Gel thin film array capacitor sensor and method for measuring total teeth dynamic occluding

Abstract

The invention discloses a gel thin film array capacitor sensor and method for measuring total teeth dynamic occluding. A layer of ion gel as an electrode is pasted to upper and lower surfaces of an insulation medium respectively, and the upper ion gel is distributed in rows, the low ion gel is distributed in columns and the insulation medium is projected to the middle, the three are partially coincided to form a capacitor array; a layer of insulation medium is pasted to each of the upper and lower surfaces to avoid influence of an external stray capacitance, a row column scanning method is used to obtain capacitor signals at different sensing points to obtain a contacting sequence of each pair of teeth, occluding force during contacting and change along with time in all teeth occluding, the capacitor sensor has high precision and high flexibility, a high resolution means that slight force change can be measured, a new gel material is used to ensure accurate measuring of the dynamic occluding process under the condition of restoring the actual tooth occluding, and the material has good repeated measuring precision, and due to high transparency, the sensor can observe tooth change while transmitting an electric signal.

Description

technical field [0001] The invention belongs to an array type capacitive pressure sensor, in particular to a gel thin film array type capacitive sensor and a method for measuring the dynamic meshing of the whole dentition. Background technique [0002] In the dynamic meshing process of the whole dentition, which pair of teeth contact first, the magnitude of the interaction force during the contact, and the force change with time during the occlusal process are important basis for the dentist to diagnose the occlusal status of the patient's teeth. Traditional occlusal test materials, such as occlusal paper, can measure the "occlusal result imprint", but cannot accurately measure and record the sequence of occlusal contact or the relative magnitude of occlusal force, and the accuracy is not good. Therefore, it is necessary to design a measuring device that records the force distribution and time of the full-mouth occlusal contact and the corresponding relationship between the ...

AI Technical Summary

Problems solved by technology

However, the traditional tooth bite force measurement sensor has the following problems: First, the capacitive sensor has high precision and high sensitivity, high resolution ensures the sensitivity to force, can sense small changes in force, and has good temperature stability. The accuracy of the resistive sensor used is greatly affected by the external environment such as temperature, and the resolution is not high, so it is difficult to record the change trend of the occlusal force in the process of full dentition engagement with high precision; secondly, the previous mechanical, resistance strain gauge or Based on the piezoelectric effect and other hard sensor probes, the subject will have a self-protective reflexive inhibition mechanism when biting the hard probe. At this time, the measured bite force is often lower than the normal value of the bite force. Moreover, traditional materials are opaque, and changes in the teeth cannot be observed during the measurement process; finally, the outer surface of the hard sensor probe is usually covered with a rubber sleeve for protection, but the thickness of the sensor has a greater impact on the measurement of the bite force, and this type of rubber sleeve is in It is difficult to ensure complete disinfection in clinical practice

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