Design and preparation method for customized fixing support used after repair of finger flexor tendon injuries

Abstract

The invention provides a design and preparation method for a customized fixing support used after repair of finger flexor tendon injuries. The method comprises the steps that a three-dimensional model of skin on the affected side of an arm and a three-dimensional model of skin on the uninjured side of a hand are reconstructed by utilizing CT scanning data, the three-dimensional model of the skin on the uninjured side of the hand is mirrored by taking a sagittal plane as a symmetry plane, and the three-dimensional model of the skin obtained through mirroring is used for replacing a corresponding part of the affected side and is combined with a forearm of the affected side to form a new three-dimensional model of the arm; the customized fixing support is designed by using the combined three-dimensional model as a basis, a finger part of the support adopts a rotary adjusting design, and therefore regular adjustment and coordination with early-stage functional exercise can be realized; and finite element analysis and mechanical experiments on the support are carried out, and the support is manufactured through 3D printing. According to the design and preparation method for the customized fixing support used after repair of the finger flexor tendon injuries, the designed and prepared customized support is accurate in shape, convenient to wear and good in fitting effect, and the method is superior to a traditional support manufacturing technology in terms of the precision, the machining efficiency, the material utilization rate and the like.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a design and preparation method for a customized fixation brace used to fix the hand after the repair operation of the finger flexor tendon injury. Background technique [0002] After surgery for finger flexor tendon injuries, plaster is often used to fix the patient's hand in a functional position. The plaster has poor air permeability, and long-term fixation may lead to problems such as adhesion between the tendon and surrounding tissues and limitation of tendon sliding function. Brace is another device used to fix the hand after surgery, but the traditional brace is handmade, and the manufacturing accuracy depends on the skill level of the maker. The processing process is more complicated, airtight and other problems. [0003] In view of the shortcomings of plaster fixation and traditional brace fixation, some new brace design and preparation methods have emerged in recent year...

AI Technical Summary

Problems solved by technology

201010011458.9 discloses a fixation brace after the fracture of the finger flexor key is repaired. There are hinge shafts between the forearm, the back of the hand, and the knuckles of the fingers to adjust the angle. Disadvantages of being fixed in a strong flexion position, but the size of the support increases due to the large number of movable adjustment parts

[0004] The existing technology does not disclose the three-dimensional reconstruction method for the affected part of the finger flexor tendon injury, which has special conditions such as tendon rupture, bleeding, swelling or even fracture, nor does it disclose the design method for the brace with functional position restrictions. The aspect of 3D printing production does not consider materials, performance, etc., so it is necessary to make further improvements

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