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Kalakijuybari FZ, Pasdar N, Ahmadi G, Seyedmajidi A. Investigating the impact of flowable composite liner on the fracture strength and microleakage of large composite resin restorations of primary anterior teeth. Eur Arch Paediatr Dent 2023:10.1007/s40368-023-00812-3. [PMID: 37341920 DOI: 10.1007/s40368-023-00812-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 06/02/2023] [Indexed: 06/22/2023]
Abstract
PURPOSE To investigate the effect of pre-cured and co-cured flowable composite liner on fracture strength and microleakage of primary anterior teeth with extended composite resin restorations. METHODS In the current in vitro experimental study, the crowns of 54 extracted primary canine teeth were cut 1 mm above the CEJ, and a pulpectomy procedure was performed. The samples were randomly divided into three groups to restore the coronal part up to 4 mm above the CEJ. In group 1, the samples were built up with Filtek Z250 packable composite resin. In group 2 (pre-cure), first, 1 mm of Filtek Z350 XT flowable liner was applied to the sample, and after curing, the restoration process continued using packable composite resin. In group 3 (co-cure), the flowable composite liner was cured while the first layer of packable composite resin was applied; then, the same restorative procedure similar to the other groups was followed. The samples' cross-sectional area in the fracture strength test was calculated by AutoCAD software. Subsequently, the samples were subjected to a force in a universal testing machine. The samples related to the microleakage experiment were cut vertically, and then, the dye penetration percentage (10% methylene blue) was measured under a stereomicroscope. ANOVA was used to analyze the data. RESULTS Mean fracture strength in group 2 was significantly higher than in group 1 (P = 0.016). The microleakage mean in group 3 was significantly lower than in groups 1 (P = 0.000) and 2 (P = 0.026). CONCLUSION The flowable composite liner and its relevant separate curing increased the fracture strength of composite resin restorations. However, less microleakage was reported in the group where the liner was applied as a co-cure.
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Affiliation(s)
- F Z Kalakijuybari
- Student Research Committee, Babol University of Medical Sciences, Babol, Iran.
| | - N Pasdar
- Dental Materials Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - G Ahmadi
- Oral Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - A Seyedmajidi
- Dental Materials Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
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Santos Pantaleón D, Valenzuela FM, Morrow BR, Pameijer CH, García-Godoy F. Effect of Cervical Lesions on Fracture Resistance and Failure Mode of Maxillary Central Incisors Restored with Fiber Posts and Complete Crowns. Oper Dent 2021; 46:669-679. [PMID: 35507904 DOI: 10.2341/20-164-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2021] [Indexed: 11/23/2022]
Abstract
PURPOSE To investigate the effect of a cervical cavity extending 1 mm apical to the cemento-enamel junction (CEJ) on fracture resistance and failure mode of maxillary central incisors that have been treated endodontically, present with complete and incomplete ferrules, and are restored with and without a fiber post. METHODS AND MATERIALS 50 intact human maxillary central incisors were divided into five groups (n=10): CG (control group) 6-mm fer-rule height, no cervical cavity, and without post; (CO) 6-mm ferrule height without post, with a cervical cavity (access to root canal and cervical cavity restored with composite resin), cervical cavity; and post with ferrule heights of 1 mm (CP1), 2 mm (CP2), and 6 mm (CP6) restored with fiberglass post and composite resin core. After complete metal crowns were cemented on all specimens, they were subjected to thermal cycling (6000 cycles, 5°C/55°C), followed by immediate testing of fracture resistance. After failure, the specimens were sectioned buccolingually to evaluate and identify the mode of failure. The data were analyzed with an analysis of variance (ANOVA) and the Student-Newman-Keuls multiple comparison tests (α =0.05). RESULTS A 1-mm ferrule height (CP1) fracture resistance was significantly lower (531±125 N) compared to the 6-mm ferrule height (CP6) (769±175 N) (p<0.05). With respect to the groups with similar residual dentin, with and without a cervical cavity, CG (667±119 N) and CO (668±119 N), the presence of a post (CP6) increased the resistance to fracture, although no statistically significant difference was demonstrated. Partial decementation was observed in all specimens of CG and CP6, in nine of CP1 and CP2, and in three in CO. Root fractures occurred in 23 specimens. The root surface was exposed 2 mm below the CEJ to simulate bone level. Propagation of subosseous cracks occurred in four specimens in CG and CP2, in seven specimens in CP6, in two specimens in CP1, and in six specimens in CO. All were considered catastrophic failures. CONCLUSIONS Within the limitations of this study it is suggested that, when restoring an endodontically treated maxillary central incisor that has a cervical lesion and needs to be restored with a complete crown, a fiber post is cemented to improve fracture resistance.
