1.新疆医科大学第二附属医院口腔科 新疆 乌鲁木齐;2.乌鲁木齐大为创新信息科技有限公司 新疆 乌鲁木齐
1.The Second Affiliated Hospital of Xinjiang Medical University;2.Urumqi Dawei Innovative Information Technology limited Company
目的: 分析植骨因素和修复体因素对种植修复体内部结构及周围骨组织应力分布情况的影响。方法: 通过影像学资料建立两种唇侧骨质牙槽骨模型支持的两种修复体修复的上颌中切牙种植修复体模型,对其进行力学加载,分析描述植骨与修复体因素对植体内部各结构与植体-骨界面应力分布的影响。结果: 1.植骨组中固位螺丝唇侧体部处以及种植体唇侧骨组织中应力值远低于非植骨组,但种植体颈部处的应力情况植骨组则高于非植骨组。2.相同骨质条件下,二氧化锆全瓷冠组在固位螺丝唇侧体部应力值大于钴铬合金烤瓷冠组。结论:修复体因素对种植修复体内部结构及周围骨组织应力分布的影响不大,但植骨因素影响的唇侧骨质差异,可影响固位螺丝体部及植体-骨界面处的应力集中状况。
Objective: To analyze the influence of bone graft and prosthesis factors on the stress distribution in the internal structure and surrounding bone tissue of implant prosthesis. Methods: Two models of maxillary central incisor implants supported by two kinds of labial alveolar bone models were established by imaging data. The mechanical loads were carried out to analyze and describe the influence of the factors of bone graft and restoration on the stress distribution of the internal structure of the implant and the interface between the implant and bone.Results: 1. In the bone graft group, the stress values in the labial part of the retaining screw and the labial bone tissue of the implant were much lower than those in the non-bone graft group, but the stress in the neck of the implant was higher in the bone graft group than that in the non-bone graft group. 2. Under the same bone condition, the stress value of zirconia all-ceramic crown group on the lip side of retaining screw was greater than that of PFM crown group.Conclusion: Restoration factors have little effect on the stress distribution of the internal structure and surrounding bone tissue of implant prosthesis, but the difference of labial bone affected by bone graft factors can affect the stress concentration of the retaining screw and the implant-bone interface.