Influence of Prefabricated Post Material on Restored Teeth: Fracture Strength and Stress Distribution

Barjau-Escribano, A.; Sancho-Bru, Joaquı́n L.; Forner-Navarro, Leopoldo; Rodríguez-Cervantes, Pablo-Jesús; Pérez-González, Antonio; Sanchez-Marin, Francisco

doi:10.2341/04-169

Cited by 132 publications

(170 citation statements)

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“…Premolar teeth were used to simulate a clinical condition; the incidence of masticatory forces in premolars occurs in a more parallel manner along the long axis of the tooth 19 . This is different from studies conducted with incisors, in which the force is tangential to the tooth 13,20,21 .…”

Section: Discussionmentioning

confidence: 97%

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

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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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Section: Discussionmentioning

confidence: 97%

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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“…Günümüzde genellikle, elastiklik modülünün dentine yakınlığı, korozyona uğramaması, estetik olması gibi özellikleriyle fiber postlar tercih edilmektedir. 4,5 Fiber posttan destek alınarak oluşturulmuş bir restorasyonun başarısı, post ve kök kanal dentini arasındaki sağlam ve sızdırmaz bir bağlantı sayesinde gerçekleşir.…”

Section: Introductionunclassified

Fi̇ber Post Si̇mantasyonunda Kullanilan Self-Adezi̇v Rezi̇n Si̇manlarin Mi̇krosizintilarinin Karşilaştirilmasi

Yildirim¹,

Türkün²,

Boyacıoğlu³

2015

Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi

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and Rely X U200 (3M ESPE, Neuss, Germany). The measurement of microleakage was performed at 2nd, 4th, 6th and 8th minutes. The data was analyzed by ANOVA and Tukey tests (p<0.05). Results: The best results were obtained in Rely X U200 and Panavia SA Cement groups, while the most leakage was seen in G-Cem Automix and Smart Cem 2 groups (p<0,05). There was statistically significant difference between Rely X U200 and Panavia SA Cement groups compared to the control group (p<0,05). The control group was found to have statistically less microleakage than G-Cem Automix and Smart Cem 2 groups (p<0,05). Conclusion:From the point of microleakage, some self adhesive resin cements used for fiber post cementation were found to be more reliable than the control group material.

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“…those of dentin, [15][16][17] a wide variety of threaded posts continue to be used in restoring endodontically treated teeth. A threaded post system has the advantage of providing greater retention than passive posts, because the threads actively engage the dentin wall.…”

Section: Declaration Of Interestsmentioning

confidence: 99%

Effects of threaded post placement on strain and stress distribution of endodontically treated teeth

et al. 2013

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The aim of this study was to evaluate the effect of parallel and tapered threaded post placement on the strain and stress distribution of endodontically treated teeth. Fifteen bovine incisors were sectioned 15 mm from their apices, endodontically treated, and divided into three groups (n = 5) according to three different threaded posts: parallel threaded post (Radix-Anker, RA); tapered threaded post (Euro-Post, EP) and tapered threaded post (Reforpost II, RII). A strain-gauge was fixed on the proximal surface perpendicular to the long root axis, 2 mm from the cervical limit. Strain generated during post placement was recorded and compared using one-way ANOVA and Tukey's test (α = .05). A scanning electron microscope was used to examine the longitudinal root sections. Stress was evaluated for each group in a two-dimensional finite element analysis. The models were meshed with tetrahedron elements and loaded with 2 N at an angle of 135° to the lingual face. The equivalent Von Mises stress was calculated. The one-way ANOVA showed significant difference among the groups. The RA group (150.0 ± 12.2 A) produced higher external strain than the RII (80.0 ± 12.2 B) and the EP (70.0 ± 6.1 B) groups. The inner strain was approximately five times greater than the external dentin strain. High stress concentrations in each thread of the posts were observed. Scanning electron micrographs showed cracks that started in the threads of the posts. The threaded post placement induced root strain mainly on the parallel side post. Root strain and stress concentration on the post threads tended to create cracks in the inner root canal dentin.

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Influence of Prefabricated Post Material on Restored Teeth: Fracture Strength and Stress Distribution

Cited by 132 publications

References 10 publications

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

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

Fi̇ber Post Si̇mantasyonunda Kullanilan Self-Adezi̇v Rezi̇n Si̇manlarin Mi̇krosizintilarinin Karşilaştirilmasi

Effects of threaded post placement on strain and stress distribution of endodontically treated teeth

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