Novel gel film capacitive sensor for measuring full-mouth tooth occlusal force and method thereof

Abstract

The invention relates to a novel gel film capacitive sensor for measuring the full-mouth tooth occlusal force and a method thereof. Each of the upper and lower surfaces of the insulating medium is pasted with a layer of ionic gel serving as electrolyte, two kinds of materials are soft and transparent, ionic gel is pasted on several points to form several capacitors which can change along with the occlusal force, the capacitors are connected in parallel, a layer of insulating medium is pasted on the upper surfaces of the capacitors, and a layer of insulating medium is pasted on the lower surfaces of the capacitors, influence of external parasitic capacitors is avoided, buses are connected to an acquisition card , and the total capacitance value under the action of full-mouth tooth occlusal force can be obtained, and therefore the full-mouth tooth occlusal force can be measured; the capacitive sensor resultant force measuring device can obtain the full-mouth tooth occlusal force by means of a simple parallel circuit, but a piezoresistive resultant force measuring device only can measure a single circuit, and cannot measure the cumulative sum, by employing the novel gel material, the tooth occlusion case can be simulated as real as possible to obtain the full-mouth tooth occlusal force, and the novel gel material has good repeated measurement precision, and is low in cost and easy to process, and is disposable, clean and sanitary.

Description

technical field [0001] The invention belongs to a capacitive pressure sensor, in particular to a novel gel thin film capacitive sensor and a method for measuring the occlusal force of full mouth teeth. Background technique [0002] Excessive occlusal force can lead to pathological remodeling of the periodontal tissue until the teeth become loose and fall off. Measuring the occlusal force of the full mouth teeth is of great significance for the diagnosis and treatment of dental diseases. Traditional occlusal test materials, such as occlusal paper, can measure the "occlusal result imprint", but cannot express the relative magnitude of the full-mouth occlusal force, and the accuracy is not good. Therefore, it is necessary to use a device that accurately measures the occlusal force of the full mouth to provide the occlusal force when the full mouth is in contact. Long-term excessive force and fall off lead to planting failure. However, the traditional tooth bite force measurem...

AI Technical Summary

Problems solved by technology

However, the traditional tooth bite force measurement sensor has the following problems: First, if the resultant force measurement device adopts a capacitive sensor, the bite force of the whole mouth is related to the total capacitance value of all parallel capacitive sensor units, and the total capacitance value in the parallel circuit is equal to The simple addition of the capacitance values ​​of each branch, but the current similar piezoresistive force measuring device cannot be implemented with this simple parallel circuit, it must be measured in a single way, and the measurement of the cumulative sum cannot be completed; secondly, the previous mechanical, resistance Strain gauge or piezoelectric effect-based sensor probes are hard sensor probes. When the subject bites the hard probe, there will be a reflexive inhibition mechanism for self-protection. At this time, the measured bite force value is usually lower than normal. The occlusal force value is lower, and the traditional material is opaque, and the change of the teeth cannot be observed during the measurement; finally, 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 no effect on the occlusion. The measurement of the force value has a great influence, and it is difficult to ensure complete disinfection of this kind of rubber sleeve in clinical measurement

Images