Stress distributions in maxillary central incisors restored with various types of post materials and designs.
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.
Department of Conservative Dentistry, Faculty of Dentistry, University of Thamar, Dhamar, Yemen.
A A
AA
Madfa
Medical Implant Technology Group, Faculty of Biosciences & Medical Engineering, Universiti Teknologi Malaysia, Malaysia.
M R Abdul
MR
Kadir
Medical Implant Technology Group, Faculty of Biosciences & Medical Engineering, Universiti Teknologi Malaysia, Malaysia.
J
J
Kashani
Medical Implant Technology Group, Faculty of Biosciences & Medical Engineering, Universiti Teknologi Malaysia, Malaysia.
S
S
Saidin
Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia; Biomaterials Technology Research Group, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
E
E
Sulaiman
Dental Research & Training Unit, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
J
J
Marhazlinda
Faculty of Applied Science and Engineering, University of Toronto, Canada.
R
R
Rahbari
Department of Biomedical Imaging, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
B J J
BJ
Abdullah
Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
H
H
Abdullah
Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia; Biomaterials Technology Research Group, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia. Electronic address: nhayaty@um.edu.my.
N H
NH
Abu Kasim
D003198:Computer Simulation; D017076:Computer-Aided Design; D003764:Dental Materials / Q000737:chemistry*; D017267:Dental Prosthesis Design; D003799:Dental Stress Analysis / Q000379:methods*; D019544:Equipment Failure Analysis; D006801:Humans; D007180:Incisor / Q000502:physiology* / Q000601:surgery; D008437:Maxilla / Q000502:physiology* / Q000601:surgery; D008954:Models, Biological; D011176:Post and Core Technique / Q000295:instrumentation*; D011312:Pressure; D013314:Stress, Mechanical
D003764:Dental Materials
Endodontic post design; Endodontic post materials; Finite element analysis; Stress analysis