不同植入扭矩对种植体骨界面生物力学特性的影响  

Influence of insertion torque on biomechanical characteristics at implant-bone interface

作　　者：丁熙[1] 朱形好[1] 林芝[1] 廖胜辉[2] 黄建静[1] 张秀华[1] 

机构地区：[1]温州医学院附属第一医院口腔医疗中心,浙江温州325002 [2]中南大学信息科学与工程学院,长沙410083

出　　处：《医用生物力学》2013年第2期184-188,共5页Journal of Medical Biomechanics

基　　金：国家自然科学基金资助项目(81000461);浙江省自然科学基金资助项目(Y2100274);温州市科技局对外合作项目(H20100027)

摘　　要：目的探讨不同植入扭矩对种植体骨界面生物力学特性的影响。方法采用薄层CT扫描和自主开发的USIS软件建立包含种植体的即刻负载下颌骨三维有限元模型。采用ANSYS软件分析种植体在0、15、25 N.cm 3种植入扭矩下,垂直和颊舌向45°加载150 N力时种植体骨界面von Mises应力、应变值。结果垂直载荷时,3种植入扭矩下的种植体骨界面von Mises应力最大值分别为33.6、56.4和69.6 MPa,应变最大值分别为5 157、8 645、15 630με。颊舌向载荷时,3种植入扭矩下的种植体骨界面von Mises应力最大值分别为95.3、100.6和108.3 MPa,应变最大值分别为17 110、18 690、21 380με。结论种植体植入扭矩的增大会增加种植体骨界面的应力应变值,颊舌向载荷时比垂直载荷时增加明显缓慢。Objective To evaluate the influence of different insertion torque values on stress and strain distribu- tions at implant-bone interface. Methods The three-dimensional finite element model of the whole mandible with dental implants for immediate loading was created by CT scanning and self-developed USIS （ universal surgical integration system） software. The insertion torque values of dental implants were supposed to be 0, 1,5 and 2,5 N cm, respectively. The values of Von Mises stress and strain at implant-bone interface were calculated with ANSYS software, when the dental implants were loaded with vertical and buccolingual force at a 45°oblique angle of 150 N. Results When the dental implants were loaded with the vertical force, the maximum Von Mises stress was 33.6, 56.4, 69.6 MPa and the maximum strain was 5 157, 8 645, 1,5 630 με, respectively, under the three in- sertion torques. When the dental implants were loaded with the buccolingual force, the maximum Von Mises stress was 95.3, 100.6, 108.3 MPa and the maximum strain was 17 ll0, 18 690, 21 380 με, respectively, under the three insertion torques. Conclusions With the increased torque value of dental implants, the stress and strain at the implant-bone interface were both increased, and the increase of stress and strain was much slower under buccolingual loading than that under vertical loading.

关 键 词：牙种植体 扭矩 有限元分析 应力 应变 载荷 

分 类 号：R318.01[医药卫生—生物医学工程]