Upper jaw Le Fort I type osteotomy operation guide plate and design method thereof

Abstract

The invention discloses an upper jaw Le Fort I type osteotomy operation guide plate and a design method thereof; the operation guide plate is used for fixing 4 titanium plates on the front wall of the upper jaw so as to rectify cranio-jaw-facial deformity; the guide plate comprises a guide plate body and guide holes; the guide plate body comprises a left structure and a right structure mutually separated; the left and right structures are respectively used for operation of the left upper jaw and right upper jaw; the outer surface of each structure is provided with an osteotomy line and a plurality of guide holes; the osteotomy line is provided with a plurality of osteotomy line mark holes penetrating the structure; a positioning hole is arranged on each guide hole and the structure; one ends, close to the nose cavity, of the two structures are respectively provided with a piriform aperture edge limit composition; a spina nasalis anterior limit composition is arranged below the piriform aperture edge limit composition; the inner surface of the structure is provided with a water guide slot. The invention also provides a method designing the upper jaw Le Fort I type osteotomy operation guide plate.

Description

technical field [0001] The invention relates to the field of auxiliary devices for maxillary LeFort type I osteotomy, in particular to a maxillary LeFort type I osteotomy guide plate and a design method thereof. Background technique [0002] Maxillary LeFort type I osteotomy is the most commonly used surgical method in orthognathic surgery for the correction of various maxillary skeletal deformities. Whether the maxillary dental segment can be accurately moved to the position designed in the preoperative surgical plan during the operation is the most critical factor in determining the postoperative aesthetic and functional effects of the patient. [0003] The traditional surgical procedure is to use the intermediate occlusal guide to determine the moving position of the maxillary dental segment after cutting the maxilla along the LeFort I-type osteotomy line. The traditional clinical method is to complete the model surgery according to the designed operation plan before the...

AI Technical Summary

Problems solved by technology

However, since the anterior wall of the maxilla is relatively flat, the positioning of the guide plate itself may be deviated. Therefore, when these surgical guide plates determine the new position of the dental bone segment, the guide plate itself needs to be firmly fixed first, and the steps are relatively cumbersome.

This type of guide plate that appeared in the existing literature reports is because the commercialized titanium plate and titanium nail are used to fix the moved maxilla. Therefore, this type of guide plate is mostly composed of two guide plates, one is a guide plate for osteotomy, and the other is a guide plate for fixation , it is more cumbersome to use in surgery

At the same time, using a bent commercial titanium plate to fix the dental bone segment is time-consuming, and may cause stress due to the incompatibility between the titanium plate and the bone surface

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