包含种植体下颌骨颏部受力的有限元分析  

Finite element analysis of the mandible with implant applied the force from chin

作　　者：张政[1] 刘阳 毕振宇[3] 

机构地区：[1]江汉油田总医院口腔科,湖北潜江433124 [2]深圳市龙华新区人民医院口腔科,深圳518109 [3]南方医科大学人体解剖教研室,广东省医学生物力学重点实验室,广州510515

出　　处：《中国临床解剖学杂志》2015年第4期464-467,共4页Chinese Journal of Clinical Anatomy

摘　　要：目的通过对右侧下颌第1磨牙为种植牙的下颌骨,颏部给予100 N水平力作用的有限元分析,揭示种植体对下颌骨应力传导的影响。方法利用CT图像,建立缺失第1磨牙的下颌骨和种植牙的三维有限元模型,保持下颌骨的边界约束,给予颏部100 N的水平外力作用,分析下颌第1磨牙种植牙区域应力变化和整体下颌骨的应力变化。结果颏部受到水平外力100 N作用后,右侧第1磨牙种植区域断面应力变化:10.37 mm与86.38 mm位置出现应力最低,其最大应力峰值分别为9.005 Pa、9.067 Pa;52.97 mm位置处出现应力最大,应力的峰值94.962 Pa。左侧第1磨牙断面应力变化:10.82 mm与83.82mm位置出现应力最低,其最大应力峰值分别为18.227 Pa、8.867 Pa;54.66 mm位置处出现应力最大,应力的峰值93.912 Pa。下颌骨的整体应力变化:颏部受力部位最大,最大的应力峰值为260.524 Pa。结论一定条件下第1磨牙位置的种植体植入不影响下颌骨的正常下颌骨的应力传导。Objectives To investigate the force effect of implant in the mandible, the stress changes of the mandible and the first molar for mandibular dental implants were analyzed with finite element method when the chin was impacted with 100N horizontal force. Methods The finite element models of mandible missing the first molar and the dental implants were established with CT data of a man head. The mandibular boundary constraints were built, and the chin was impacted with 100N horizontal force. The stress change of the whole mandible and the regional of mandibular first molar dental implants were recorded and observed. Results After the 100N external force being imposed on the mentum, stress changes showed that the lowest values on the section area of the right implant were 9.005 Pa in 10.82 mm and 9.067 Pa in 86.38mm, and the maximum stress was 94.962 Pa in 52.97 mm. For the left first molar, the changes showed that the lowest values were 18.227 Pa in 10.37 mm and 8.867 Pa in 83.82 mm, and the maximum stress was 93.912 Pa in 54.66 mm. The stress change of the overall mandibule recorded showed that the mentum stress area was the largest, with peak reaching 260.524 Pa. Conclusion The implant of first molar does not affect the normal mechanical behavior of mandible.

关 键 词：下颌骨 颏部 种植体 有限元 

分 类 号：R318.01[医药卫生—生物医学工程]