Punjab, India
| | - Prashant Pujari
- Department of Orthodontics, Pacific Dental College, Udaipur, Rajasthan, India
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Oyar P. The effects of post-core and crown material and luting agents on stress distribution in tooth restorations. J Prosthet Dent 2014; 112:211-9. [PMID: 24560984 DOI: 10.1016/j.prosdent.2013.10.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 10/02/2013] [Accepted: 10/02/2013] [Indexed: 11/15/2022]
Affiliation(s)
- Perihan Oyar
- Assistant Professor, Dental Prosthetics Technology Programme, School of Health Services, Hacettepe University, Ankara, Turkey.
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Pereira JR, Rosa RAD, Só MVR, Afonso D, Kuga MC, Honório HM, Valle ALD, Vidotti HA. Push-out bond strength of fiber posts to root dentin using glass ionomer and resin modified glass ionomer cements. J Appl Oral Sci 2014; 22:390-6. [PMID: 25004052 PMCID: PMC4245750 DOI: 10.1590/1678-775720130466] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 03/31/2014] [Indexed: 11/22/2022] Open
Abstract
Objective The purpose of this study was to assess the push-out bond strength of glass fiber
posts to root dentin after cementation with glass ionomer (GICs) and
resin-modified glass ionomer cements (RMGICs). Material and Methods Fifty human maxillary canines were transversally sectioned at 15 mm from the apex.
Canals were prepared with a step back technique until the application of a #55
K-file and filled. Post spaces were prepared and specimens were divided into five
groups according to the cement used for post cementation: Luting & Lining
Cement; Fuji II LC Improved; RelyX Luting; Ketac Cem; and Ionoseal. After
cementation of the glass fiber posts, all roots were stored at 100% humidity until
testing. For push-out test, 1-mm thick slices were produced. The push-out test was
performed in a universal testing machine at a crosshead speed of 0.5 mm/minute and
the values (MPa) were analyzed by Kolmogorov-Smirnov and Levene's tests and by
two-way ANOVA and Tukey's post hoc test at a significance level
of 5%. Results Fiber posts cemented using Luting & Lining Cement, Fuji II LC Improved, and
Ketac Cem presented the highest bond strength to root dentin, followed by RelyX
Luting. Ionoseal presented the lowest bond strength values (P>0.05). The post
level did not influence the bond strength of fiber posts to root dentin (P=0.148).
The major cause of failure was cohesive at the cement for all GICs and RMGICs. Conclusions Except for Ionoseal, all cements provided satisfactory bond strength values.
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Affiliation(s)
| | - Ricardo Abreu da Rosa
- Department of Conservative Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Marcus Vinícius Reis Só
- Department of Conservative Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Daniele Afonso
- University of Southern Santa Catarina, Tubarão, SC, Brazil
| | - Milton Carlos Kuga
- Department of Endodontics, School of Dentistry, Univ. Estadual Paulista, Araraquara, SP, Brazil
| | - Heitor Marques Honório
- Department of Pediatric Dentistry, Orthodontics and Community Health, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Accácio Lins do Valle
- Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Hugo Alberto Vidotti
- Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
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Ozcan N, Sahin E. In vitro evaluation of the fracture strength of all-ceramic core materials on zirconium posts. Eur J Dent 2014; 7:455-460. [PMID: 24932121 PMCID: PMC4053671 DOI: 10.4103/1305-7456.120671] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Objective: For most endodontically treated teeth, tooth-colored post-core systems are preferable for esthetic reasons. Therefore, improvements in material strength must also consider tooth colored post-core complexes. The objective of this study was to evaluate the difference in tooth colored post–core complex strengths. Materials and Methods: A total of 33 human maxillary central incisor teeth were used for this study, with three groups of 11 teeth. Three different methods were used to fabricate all-ceramic post-core restorations: zirconia blanks, Cerec 3D-milled to one-piece post-core restorations (Test Group 1); feldspathic cores (from feldspathic prefabricated CAD/CAM blocks) adhesively luted to CosmoPost zirconia posts (Test Group 2); and IPS Empress cores directly pressed to CosmoPost zirconia posts (Test Group 3). All-ceramic crowns from feldspathic ceramic were constructed using a CAD/CAM system (Cerec 3D) for all specimens. The post-core complexes were tested to failure with the load applied at 45° angled relative to the tooth long axis. The load at fracture was recorded. Results: The maximum fracture strength of the milled zirconia cores (Test Group 1) was 577 N; corresponding values for the milled feldspathic cores (Test Group 2) and the pressed cores (Test Group 3) were 586 and 585 N, respectively. Differences were not statistically significant at P < 0.05 (P = 0.669). Conclusions: All-ceramic cores adhesively luted on zirconia posts and one-piece all-ceramic zirconium post–core structures offer a viable alternative to conventional pressing.
