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Stress distributions in maxillary central incisors restored with various types of post materials and designs

Madfa, Ahmed Ali A. and Abdul Kadir, Mohammed Rafiq and Kashani, Jamal and Saidin, Syafiqah and Sulaiman, Eshamsul and Marhazlinda, Jamaludin and Rahbari, Reza G. and Abdullah, Basri Johan Jeet and Abdullah, Hadijah and Abu Kasim, Noor Hayaty (2014) Stress distributions in maxillary central incisors restored with various types of post materials and designs. Medical Engineering and Physics, 36 (7). pp. 962-967. ISSN 1873-4030

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Official URL: http://dx.doi.org/10.1016/j.medengphy.2014.03.018


Different dental post designs and materials affect the stability of restoration of a tooth. This study aimed to analyse and compare the stability of two shapes of dental posts (parallel-sided and tapered) made of five different materials (titanium, zirconia, carbon fibre and glass fibre) by investigating their stress transfer through the finite element (FE) method. Ten three-dimensional (3D) FE models of a maxillary central incisor restored with two different designs and five different materials were constructed. An oblique loading of 100 N was applied to each 3D model. Analyses along the centre of the post, the crown-cement/core and the post-cement/dentine interfaces were computed, and the means were calculated. One-way ANOVAs followed by post hoc tests were used to evaluate the effectiveness of the post materials and designs (p = 0.05). For post designs, the tapered posts introduced significantly higher stress compared with the parallel-sided post (p < 0.05), especially along the centre of the post. Of the materials, the highest level of stress was found for stainless steel, followed by zirconia, titanium, glass fibre and carbon fibre posts (p < 0.05). The carbon and glass fibre posts reduced the stress distribution at the middle and apical part of the posts compared with the stainless steel, zirconia and titanium posts. The opposite results were observed at the crown-cement/core interface.

Item Type:Article
Uncontrolled Keywords:endodontic post design, stress analysis
Subjects:Q Science > QH Natural history
Divisions:Biosciences and Medical Engineering
ID Code:62678
Deposited By: Fazli Masari
Deposited On:01 Jun 2017 14:07
Last Modified:01 Jun 2017 14:07

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