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Affiliation(s)
- D Santos Pantaleón
- *Domingo Santos Pantaleón, DDS, MSD, PhD, professor (retired) of prosthodontics, School of Dentistry, Autonomous University of Santo Domingo, Santo Domingo, Dominican Republic
| | - F M Valenzuela
- Fabio M. Valenzuela, DDS, associate professor of prosthodontics, School of Dentistry, Autonomous University of Santo Domingo, Santo Domingo, Dominican Republic
| | - B R Morrow
- Brian R. Morrow, MS, research associate, Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, TN, USA
| | - C H Pameijer
- Cornelis H. Pameijer, DMD, MScD, DSc, PhD, professor emeritus, Department of Reconstructive Sciences, University of Connecticut, Farmington, CT, USA
| | - F García-Godoy
- Franklin García-Godoy, DDS, MS, PhD, PhD, professor and director, Bioscience Research Center, College of Dentistry, University of Tennessee Health Science Center, Memphis, TN, USA, and Honorary Professor, School of Dentistry, Autonomous University of Santo Domingo, Santo Domingo, Dominican Republic
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Mastrogianni A, Lioliou EA, Tortopidis D, Gogos C, Kontonasaki E, Koidis P. Fracture strength of endodontically treated premolars restored with different post systems and metal-ceramic or monolithic zirconia crowns. Dent Mater J 2021; 40:606-614. [PMID: 33456031 DOI: 10.4012/dmj.2020-223] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The purpose of this study was to investigate the fracture strength of endodontically treated human maxillary premolars (ETP) restored with posts and metal ceramic (MC) or monolithic zirconia (MZ) crowns. Sixty ETP were randomly divided into 3 groups. Teeth in control group (C) received a resin filling. ETP in the MC group were restored with prefabricated metal posts, composite cores and MC crowns while in the MZ group with glass-fiber posts, composite cores and MZ crowns. Half of the specimens were loaded at a 135° angle and half under axial loading until fracture. The fracture modes were divided in repairable and irreparable using optical microscopy. Mean fracture strength was significantly higher for MC than for MZ crowns and control group only under axial loading. The distribution of repairable and irreparable failures presented no significant differences. Crown placement significantly improved the fracture strength of ETP irrespectively of post and crown type.
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Affiliation(s)
- Anna Mastrogianni
- Department of Prosthodontics, School of Dentistry, Aristotle University of Thessaloniki
| | - Evdokia-Anna Lioliou
- Department of Prosthodontics, School of Dentistry, Aristotle University of Thessaloniki
| | - Dimitrios Tortopidis
- Department of Prosthodontics, School of Dentistry, Aristotle University of Thessaloniki
| | - Christos Gogos
- Department of Endodontology, School of Dentistry, Aristotle University of Thessaloniki
| | - Eleana Kontonasaki
- Department of Prosthodontics, School of Dentistry, Aristotle University of Thessaloniki
| | - Petros Koidis
- Department of Prosthodontics, School of Dentistry, Aristotle University of Thessaloniki
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Kadkhodaei F, Mehran M, Haghgoo R, Zareiyan M. Fracture Resistance of Three Post Types in the Restoration of Anterior Primary Teeth. Open Dent J 2020. [DOI: 10.2174/1874210602014010375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background:
Extensive restorative treatments of anterior primary teeth are challenging in pediatric dentistry.
Objective:
This study aimed to compare the fracture resistance of three post types for restoring the anterior primary teeth.
Methods:
This in-vitro study was carried out on 90 extracted maxillary anterior primary teeth with intact roots. They were randomly allocated into six groups to be restored with conventional composite resin post, X-tra fill composite resin post, Tetric N Ceram composite resin post, prefabricated glass fiber post with conventional composite build-up, prefabricated glass fiber post with X-tra fill composite build-up, and prefabricated glass fiber post with Tetric N Ceram composite build up. The samples were polished and placed in acrylic resin blocks with 1 mm of part of cervical root being out, thermocycled (×5000) and tested for fracture resistance. Intra-class correlation test, Kruskal-Wallis test and one-way ANOVA were used for statistical analyses (α=0.05).
Results:
The mean fracture resistance was significantly different among the six groups. It was the highest in prefabricated glass fiber post with conventional composite build-up (418.64 N), prefabricated glass fiber post with X-tra fill composite build-up (403.63 N) and prefabricated glass fiber post with Tetric N Ceram composite build up (361.63 N); and the lowest in Tetric N Ceram group (280.65 N). The groups were significantly different concerning the fracture strength and fracture state.
Conclusion:
Since the anterior teeth restored with prefabricated glass fiber posts were far more fracture resistant, and prefabricated glass fiber posts can be promisingly used for the restoration of anterior primary teeth.
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Mayya A, Naik R, Mayya SS, Paul MP. Fracture Resistance of Endodontically Treated Maxillary Premolars with a Longer Single Post and Shorter Double Posts of Different Sizes: An In Vitro Study. J Int Soc Prev Community Dent 2020; 10:183-184. [PMID: 32670907 PMCID: PMC7339994 DOI: 10.4103/jispcd.jispcd_472_19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 01/20/2020] [Indexed: 01/24/2023] Open
Abstract
Aim: The aim of this study was to determine if there is any difference in fracture resistance between different post sizes and lengths when more than one post is involved. Materials and Methods: Thirty extracted maxillary first premolars were endodontically treated and divided into three groups: In Group 1 (control group), no post space preparation was conducted and access cavities were restored with composite; in Group 2 (single post), post space preparation of 10 mm was carried out only in one of the canals; and in Group 3 (double post), post space preparation of 5 mm was conducted in both the canals. Appropriately sized glass fiber posts were cemented in Groups 2 and 3 followed by core buildup. The fracture resistance of the specimen was measured using a universal testing machine and the data analyzed. The mean fracture resistance values of the three groups were compared applying one-way analysis of variance (ANOVA) followed by post hoc Tukey’s test. The data were analyzed using Statistical Package for the Social Sciences software program, version 15.0. South Asia, Bangalore. Results: The control group had a significantly lower fracture resistance value as compared to Groups 2 and 3. No statistically significant difference was observed in the fracture resistance between Groups 2 and 3. Conclusions: No significant difference was observed between the fracture resistance of endodontically treated maxillary first premolars restored with size 3 single post of longer length and size 1 double posts of shorter lengths.
