种植支持式单端固定桥斜向集中载荷下的三维位移  

Three-dimensional Displacement of Implant-supported Cantilever Fixed Partial Denture under Oblique Loading

作　　者：王宏仁[1] 李爱洁[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3期541-545,共5页Journal of Biomedical Engineering

摘　　要：本实验旨在研究种植支持式单端固定桥(CFPD)斜向集中受载时的三维位移。采用比格犬下颌骨作为实验对象,即刻种植ITI种植体两枚,建立以两种植体为基牙的种植支持式CFPD,采用数字激光散斑技术测量其在斜向加载时不同加载量下的三维位移。结果表明:斜向加载桥体时,随着载荷量的增加,基牙和桥体的位移量随之增大。在相同载荷下,桥体位移量最大,近缺隙侧基牙位移量次之,远缺隙侧基牙位移量最小;斜向加载基牙时,相应受载基牙位移量最大,桥体和邻近基牙位移量次之。在相同加载条件下,加载基牙时CFPD的位移量较加载桥体时的位移量小。因此,可认为种植支持式CFPD是一种可行的修复方式,但是在使用过程中要避免斜向受力,尤其是桥体的斜向受力。The purpose of this study was to research the three-dimensional displacements of implant-supported canti- lever fixed partial denture （CFPD） under oblique loading. One Beagle dog was used in this experiment. Two immedi- ate implants of ITI were inserted in the mandible of the dog, and the implant-supported CFPD which used the im- plants as abutments was made in vitro fresh mandible. Then the digital laser speckle technique was employed to measure the three-dimensional displacements of CFPD under different oblique loading. We found that when an ob- lique loading was exerted on the pontic, the displacement increased with increasing of load. Under equal loading, the displacement of the abutment near to the pontic was smaller than that of the pontic but greater than that of the abut- ment far from the pontic. When oblique loading was exerted on the abutment, the displacement of the direct loaded abutment was greater than that of the other abutment and the pontic. Under the equal loading, the displacement of implant-supported CFPD of loading on pontic was greater than that of loading on abutments. The experiments dem- onstrated that implant-supported cantilever fixed partial denture （CFPD） is an effective and advisable therapy for to- tally？ or partially edentulous patients. However, it is also suggested that the clinicians should avoid exerting oblique loading, especially the oblique loading of the pontic when the CPDF is used.

关 键 词：单端固定桥 牙种植 数字激光散斑技术 三维位移 

分 类 号：R783.4[医药卫生—口腔医学] R783.6[医药卫生—临床医学]