A dental crown removing device based on an SMA wire

Abstract

The invention provides an dental crown removing device based on an SMA wire, which utilizes the principle that a phase change occurs when the SMA wire is heated and shrinks rapidly, and drives a toothextracting hook to output a single large pulling force to remove the tooth crown. The SMA wire of the device is installed between the upper insulation base and the lower insulation base through the fastening slider, the lower insulation base is fixed in the sleeve, and the upper insulation base drives the tooth extraction hook to move with the shrinkage of the SMA wire through the transmission rod. In the initial state, the pre-compressed return spring provides a certain stress for the SMA wire, and the SMA wire is tensioned. When working, the circuit is energized, the SMA wire is heated andcontracted, the tooth extraction hook is driven to work, and the recovery spring is further compressed. During the reset, the circuit is powered off, the SMA wire is cooled, and under the action of the elastic recovery force of the recovery spring, the SMA is restored to the initial length, the upper insulation base, the transmission rod and the tooth extraction hook are returned to the initial position, and the device is reset. The device has the advantages of simple structure, automatic generation of pulling force, rapid response, low noise and long service life, and can be continuously andrepeatedly used.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an oral cavity crown removal device. Background technique [0002] Tooth extraction is the most common treatment method in oral and maxillofacial surgery, and it is also the basis of dental implants, which has a direct and decisive effect on the timing and method of dental implants. Dental crown removal is an important step in tooth extraction. Traditional dental crown removal uses chisels, dental hammers, dental pliers and other instruments for surgery. These devices not only bring huge psychological pressure to patients during the operation, but also cause local tissue swelling, pain and bleeding, and even fluctuations in blood pressure, body temperature, and pulse. They also have short-term eating difficulties and long-term pain and swelling after surgery. and other adverse reactions. [0003] With the development of medical technology and oral and maxillofacial surgery, the c...

AI Technical Summary

Problems solved by technology

The single-pull crown remover of these two principles is a manual type of crown removal device, which requires a lot of hand force when using it, resulting in a low one-time removal rate, repeated operations, and slow response during use. , the vibration and noise generated are large, which not only affects the patient's psychology, but also prolongs the operation time

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