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Affiliation(s)
- Nihal Ozcan
- Department of Prosthodontics, Faculty of Dentistry, Kirikkale University, Kirikkale, Turkiye
| | - Erdal Sahin
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkiye
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31
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Nair KC. Prosthodontic Treatment Preferences in Post Independent India: An over View. J Indian Prosthodont Soc 2014; 13:68-70. [PMID: 24431712 DOI: 10.1007/s13191-013-0281-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Accepted: 03/19/2013] [Indexed: 11/26/2022] Open
Abstract
Indian prosthodontics do not have a chronological document. This article is an attempt to record the event based prosthodontic history of India. This is a starting point.
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32
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Habib SR, Al Rifaiy MQ, Alkunain J, Alhasan M, Albahrani J. Concepts of restoring endodontically treated teeth among dentists in Saudi Arabia. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.ksujds.2013.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Farid F, Mahgoli H, Hosseini A, Chiniforush N. Effect of eugenol-containing and resin endodontic sealers on retention of prefabricated metal posts cemented with zinc phosphate and resin cements. J Prosthodont Res 2013; 57:284-7. [DOI: 10.1016/j.jpor.2013.08.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 07/29/2013] [Accepted: 08/21/2013] [Indexed: 11/17/2022]
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Skupien JA, Opdam N, Winnen R, Bronkhorst E, Kreulen C, Pereira-Cenci T, Huysmans MC. A practice-based study on the survival of restored endodontically treated teeth. J Endod 2013; 39:1335-40. [PMID: 24139251 DOI: 10.1016/j.joen.2013.06.028] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 05/28/2013] [Accepted: 06/09/2013] [Indexed: 11/27/2022]
Abstract
INTRODUCTION This retrospective study evaluated the survival of endodontically treated teeth (ETTs) and investigated factors influencing restoration and tooth survival. METHODS Data from 795 ETTs were recorded, and success (restoration still intact) and survival (restoration intact or failed/repaired/replaced and tooth still in situ) were analyzed using Kaplan-Meier statistics. A multivariate Cox regression analysis was performed to assess the variables influencing success and survival. RESULTS At the end of the observation period (mean observation time = 4.48 years), 45 teeth had been extracted (annual failure rate for survival = 1.9% at 9.6 years) and 114 restorations had received a restorative follow-up treatment (annual failure rate for success = 4.9% at 9.6 years). CONCLUSIONS ETTs showed acceptable survival and success in the long-term. Variables showing significant influence on survival were the number of teeth in the dentition and the presence of decay at the moment the patient entered the practice.
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Affiliation(s)
- Jovito Adiel Skupien
- Department of Preventive and Restorative Dentistry, College of Dental Science, Radboud University, Nijmegen Medical Centre, Nijmegen, The Netherlands; Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.
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35
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Carlini-Júnior B, Cecchin D, Farina AP, Pereira GDS, Prieto LT, Paulillo LAMS. Influence of remaining coronal structure and of the marginal design on the fracture strength of roots restored with cast post and core. Acta Odontol Scand 2013; 71:278-82. [PMID: 23256646 DOI: 10.3109/00016357.2012.671492] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The purpose of this study was to evaluate the fracture strength of roots that were prosthetically restored with cast post and core with or without any remaining coronal structure and with different finish lines. MATERIALS AND METHODS Sixty bovine incisors were sectioned below the cementoenamel junction, endodontically treated and randomly divided into six experimental groups (n = 10) containing teeth with or without any remaining coronal structure and with a beveled shoulder, a chanfered or a shoulder finish line design. The cast post and core were luted with dual-cured resin cement. The metal crowns were cemented with zinc phosphate cement. The specimens were subjected to a tangential compressive load (135° angle) at a crosshead speed of 0.5 mm/min until failure, using a universal testing machine. The fracture strength data were analyzed using the ANOVA and LSMeans (least square means) tests (α = 0.05). RESULTS The data indicated that the teeth with 2 mm of remaining coronal structure showed the highest fracture strength values when compared with the teeth without any remaining structure (p < 0.05). As to the different finish line designs, the highest fracture strength values were obtained for the beveled shoulder, followed by the chanfered and then by the shoulder designs (p < 0.05). CONCLUSIONS It may be concluded that, to increase fracture strength, a beveled shoulder and 2 mm of remaining coronal structure are the ideal conditions.