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Affiliation(s)
- Arun Mayya
- Department of Conservative Dentistry and Endodontics, A.J. Institute of Dental Sciences, Mangalore, India
| | - Rajaram Naik
- Department of Conservative Dentistry and Endodontics, A.J. Institute of Dental Sciences, Mangalore, India
| | - Shreemathi S Mayya
- Department of Data Science, Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Maria P Paul
- Department of Conservative Dentistry and Endodontics, A.J. Institute of Dental Sciences, Mangalore, India
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Mosharrafian S, Shafizadeh M, Sharifi Z. Fracture Resistance of a Bulk-Fill and a Conventional Composite and the Combination of Both for Coronal Restoration of Severely Damaged Primary Anterior Teeth. Front Dent 2019; 16:69-77. [PMID: 31608339 PMCID: PMC6778610 DOI: 10.18502/fid.v16i1.1112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Accepted: 08/04/2018] [Indexed: 11/24/2022] Open
Abstract
Objectives: This study aimed to compare the fracture resistance of a bulk-fill and a conventional composite and a combination of both for coronal restoration of severely damaged primary anterior teeth. Materials and Methods: In this in vitro experimental study, 45 primary anterior teeth were randomly divided into three groups. After root canal preparation, the canals were filled with Metapex paste such that after the application of 1 mm of light-cure liner, 3 mm of the coronal third of the canal remained empty for composite post fabrication. Filtek Z250 conventional composite was used in group 1, Sonic-Fill bulk-fill composite was used in group 2 and Sonic-Fill with one layer of Filtek Z250 as the veneering were used in group 3. Adper Single Bond 2 was used in all groups. The teeth were thermocycled, and fracture resistance was measured by a universal testing machine. The mode of fracture was categorized as repairable or irreparable. Data were analyzed using one-way ANOVA. Results: The mean fracture resistance was 307.00±74.72, 323.31±84.28 and 333.30±63.96 N in groups 1 to 3, respectively (P=0.55). The mean fracture strength was 14.53±2.98, 15.08±2.82 and 15.26±3.02 MPa in groups 1 to 3, respectively (P=0.77). The frequency of repairable mode of failure was 80% for the conventional, 73.6% for the bulk-fill and 80% for the bulk-fill plus conventional group, with no significant difference (P>0.05). Conclusion: Bulk-fill composites can be used for coronal reconstruction of severely damaged primary anterior teeth similar to conventional composites to decrease the treatment time in pediatric patients.
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Affiliation(s)
- Shahram Mosharrafian
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Shafizadeh
- Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Zeinab Sharifi
- Department of Pediatric Dentistry, School of Dentistry, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
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Santos Pantaleón D, Valenzuela FM, Morrow BR, Pameijer CH, García-Godoy F. Effect of Ferrule Location with Varying Heights on Fracture Resistance and Failure Mode of Restored Endodontically Treated Maxillary Incisors. J Prosthodont 2019; 28:677-683. [PMID: 31149753 DOI: 10.1111/jopr.13090] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/17/2019] [Indexed: 12/11/2022] Open
Abstract
PURPOSE To investigate the effect of the location of a partial ferrule on 2 walls and the influence of ferrule height variations on remaining walls, fracture resistance, and failure mode of maxillary incisors endodontically treated and restored with fiber posts. MATERIALS AND METHODS Sixty intact human maxillary central incisors were divided into 6 groups (n = 10): no ferrule (NF), 2-mm ferrule (CF2), absence of lingual wall and 1 proximal wall with remaining walls' height, 1 mm (IF1), 2 mm (IF2), 3 mm (IF3), and 4 mm (IF4). They were restored with a fiberglass post and composite resin core. Complete metal crowns were then cemented on all specimens. Completed specimens were subjected to thermal cycling (6000 cycles, 5°C/55°C) followed by the immediate testing of fracture resistance. After failure, the specimens were sectioned buccolingually and evaluated to identify the mode of failure. The data were analyzed with an ANOVA and the Student-Newman-Keuls multiple comparison tests (α = 0.05). RESULTS An incomplete ferrule (IF2) with the lingual wall missing and 1 proximal wall had a fracture resistance of 494 ± 137 N, which was significantly less that of a complete ferrule (CF2) (707 ± 162 N, p = 0.002). An increase of 3 to 4 mm in height of the remaining walls had negligible influence on the fracture resistance: 514 ± 117 N (IF3), 557 ± 177 N (IF4). Partial decementation was observed in all specimens of IF3 and IF4, in 9 of IF1 and IF2, in 6 in NF, and in 3 in CF2. Root fractures occurred in 7 specimens, 4 in CF2, 1 in IF1, 1 in IF2, and 1 in IF4. Cracks under the cemento-enamel junction occurred in 4 specimens (NF and IF1), in 5 (IF2 and IF3), and in 6 (CF2 and IF4) and were considered catastrophic failures. CONCLUSIONS Specimens with a complete ferrule of 2 mm height were more resistant to fracture than specimens with 2 mm height and absence of the lingual wall and 1 proximal wall. A 3 or 4 mm wall height increase was associated with an insignificant increase in fracture resistance and cannot compensate for the absence of the lingual wall and 1 proximal wall.
