A maxillary osteotomy positioner with adjustable thickness

Abstract

The invention discloses an adjustable-thickness maxillary osteotomy positioner and belongs to the technical field of medical equipment for plastic surgery; the adjustable-thickness maxillary osteotomy positioner comprises a nasal retainer, a buccal retainer, a buccal mucosal tension-compression plate, a handle and at least three guide plates. The nasal retainer and the buccal retainer are joined at the tail ends to form the handle, the buccal mucosal tension-compression plate is connected to the front end of the buccal retainer, the buccal retainer is provided with a slot for mounting the guide plates, two ends of each guide plate are provided with through holes, two ends of the slot are provided with a guide plate limiting post and a guide plate adjusting screw respectively which run through the guide plates along the through holes, and the guide plates are arranged along the width of the slot sequentially in parallel. The problems of poor osteotomy thickness precision and unparalleled cut planes in existing maxillary osteotomy are avoided; since the guide plates of the positioner may be adjusted up and down in the slot along its with, the positioner may adapt to the cut-off under different bone thicknesses during maxillary osteotomy.

Description

technical field [0001] The invention relates to the technical field of orthognathic plastic surgery medical instruments, in particular to a maxillary osteotomy positioner with adjustable thickness. Background technique [0002] Dental and maxillofacial deformities are caused by abnormal growth and development of the jaws, resulting in imbalances in the volume, morphological structure, and positional relationship between the upper and lower jaws and other craniofacial bones. System dysfunction. Maxillary jaw deformity usually manifests as insufficient or excessive three-dimensional development, maxillary occlusal plane deviation, etc. Clinically, maxillary Lefort I osteotomy and other surgical methods are mainly used to correct the developmental deformity of the maxilla. [0003] At present, maxillary Lefort type I osteotomy is often used to correct maxillary occlusal plane deviation. Before operation, computer-aided design is used to calculate the amount of deviation on bot...

AI Technical Summary

Problems solved by technology

However, the problem with this method of operation is that during the process of bone removal by the dynamic system, the upper and lower planes of the bone removal cannot be completely parallel, and bone interference points often appear when lifting one side of the maxilla, which cannot be achieved. The height of the lift requires grinding away the interference points during the operation, which virtually prolongs the operation time, increases the amount of bleeding, and increases the risk of the operation

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