Method and device for calibrating orthodontic anchorage nail

Abstract

The invention discloses a method and a device for calibrating an orthodontic anchorage nail, belongs to the technical field of medical auxiliary instruments, and aims to solve the problem that an implantation position is deviated due to the fact that a tip position cannot be obtained in an implantation process of an anchorage nail in the prior art. The calibrating method disclosed by the inventioncomprises calibrating the tip of an anchorage nail and calibrating the axis direction of a central axis of the anchorage nail is calibrated. A process of calibrating the tip of an anchorage nail comprises the following steps: assembling a calibrating device, tracking position information of a tracking rigid body under an optical tracking device coordinate system so as to obtain a centroid under match of a V-shaped concave cone, and converting the centroid to a rigid body tracking coordinate system to use the centroid as the position coordinate of the tip of the anchorage nail. A process of calibrating the axis direction of the central axis of the anchorage nail comprises the following steps: obtaining a space coordinate of the rotation center of the tracking rigid body under the clampingstate of different positions of a long handle; fitting a straight line by a least square method; converting the central axis of the long hand to the tracking rigid body coordinate system; and normalizing the direction of the central shaft to use the normalized direction as the direction of the central axis of the anchorage nail.

Description

technical field [0001] The invention belongs to the technical field of medical auxiliary equipment, and in particular relates to an orthodontic anchorage nail calibration device and method. Background technique [0002] In orthodontic treatment, it is often necessary to choose absolute anchorage to resist the reaction force caused by the orthodontic force. The traditional methods of strengthening molar anchorage include transverse palatal bar, Nance arch, fixed lingual arch, and intermaxillary traction methods. Due to the uncertainty of the traditional methods, it may lead to the advancement of molars, which is difficult to meet the needs of patients. For the high requirements of treatment, the treatment effect cannot meet the expectations of patients, and it is uncomfortable to wear, and it is easy to cause various complications. [0003] With the development of medical technology, miniature implant anchorage—anchorage nails are widely used in orthodontic treatment. The an...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a device and method for orthodontic anchorage nail calibration, which solves the problem in the p...

Images