Tooth preparation undercut detection device

Abstract

The invention provides a tooth preparation undercut detection device. The tooth preparation undercut detection device comprises a horizontal guide rod, a left arm, a right arm, a slider, a positioningblock, a measuring pin and a positioning pin. One end of the left arm is movably connected with the slider through a connector, the other end of the left arm is connected with an end of the right arm, the other end of the right arm is connected with the positioning block, the positioning block is fixed to one end of the horizontal guide rod, the other end of the horizontal guide rod is movably passed through the slider, the lateral side of the slider is provided with a limiting block, the limiting block is provided with a through hole, the measuring pin is passed through the through hole, anda top plate of the slider is provided with an elastic limiting rod and a rigid limiting rod. The tooth preparation undercut detection device has the advantages that taking a mold to duplicate a modelis not required, time is saved, whether a preparation has an undercut can be quickly detected, and the device is suitable for any tooth site and can be extended to any position with operational spacelimited, such as a posterior tooth; ink marking on the measuring pin enables the position of the undercut in a tooth to be detected and marked, and indicating can be achieved during continual tooth preparation.

Description

technical field [0001] The invention relates to a tooth preparation undercut detection device. Background technique [0002] When the prosthodontic department uses a full crown to repair tooth defects or a pontic to repair dentition defects, the first step is to prepare the abutment teeth into a shape suitable for the full crown or pontic. This process is called tooth preparation. . In order to ensure the smooth placement of the full crown or bridge, the abutment teeth should be prepared in the shape of a truncated cone with a small upper end and a larger lower end, without undercuts. If there is an undercut in the prepared tooth tissue, it will not only affect the seating of the crown, but also cause a gap between the tooth tissue and the crown. [0003] At present, the method of detecting undercuts is mainly to observe the converted tooth male model on a dental viewer. This method is time-consuming and laborious, and the steps are cumbersome. For example, Chinese patent...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a tooth preparation undercut detection device to solve the problem in the prior art of observing the tooth model after being turned on the dental scope. Tooth tissue undercut method, but due to the limited operating space in the mouth, it often leads to unclear vision, and it is impossible to mark the tooth tissue that needs to be removed, and there is no indication for the elimination of undercuts

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