A Direction-Adjustable Anterior Maxillary Retractor and Its Clinical Application

Abstract

The invention discloses a maxillary anterior stretcher with adjustable direction, belonging to the field of distraction osteogenesis, comprising a casting belt ring, a rear connecting rod, a front connecting rod, a rotating screw and a supporting rod, the rear connecting rod and A rotating screw and a support rod are connected between the front connecting rods, and casting belt loops are connected to the bottoms of the rear connecting rods and the front connecting rods. The present invention is equipped with cast belt rings, rear connecting rods, front connecting rods, rotating screws and support rods, and can effectively correct the developmental deformity of the maxilla secondary to cleft lip and palate through the distractor placed on the buccal side of the maxilla, reducing the impact on the daily life of the patient. At the same time, it is convenient to adjust the horizontal and vertical movement directions of bone blocks in clinical applications, so that the osteogenic gap after horizontal distraction osteogenesis can effectively relieve the overcrowding of the maxillary anterior teeth, and vertical stretching can prevent the bone blocks from rotating counterclockwise The occurrence of anterior teeth opening and closing.

Description

technical field [0001] The invention relates to the field of distraction osteogenesis, in particular to a direction-adjustable maxillary anterior distractor and its clinical application. Background technique [0002] Cleft lip and palate is the most common craniofacial congenital malformation in my country, ranking second among all kinds of newborn birth defects; according to the data of the latest birth defect prevention report in my country in 2012, its incidence rate is as high as 11.43‰, and the vast majority of patients with cleft lip and palate Most of them are accompanied by malformation and defect of the jaw. The clinical manifestations are often insufficient development of the middle part of the maxillary surface and relatively excessive development of the mandible. The specific manifestations are anterior crossbite and upper dental arch crowding. Eating, pronunciation and physical and mental health. [0003] In recent years, external distraction osteogenesis technol...

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Problems solved by technology

[0003] In recent years, external distraction osteogenesis technology has been gradually introduced into the clinical correction of maxillary deformity secondary to cleft lip and palate, usually on the basis of maxillary LeFort I / II osteotomy, through external distraction device, slowly force forward The simultaneous osteotomy of the maxilla produces new bone tissue. Although the development of this clinical technique has solved some of the problems of easy recurrence after traditional orthognathic surgery, the distractor is large and needs to be fixed on both sides of the skull, which not only affects the Patients with daily life, and secondary intracranial infection, which limits its clinical application; the appearance of tooth-supported distraction osteogenesis placed on the palatal side solves the above problems, but because it can only move the bone block horizontally, In addition, if the forward displacement exceeds 10mm, it will easily cause the bone block to rotate counterclockwise, and the anterior teeth will open and close. A new type of distractor that can adjust the forward direction of bone fragments both horizontally and vertically

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