摘要
目的：三维有限元分析上颌后牙区应用短种植体的最小长度和直径。方法：上颌后牙区CT扫描、建立带种植体-基台复合体的三维有限元模型,设置短种植体的直径变化范围为4-6mm和长度变化范围为6-8mm,模拟口内环境对种植体进行负载,调节直径和长度的值,分析种植体-基台复合体位移变化,对上颌后牙区应用的短种植体进行优化。结果：垂直（颊舌）向加载条件下,随着变量直径（D）和长度（L）的增加种植体-基台复合体位移峰值先增大后减小,变化范围分别为1.15-1.86（E-2）Mpa和1.90-4.97（E-2）MPa,下降幅度分别为38%和61%。变量D对其位移峰值的影响大于变量L。垂直向加载时,当D≥4.90mm且L≥4.75mm,种植体-基台复合体位移峰值曲线的曲率位于-1和0之间。颊舌向加载时,当D≥4.90mm且L≥4.90mm,种植体-基台复合体位移峰值曲线的曲率位于-1和0之间。结论：从生物力学角度考虑,上颌后牙区种植体要选择长度≥4.90mm,直径≥4.90mm的种植体。
Objective： Using 3D finite element model to analayzeysis the least length and diameter of short implant in maxillary posterior region by using 3D finite element model. Methods： Constructing t The posterior maxilla- implant- abutment complex 3D finite element model after CT scanning was constructed. We Setrangedting the short implant diameter and length variation range werefrom 4 ~ 6mm andto 6 ~ 8mm. Analyzing implant- abutment complex displacement changes in simulated intraoral environment were analyzed when adjusting the short implant diameter and length under the loading. Short implant in maxillary posterior region was optimization analyzsised. Results： Under vertical（ buccal- lingual） loading condition,the implant- abutment complex displacement peak increaseds first and then decreaseds,coupling with diameter and length increasing. The change range wasis 1. 15 -1. 86（ E- 2） Mpa and 1. 90 - 4. 97（ E- 2） Mpa,respectively,and decreased 38% and 61%,respectively And the variation of the peak displacement was more sensitive to diameter than to length. Under vertical loading condition,the response curve curvatures of the implant- abutment complex displacement peak ranged from- 1 to 0,when D≥4. 90 mm and L≥4. 75 mm. Under buccal- lingual loading condition,the response curve curvatures of the implant- abutment complex displacement peak ranged from- 1 to 0,when D ≥4. 90 mm and L ≥4. 90 mm.Conclusion： Considering biomechanics,posterior maxillary short implant selection of length to diameter should be more than ≥4. 90 mm.
出处
《黑龙江医药科学》
2015年第4期29-30,34,共3页
Heilongjiang Medicine and Pharmacy
基金
黑龙江省卫生厅科研课题面上项目
编号:2012-227
佳木斯大学科研项目
编号:L2012-033
黑龙江省教育厅科研课题
编号:12541815
关键词
短种植体
三维有限元分析
直径
长度
short implant
three-dimensional finite element analysis
diameter
length
