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

Abstract

A new type of gel film capacitive sensor and method for measuring the occlusal force of a single pair of teeth. The sensor includes an insulating medium. The upper and lower surfaces of the insulating medium are each pasted with a layer of ion gel as an electrolyte. Both substances are soft and transparent A capacitor that can change with pressure is formed, and a layer of insulating medium is pasted on the upper and lower surfaces to avoid the influence of external parasitic capacitance on the measurement results; the lead wires of the metal electrodes are connected to the acquisition card to form an ion-electronic mixed current circuit. Capacitance signal, through data calculation to obtain the change data of the occlusal force of a single pair of teeth with time; the capacitive sensor uses a new type of gel material to ensure accurate measurement of the occlusal force of the teeth under the condition of restoring the occlusion of the teeth as much as possible, and the material has good repeatability Accuracy, low cost, easy processing, one-time use, clean and hygienic, and high transparency allow the sensor to observe changes in teeth while transmitting electrical signals.

Description

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

AI Technical Summary

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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