Sensor output variation of prototype occlusal force measuring device

Abstract

This study aimed to clarify the output variation of the sensor of a developed prototype occlusal force measuring device. In Experiment 1, for 10 sensors using a calibration pressure device, seven types of loads from 100 to 700 N, in increments of 100 N were applied to the pressure sensitive part of each sensor three times. After recording the resistance values, the differences between the measurements and the sensors were investigated. In Experiment 2, the resistance value when a load of 100–700 N was applied to the pressure sensitive part of each sensor was measured on different days for 3 days, and the daily variation was investigated. In Experiment 1, no significant differences were observed among the three measurements; however, a significant difference was observed between the sensors. In Experiment 2, no differences were observed in the resistance values measured over 3 days for each sensor. Based on these results, the sensor of the developed prototype occulusal force measuring device showed no variation owing to repeated measurements, but variation was observed between sensors. Therefore, it is necessary to calibrate each sensor individually. Furthermore, no daily variations were observed in the output of any sensor, suggesting that the output was reproducible.