Maxillary protraction distraction device adjustable in direction and clinic application thereof

Abstract

The invention discloses a maxillary protraction distraction device adjustable in direction, and belongs to the field of distraction osteogenesis. The maxillary protraction distraction device comprisescasting band rings, a back connecting rod, a front connecting rod, a rotating screw and supporting rods. The rotating screw and the supporting rods are connected between the back connecting rod and the front connecting rod, and the casting band rings are connected to the bottoms of the back connecting rod and the front connecting rod respectively. According to the maxillary protraction distraction device, as the casting band rings, the back connecting rod, the front connecting rod, the rotating screw and the supporting rods are installed, cleft lip and palate and following maxillary developmental malformation can be effectively corrected through the distraction device placed on the upper-jaw cheek side, and influences on daily life of a patient are reduced; meanwhile, the horizontal and vertical movement directions of bone blocks can be conveniently adjusted in clinic application, so that overcrowding of teeth in a front dental zone of an upper jaw is effectively relieved through boneformation gaps obtained after horizontal distraction osteogenesis, and a front-tooth opening-closing phenomenon occurring when the bone blocks anticlockwise rotate is avoided through vertical distraction.

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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