Linear Mandibular Distraction Osteogener

Abstract

The invention discloses a wire-type stretching bone formation device for a lower jaw chin. The wire-type stretching bone formation device comprises an arc track board; two screw sleeves extending outwards are oppositely arranged on the arc track board; a hollow force application screw is embedded into each screw sleeve; each force application screw is provided with a force application nut; the arc track board between the two screw sleeves is provided with two bone transport plate fixing splints fixedly connected with bone transport plates; the wire-type stretching bone formation device is also provided with two traction steel wires; one end of each of the traction steel wires is fixedly arranged on the bone transport plate fixing splint at one side, and the other side of each of the traction steel wires penetrates through the hollow part of the corresponding force application screw after penetrating into the screw sleeve at the opposite side, and is fixedly arranged on the corresponding force application screw. The wire-type stretching bone formation device is characterized in that the two traction steel wires are crosswise arranged at the outer side of the arc track board; when the two traction steel wires respectively move to certain ends of the respective connected force application screws, the two bone transport plate fixing splints move oppositely along with the two traction steel wires, and moreover, the bone transport plate fixing splints can optionally move on the arc track board. The stretching bone formation device is simple in structure, convenient to implant and easy and simple in clinical operation, and has a good effect in rebuilding the defect of the lower jaw chin.

Description

technical field [0001] The invention relates to a medical device, in particular to a distraction osteogenesis device for oral and maxillofacial surgery, in particular to a linear mandibular and chin distraction osteogenesis device. Background technique [0002] At present, there are many patients with mandibular and chin defects, mostly secondary to trauma and tumor resection, which bring very serious dysfunction and appearance damage to patients. There are many repair methods, including artificial material placement, autogenous bone implantation, distraction osteogenesis, etc. Due to artificial material placement and bone implantation, the surgery is not only complicated, but also increases the trauma of the donor site, and there is infection and necrosis of the grafted bone after surgery Even if the transplantation is successful, it is far from the reconstruction of the mandibular chin shape and function in the true sense, which is not conducive to the later restoration of...

AI Technical Summary

Problems solved by technology

However, the bone delivery disc in this distraction osteogenesis device can only be moved to the middle position of the arc-shaped track plate. Since most of the damage to the mandible is asymmetrical, if the distraction osteogenesis device is used, the bone transport on one side When the disc reaches the middle position of the arc-shaped orbital plate, the bone delivery disc on the other side has not yet reached the middle position, and the time of the entire mandibular distraction may be protracted virtually, which greatly reduces the efficiency of trifocal distraction

The bone delivery disc is a small bone segment with soft tissue and blood supply made on the outside of the tip of the mandible. Therefore, the bone delivery disc will be remodeled to varying degrees during the long-term distraction of the mandible. If the mandible is distracted for a long time , the sides connected by the two bone delivery trays will not be well connected together due to reconstruction and deformation, making the effect of mandibular reconstruction not good

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