乳牙不锈钢预成冠对儿童颞下颌关节应力分布及应力影响的三维有限元分析

doi:10.19439/j.sjos.2025.03.003

上海口腔医学 ›› 2025, Vol. 34 ›› Issue (3): 237-243.doi: 10.19439/j.sjos.2025.03.003

乳牙不锈钢预成冠对儿童颞下颌关节应力分布及应力影响的三维有限元分析

张宇璐¹, 刘佳^1,2

1.新疆医科大学第一附属医院（附属口腔医院）儿童口腔科-口腔预防科,新疆乌鲁木齐 830054;
2.新疆维吾尔自治区口腔医学研究所,新疆乌鲁木齐 830054

收稿日期:2023-10-24 修回日期:2024-01-06 出版日期:2025-06-25 发布日期:2025-06-24
通讯作者: 刘佳,E-mail：liujia_0806@163.com
作者简介:张宇璐（1997-）,女,硕士,住院医师,E-mail：1398903937@qq.com
基金资助:
中国牙病防治基金会“爱笑少年”项目（A2021-056）

Three-dimensional finite element analysis of stress distribution and influence of stainless steel preformed crown on temporomandibular joint in children

Zhang Yulu¹, Liu Jia^1,2

1. Department of Pediatric Dentistry and Preventive Dentistry, School/Hospital of Stomatology, First Affiliated Hospital of Xinjiang Medical University. Urumqi 830054;
2. Xinjiang Uygur Autonomous Region Institute of Stomatology. Urumqi 830054, Xinjiang Uygur Autonomous Region, China

Received:2023-10-24 Revised:2024-01-06 Online:2025-06-25 Published:2025-06-24

摘要/Abstract

摘要： 目的: 通过三维有限元法分析乳牙不锈钢预成冠修复上、下颌第一、第二乳磨牙对颞下颌关节的应力影响及应力分布规律,为临床诊疗提供依据。方法: 收集3、6、8岁男、女儿童各1名的CBCT数据,分别获取其上、下颌第一及第二乳磨牙和上、下颌骨,牙列及颞下颌关节数据,运用三维有限元法分别建立上、下颌第一及第二乳磨牙和上、下颌骨、牙列及颞下颌关节的有限元模型,通过施加载荷力,分析抬高不同高度的不锈钢预成冠对颞下颌关节的应力影响及应力分布规律。结果: 不锈钢冠修复后颞下颌关节施加不同载荷,3、6、8岁患儿在不同性别、年龄及载荷角度下髁突的应力差异有统计学意义（P<0.01）,而不同组别的应力差异无统计学意义（P>0.05）。结论: 不锈钢预成冠修复乳磨牙后,施加3种角度载荷,正常咬合高度时颞下颌关节应力分布更均匀,即在临床修复治疗中,应用不锈钢冠恢复正常咬合高度有利于降低颞下颌关节的应力集中,并提升乳磨牙修复疗效及预后。

关键词: 有限元法, 乳牙, 不锈钢预成冠, 颞下颌关节, 应力分析

Abstract: PURPOSE: To study the stress effect and distribution pattern of the first and second primary molars on temporomandibular joint in the restoration of upper and lower teeth with stainless steel precrown using three-dimensional finite element method, in order to provide theoretical basis for clinical diagnosis and treatment. METHODS: CBCT data from one male and one female aged 3, 6, and 8 years old were collected, and the first and second maxillary molar teeth, upper and lower mandible, dentition and temporomandibular joint(TMJ) data were obtained respectively. Three-dimensional finite element method was used to create the finite element models of the first and second maxillary molar teeth, upper and lower mandible, dentition and TMJ, respectively. The stress distribution of the TMJ with the stainless steel prefabricated crown raised at different heights was analyzed by applying the load force. RESULT: After stainless steel crown repair, different loads were applied to the TMJ, and the maximum stress values generated by the condyle were analyzed and compared. The stress difference analysis results of the condyle in children aged 3, 6, and 8 under different genders, ages, and load angles were statistically significant(P<0.01), while the stress difference analysis results of different groups were not statistically significant(P>0.05). CONCLUSIONS: After restoring primary molars with stainless steel preformed crowns, applying three angle loads results in a more uniform distribution of stress in the TMJ at normal occlusal height. Therefore, using stainless steel crowns to restore normal occlusal height in clinical restorative treatment is beneficial for reducing stress concentration in TMJ and improving the efficacy and long-term prognosis of primary molars restoration.

Key words: Finite element method, Deciduous teeth, Stainless steel preformed crown, Temporomandibular joint, Stress analysis

中图分类号:

R783

张宇璐, 刘佳. 乳牙不锈钢预成冠对儿童颞下颌关节应力分布及应力影响的三维有限元分析[J]. 上海口腔医学, 2025, 34(3): 237-243.

Zhang Yulu, Liu Jia. Three-dimensional finite element analysis of stress distribution and influence of stainless steel preformed crown on temporomandibular joint in children[J]. Shanghai Journal of Stomatology, 2025, 34(3): 237-243.

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乳牙不锈钢预成冠对儿童颞下颌关节应力分布及应力影响的三维有限元分析

Three-dimensional finite element analysis of stress distribution and influence of stainless steel preformed crown on temporomandibular joint in children

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