Tool for assisting in determining hinge shaft

Abstract

The invention discloses a tool for assisting in determining a hinge shaft. The tool for assisting in determining the hinge shaft is a personalized occlusion insertion piece obtained by vertically overlapping a plurality of thin plates, and different patients correspond to personalized occlusion insertion pieces with different thicknesses; the personalized occlusion insertion piece is designed to change the occlusion opening height of a patient, an electronic face bow is used as auxiliary monitoring, the height of the occlusion insertion piece is gradually increased, the maximum thickness of the occlusion insertion piece during pure rotation of the lower jawbone is found, and the personalized occlusion insertion piece of the patient is obtained. The tool provided by the invention has the advantages of high accuracy, high patient repeatability, low cost and short time, is beneficial to determining the hinge axis of the lower jawbone, and improves the convenience and precision of tooth and jawbone data positioning.

Description

technical field [0001] The invention belongs to the field of oral cavity, and in particular relates to a tool for assisting in determining a hinge axis. [0002] technical background [0003] When the mandible opens and closes the mouth in a small range, the mandible will simply rotate according to a horizontal rotation axis, which is also called the "hinge axis". [0004] In the process of determining the hinge axis, it is necessary to use a measuring device such as an electronic face bow. During the measurement process, the patient is allowed to make a small opening movement, and the electronic face bow is used to record the movement trajectory of the mandible. When the mandible is simply rotated , that is, it is determined that the axis around which the mandible simply rotates is the hinge axis. However, there is no relevant method and tool for how to record the exact position of the mandible when it rotates around the hinge axis. The measurement and related operations al...

AI Technical Summary

Problems solved by technology

[0004] In the process of determining the hinge axis, it is necessary to use a measuring device such as an electronic face bow. During the measurement process, the patient is allowed to make a small opening movement, and the electronic face bow is used to record the movement trajectory of the mandible. When the mandible is simply rotated , that is, it is determined that the axis around which the mandible simply rotates is the hinge axis. However, there is no relevant method and tool for how to record the exact position of the mandible when it rotates around the hinge axis. The measurement and related operations all rely on the electronic facebow, which increases the difficulty of the measurement operation, and due to the error of the instrument, there will be discrepancies in each measurement, and the repeatability is poor.

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