Fracture strength of flared bovine roots restored with different intraradicular posts

Clavijo, Victor Grover René; Reis, José Maurício dos Santos Nunes; Kabbach, William; Faria-e-Silva, André Luís; Oliveira, Osmir Batista de; Andrade, Marcelo Ferrarezi de

doi:10.1590/s1678-77572009000600007

Cited by 76 publications

(113 citation statements)

References 19 publications

(38 reference statements)

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“…Studies demonstrated that relining promotes better adaptation to the root canal walls, promoting better contact between the post/cement/dentin assembly and consequently greater bond strength. [18][19][20] The close contact with the root canal walls reduces the thickness of the resin cement layer, with less formation of bubbles and reducing the stresses at the adhesive interface during polymerization shrinkage. 19 Additionally, the retention of relined posts to the root canal may depend on the friction resistance to displacement, more than on the adhesion by micromechanical and chemical retention promoted by the resin adhesive agents.…”

Section: Discussionmentioning

confidence: 99%

Influence of Relining Post on the Bond Strength of Resin Cements

et al. 2015

The Journal of Contemporary Dental Practice

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This study evaluated the influence of relining fiber posts on the bond strength (BS) of resin cements in the root canal. Forty bovine teeth were divided in four groups (n = 10): G1 (ARC)-fiber post cemented with resin cement RelyX ARC; G2 (ARC+Z350)-relined fiber post cemented with RelyX ARC; G3 (U200)-fiber post cemented with self-adhesive cement RelyX U200; G4 (U200+Z350)-relined fiber post cemented with RelyX U200. The roots were sectioned in six 1.2-mm slices and the push-out test was performed. Data were analyzed by three-way analysis of variance (ANOVA), and Tukey's test (α = 0.05). For the conventional resin cement, there was no significant difference between groups G1-ARC (15.5 ± 3.8) and G2-ARC+Z350 (16.1 ± 4.5). For the self-adhesive cement, the results revealed higher BS values for relined posts G4-U200 + Z350 (19.9 ± 7.9) as compared to non-relined posts G3-U200 (14.4 ± 4.5). For both cements, in groups of relined posts, the apical and the cervical thirds presented similar BS. Relining enhances the performance of the self-adhesive resin cement, and the interaction between relining and root third influences the BS to the conventional resin cement.

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Section: Discussionmentioning

confidence: 99%

Influence of Relining Post on the Bond Strength of Resin Cements

et al. 2015

The Journal of Contemporary Dental Practice

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“…Clavijo et al 33 suggested that anatomic posts seem to be a good alternative for restoring flared root canals. In this technique, the fiber post is reshaped to fit the root canal using composite resin.…”

Section: Discussionmentioning

confidence: 99%

Restorative perspective for endodontically treated teeth: Anatomic post

Ferreira¹,

Camapum²,

Ferreira³

et al. 2014

Dental Press Endod

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“…However, other studies [4][5][6] have demonstrated that the fracture strength of teeth is directly related to the amount of remaining healthy dental tissue. Yet other studies have suggested that the preparation and insertion of intraradicular systems may weaken the tooth 1,7 .…”

Section: Introductionmentioning

confidence: 98%

Fracture resistance of weakened human premolar roots after use of a glass fiber post together with accessory posts

Segato

Amaral

França

et al. 2014

Rev. odontol. UNESP

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ResumoObjetivo: Avaliar a resistência à fratura de pré-molares com canais alargados restaurados com pinos de fibra de vidro e cimento resinoso com diferentes quantidades de pinos acessórios. Material e método: Trinta e seis pré-molares receberam preparos padronizados que simularam raízes fragilizadas e foram separados em três grupos (n=12): G0 -pino de fibra de vidro (Reforpost/Angelus) cimentado com cimento resinoso dual (Rely X ARC/3M ESPE); G1 -pino de fibra de vidro e um pino acessório (Reforpin/Angelus) cimentados com cimento resinoso dual; G2 -pino de fibra de vidro e dois pinos acessórios cimentados com cimento resinoso dual. Núcleos de preenchimento em resina composta foram confeccionados para cada dente. Um coping metálico foi posicionado de forma padronizada sobre o núcleo de preenchimento para a realização dos ensaios de resistência à fratura em máquina de ensaios. Os testes foram realizados com aplicação de força paralela ao longo eixo do dente com velocidade de 0,5 mm/min. O modo de fratura foi avaliado com lupa estereoscópica em escores. Resultado: Análise de Variância (ANOVA) foi aplicada e mostrou não haver diferenças significativas nos valores de resistência à fratura entre os grupos (em kgf): G0 = 91,1 ± 56,9; G1 = 104,7 ± 66,6; G2 = 106,1 ± 51,9. Maior frequência de fraturas ou trincas foram observadas no terço cervical das raízes na ausência de pinos acessórios, mas não houve diferenças significativas entre os modos de fraturas entre os grupos. Conclusão: A quantidade de pinos acessórios cimentados em raízes fragilizadas não influenciou a resistência à fratura ou modo de falha das raízes de pré-molares.Descritores: Técnica para retentor intrarradicular; cimentos de resina; raiz dentária. AbstractObjective: To evaluate the fracture strength of human premolar teeth with wide root canals, restored with glass fiber posts and resin cement, together with different numbers of accessory posts. Material and method: Thirty-six premolars received standardized preparations that simulated weakened roots, and were divided into three groups (n=12): G0 -glass fiber post (Reforpost/Angelus) cementation with dual cure resin cement (Rely X ARC/3M ESPE); G1 -glass fiber post cementation and one accessory post (Reforpin/Angelus), with dual cure resin cement; G2 -glass fiber post cementation and two accessory posts, with dual cure resin cement. Resin composite cores were placed in each tooth. A metal coping was placed in a standardized position on the cores to perform the compressive tests using a test machine. Testing was performed applying a force parallel to the long axis of the teeth at a speed of 0.5 mm/min. Fracture mode was analyzed under a stereoscopic loupe, classified by scores. Result: the Analysis of Variance (ANOVA) was applied, and there was no statistical difference in the mean values of fracture strength among the groups (in kgf): G0 = 91.1 ± 56.9; G1 = 104.7 ± 66.6; G2 = 106.1 ± 51.9. Greater frequency of fracture or cracks was observed in the cervical one-third of the root in the teeth without ce...

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Fracture strength of flared bovine roots restored with different intraradicular posts

Cited by 76 publications

References 19 publications

Influence of Relining Post on the Bond Strength of Resin Cements

Influence of Relining Post on the Bond Strength of Resin Cements

Restorative perspective for endodontically treated teeth: Anatomic post

Fracture resistance of weakened human premolar roots after use of a glass fiber post together with accessory posts

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