A Comparative Study on Fracture Resistance of Difference Prosthesis Design of Mandibular Premolar Teeth after Root Canal Therapy

doi:10.13701/j.cnki.kqyxyj.2019.09.015

Abstract

Abstract: Objective: To compare the fracture strength and fracture mode of crown, onlay, and occlusal veneer made by IPS e.max Press for mandibular premolar teeth after root canal treatment. Methods: The mandibular premolars treated with root canal were randomly divided into 4 groups with 6 detached teeth in each group, resin filling in group A was used as the control group, crown restoration in group B, onlay in group C, and occlusal veneer in group D. Four groups of specimens were statically loaded until the specimen was damaged. The damage value and fracture mode were recorded. SPSS 20.0 software was used for statistical analysis of the experimental. Results: The fracture strength of four groups of samples were (1136.50±338.34), (1947.83±411.60), (2335.00±747.45), and (2249.50±632.38) N. The differences between three experimental groups and the control group were all significant (P<0.05). There was no significant difference between the experimental groups. Conclusion: The fracture strength of experimental groups was significantly higher than that of control group. There was no significant difference in flexural strength between the experimental groups.

Key words: crown, onlay, occlusal veneer, fracture resistance, failure mode

JIA Ying, WANG Pin, WANG Zhenguo, LIU Min. A Comparative Study on Fracture Resistance of Difference Prosthesis Design of Mandibular Premolar Teeth after Root Canal Therapy[J]. Journal of Oral Science Research, 2019, 35(9): 879-882.

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