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Affiliation(s)
- Bruno Carlini-Júnior
- Department of Restorative Dentistry, Passo Fundo Dental School, University of Passo Fundo, Passo Fundo, RS, Brazil
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36
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Iglesias MAL, Mesquita GC, Pereira AG, Dantas LCDM, Raposo LHA, Soares CJ, Mota ASD. Influence of core-finishing intervals on tensile strength of cast posts-and-cores luted with zinc phosphate cement. Braz Oral Res 2012; 26:378-83. [PMID: 22790502 DOI: 10.1590/s1806-83242012000400016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Accepted: 05/16/2012] [Indexed: 11/22/2022] Open
Abstract
The core finishing of cast posts-and-cores after luting is routine in dental practice. However, the effects of the vibrations produced by the rotary cutting instruments over the luting cements are not well-documented. This study evaluated the influence of the time intervals that elapsed between the cementation and the core-finishing procedures on the tensile strength of cast posts-and-cores luted with zinc phosphate cement. Forty-eight bovine incisor roots were selected, endodontically treated, and divided into four groups (n = 12): GA, control (without finishing); GB, GC, and GD, subjected to finishing at 20 minutes, 60 minutes, and 24 hours after cementation, respectively. Root canals were molded, and the resin patterns were cast in copper-aluminum alloy. Cast posts-and-cores were luted with zinc phosphate cement, and the core-finishing procedures were applied according to the groups. The tensile tests were performed at a crosshead speed of 0.5 mm/min for all groups, 24 hours after the core-finishing procedures. The data were subjected to one-way analysis of variance (ANOVA) and Tukey's test (α = 0.05). No significant differences were observed in the tensile strengths between the control and experimental groups, regardless of the time interval that elapsed between the luting and finishing steps. Within the limitations of the present study, it was demonstrated that the core-finishing procedures and time intervals that elapsed after luting did not appear to affect the retention of cast posts-and-cores when zinc phosphate cement was used.
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Affiliation(s)
- Michele Andrea Lopes Iglesias
- Department of Occlusion, Fixed Prosthodontics and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil
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Bolay Ş, Öztürk E, Tuncel B, Ertan A. Fracture resistance of endodontically treated teeth restored with or without post systems. J Dent Sci 2012. [DOI: 10.1016/j.jds.2012.03.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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38
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Yousif Marghalani T, Tharwat Hamed M, Abdelmageed Awad M, Hussein Naguib G, Fouad Elragi A. Three-Dimensional Finite Element Analysis of Custom-Made Ceramic Dowel Made Using CAD/CAM Technology. J Prosthodont 2012; 21:440-50. [DOI: 10.1111/j.1532-849x.2012.00860.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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39
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Proposal of an innovative benchmark for accuracy evaluation of dental crown manufacturing. Comput Biol Med 2012; 42:548-55. [DOI: 10.1016/j.compbiomed.2012.01.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2011] [Revised: 12/22/2011] [Accepted: 01/25/2012] [Indexed: 11/21/2022]
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40
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Castro CG, Santana FR, Roscoe MG, Simamoto PC, Santos-Filho PCF, Soares CJ. Fracture resistance and mode of failure of various types of root filled teeth. Int Endod J 2012; 45:840-7. [PMID: 22486728 DOI: 10.1111/j.1365-2591.2012.02041.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
AIM To investigate ex vivo the influence of the post system on fracture resistance and failure mode of root filled incisor, canine, premolar and molar teeth. METHODOLOGY Eighty human teeth were divided into eight groups (n = 10) resulting from the interaction between the two study factors: post system (glass fibre post; cast Ni-Cr alloy post and core) and type of tooth (maxillary incisors, maxillary canines, maxillary premolars and mandibular molars). All roots were prepared with a 2-mm ferrule and restored with metal crown. Fracture resistance (N) was assessed in a mechanical testing device, and the data were analysed by two-way anova (4 × 2) followed by Tukey's test (α = 0.05). The failure mode was evaluated using an optical stereomicroscope and classified according to the location of the failure. Failure mode data were analysed by two-factor anova and Student-Newman-Keuls (SNK) tests (α = 0.05). Correlation between fracture resistance and failure mode was analysed by linear regression. RESULTS Glass fibre and cast posts and cores had similar fracture resistance, regardless of the type of tooth. Canines and molars had significantly higher fracture resistance (P < 0.001) than premolars. Incisors teeth had significantly lower fracture resistance (P < 0.001) than premolars. The fracture mode for incisors, premolars and molars was more amenable to restoration when the teeth were restored with glass fibre posts. Fracture resistance had no correlation with fracture mode, regardless of the post system and type of tooth analysed. CONCLUSIONS Post system had no significant effect on fracture resistance, regardless of the type of tooth. The mode of fracture was more restorable with glass fibre posts.
