Novel gel thin-film capacitive sensor for measuring occlusal force of single pair of teeth and method

Abstract

The invention discloses a novel gel thin-film capacitive sensor for measuring occlusal force of a single pair of teeth and a method. The sensor comprises an insulating medium, wherein two layers of ionic gel serving as electrolyte are pasted to the upper surface and the lower surface of the insulating medium respectively; the insulating medium and the ionic gel are both soft and transparent and form a capacitor capable of changing along with pressure change; since two layers of ionic gel are pasted to the upper surface and the lower surface of the insulating medium respectively, the influence of an external stray capacitor on a measured result is avoided; a wire leading out of a metal electrode is connected to a collection card to form an ion-electron mixed current circuit to obtain a capacitance signal, and time-varying data of the occlusal force of a single pair of teeth are obtained through data operation; by the adoption of a novel gel material, it is ensured that the occlusal force of the teeth is measured accurately on the condition of truly restoring occlusion of the teeth to the greatest extent; the material has good repeatable measurement accuracy and is low in cost, easy to process, capable of being used in a one-off mode, clean and sanitary, and high transparency enables a user to observe changes of the teeth while the sensor transmits electric signals.

Description

technical field [0001] The invention belongs to a capacitive pressure sensor, in particular to a novel gel film capacitive sensor and a method for measuring the occlusal force of a single pair of teeth. Background technique [0002] Dental occlusal force can objectively reflect the damage degree of oral disease teeth, and has important reference value for the diagnosis of various periodontal diseases. However, people's perception of pain is regional. Therefore, it is necessary to measure the occlusal force of a single pair of teeth to help determine which pair of teeth is unhealthy in the region, and provide a quantitative reference for the accurate installation of dentures. However, the traditional tooth bite force measurement sensors have the following problems: First, the previous mechanical, resistance strain gauge or piezoelectric effect-based sensor probes are all hard sensor probes, and the subjects will have self-protection when biting the hard probe. Reflective sup...

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Problems solved by technology

However, the traditional tooth bite force measurement sensors have the following problems: First, the previous mechanical, resistance strain gauge or piezoelectric effect-based sensor probes are all hard sensor probes, and the subjects will have self-protection when biting the hard probe. Reflective suppression mechanism, the bite force value measured at this time is usually lower than the bite force value under normal conditions; secondly, the outer surface of the hard sensor probe usually needs to be covered with a layer of elastic material or rubber sleeve for protection, but The thickness of the sensor has a great influence on the measurement of the occlusal force value, and it is difficult to ensure complete disinfection of such rubber sleeves in clinical measurements; finally, traditional materials are opaque, and changes in teeth cannot be observed during the measurement process

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