摘要
背景:种植体及种植体周围骨应力过大是影响种植体长期使用的主要因素之一,因此种植体外形的科学设计与选择是延长种植体使用寿命的重要手段之一。目的:对课题组前期开发的可任意调节角度牙种植体中的连接体螺钉和中央螺钉直径进行优化分析与设计。方法:使用Pro/E 5.0、Mimics 10.0、ANSYS Workbench 14.5软件建立含有可调节角度牙种植体的无牙牙合下颌骨有限元模型,分析种植体-骨组织系统的最大等效应力。结果与结论:从灵敏度曲线可以看出,种植体-骨组织系统的最大等效应力受连接体螺钉直径变化的影响颇大,而受中央螺钉直径变化的影响可以忽略不计。当施加垂直向力时,连接体螺钉直径为1.29 mm、中央螺钉直径为0.95 mm时,种植体-骨组织系统最大等效应力最小;当施加水平舌向力时,连接体螺钉直径为1.45 mm、中央螺钉直径为1.09 mm时,种植体-骨组织系统最大等效应力最小。结果表明连接体螺钉直径对下颌骨和种植体-基台复合体等效应力峰值的影响远大于中央螺钉直径,提示在种植体选择和设计中相对于中央螺钉而言应更重视连接体螺钉的选择和设计。
BACKGROUND：Oversize stress of a dental implant and its surrounding tissue is the main factor to affect the long-term use of dental implants. So, the reasonable and precise design of implant shape is one of the important methods of prolonging the life span of dental implants. OBJECTIVE：To make the optimal analysis and design of the diameters of connector screw and central screw of the adjustable-angle dental implant invented in the earlier stage. METHODS： The finite element analysis model of the edentulous mandible with adjustable-angle dental implant was established by software Pro/E 5.0, Mimics 10.0 and ANSYS Workbench 14.5. The maximum equivalent stress of dental implant-edentulous mandibular model was analyzed. RESULTS AND CONCLUSION：The maximum equivalent stress of dental implant-edentulous mandibular model was much more sensitive to the diameter of connector screw than central screw. The maximum equivalent stress was the least when the diameters of connector screw and central screw were 1.29 and 0.95 mm, respectively, under vertical load as well as when the diameters of connector screw and central screw were 1.45 and 1.09 mm under lateral lingual load, respectively. The results of this research showed that the maximum equivalent stress in the madibular-dental implant-abutment model was more affected by the diameter of connector screw than that of central screw, indicating that more attention should be paid to the choice and design of connector screw.
出处
《中国组织工程研究》
CAS
CSCD
2014年第34期5473-5479,共7页
Chinese Journal of Tissue Engineering Research
基金
国际合作项目(2011DFA61970)~~
