摘要
目的 :揭示中间种植体基牙天然牙 -种植体联合固定桥种植体周围骨组织应力分布规律 ,为临床设计天然牙 -种植体联合桥提供理论依据。方法 :采用三维有限元法建立模型 ,利用有限元分析软件 Super- SAP 93计算受载后种植体周围骨组织应力值。结果 :种植体周围骨组织应力水平以其颈部皮质骨处为高 ,集中斜向载荷下种植体周围骨组织最大应力是集中垂直载荷下应力的 2 .5倍 ,集中垂直载荷时颈部最大拉应力出现在舌侧皮质骨边缘处 ,集中载荷下种植体周围骨组织压应力峰值高于拉应力峰值。结论 :设计中间种植体基牙天然牙 -种植体联合固定桥时不仅需消除咬合高点 ,而且应减小颊舌向力。
Objective To discovery the stress distribution in bone around the implant of middle implant-teeth fixed bridge under different loading. Methods The model was set up by 3-D finite element means. The stress in bone around the implant under loading was computed by finite element analysis software Super-SAP 93. Results The biggest stress in bone around the implant lied in the neck cortex of bone. The biggest stress in bone around the implant under concentrated oblique loading was 2.5 times as big as that under concentrated vertical loading. The peak value of tensile stress lied in the boundary of lingual cortex of bone under concentrated vertical loading. The biggest compressive stress was higher than the biggest tensile stress under concentrated loading. Conclusion It is important not only to absent abnormally high occlusal points, but also to reduce side direction force for arrangement of natural teeth, middle implant, and fixed bridge into balanced occlusion.
出处
《吉林大学学报（医学版）》
CAS
CSCD
北大核心
2004年第6期941-943,共3页
Journal of Jilin University：Medicine Edition
基金
长春市科委社会发展基金资助课题 (0 1- 10 7S0 31)
关键词
牙种植
牙植入体
义齿
局部
固定
牙应力分析
dental implantation
dental implants
denture, partial, fixed
dental stress analysis
