Effect of the crown, post, and remaining coronal dentin on the biomechanical behavior of endodontically treated maxillary central incisors

Veríssimo, Crisnicaw; Júnior, Paulo Cézar Simamoto; Soares, Carlos José; Noritomi, Pedro Yoshito; Santos-Filho, Paulo César Freitas

doi:10.1016/j.prosdent.2013.07.006

Cited by 86 publications

(74 citation statements)

References 34 publications

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“…After loading, the maximum von Mises stress (VMS) was calculated. This criterion allows an efficient evaluation of failure pattern and damage occurrence under complex stress (2,22).…”

Section: Results Calculationmentioning

confidence: 99%

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Reliability of FEA on the Results of Mechanical Properties of Materials

et al. 2015

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The present study evaluated the reliability of FEA on the results of different mechanical properties (E and v) of materials. Two 3D models of a maxillary canine with endodontic treatment, intracanal post, composite resin core and restored with porcelain-fused-tometal crown were generated according to micro-CT images. Two groups with different E and ν values for porcelain, metal coping alloy, resin cement and composite resin were established. The materials' properties for group GL were based on literature data, while for group GIE the impulse excitation technique was used. A load of 180 N was applied at 45° on the incisal third of the lingual surface of the canine tooth. All models were supported by the periodontal ligament (x=y=z=0). The von Mises stress (VMS) was calculated. The stress values revealed differences between the groups for both VMS distribution and value. The porcelain (GL: 5.966 MPa; GIE: 7.478 MPa), metal coping (GL: 3.811 MPa; GIE: 0.973 MPa) and core (GL: 4.771 MPa; GIE: 0.026 MPa) were significantly affected. In conclusion, this study showed that the determination of mechanical properties (E and ν) of materials is essential for the reliability on the results of FEA.

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“…After loading, the maximum von Mises stress (VMS) was calculated. This criterion allows an efficient evaluation of failure pattern and damage occurrence under complex stress (2,22).…”

Section: Results Calculationmentioning

confidence: 99%

“…Finite element analysis (FEA) has been suggested as an efficient method to simulate a real clinical scenario and solve complex problems by evaluations of inner structural performance (1,2). Thus, it has also been considered as an important method to foresee long-term failures (3).…”

Section: Introductionmentioning

confidence: 99%

Reliability of FEA on the Results of Mechanical Properties of Materials

et al. 2015

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“…Cast post and cores and, more recently, prefabricated metallic posts have been used. According to finite element analyses, such posts with an elastic modulus superior to that of dentin concentrate high stress on the radicular dentin, which may increase the risk of root fracture 6 . Carbon and glass fiber posts were developed as an alternative to metallic posts to improve esthetics and adhesion to the dental structure.…”

Section: Introductionmentioning

confidence: 99%

“…Carbon and glass fiber posts were developed as an alternative to metallic posts to improve esthetics and adhesion to the dental structure. Due to mechanical properties similar to dentin, fiber posts transmit less stress to the remaining dentin and decrease the risk of root fracture since it is likely that the post/core will fail before the root fractures 6 .…”

Section: Introductionmentioning

confidence: 99%

“…Although the rigidity of the intracanal anchorage should be taken into consideration since it may influence the mechanical behavior of the restored endodontically treated teeth 6 , most studies which evaluated the fracture strength of teeth restored with different post materials used diverse post systems with varied shapes and diameters 1,7,8 , making it difficult to isolate the variable "post rigidity". For this reason, this study focused on the evaluation of posts with the same format.…”

Section: Introductionmentioning

confidence: 99%

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Influence of elastic modulus of intraradicular posts on the fracture load of roots restored with full crowns

Marchionatti

Valli

Wandscher

et al. 2017

Rev. odontol. UNESP

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Objective This study aimed to evaluate the fracture load and displacement of roots restored with posts of different elastic modulus. Material and method Thirty-six replicas of epoxy resin mixed with glass microfibers were made from an endodontically-treated human premolar root prepared to a length of 12 mm with a custom drill, leaving the apical 4 mm unprepared. Replicas were randomly restored with (n = 12): FP-LM (fiber post with low elastic modulus– 50 GPa), FP-HM (fiber post with high elastic modulus – 67 GPa) and MP (metallic post – 208 GPa), using self-curing adhesive and dual resin cement. Cores were built up with composite resin and metallic crowns were cemented in all the roots with self-adhesive resin cement with self-curing mode. Specimens were subjected to a fracture load test (45° inclination/0.5 mm/min) and displacement was registered at 100 N. Result One-way ANOVA showed that elastic modulus of the post did not affect the fracture load means (p = 0.203) (FP-LM: 237.4 ± 65.11 N; FP-HM: 236.7 ± 92.85 N; MP: 295.8 ± 108.7 N) but was statistically significant for the displacement (p < 0.00): Tukey’s test showed that FP-LM displacement mean (0.81 ± 0.15 mm) was significantly higher than those for FP-HM (0.46 ± 0.26 mm; p = 0.00) and MP (0.62 ± 0.07 mm; p = 0.04). Conclusion Posts with different elastic modulus exhibit similar fracture loads, but a lower displacement is achieved when fiber posts with a high elastic modulus and metallic posts are used.

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