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Affiliation(s)
- C G Castro
- Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
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41
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Kumar M, Viswambaran M, Awasthi P, Dabra T. Enhanced aesthetics with metal-free ceramics and post systems-case reports. Med J Armed Forces India 2012; 68:179-81. [PMID: 24669063 DOI: 10.1016/s0377-1237(12)60027-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Accepted: 09/06/2011] [Indexed: 11/26/2022] Open
Affiliation(s)
- Manjit Kumar
- Professor & Head (Prosthodontics), Genesis Institute of Dental Sciences and Research, Moga Road, Ferozepur
| | - M Viswambaran
- Associate Professor, Department of Dental Surgery, AFMC, Pune - 40
| | | | - Tarun Dabra
- Graded Specialist (Prosthodontics), 2 Corps Dental Unit, C/o 56 APO
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42
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Juloski J, Radovic I, Goracci C, Vulicevic ZR, Ferrari M. Ferrule Effect: A Literature Review. J Endod 2012; 38:11-9. [PMID: 22152612 DOI: 10.1016/j.joen.2011.09.024] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 09/26/2011] [Accepted: 09/30/2011] [Indexed: 01/21/2023]
Affiliation(s)
- Jelena Juloski
- Department of Fixed Prosthodontics and Dental Materials of Siena, Tuscan School of Dental Medicine, University of Florence and Siena, Siena, Italy.
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Carlini B, Cecchin D, Pereira GDDS, Paulillo LAMS. Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts. Braz Oral Res 2011; 25:345-50. [PMID: 21860923 DOI: 10.1590/s1806-83242011000400011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Accepted: 04/25/2011] [Indexed: 11/22/2022] Open
Abstract
The purpose of this study was to evaluate the fracture strength of roots that were prosthetically restored with metallic posts with or without any remaining coronal structure and with different finish lines. Sixty bovine incisors were sectioned below the cementoenamel junction, endodontically treated, and randomly divided into six experimental groups (n = 10) containing teeth with or without any remaining coronal structure, and with a beveled shoulder, a bevel, or a shoulder finish line design. The metallic posts were luted with dual-cured resin cement. The cores were made with composite resin, and metal crowns were cemented with zinc phosphate cement. The specimens were subjected to a tangential compressive load (135º angle) at a crosshead speed of 0.5 mm/min until failure, using a universal testing machine. The fracture strength data were analyzed using the ANOVA and LSMeans (least square means) tests (α= 0.05). The data indicated that the teeth with 2 mm of remaining coronal structure showed the highest fracture strength values when compared with the teeth without any remaining structure (p < 0.05). As to the different finish line designs, the highest fracture strength values were obtained for the beveled shoulder, followed by the bevel and then by the shoulder designs (p < 0.05). It may be concluded that, to increase fracture strength, a beveled shoulder and 2 mm of remaining coronal structure are the ideal conditions.
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Affiliation(s)
- Bruno Carlini
- Department of Restorative Dentistry, Passo Fundo Dental School, University of Passo Fundo, Passo Fundo, RS, Brazil
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44
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Mizrahi B. Modified Complete-Arch Impression Technique for Facilitating Esthetic and Biomechanical Precision in Complete-Arch Rehabilitation. J Prosthodont 2011; 20:474-87. [DOI: 10.1111/j.1532-849x.2011.00747.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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45
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Peutzfeldt A, Sahafi A, Flury S. Bonding of restorative materials to dentin with various luting agents. Oper Dent 2011; 36:266-73. [PMID: 21740244 DOI: 10.2341/10-236-l] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The aim was to compare eight types of luting agents when used to bond six indirect, laboratory restorative materials to dentin. Cylinders of the six restorative materials (Esteticor Avenir [gold alloy], Tritan [titanium], NobelRondo [feldspathic porcelain], Finesse All-Ceramic [leucite-glass ceramic], Lava [zirconia], and Sinfony [resin composite]) were ground and air-abraded. Cylinders of feldspathic porcelain and glass ceramic were additionally etched with hydrofluoric acid and were silane-treated. The cylinders were luted to ground human dentin with eight luting agents (DeTrey Zinc [zinc phosphate cement], Fuji I [conventional glass ionomer cement], Fuji Plus [resin-modified glass ionomer cement], Variolink II [conventional etch-and-rinse resin cement], Panavia F2.0 and Multilink [self-etch resin cements], and RelyX Unicem Aplicap and Maxcem [self-adhesive resin cements]). After water storage at 37°C for one week, the shear bond strength of the specimens (n=8/group) was measured, and the fracture mode was stereomicroscopically examined. Bond strength data were analyzed with two-factorial analysis of variance (ANOVA) followed by Newman-Keuls' Multiple Range Test (α=0.05). Both the restorative material and the luting agent had a significant effect on bond strength, and significant interaction was noted between the two variables. Zinc phosphate cement and glass ionomer cements produced the lowest bond strengths, whereas the highest bond strengths were found with the two self-etch and one of the self-adhesive resin cements. Generally, the fracture mode varied markedly with the restorative material. The luting agents had a bigger influence on bond strength between restorative materials and dentin than was seen with the restorative material.
