负荷下颌肯氏Ⅱ类可摘义齿游离端基牙牙槽骨位移的全息干涉测量  

Effects of Clasp Designs of Kennedy Class Ⅱ RPD on the Displacement of Alveolar Bone Around the Abutment Tooth—— An Under Load Hologram Study

作　　者：李满园[1] 肖茂春[1] 黎红[1] 付强[1] 

机构地区：[1]四川大学华西口腔医学院,610041

出　　处：《华西口腔医学杂志》2001年第2期80-82,共3页West China Journal of Stomatology

摘　　要：目的 :比较下颌肯氏Ⅱ类可摘局部义齿的不同卡环对基牙牙槽骨产生作用的差异。方法 :在离体人下颌骨上 ,设计制作 5种直接固位体的肯氏Ⅱ类可摘局部义齿 ,即RPA卡环、RPI卡环、改良RPI卡环、铸造三臂卡环、颊侧锻丝固位臂卡环。用全息干涉测量技术 ,比较 5种固位体使基牙颊舌侧牙槽骨产生位移的情况。结果 :近中支托卡环产生的位移小于远中支托卡环 ,杆型卡环产生颊侧牙槽骨位移分布均匀 ,圆环形卡环引起的颊侧位移集中在根尖。结论 :临床修复此类牙列缺损时应尽量使用近中支托和杆型卡环。Objective: This article is to investigate the effects of different clasp designs of Kennedy class Ⅱ RPD on the displacement of alveolar bone around the abutment tooth. Methods: This experiment was carried out by using a seperate human mandible. Five clasp designs were examined in this experiment,including RPA, RPI, modified RPI (mRPI), three-arm clasps and buccal wrought wired three-arm clasps. Hologramatic measurement was applied to record the different effects of these five designs of clasps on buccal and lingual alveolar bone. Results: The RPI clasp was found to cause the smallest bone displacement. Generally, the clasps with the mesial occlusal rest (RPA, RPI, mRPI) caused smaller bone displacements than those with distal occlusal rests. The bar clasps brought about evenly spread bony displacements, however, the circumferential clasp caused highly concentrated displacement around apical site of the abutment tooth. Conclusion: The results suggest that mesial occlusal rests and bar clasps are preferable designs in this kind of prostheses.

关 键 词：可摘局部义齿 游离端基牙 牙槽骨 全息干涉测量 

分 类 号：R783.6[医药卫生—口腔医学] R782.14[医药卫生—临床医学]