国产微螺钉种植体支抗压低牙齿动物实验研究

目的研究国产微螺钉种植体支抗压低磨牙过程中种植体-骨界面结合状况及种植体稳固度。方法4条成年Beagle犬分别于双侧下颌前磨牙根尖下植入国产微螺钉种植体共8枚。植入后即刻以种植体为支抗对下颌前磨牙施以压低力，力值100g，时间3个月。加力结束后进行种植体及其周围组织的组织学检查。结果所有被加载的8枚种植体均保持良好稳固度，无移位。下颌前磨牙垂直高度平均减小3．12mm，同时出现了一定程度的颊侧倾斜，未见明显根尖及根分歧牙骨质吸收。加载种植体平均骨整合率为39．5％。结论微螺钉种植体支抗可以完成牙齿的压低移动并可保持良好稳固度。骨整合主要发生在种植体-皮质骨界面，松质骨中极少发生骨整合。

Experimental study of microsrew implants as anchorage in intrusion of teeth

Objective To study the implant-bone interface of microscrew implant in the intrusion of teeth.Methods Microscrew implants were implanted below the mandibular first and second premolars of four Beagle dogs as anchorage to intrude the teeth.Loading period was 3 months and the intrusive force was 100g.After the experiment,histological measurement was made.Results All of the implants maintained good stability,and the mandibular premolar was intruded about 3.12mm on average.Conclusions All of the implants mainta...