无牙颌一侧上颌骨缺损修复设计的准三维光弹应力分析(Ⅲ)——杆式桥架设计对种植式赝复体支持组织应力分布的影响  

Design of the implant prosthesis in the edentulous unilateral maxillary defect-A quasi three dimensional photoelastic analysis(Ⅲ)The influence of different designs of the bar attachment on the stress distribution of the supporting tissue

作　　者：程唏[1] 赵铱民[2] 张铁 

机构地区：[1]北京军区总医院口腔科,100039 [2]第四军医大学口腔医院修复科

出　　处：《实用口腔医学杂志》2000年第5期396-397,共2页Journal of Practical Stomatology

摘　　要：目的 :采用三维光弹应力冻结切片法对杆式桥架超过中线 1cm和未超过中线两种设计的应力分布状况进行评价。方法 :在无牙颌一侧上颌骨缺损的光弹性模型中于 1、3、5 和 7位植入 4个种植体 ,杆式桥架采用超过中线 1cm和未超过中线两种设计 ,在单侧和双侧垂直载荷下观察种植体及其支持组织的应力分布状况。结果 :发现桥架超过中线 1cm的设计能更好地传递患侧载荷。结论 :在恢复缺损侧咀嚼功能方面 ,应优选桥架过中线objective:To study the influence of different designs of the bar attachment on the stress distribution of the supporting tissue.Methods:Four implants were anchored in a photoelastic edentulous unilateral maxillary defect model in position of[BHDWG1,WK1]1,[BHDWG1,WK1]3,[BHDWG1,WK1]5 and[BHDWG1,WK1]7,bar attachment were designed within or 1 cm beyond the central line and a removable overdenture was fabricated.Vertical forces were applied unilaterally or bilaterally.Resultant stress distributions in the photoelastic maxillary models were evaluated with three dimensional photoelastic frozen section method.Results:The bar 1 cm beyond the central line could convey the load of the defect side more efficently.Conclusion:The design 1 cm beyond the central line may be feasible to recover chewing function of the defect side.

关 键 词：义齿设计 骨内牙种植 应力分析 上颌骨缺损 

分 类 号：R783.6[医药卫生—口腔医学]