连续波技术对牙周组织温度影响的有限元分析。
Finite element analysis of the effects of periodontal tissue temperature by continuous wave technique.
机构信息
School of Mechanical Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
Faculty of Dentistry, University of Hong Kong, Hong Kong 999077, China.
出版信息
Hua Xi Kou Qiang Yi Xue Za Zhi. 2021 Aug 1;39(4):447-452. doi: 10.7518/hxkq.2021.04.011.
OBJECTIVES
The safety of root canal filling with 200 °C hot gutta-percha was investigated to study the effect of continuous wave technique combined with high-temperature injectable gutta-percha condensation technique on the surface temperature of periodontal tissue.
METHODS
CT technique and Mimics, Geomagic, and Solidworks software were utilized to build the entity models of alveolar bone, dentin and root canal, periodontal ligament, and blood flow, respectively, which were then assembled in Solidworks into a finite element model of tooth with blood flow. By utilizing ABAQUS collaborative simulation platform, fluid-structure coupling was analyzed on the whole process of root canal filling. Consequently, the surface temperature of the periodontal tissue was obtained.
RESULTS
In the absence of blood flow, the temperature of the periodontal ligament surface reached 50.048 ℃ during root canal filling with 200 ℃ gutta-percha. Considering blood flow, the temperature of periodontal ligament surface was 39.570 ℃.
CONCLUSIONS
The temperature of the periodontal ligament surface increased when the continuous wave root canal was filled with 200 ℃ gutta-percha, and the periodontal tissue was not damaged.
目的
研究 200°C 热牙胶根管充填的安全性，探讨连续波技术联合高温注射牙胶加压充填技术对牙周组织表面温度的影响。
方法
采用 CT 技术及 Mimics、Geomagic、Solidworks 软件，分别建立牙槽骨、牙本质和根管、牙周膜和血流的实体模型，再将其在 Solidworks 中组装成具有血流的牙齿有限元模型。利用 ABAQUS 协同仿真平台，对根管充填全过程进行流固耦合分析，得出牙周组织表面温度。
结果
在无血流状态下，200°C 牙胶根管充填时牙周膜表面温度达到 50.048°C。考虑血流时，牙周膜表面温度为 39.570°C。
结论
200°C 牙胶连续波根管充填时，牙周韧带表面温度升高，但牙周组织未受损。
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