Special internal fixing device for proximal tibia joint osteotomy

A fixation device and osteotomy technology, applied in the field of medical devices, can solve the problems of insufficient structural stability, inconvenient surgical operation, and difficulty in determining the exact position and direction of additional screws.

Pending Publication Date: 2022-03-04
UNIV OF SHANGHAI FOR SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the Tomofix internal fixation system and additional screws are used for fixation in CPTO surgery, but it is difficult to determine the exact position and direction of the additional screw

Method used

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  • Special internal fixing device for proximal tibia joint osteotomy
  • Special internal fixing device for proximal tibia joint osteotomy
  • Special internal fixing device for proximal tibia joint osteotomy

Examples

Experimental program
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Embodiment 1

[0048] In order to cooperate with the combined proximal tibial osteotomy and improve the firmness, reliability and ease of operation of the internal fixation, this embodiment provides a special internal fixation device for the proximal tibial combined osteotomy. For its structure, see Figure 1 to Figure 3 As shown, it includes a support plate 1 and a number of locking screws 4. The support plate 1 is composed of a proximal head 101, a middle connecting portion 102, and a distal tail 103 that are sequentially connected and integrally formed. The proximal head 101 is attached to the tibia The front medial surface of the proximal platform, the distal tail portion 103 fits on the front medial surface of the tibial shaft, the proximal head portion 101 and the distal tail portion 103 are respectively provided with locking screw holes 2, and the middle connecting portion 102 is also provided with a locking / fastening screw hole. Press the combined hole 3, and the locking screw 4 is re...

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PUM

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Abstract

The invention relates to a special internal fixation device for proximal tibia joint osteotomy, which comprises a supporting steel plate and a plurality of locking screws, the supporting steel plate is composed of a proximal head, a middle connecting part and a distal tail which are sequentially connected and integrally formed, and locking screw holes are respectively formed in the proximal head and the distal tail. The middle connecting part is further provided with locking/pressurizing combined holes, the locking screws are arranged in the locking screw holes and the locking/pressurizing combined holes respectively in a matched mode, the locking screw holes in the near-end head comprise a first screw hole, a second screw hole and a third screw hole which are horizontally arranged and additional screw holes located in the corner positions of the lower portion of the near-end head, and the additional screw holes are matched with the first screw hole, the second screw hole and the third screw hole. The mounting angle of the additional screw hole meets the condition that the direction of the locking screw placed in the additional screw hole is perpendicular to the osteotomy surface of the tibia intercondylar bulge. A more stable knee joint biomechanical environment can be provided for treating introversion knee osteoarthritis by combining the proximal tibia with osteotomy, and compared with existing steel plate internal fixation, the knee joint internal fixation device is firmer and more reliable.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a special internal fixation device for combined osteotomy of the proximal end of the tibia. Background technique [0002] Knee osteoarthritis is a common chronic joint disease in knee surgery, with high prevalence, wide range of lesions, and severe late dysfunction. Knee varus is the most common deformity in knee osteoarthritis, also known as "O-shaped leg". It is formed by the joint action of two pathological factors, extra-articular and intra-articular. Proximal tibial open osteotomy (OWHTO) is a common method for the treatment of varus knee osteoarthritis. It is mainly used to correct extra-articular deformities and has a strong ability to correct force lines, but intra-articular deformities still remain after surgery. Tibial intercondylar osteotomy (TCVO) is mainly used to correct intra-articular deformities, but its ability to correct the force line is weak, and its ...

Claims

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Application Information

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IPC IPC(8): A61B17/68A61B17/80A61B17/86
CPCA61B17/68A61B17/8061A61B17/8057A61B17/808A61B17/8605A61B17/8625A61B2017/8655
Inventor 赵改平嵇伟平李冬燕罗从凤
Owner UNIV OF SHANGHAI FOR SCI & TECH
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