In vivo 3-dimensional measurement of the force exerted on a tooth during clenching
In vivo 3-dimensional measurement of the force exerted on a tooth during clenching
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DOI：
10.1016/j.jbiomech.2006.01.004
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发表时间：
2007-01-01
影响因子：
2.4
通讯作者：
Sasaki, K.
中科院分区：
文献类型：
--
作者：
Kawaguchi, T.;Kawata, T.;Sasaki, K.
我们已经开发了一个三维（3D）的牙齿测力装置，并使用它来测量功能的力量在体内。它包括形成金属芯（基台）的内部部件、3D压电力传感器和形成金属冠的外部部件，所有部件都通过钢螺钉连接在一起。力传感器可沿z轴测量+/-沿着500 N，沿x轴和y轴测量+/-沿着150 N。我们评估了输出和负载之间的关系以及迟滞和温度对输出的影响。该传感器具有高线性（r > 0.9999）、低滞后（最大1.7%）和高热稳定性（沿着每个轴向每度0.05%）。将测量装置安装在健康男性受试者的上颌左第二磨牙上;该牙齿已进行牙髓治疗（去除神经血管束）并准备用于金属基台和牙冠。根据传感器输出计算的3D载荷表示为基于法兰克福水平（x-y）和矢状（y-z）平面的坐标矢量。最大自主握紧期间测得的力约为170 N;力矢量从牙冠向内侧以与y-z平面成约10度的角度指向牙根，并向后以与x-z平面成约3度的角度指向牙根。该传感器将能够测量施加到不同类型的假肢的力，并有可能提供重要的基本体内数据，用于使用计算机模拟进行分析。(c)2006爱思唯尔有限公司保留所有权利。
We have developed a three-dimensional (3D) force-measuring device for teeth and used it to measure functional forces in vivo. It comprises an inner part forming a metal core (abutment), a 3D piezoelectric force transducer, and an outer part forming a metal crown, all joined together with a steel screw. The force transducer can measure +/- 500 N along the z-axis and +/- 150 N along the x-and y-axes. We evaluated the relationship between output and load and the effects of hysteresis and temperature on the output. The transducer had high linearity (r > 0.9999), low hysteresis (1.7% at maximum), and high thermal stability (0.05% per degree) along each axis. The measuring device was mounted on the maxillary left second molar of a healthy male subject; the tooth had been endodontically treated (neurovascular bundle removed) and prepared for metal abutment and a crown. The 3D load calculated from the outputs of the transducer was expressed as a vector of the coordinates based on the Frankfort horizontal (x-y) and sagittal (y-z) planes. The force measured during maximum voluntary clenching was about 170 N; the force vector was directed from the crown to the root medially at an angle of about 10 degrees from the y-z plane and posteriorly at an angle of about 3 degrees from the x-z plane. This transducer will enable measurement of forces applied to different types of prosthetic appliances and has the potential to provide important basic in vivo data for analysis using computer simulation. (c) 2006 Elsevier Ltd. All rights reserved.