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Affiliation(s)
| | - Fabio M Valenzuela
- School of Dentistry, Autonomous University of Santo Domingo, Dominican Republic
| | - Brian R Morrow
- Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, TN
| | - Cornelis H Pameijer
- Department of Reconstructive Sciences, University of Connecticut, Farmington, CT
| | - Franklin García-Godoy
- School of Dentistry, Autonomous University of Santo Domingo, Dominican Republic.,College of Dentistry, University of Tennessee Health Science Center, Memphis, TN.,The Forsyth Institute, Cambridge, MA
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Pang J, Feng C, Zhu X, Liu B, Deng T, Gao Y, Li Y, Ke J. Fracture behaviors of maxillary central incisors with flared root canals restored with CAD/CAM integrated glass fiber post-and-core. Dent Mater J 2019; 38:114-119. [PMID: 30381631 DOI: 10.4012/dmj.2017-394] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The objective was to evaluate the fracture resistance properties of maxillary incisors with flared canals restored with computer aided design and computer aided manufacture (CAD/CAM) integrated glass fiber post-and-core. Thirty prepared flared root canals were selected in vitro and restored with CAD/CAM integrated fiber post-and-core (Group A), prefabricated fiber posts (Group B), and cast gold alloy (Group C), respectively. After submitted to fatigue loading, each specimen was subjected to a static loading until fracture. Analysis of variance (ANOVA) tests were used to determine statistical differences. The mean fracture strengths of Groups A and C were significantly higher than those of Group B, whereas no differences were observed between Groups A and C. In addition, reparable fracture modes were mostly observed in Group A while irreparable and catastrophic fractures were mostly found in Groups B and C. These results demonstrate that, in comparison to traditional treatments, CAD/CAM integrated glass fiber post-and-core restoration significantly enhances the fracture resistance of flared root canals.
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Affiliation(s)
- Jianliang Pang
- Department of Stomatology, The General Hospital of the Air Force P.L.A
| | - Changfen Feng
- Comprehensive Department of Stomatology, Suzhou Dental Hospital
| | - Xiaoru Zhu
- Department of Stomatology, The General Hospital of the Air Force P.L.A
| | - Bing Liu
- Department of Stomatology, The General Hospital of the Air Force P.L.A
| | - Tianzheng Deng
- Department of Stomatology, The General Hospital of the Air Force P.L.A
| | - Yuan Gao
- Department of Stomatology, The General Hospital of the Air Force P.L.A
| | - Ying Li
- Department of Stomatology, The General Hospital of the Air Force P.L.A
| | - Jie Ke
- Department of Stomatology, The General Hospital of the Air Force P.L.A
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Influence of remaining coronal tooth structure on fracture resistance and failure mode of restored endodontically treated maxillary incisors. J Prosthet Dent 2018; 119:390-396. [DOI: 10.1016/j.prosdent.2017.05.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 05/10/2017] [Accepted: 05/10/2017] [Indexed: 11/17/2022]
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Kar S, Tripathi A, Trivedi C. Effect of Different Ferrule Length on Fracture Resistance of Endodontically Treated Teeth: An In vitro Study. J Clin Diagn Res 2017; 11:ZC49-ZC52. [PMID: 28571261 DOI: 10.7860/jcdr/2017/24669.9675] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 02/01/2017] [Indexed: 11/24/2022]
Abstract
INTRODUCTION A ferrule has been described as a key element of tooth preparation when using a post and a core. It is a vertical band of tooth structure at the gingival aspect of crown preparation. It lessens the stress transmission to the root which is due to forces from posts or bending during seating of the post. The incorporation of a ferrule can help to withstand the forces of occlusion, preserve the hermetic seal of the luting cement, and minimize the concentration of stresses at the junction of post and core. AIM To evaluate and compare the effect of ferrule length on fracture resistance of endodontically treated mandibular premolar teeth, restored with prefabricated glass fiber post luted with resin cement, composite core and a full coverage metal crown. MATERIALS AND METHODS Forty freshly extracted mandibular premolars were treated endodontically. They were randomly divided into four groups according to their ferrule height: 3 mm, 2 mm, 1 mm and 0 mm (no ferrule). All specimens were restored with prefabricated glass fibre posts (Reforpost, Angelus) and composite resin (Filtek™ Z250XT). Standardized preparation was done on each specimen to receive a cast metal crown. The specimens were thermocycled and compressive static load at a crosshead speed of 1 mm/min was applied at an angle of 30° on lingual incline of buccal cusp of the crown until failure occurred. The load (N) at failure and mode of failure were recorded. Statistical analysis was performed with Kruskal Wallis test. RESULT Fracture resistance values among the groups was found to be statistically significant (p<0.001). The 3 mm ferrule group had significantly higher failure load (971.99±133.07) compared to 2 mm (848.84±109.60), 1 mm (714.64±133.89) and 0 mm ferrule groups (529.36±119.95). More favourable failure modes were observed in almost all groups. CONCLUSION The results of this study showed that fracture resistance of endodontically treated teeth increases as ferrule length increases.
