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Talus prosthesis

A prosthesis and talus technology, applied in prosthesis, medical science, joint implants, etc., can solve problems such as legacy dysfunction, achieve the effects of promoting bone fusion, increasing stability, and facilitating replacement

Active Publication Date: 2018-06-29
WEST CHINA HOSPITAL SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Resection of the talus reduces recurrence but leaves residual dysfunction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 , 2 As shown, the talar prosthesis disclosed in this embodiment includes a full talar prosthesis body, which is an anatomical structure, and the full talar prosthesis body includes a non-metallic material part 1 above and a metal material part 2 below, and the non-metallic material part 2 below. The metal material part 1 and the metal material part 2 can be combined and assembled to facilitate replacement during revision, and the non-metal material part 1 corresponds to the distal end of the tibia. The top surface of the metal material part 2 has an insertion groove 21, the bottom of the non-metal material part 1 is embedded in the insertion groove 21, the bottom of the non-metal material part 1 and the insertion groove 21 are interference fit, and the side wall of the insertion groove 21 has an opening The upward notch 22 is convenient for prying off the non-metallic material part 1 through the notch 22 . Of course, the metal material part 2 can also...

Embodiment 2

[0037] The difference between this embodiment and embodiment 1 is: as Figure 5 , 6 As shown, the talonovicular joint surface 25 is also a porous trabecular structure and / or the talonovicular joint surface 25 has a hydroxyapatite coating to fuse and stabilize the talonovicular joint. A fixation nail track 23 is also arranged on the talus navicular articular surface 25, and a fixation nail 3 is installed in the fixation nail track 23 during use for fixing the talus and the scaphoid. That is, if the articular surface has a porous trabecular structure or has a hydroxyapatite coating, then the articular surface can be fixed with nails 3 .

Embodiment 3

[0039] The difference between this embodiment and embodiment 1 is: as Figure 7 As shown, in the present embodiment, the talar scaphoid joint surface 25 belongs to the non-metal material part 1 .

[0040] The detachable non-metal material part and metal material part of the present invention are convenient for replacement during revision; the area adjacent to the bone adopts bone trabecular porous structure or hydroxyapatite coating, which can promote bone fusion; the convex part A is filled with The talus and calcaneus are spaced on the outside for added stability.

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Abstract

The invention relates to a talus prosthesis which comprises a complete talus prosthesis body. The complete talus prosthesis body comprises a nonmetallic material part on the upper side and a metal material part on the lower side. The nonmetallic material part and the metal material part can be combined and assembled. The nonmetallic material part comprises a trochoid articular facet and a medial malleolus articular facet. The metal material part comprises a subtalar articular facet. The nonmetallic material part or the metal material part comprises a talonavicular articular facet. Four to fivefastening nail channels are arranged on the metal material part. The subtalar articular facet and / or the talonavicular articular facet is / are of a porous bone trabecula structure or is / are provided with hydroxyapatite coatings. Due to the detachable nonmetallic material part and the detachable metal material part, replacement during revision is facilitated; the porous bone trabecula structure orthe hydroxyapatite coatings are adopted for the areas adjacent to bones, and bone fusion can be promoted; the gap outside a talus bone and a calcaneal bone is filled with a protruding part A, and stability is improved.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a talus prosthesis. Background technique [0002] The talus is the largest irregular bone in the human body and can be divided into three parts: head, neck, and body. There are 7 articular surfaces in the talus, the articular surface of the scaphoid, the anterior articular surface of the calcaneus, the medial articular surface of the calcaneus, the posterior articular surface of the calcaneus, the articular surface of the medial malleolus, the articular surface of the lateral malleolus, and the articular surface of the trochlear bone. The hub has important biomechanical functions. [0003] About 60% to 70% of the surface of the talus is covered by articular cartilage, and the rest is covered by periosteum. The talus itself has no independent blood supply, but only through ligaments and joint capsules. The primary bone tumor of the talus accounts for about 0.3% of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/42
CPCA61F2/42A61F2002/3006A61F2002/30092A61F2002/4207A61F2310/00179A61F2310/00011
Inventor 段宏屠重棋方向熊燕张闻力罗翼刘宏远
Owner WEST CHINA HOSPITAL SICHUAN UNIV
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