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: 为研究连续波技术联合高温热牙胶注射充填技术对牙周组织的表面温度影响，探究采用200 ℃热牙胶根管充填的安全性。方法: 采用CT技术、Mimics、Geomagic、Solidworks软件分别建立牙槽骨、牙本质、根管、牙周膜、血流的实体模型，利用Solidworks装配形成包含血流的牙齿有限元模型。基于ABAQUS协同仿真平台对整个根管充填过程进行流固耦合分析，得到牙周组织表面的温度。结果: 在无血流的情况下，在以200 ℃进行根管充填时牙周膜外表面的温度达到50.048 ℃；当考虑血流时，牙周膜外表面温度为39.570 ℃。结论: 以200 ℃连续波根管充填时牙周膜外表面温度升高，且不会对牙周组织造成损伤。.
Keywords: ABAQUS simulation; continuous wave; filling injection; finite element model; fluid-structure interaction; periodontium.