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Affiliation(s)
- Sushil Kar
- Professor, Department of Prosthodontics, Saraswati Dental College, Lucknow, Uttar Pradesh, India
| | - Arvind Tripathi
- Professor and Head, Department of Prosthodontics, Saraswati Dental College, Lucknow, Uttar Pradesh, India
| | - Chavi Trivedi
- Junior Resident, Department of Prosthodontics, Saraswati Dental College, Lucknow, Uttar Pradesh, India
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Ishak MI, Ahmad Shafi A, Abdul Kadir MR, Sulaiman E. Effect of Ferrule Height and Post Length on Mechanical Stress and Displacement of Endodontically Treated Maxillary Central Incisor: A Finite Element Analysis. J Med Biol Eng 2017. [DOI: 10.1007/s40846-017-0227-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Nilavarasan N, Hemalatha R, Vijayakumar R, Hariharan VS. Comparison of compressive strength among three different intracanal post materials in primary anterior teeth: An in vitro study. Eur J Dent 2017; 10:464-468. [PMID: 28042259 PMCID: PMC5166300 DOI: 10.4103/1305-7456.195181] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Objective: The objective of our study was to compare the fracture resistance and the mode of failure among three different post materials in primary anterior teeth. Materials and Methods: A total of sixty extracted primary anterior teeth were selected for the study. The samples were divided into three groups of twenty teeth each: Group I (Ribbond), Group II (Omega loop), and Group III (Glass fiber post). Pulp therapy was followed by intracanal post and crown buildup. The samples were mounted in self-cure acrylic and subjected to compressive strength test using universal testing machine (Instron). The maximum force at which the tooth fractured was recorded. Results: The values were subjected to one-way analysis of variance. The mean compressive strength values of Ribbond, omega loop, and glass fiber post were found to be 83.25 N, 61.60 N, and 75.55 N, respectively. The P value was found to be 0.220. Conclusion: Group I (Ribbond) showed the highest fracture resistance values followed by Group III (Glass fiber post) and Group II (Omega loop). Although there is difference in mean values, they were nonsignificant.
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Affiliation(s)
- Nilavu Nilavarasan
- Department of Pedodontics, SRM Dental College, Chennai, Tamil Nadu, India
| | - R Hemalatha
- Department of Pedodontics, SRM Dental College, Chennai, Tamil Nadu, India
| | - R Vijayakumar
- Department of Pedodontics, SRM Dental College, Chennai, Tamil Nadu, India
| | - V S Hariharan
- Department of Pedodontics, SRM Dental College, Chennai, Tamil Nadu, India
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Junqueira RB, de Carvalho RF, Marinho CC, Valera MC, Carvalho CAT. Influence of glass fibre post length and remaining dentine thickness on the fracture resistance of root filled teeth. Int Endod J 2016; 50:569-577. [DOI: 10.1111/iej.12653] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Accepted: 04/19/2016] [Indexed: 11/30/2022]
Affiliation(s)
- R. B. Junqueira
- Department of Restorative Dentistry; Institute of Science and Technology; University Estadual Paulista (UNESP); São José dos Campos Brazil
| | - R. F. de Carvalho
- Department of Restorative Dentistry; Institute of Science and Technology; University Estadual Paulista (UNESP); São José dos Campos Brazil
| | - C. C. Marinho
- Department of Restorative Dentistry; Institute of Science and Technology; University Estadual Paulista (UNESP); São José dos Campos Brazil
| | - M. C. Valera
- Department of Restorative Dentistry; Institute of Science and Technology; University Estadual Paulista (UNESP); São José dos Campos Brazil
| | - C. A. T. Carvalho
- Department of Restorative Dentistry; Institute of Science and Technology; University Estadual Paulista (UNESP); São José dos Campos Brazil
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Bronzato JD, Cecchin D, Miyagaki DC, de Almeida JFA, Ferraz CCR. Effect of cleaning methods on bond strength of self-etching adhesive to dentin. J Conserv Dent 2016; 19:26-30. [PMID: 26957789 PMCID: PMC4760008 DOI: 10.4103/0972-0707.173189] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Aim: The aim of this study was to investigate the influence of cleaning methods to remove zinc oxide-eugenol-based root canal sealer (Endomethasone) on the bond strength of the self-etching adhesive to dentin. Materials and Methods: Twenty crowns of bovine incisors were cut to expose the pulp chamber. A zinc oxide- and eugenol-based sealer was placed for 10 min in contact with the pulp chamber dentin. Specimens were divided into four groups according to the cleaning method of dentin used: G1, no root canal sealer (control); G2, 0.9% sodium chlorite (NaCl); G3, ethanol; and G4, followed by diamond drill. After cleaning, the teeth were restored with composite resin and Clearfil SE Bond. All specimens were sectioned to produce rectangular sticks and dentin/resin interface was submitted to microtensile bond testing. The mean bond strengths were analyzed using ANOVA/Tukey (α = 0.05). Results: G3 and G4 showed bond strengths similar to the G1 (P > 0.05). A significant decrease in the bond strength in the G2 was observed (P < 0.05). G1, G3, and G4, the predominant failure mode was the mixed type. The prevalence of adhesive failure mode was verified in the G2. Conclusion: The cleaning methods affected the bond strength of the self-etching adhesive to dentin differently.
