Assessment of mobility in tooth and implant for designing superstructure

我们已经开发了一套牙齿松动自动诊断系统。在本研究的第一阶段，我们改进了这一系统以用于临床。我们试图建立正常受试者牙周健康牙齿的正常粘弹性范围。我们计算了三个参数的正常范围，下一阶段的目的是确定牙齿松动自动诊断系统是否适用于评估种植体的松动能力。选择了在患者身上一直起作用的IMZ植入物。种植体的力学参数均大于牙齿。为了确定牙和种植体之间的粘弹性特性的差异，我们研究了三个力学参数与天然牙和种植体的根冠比之间的相关性。在周围组织的数量和机械的Para…之间发现了相关性牙齿和种植体都需要更多的测量仪。然而，该系统规模相当大，而且价格昂贵。我们还开发了一种用于测量牙齿活动度(T-M)的测试仪。该测试仪具有体积轻便、测量快速等特点。建议将测量值作为活动性指数。使用T-M测试仪不仅可以定量测量牙齿的活动度，还可以测量种植体的活动度。最后一个阶段的目的是确定健康牙齿夹板固定是否对每颗牙齿的机械活动度产生影响。定期测量夹板牙和种植体的水平机械活动度。在实验期间，夹板牙齿的机械活动度的变异系数显著大于非夹板对照牙齿。在夹板开始后的几天内，夹板对每颗夹板的机械活动度的影响是非常显著的。在这项研究的案例中，用种植体夹板固定后，牙齿的活动性没有明显下降。较少

We have already developed an automatic diagnostic system for tooth mobility. In the first stage of this study, we improved this system for clinical use. We attempted to establish the normal range of viscoelasticity in periodontally healthy teeth in normal subjects. We calculated normal ranges of three parameters.The purpose of the next stage was to determine whether the automatic diagnostic system for tooth mobility was applicable for evaluating implant mobility. The IMZ implants, which had been functioning in the patients, were selected. The values of mechanical parameter in implants were larger than those in teeth. We found that our system could be utilized for evaluating implant mobility.To determine the difference of viscoelastic properties between teeth and the implants, we investigate a correlation between three mechanical parameters and root/crown ratio of natural teeth and the implants. A correlation was found between a quantity of the surrounding tissue and the mechanical para … More meters for both of teeth and the implants.The system is however, fairly in large scale and expensive. We have also developed a Tooth Mobility (T-M) tester for measuring mobility. The tester is characterized by portable size and rapid measurement. The measured value was proposed as Mobility Index. It was possible to measure quantitatively not only tooth mobility but also implant mobility by using the T-M tester.The purpose of the last stage was to determine whether of splinting of healthy teeth effected on the mechanical mobility of each tooth. Horizontal mechanical mobility of splinted teeth and implants were measured periodically. The coefficient of variation in the mechanical mobility of splinted teeth for periods of experiment were significantly greater than those in non-splinted control teeth. During a few days after the start of splinting, the effect of splinting on mechanical mobility of each tooth splinted was great significantly. In the cases of this study, the mobility of teeth did not decrease significantly after splinting with implants. Less