Affiliation:
1. Department of Computer and Information Engineering, Tianjin Agriculture University, Tianjin 300384, P. R. China
2. College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, P. R. China
3. Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, Tianjin University, Tianjin 300354, P. R. China
Abstract
A post-and-core crown is widely used in prosthetic dentistry; however, in clinical treatment, it easily causes root fracture and tooth penetration. To address these problems, this study aimed to present a customized post-and-core design for the posterior tooth implant. First, a residual tooth and its root canal were reconstructed. Then, the root canal surface was extracted, the surface curvature and length parameters were defined, and the customized post-and-core design was developed. Finally, the tooth, root canal, and post-and-core with different implant lengths in five masticatory directions were analyzed using finite element analysis to evaluate the stress distribution. The results showed that, with the similar shape of the post-and-core structure and the root canal, the tooth stress trend was uniform. When the length of the post-and-core structure [Formula: see text] was 0[Formula: see text]mm, that is, it was two thirds of the root canal length, the root canal stress was minimum. Therefore, the customized design of the post-and-core structure could well adapt to any kind of root canal, and the length of the post-and-core structure [Formula: see text] provided guidance for the post-and-core crown prosthesis in clinic.
Funder
National Natural Science Foundation of China
Science and Technology Program of Tianjin
Publisher
World Scientific Pub Co Pte Lt