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Affiliation(s)
- Juliana Delatorre Bronzato
- Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Piracicaba, SP, Brazil
| | - Doglas Cecchin
- Department of Restorative Dentistry, University of Passo Fundo, Passo Fundo, RS, Brazil
| | - Daniela Cristina Miyagaki
- Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Piracicaba, SP, Brazil
| | | | - Caio Cezar Randi Ferraz
- Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Piracicaba, SP, Brazil
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15
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Maroulakos G, Nagy WW, Kontogiorgos ED. Fracture resistance of compromised endodontically treated teeth restored with bonded post and cores: An in vitro study. J Prosthet Dent 2015; 114:390-7. [DOI: 10.1016/j.prosdent.2015.03.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 03/24/2015] [Accepted: 03/24/2015] [Indexed: 11/16/2022]
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16
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Seraj B, Ghadimi S, Estaki Z, Fatemi M. Fracture resistance of three different posts in restoration of severely damaged primary anterior teeth: An in vitro study. Dent Res J (Isfahan) 2015; 12:372-8. [PMID: 26286271 PMCID: PMC4533197 DOI: 10.4103/1735-3327.161461] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Background: Restoration of anterior primary teeth with severe caries lesion is a big challenge. The aim of this study was to compare the fracture resistance of three types of post, including composite resin, customized quartz fiber and prefabricated glass fiber in restoration of severely damaged primary anterior teeth. Materials and Methods: Sixty extracted human primary maxillary incisors were randomly divided into three groups: Group 1: Customized quartz fiber post, Group 2: Composite post and Group 3: Prefabricated glass fiber post. Due to the effect of bonded area on the fracture resistance, the bonded surface of each sample was measured 1 mm above cementoenamel junction. An increasing force was subjected with a crosshead speed of 0.5 mm/min by a universal testing machine until fracture occurred, and the failure mode was assessed afterwards. Data were analyzed using One-way analysis of variance and Kruskal–Wallis tests. The level of significance was considered at P < 0.05. Results: The mean fracture resistance values of three groups were 343.28 N, 278.70 N and 284.76 N, respectively. Although customized quartz fiber post showed the greatest fracture resistance, statistical analysis revealed no significant difference between groups (P = 0.21). The mean fracture strength values of three groups were 12.82 N/mm–2, 11.93 N/mm–2 and 11.31 N/mm–2, respectively; however, the differences were not statistically significant (P = 0.72). Favorable failure mode was more frequent in all groups (P = 0.12). Conclusion: Within the limitations of this study, it can be concluded that all three types of studied posts can be successfully used to restore badly destructed primary anterior teeth.
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Affiliation(s)
- Bahman Seraj
- Dental Research Center, Dentistry Research Institute and Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Sara Ghadimi
- Laser Research Center of Dentistry and Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Zohreh Estaki
- Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Mostafa Fatemi
- Department of Dental Biomaterials and Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran
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17
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Rezaei Dastjerdi M, Amirian Chaijan K, Tavanafar S. Fracture resistance of upper central incisors restored with different posts and cores. Restor Dent Endod 2015; 40:229-35. [PMID: 26295027 PMCID: PMC4534728 DOI: 10.5395/rde.2015.40.3.229] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 05/11/2015] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVES To determine and compare the fracture resistance of endodontically treated maxillary central incisors restored with different posts and cores. MATERIALS AND METHODS Forty-eight upper central incisors were randomly divided into four groups: cast post and core (group 1), fiber-reinforced composite (FRC) post and composite core (group 2), composite post and core (group 3), and controls (group 4). Mesio-distal and bucco-lingual dimensions at 7 and 14 mm from the apex were compared to ensure standardization among the groups. Twelve teeth were prepared for crown restoration (group 4). Teeth in other groups were endodontically treated, decoronated at 14 mm from the apex, and prepared for posts and cores. Resin-based materials were used for cementation in groups 1 and 2. In group 3, composite was used directly to fill the post space and for core build-up. All samples were restored by standard metal crowns using glass ionomer cement, mounted at 135° vertical angle, subjected to thermomechanical aging, and then fractured using a universal testing machine. Kruskal-Wallis and Mann-Whitney U tests were used to analyze the data. RESULTS Fracture resistance of the groups was as follows: Control (group 4) > cast post and core (group 1) > fiber post and composite core (group 2) > composite post and core (group 3). All samples in groups 2 and 3 fractured in restorable patterns, whereas most (58%) in group 1 were non-restorable. CONCLUSIONS Within the limitations of this study, FRC posts showed acceptable fracture resistance with favorable fracture patterns for reconstruction of upper central incisors.
