应用数字激光散斑技术分析比较种植与传统单端固定桥的受载位移

发布时间：2018-12-12 11:13

【摘要】：目的分析比较种植单端固定桥与传统单端固定桥受载时的位移情况。方法以3只Beagle犬为实验动物,均在上颌右侧(A区)建立传统单端桥模型,上颌左侧(B区)建立种植体支持的单端桥模型,通过数字激光散斑技术,研究比较桥体承受集中垂直载荷时两种单端桥各部分的位移情况。结果①桥体承受集中垂直载荷时,种植单端桥和传统单端桥位移分布规律一致,桥体位移最大,近缺隙牙种植体或基牙次之,远缺隙牙种植体或基牙位移最小,差异均具有统计学意义(P0.05);随着载荷量的增加,种植单端桥和传统单端桥各部分的位移均增加,差异具有统计学意义(P0.05)。②桥体承受等量载荷时,种植单端桥的位移比传统单端桥相应部分位移小,其差异具有统计学意义(P0.05)。结论数字激光散斑技术可用于测量口腔种植体、天然牙及烤瓷桥等的微小位移。桥体集中垂直受载时,种植单端桥与传统单端桥的位移分布规律一致,且前者相应部分位移较小,提示在合理设计的前提下,种植单端桥是一种有效的修复方式。
[Abstract]:Objective to analyze and compare the displacement of single-end fixed bridge with that of traditional one-end fixed bridge. Methods using three Beagle dogs as experimental animals, the traditional single-end bridge model was established on the right side of the maxilla (area A), and the model of single-end bridge supported by implant was established on the left side of the maxilla (area B). Digital laser speckle technique was used to establish the model. The displacement of each part of two kinds of single end bridges under concentrated vertical load is studied and compared. Results (1) when the bridge was subjected to concentrated vertical load, the displacement distribution of the implant bridge was the same as that of the traditional single bridge. The displacement of the bridge was the largest, the implant or abutment was the second, and the displacement of the implant or abutment was the least. The difference was statistically significant (P0.05). With the increase of load, the displacement of each part of planting single end bridge and traditional single end bridge increased, the difference was statistically significant (P0.05). 2 when the bridge body was subjected to the same amount of load, The displacement of the single end bridge was smaller than that of the traditional single end bridge, and the difference was statistically significant (P0.05). Conclusion Digital laser speckle technique can be used to measure the micro displacement of dental implants, natural teeth and porcelain bridges. When the bridge body is concentrated under vertical load, the displacement distribution law of the planting single end bridge is the same as that of the traditional single end bridge, and the displacement of the former part is relatively small, which indicates that the planting single end bridge is an effective restoration method under the premise of reasonable design.
【作者单位】：浙江大学医学院附属口腔医院牙体牙髓科;四川大学华西口腔医院修复科;重庆医科大学附属口腔医院大学城门诊;
【分类号】：R783.6

【参考文献】