上颌前磨牙隧道洞型应力分析

doi:10.13701/j.cnki.kqyxyj.2016.03.013

口腔医学研究 ›› 2016, Vol. 32 ›› Issue (3): 266-267.DOI: 10.13701/j.cnki.kqyxyj.2016.03.013

上颌前磨牙隧道洞型应力分析

王霞霞¹, 马彦昭^2*, 陈宏², 马晓², 陈智¹

1. 武汉大学口腔医学院牙体牙髓科湖北武汉 430072;
2. 武汉大学动力机械学院湖北武汉 430072

收稿日期:2015-12-29 出版日期:2016-03-28 发布日期:2016-03-29
通讯作者: 陈智，E-mail：zhichen@whu.edu.cn
作者简介:王霞霞(1989~ ),女,甘肃人,博士,主要从事龋病的微创治疗等相关临床研究工作。
基金资助:
国家自然科学基金资助项目(编号:51305306)
湖北省科技支撑计划项目(编号:2013BCB025)
中央高校基本科研业务费专项资金项目(编号:2042014kf0274)

Stress Analysis of Tunnel Preparation of Maxillary Premolars.

WANG Xia-xia¹, MA Yan-zhao^2*, CHEN Hong², MA Xiao², CHEN Zhi^1*

1. School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China;
2. School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China

Received:2015-12-29 Online:2016-03-28 Published:2016-03-29

摘要/Abstract

摘要： 目的: 分析边缘嵴高度和修复材料对上颌前磨牙隧道洞型的应力影响。方法: 建立边缘嵴高度分别为1.5 mm、2.5 mm、3.5 mm的上颌前磨牙隧道洞型的三维有限元模型。修复材料设定为复合树脂(CR)和树脂加强型玻璃离子(GIC)。在正常咬合接触区加载垂直于牙面的100 N的力,计算牙釉质、牙本质和修复材料的应力分布,评估其失效风险。结果: 对于不同边缘嵴高度,摩尔库伦失效值在边缘嵴高度为2.5 mm时最低;对于不同修复材料,复合树脂修复的隧道洞型摩尔库伦失效值较低。结论: 边缘嵴高度为2.5 mm,复合树脂修复的隧道洞型具有更好的力学性能。

关键词: 隧道洞型, 三维有限元, 摩尔库伦失效准则

Abstract: Objective: To analyze the stress distribution and failure risk of tunnel-prepared maxillary premolars with different marginal ridge heights and restorative materials. Methods: The 3D models of tunnel-prepared maxillary premolars with marginal ridge height 1.5mm, 2.5mm and 3.5mm were created. The restorative materials were resin-based composite (CR) and resin-reinforced glass-ionomer cement (GIC). A vertical load of 100N was applied at the contact areas of normal occlusion. Stress distribution of enamel, dentin and restorations were calculated and failure risks were evaluated separately. Results: Among different marginal ridge height, the value of Mohr-Coulomb failure criterion (MCFC) was the lowest in 2.5mm height. Among different restorative materials, the value of MCFC was lower in tunnel preparation restored with resin composite than that with glass-ionomer cement. Conclusion: Tunnel preparation with 2.5mm of marginal ridge and restored with resin composite exhibited better mechanical properties.

Key words: Tunnel preparation , Three-dimensional finite element analysis , Mohr-Coulomb failure criterion

中图分类号:

R780.1

王霞霞, 马彦昭, 陈宏, 马晓, 陈智. 上颌前磨牙隧道洞型应力分析[J]. 口腔医学研究, 2016, 32(3): 266-267.

WANG Xia-xia, MA Yan-zhao, CHEN Hong, MA Xiao, CHEN Zhi. Stress Analysis of Tunnel Preparation of Maxillary Premolars.[J]. Journal of Oral Science Research, 2016, 32(3): 266-267.

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上颌前磨牙隧道洞型应力分析

Stress Analysis of Tunnel Preparation of Maxillary Premolars.

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