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Affiliation(s)
- Maryam Rezaei Dastjerdi
- Dental Material Research Center, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran. ; Department of Prosthodontics, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
| | - Kamran Amirian Chaijan
- Dental Material Research Center, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran. ; Department of Prosthodontics, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
| | - Saeid Tavanafar
- Department of Prosthodontics, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
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18
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Muangamphan P, Sattapan B, Kukiattrakoon B, Thammasitboon K. The effect of incomplete crown ferrules on fracture resistance and failure modes of endodontically treated maxillary incisors restored with quartz fiber post, composite core, and crowns. J Conserv Dent 2015; 18:187-91. [PMID: 26069401 PMCID: PMC4450521 DOI: 10.4103/0972-0707.157239] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 02/17/2015] [Accepted: 03/29/2015] [Indexed: 11/04/2022] Open
Abstract
Aim: To investigate the fracture resistance of restored endodontically treated teeth (RETT) with fiber posts, cores, and crowns with limited ferrules. Materials and Methods: Sixty maxillary anterior teeth were endodontically treated and decoronated 2 mm above the cemento-enamel junction, and then divided into 6 groups of 10 teeth each; Group circumferential ferrule (2FR), Group ferrule in the labial, mesial, and palatal region (2FR-LaMPa), Group ferrule in the labial, and palatal region (2FR-LaPa), Group 2FR-Pa and 2FR-La respectively, and Group 0FR (no ferrule). All 60 prepared teeth were then restored with quartz fiber posts, resin composite cores, and metal crowns. The specimens were subjected to load until failure occurred. Data were analyzed using one-way analysis of variance and Tukey's tests (α = 0.05). The mode of failure was determined under a stereoscope. Results: A statistical significant difference was found among groups 2FR-LaMPa, 2FR-Pa, 2FR-LaPa, and 2FR from the group 2FR-La, and from the group 0FR (P < 0.01). The predominant mode of failure was an oblique palatal to labial root fracture for the groups with remaining ferrules. Conclusion: For RETT that have incomplete crown ferrules, the location of the ferrules may affect their fracture resistance.
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Affiliation(s)
- Panorjit Muangamphan
- Section of Dental Public Health, Kanchanadit Hospital, Kanchanadit, Suratthani, Thailand
| | - Boonrat Sattapan
- Department of Conservative Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Boonlert Kukiattrakoon
- Department of Conservative Dentistry, Dental Materials Research Unit, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Kewalin Thammasitboon
- Department of Conservative Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
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19
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Lee JH, Sohn DS, Lee CH. Fabricating a fiber-reinforced post and zirconia core with CAD/CAM technology. J Prosthet Dent 2014; 112:683-5. [PMID: 24680166 DOI: 10.1016/j.prosdent.2014.01.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 12/31/2013] [Accepted: 01/02/2014] [Indexed: 11/17/2022]
Abstract
This article describes a technique for overcoming the limitations of dental scanners in imaging post spaces by using a single fiber-reinforced post and computer-aided design and computer-aided manufacturing (CAD/CAM) technology, thereby eliminating the need for a 'Scan Post' and the post and core module in the CAD. This technique produces an anatomically correct core and ensures the correct thickness of crown restorations.
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Affiliation(s)
- Ju-Hyoung Lee
- Assistant Professor, Department of Dentistry, Catholic University of Daegu School of Medicine; Graduate student, Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, South Korea.
| | - Dong-Seok Sohn
- Professor, Department of Dentistry, Catholic University of Daegu School of Medicine, Daegu, South Korea
| | - Cheong-Hee Lee
- Professor, Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, South Korea
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20
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Effect of the crown, post, and remaining coronal dentin on the biomechanical behavior of endodontically treated maxillary central incisors. J Prosthet Dent 2014; 111:234-46. [DOI: 10.1016/j.prosdent.2013.07.006] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Kondoh Y, Takeda T, Ozawa T, Narimatsu K, Konno M, Fujii T, Sekiguchi C, Nakajima K, Ishigami K, Shomura M. Influence of different post-core systems on impact stress: a pilot study. Open Dent J 2013; 7:162-8. [PMID: 24358064 PMCID: PMC3866705 DOI: 10.2174/1874210601307010162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 10/21/2013] [Accepted: 10/23/2013] [Indexed: 11/24/2022] Open
Abstract
This pilot study compared impact strain at the core and root surfaces between two different post-core systems.