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Affiliation(s)
- A Peutzfeldt
- Department of Preventive, Restorative and Pediatric Dentistry, University of Bern, Bern, Switzerland.
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Trushkowsky RD. Esthetic and functional consideration in restoring endodontically treated teeth. Dent Clin North Am 2011; 55:403-x. [PMID: 21474001 DOI: 10.1016/j.cden.2011.01.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The selection of the best restoration for an endodontically treated tooth in the aesthetic zone depends on strength and the ability to recreate the form, function, and aesthetics of the natural tooth. The increased use of all-ceramic materials is a result of improved ceramic materials and adhesive systems. However, the advent of the current variety of translucent ceramic systems makes the shade of the abutment important in achieving the desired aesthetic outcome. This article discusses the different types of posts used in the restoration.
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Affiliation(s)
- Richard D Trushkowsky
- Department of Cariology and Comprehensive Care, New York University College of Dentistry, 345 East 24th Street, New York, NY 10010, USA.
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Santana FR, Castro CG, Simamoto-Júnior PC, Soares PV, Quagliatto PS, Estrela C, Soares CJ. Influence of post system and remaining coronal tooth tissue on biomechanical behaviour of root filled molar teeth. Int Endod J 2011; 44:386-94. [DOI: 10.1111/j.1365-2591.2010.01807.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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NOTHDURFT FP, SCHMITT T, RUPF S, POSPIECH PR. Influence of fatigue testing and cementation mode on the load-bearing capability of bovine incisors restored with crowns and FRC posts. Dent Mater J 2011; 30:109-14. [DOI: 10.4012/dmj.2010-069] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Uy JN, Neo JCL, Chan SH. The effect of tooth and foundation restoration heights on the load fatigue performance of cast crowns. J Prosthet Dent 2010; 104:318-24. [PMID: 20970538 DOI: 10.1016/s0022-3913(10)60147-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
STATEMENT OF PROBLEM In badly damaged teeth and teeth with short clinical crown heights, the placement of foundation restorations has been advocated to permit the development of retention and resistance form. However, there is little information on the effect of these foundation restorations on the clinical performance of the definitive restoration. PURPOSE The purpose of this study was to evaluate the load fatigue performance of teeth restored with posts and cores, with varying tooth heights, and to compare them with similar groups having no posts and cores. A secondary purpose was to determine whether a critical tooth height existed at which the placement of a foundation restoration resulted in no significant difference in the load fatigue performance. MATERIAL AND METHODS Three test groups (n=10) with prepared tooth heights of 2, 3, and 4 mm were tested. These were compared with another 3 groups with similar tooth heights that were restored with prefabricated titanium posts and core heights of 4, 3, and 2 mm, respectively. Cast complete crowns were then fabricated and cemented with zinc phosphate cement. A fatigue load of 58.8 N was applied at an angle of 135 degrees to the long axis of each crown-tooth specimen. The number of cycles to preliminary failure was determined. Significant differences in cycles to preliminary failure were assessed with 1-way ANOVA, followed by Tukey HSD tests (α=.05). RESULTS The group with the greatest preparation height (4 mm) and a 2-mm post-retained foundation had the highest number of cycles to preliminary failure (437,701), while the group with the shortest preparation height and no foundation had the lowest number of cycles (53,806). The Tukey HSD multiple comparison tests showed that for all 3 tooth heights, groups with foundation restorations had a significantly higher number of cycles to preliminary failure than those without foundation restorations. CONCLUSIONS For a given tooth height, teeth restored with foundation restorations had a significantly better load fatigue performance than those with no foundation restoration.
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Affiliation(s)
- Joanne N Uy
- Department of Restorative Dentistry, Faculty of Dentistry, National University of Singapore, Singapore.
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