应用数字激光散斑技术研究触点紧密度对种植双端固定桥三维位移的影响  

Analysis of the Effect of Contact Strength on Three-dimensional Displacement of an Implant-supported Fixed Bridge under Axial-Concentrated Load Using Digital Laser Speckle Photography

作　　者：王峻[1] 彭真真[1] 李爱洁[1] 徐祖杰[1] 陈新民[1] 

机构地区：[1]四川大学华西口腔医学院,成都610041

出　　处：《生物医学工程学杂志》2013年第6期1235-1238,1243,共5页Journal of Biomedical Engineering

摘　　要：研究垂直集中载荷下触点紧密度对种植双端桥三维位移的影响。采用比格犬下颌骨建立种植双端桥生物离体模型，触点紧密度恢复为0～3四个等级。分别垂直集中加载基牙及桥体，采用数字激光散斑技术测量其三维位移。结果表明：触点紧密度主要影响双端桥近远中及颊舌向位移。触点紧密度为3时双端桥位移分布规律有所改变。实验证实数字激光散斑技术是一种有效的测量物体微小位移的方法，适宜的触点紧密度标准之一为有效减小种植体位移并且不改变位移分布规律。The purpose of this study was to investigate the effect of four kinds of different contact strength on the three-dimensional displacement of an implant-supported fixed bridge using digital laser speckle photography method. An in vitro model of beagle mandible with an implant-supported fixed bridge in its right premolar region was devel- oped. The bridge was Au Pt metal-ceramic. The contact was recovered to four different tightnesses, named 0, 1, 2, and 3. Different axial concentrated static load was applied to abutments and bridge respectively. The three-dimen sional displacement of the implant supported fixed bridge was measured using digital laser speckle photographic method. The results demonstrated that the influence of contact tightness was mainly on the mesio distal and buccal lingual parts. When the contact tightness reached number 3, the regularity of displacement distribution was changed. The present study proved that digital laser speckle photography was an effective method of measuring the micro-dis placement. One of the criterions of contact recovering decreased the implant displacement effectively without chan ging the regularity of displacement distribution.

关 键 词：数字激光散斑技术 种植双端固定桥 触点紧密度 三维位移 

分 类 号：R783.6[医药卫生—口腔医学]