摘要
目的:探讨上颌后牙区Ⅳ类骨质条件下不同长度和直径短种植体的骨界面应力分布情况,为临床上颌后牙区短种植体的临床设计选择提供理论依据。方法:采用三维有限元方法分析7种不同直径和长度的Bicon短种植体在Ⅳ类骨质条件下,受到垂直和侧向力时,种植体骨界面的应力分布和Von-Mises应力峰值。结果:无论是垂直载荷还是侧向载荷,种植体直径对骨界面的影响均比长度更显著。侧向载荷下,6*6mm组应力峰值最小,垂直载荷下,6*8mm组应力峰值最小,6*6mm组次之,直径5mm组中不同长度之间无明显差异。结论:上颌后牙区Ⅳ类骨质条件下短种植体长度与直径的选择中:骨量充足情况下,应优先选择6*6mm种植体;骨量适中情况下,选择5*6mm;骨量不够时选择4.5*8mm。
Objective： To analyze the stress distribution of short dental implant with different length and diameter in the type Ⅳ jaw bone of maxillary posterior area, providing the theoretical basis for the clinical design of short dental implant in the maxillary posterior region. Methods： Three dimensional finite element was used to simulate the stress size and distribution of implant-bone interface in 7 kinds of Bicon implants with different diameters and lengths under vertical loading and a 45 degree slope loading.Results： The effect of implant diameter on bone interface was more significant than that of length, regardless of vertical load or lateral load. Under the lateral load, the von-mises stresses of group 6＊6 mm was minimum. Under the vertical load, the von-mises stresses of group 6＊8 mm was minimum, the second place was group 6＊6 mm. There were no significant difference between 5 mm diameter implants with different length. Conclusion： The choice of short implant in the type Ⅳ jaw bone of maxillary posterior area： if the bone in good conditions, 6＊6 mm implant was suggested, if the bone in moderate conditions,5＊6 mm implant was suggested, if the width of bone was not enough, 4.5＊8 mm implant was suggested.
作者
涂慧娟
李月玲
俞明
TU Huijuan;LI Yueling;YU Ming(Department of General Dentistry, Shanghai Jiading District Dental Center, Shanghai 201800, China)
出处
《中国口腔种植学杂志》
2018年第1期1-5,共5页
Chinese Journal of Oral Implantology
基金
上颌后牙区骨量不足条件下应用短种植长度和直径有限元分析
基金来源:上海市嘉定区卫生计生委青年科研课题项目
基金编号:2014-QN-01
关键词
短种植体
有限元分析
VonMises应力
Ⅳ类骨
short dental implant
three-dimensional finite element analysis
von-mises stress
Type Ⅳ bone
