Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin, 150080, Heilongjiang, PR China.
Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin, 150080, Heilongjiang, PR China.
J Mech Behav Biomed Mater. 2023 Sep;145:106045. doi: 10.1016/j.jmbbm.2023.106045. Epub 2023 Jul 24.
This work analyzed and compared the mechanical properties of identical cracked tooth models treated with different materials and crown parameters. Thus, to provide dentists with a more structured way to select materials and geometric parameters and determine the strongest restoration model for cracked teeth.
This work used finite element analysis (FEA). We applied 25 restorative models, including five restorative materials, and three preparation parameters. Seven mechanical properties of the cracked tooth preparation were analyzed using correlation analysis.
The highest lifetime of the cracked preparation was obtained for crowns with a 5° of polymerization, width = 0.8 mm, and a length offset of 0.2 mm. The highest lifetime was obtained with ZC crown material, but the least deformation of the cracked tip was obtained with LU material.
The results showed that the larger MOE material for the crown and a reasonable increase in the thickness and length of the crown is a favorable method to prevent further cracks to extend. This FEA study, thereby forming a novel basis for clinical guidance as to preparation of dental crowns applicable to cracked teeth.
本研究分析并比较了不同材料和牙冠参数处理相同牙裂模型的力学性能，旨在为临床医生选择材料和几何参数提供更结构化的方法，并确定牙裂修复的最强模型。
本研究采用有限元分析（FEA）。我们应用了 25 种修复模型，包括 5 种修复材料和 3 种预备参数。通过相关性分析，对牙裂预备体的 7 项机械性能进行了分析。
聚合角度为 5°、宽度=0.8mm、长度偏置为 0.2mm 的牙冠具有最长的牙裂预备体寿命。ZC 牙冠材料获得的寿命最长，但 LU 材料的牙裂尖端变形最小。
结果表明，牙冠采用较大的 MOE 材料并合理增加牙冠的厚度和长度是防止进一步裂纹扩展的有利方法。本 FEA 研究为临床指导牙裂牙冠预备提供了新的依据。
