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Adjustable mid-face bone tractor and design method thereof

A technology of bone distractor and design method, applied in the field of medical equipment

Inactive Publication Date: 2010-09-08
STOMATOLOGICAL HOSPITAL NO 4 ARMY SURGEON UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the single forward traction of the existing external fixation skull retractor is far from meeting the clinical needs.
However, there is no report about an externally fixed skull distractor that can achieve lateral traction at different angles and can also be forwardly tracted at the same time.

Method used

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  • Adjustable mid-face bone tractor and design method thereof
  • Adjustable mid-face bone tractor and design method thereof
  • Adjustable mid-face bone tractor and design method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: as figure 1 As shown, an adjustable mid-face bone retractor at least includes a bracket, a skull fixation nail 4, a titanium traction nail 9, and a traction wire 10. 1 is composed of fixedly connected adjustable connecting rods through detachable connectors; the middle part of arc-shaped connecting frame 1 is fixedly connected with bracket connecting block 2 through detachable connecting parts; arc-shaped connecting frame 1 can fix one or more adjustable connecting rods according to needs Rod, the adjustable connecting rod is connected with traction screw 6 and traction nut 7. The adjustable connecting rod is composed of a vertical connecting block 5 and a vertical connecting rod 8 vertically fixedly connected, and the vertical connecting rod connecting block 5 is fixedly connected at any position on the draw-in groove 3 of the arc-shaped connecting frame 1 . A plurality of traction screws 6 are connected to the vertical connecting rod 8, facing different...

Embodiment 2

[0018] Embodiment 2: as figure 2 As shown, the left maxillary fragment of the patient is to be pulled forward and lateral, and rotated laterally. The implementation method is basically the same as that of Embodiment 1, the difference is that two adjustable connecting rods are fixed on the arc-shaped connecting frame 1, that is, the original adjustable connecting rod on the right side of the arc-shaped connecting frame 1 is placed adjacent to the left side. An adjustable connecting rod is fixed, and one end of a traction titanium nail 9 can be fixed on the outer surface of the patient's left maxillary segment, and the other end of the traction titanium nail 9 is connected to the traction screw on the vertical connecting rod 8 from the intermaxillary through the traction wire 10 6. The maxillary segment can be drawn outward by first rotating the traction nut 7 clockwise; one end of the second traction titanium nail is fixed on the end of the patient's left maxillary segment clo...

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Abstract

The invention relates to a bone tractor, in particular to an adjustable mid-face bone tractor and a design method thereof. The bone tractor comprises a bracket, a cranial bone fixing pin, a traction titanium pin and a traction fiber at least. The invention is characterized in that the bracket is formed in a way that a cambered connection frame with clamping grooves is fixedly connected with adjustable connection rods by removable connection parts; the middle part of the cambered connection frame is fixedly connected with a bracket connection block by removable connection parts; and one or more than one adjustable connection rods can be fixed on the cambered connection frame as required, the adjustable connecting rods are connected with traction screw rods and traction nuts, and the traction of the mid-face bones of a patient is completed by the traction fiber. By adjusting the antero-posterior position of the traction fiber, the invention can meet the requirements for the multi-point, multi-direction and force-adjustable traction of the mid-face bones in such treatment, thereby achieving the optimum treatment effect of reconstructing the face.

Description

technical field [0001] The invention relates to a bone distractor, in particular to an adjustable midface bone distractor and a design method, belonging to the field of medical instruments. Background technique [0002] Skull-fixed mid-face bone distractors (Mid-face Distraction OsteogenesisDevices) are sometimes called externally fixed skull distractors. For patients with hypoplasia of the maxilla, the existing external fixation cranial distractors can only pull the part of the maxillary segment forward after Le Fort osteotomy, so as to restore their normal facial shape. For patients with depression after fracture of the mid-face bone, the broken bone segment can only be pulled forward to make it reset. For patients with hemifacial atrophy, only part of the mid-face bone fragments can be pulled forward to restore their facial shape as much as possible. However, most patients still need to pull some bone segments in the middle of the face to the side to restore the fullnes...

Claims

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Application Information

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IPC IPC(8): A61B17/62
Inventor 冯志宏耿建平赵铱民刘彦普赵晋龙
Owner STOMATOLOGICAL HOSPITAL NO 4 ARMY SURGEON UNIV PLA
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