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Development of evaluation system for dental implant mobility (stability)

牙种植体移动性（稳定性）评价系统的开发

基本信息

批准号：
11450162
负责人：
SARATANI Keiji
金额：
$ 4.16万
依托单位：
OSAKA DENTAL UNIVERSITY (2001)Okayama University (1999-2000)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

We have previously developed an automatic diagnostic system for tooth mobility, for measuring the biomechanical properties of human periodontium. Since the impedance head of the system is too large to measure mobility in an implant abutment and a molar, a simplified testing instrument called T-M tester was developed. A single-frequency vibration is applied to the tooth surface, an acceleration response is measured, and then the mechanical mobility of the priodontium is calculated. The tooth-movement transducer of the probe utilized a set of bimorph piezoelectric ceramic disks. It is therefore small, light, and suitable for oral examination. The basic characteristics of transducer and clinical applicability of the measurement probe are confirmed using an artificial model.The T-M tester was applied to implants to determine the difference of viscoelastic properties between periodontium and peri-implantium. The obtained results were as follows : it was possible to measure the implant mobility by T-M tester. Mobility-Index scores of the implants were smaller than those of teeth.We applied the same principle of T-M tester and developed an Implant Movement (IM) checker. In order to obtain the appropriate measuring conditions, we examined the IM checker on natural teeth. Moreover, we verified its performance by using artificial tooth models and implant models. In clinical trials, IM checker was able to evaluate the implant mobility (stability) and long-term change of implant integration.The newly developed IM checker had sufficient measuring reliability and we could objectively estimate the implant movement in dental clinics.

我们先前已经开发了一个自动诊断系统的牙齿移动，测量人类牙周组织的生物力学性能。由于该系统的阻抗头太大，无法测量种植体基台和磨牙的活动度，因此开发了一种称为T-M测试仪的简化测试仪器。对齿面施加单频振动，测量加速度响应，然后计算齿的机械活动度。牙位移传感器的探头采用了一套双压电晶片压电陶瓷盘。因此，它体积小，重量轻，适合口腔检查。利用T-M测试仪对种植体进行测试，比较种植体周围与牙周组织的粘弹特性差异。结果表明：用T-M测试仪测量注入迁移率是可行的。我们应用T-M测试仪的原理，研制了一种种植体移动检测仪。为了获得合适的测量条件，我们在天然牙上进行了IM检查。此外，我们使用人工牙模型和种植体模型来验证其性能。在临床试验中，IM检查器能够评估种植体移动（稳定性）和种植体整合的长期变化，新开发的IM检查器具有足够的测量可靠性，可以客观地评估牙科诊所中的种植体移动。