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Affiliation(s)
- Yoshihiro Kondoh
- Department of General Dentistry, Tokyo Dental College Chiba Hospital
| | | | | | | | - Michiyo Konno
- Department of Sports Dentistry, Tokyo Dental College
| | - Toshiki Fujii
- Department of Sports Dentistry, Tokyo Dental College
| | | | | | | | - Masahito Shomura
- Department of Pediatric Dentistry, Matsumoto Dental University School of Dentistry ; Division of Oral Health Promotion, Matsumoto Dental University Graduate School
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22
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Abdulrazzak SS, Sulaiman E, Atiya BK, Jamaludin M. Effect of ferrule height and glass fibre post length on fracture resistance and failure mode of endodontically treated teeth. AUST ENDOD J 2013; 40:81-6. [PMID: 24118334 DOI: 10.1111/aej.12042] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The purpose of this study was to evaluate the combined effect of ferrule height and post length on fracture resistance and failure mode of endodontically treated teeth restored with glass fibre posts, composite resin cores and crowns. Ninety human maxillary central incisors were endodontically treated and divided into three groups (n = 30) according to the ferrule heights: 4, 2 and 0 mm, respectively. Post spaces in each group were prepared at 2/3, 1/2 and 1/3 of the root length (n = 10). The specimens were received fibre posts, composite resin core build up and cast metal crowns. After thermocycling, compressive static load was applied at an angle of 135° to the crowns. Two-way analysis of variance showed significant differences in the failure load in the ferrule height groups, no significant differences in post length groups and no significant interaction between ferrule heights and post lengths. More restorable failure modes were observed.
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Affiliation(s)
- Shurooq S Abdulrazzak
- Department of Conservative Dentistry, Faculty of Dentistry, MAHSA University College, Kuala Lumpur, Malaysia
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23
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Santos Filho PCF, Soares PV, Reis BR, Verissimo C, Soares CJ. Effects of threaded post placement on strain and stress distribution of endodontically treated teeth. Braz Oral Res 2013; 27:305-10. [DOI: 10.1590/s1806-83242013000400003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 04/05/2013] [Indexed: 11/22/2022] Open
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24
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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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25
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Jongsma L, Kleverlaan C, Feilzer A. Clinical success and survival of indirect resin composite crowns: Results of a 3-year prospective study. Dent Mater 2012; 28:952-60. [DOI: 10.1016/j.dental.2012.04.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 07/26/2011] [Accepted: 04/16/2012] [Indexed: 11/25/2022]
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26
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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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27
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Sherfudhin H, Hobeich J, Carvalho CA, Aboushelib MN, Sadig W, Salameh Z. Effect of different ferrule designs on the fracture resistance and failure pattern of endodontically treated teeth restored with fiber posts and all-ceramic crowns. J Appl Oral Sci 2011; 19:28-33. [PMID: 21437466 PMCID: PMC4245860 DOI: 10.1590/s1678-77572011000100007] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2009] [Accepted: 10/06/2009] [Indexed: 11/28/2022] Open
Abstract
Objective This study investigated the effect of different ferrule heights on endodontically
treated premolars. Materials and Methods Fifty sound mandibular first premolars were endodontically treated and then
restored with 7-mm fiber post (FRC Postec Plus #1 Ivoclar-Vivadent) luted with
self-polymerized resin cement (Multilink, Ivoclar Vivadent) while the coronal
section was restored with hybrid composite core build-up material (Tetric Ceram,
Ivoclar-Vivadent), which received all-ceramic crown. Different ferrule heights
were investigated: 1-mm circumferential ferrule without post and core (group 1
used as control), a circumferential 1-mm ferrule (group 2), non-uniform ferrule
2-mm buccally and 1-mm lingually (group 3), non-uniform ferrule 3-mm buccally and
2-mm lingually (group 4), and finally no ferrule preparation (group 5). The
fracture load and failure pattern of the tested groups were investigated by
applying axial load to the ceramic crowns (n=10). Data were analyzed statistically
by one-way ANOVA and Tukey’s post-hoc test was used for pair-wise
comparisons (α=0.05). Results There were no significant differences among the failure load of all tested groups
(P<0.780). The control group had the lowest fracture resistance
(891.43±202.22 N) and the highest catastrophic failure rate
(P<0.05). Compared to the control group, the use of fiber post reduced the
percentage of catastrophic failure while increasing the ferrule height did not
influence the fracture resistance of the restored specimens. Conclusions Within the limitations of this study, increasing the ferrule length did not
influence the fracture resistance of endodontically treated teeth restored with
glass ceramic crowns. Insertion of a fiber post could reduce the percentage of
catastrophic failure of these restorations under function.
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Affiliation(s)
- Haneef Sherfudhin
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
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28
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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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29
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da Silva NR, Raposo LHA, Versluis A, Fernandes-Neto AJ, Soares CJ. The effect of post, core, crown type, and ferrule presence on the biomechanical behavior of endodontically treated bovine anterior teeth. J Prosthet Dent 2010; 104:306-17. [DOI: 10.1016/s0022-3913(10)60146-1] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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HSU ML, CHEN CS, CHEN BJ, HUANG HH, CHANG CL. Effects of post materials and length on the stress distribution of endodontically treated maxillary central incisors: a 3D finite element analysis. J Oral Rehabil 2009; 36:821-30. [DOI: 10.1111/j.1365-2842.2009.02000.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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31
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Ma PS, Nicholls JI, Junge T, Phillips KM. Load fatigue of teeth with different ferrule lengths, restored with fiber posts, composite resin cores, and all-ceramic crowns. J Prosthet Dent 2009; 102:229-34. [DOI: 10.1016/s0022-3913(09)60159-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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