Fusion board for talonavicular and naviculocuneiform joints

Abstract

The invention relates to the technical field of medical instruments, in particular to a fusion board for talonavicular and naviculocuneiform joints. The fusion board comprises a fusion board near end, a fusion board middle end, a fusion board far end, a fusion board body I and a fusion board body II which are integrally formed, wherein a plurality of fixing hole for fixing the fusion board to talus, a navicular bone and a cuneiform bone are formed in the fusion board, the fusion board is provided with a bone setting surface, the bone setting surface at the fusion board near end is matched with the surface form of the talus, the bone setting surface at the fusion board middle end is matched with the surface form of the navicular bone, and the bone setting surface at the fusion board far end is matched with the surface form of the cuneiform bone. The fusion board adopts anatomic design, solves the problem of high probability of fusion loosening and fixing failure caused by adoption of hollow nails, straddle nails and the like for fixing, and further solves the problems that fixing is not firm, anatomic reconstruction of an arch during an operation is inconvenient and the like caused by fusion board breakage and fixing hole deformation due to the fact that the fusion board is required to be bent in a common fusion board operation and forms stress concentration.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a fusion plate for a talonovic wedge joint. Background technique [0002] Muller-Weiss disease is a clinically rare and unknown foot disease, also known as "adult navicular osteonecrosis". The disease mostly occurs in middle-aged and elderly women and is characterized by chronic pain in the midfoot, compression and fracture of the navicular bone, and varus deformity of the calcaneus. The most typical pathophysiological changes of the disease are subtalar joint varus and low arch, which is the so-called abnormal "varus-flat foot" deformity and the formation of "talar wedge joint". For patients who have been diagnosed and conservative treatment is ineffective, surgery is an effective treatment method. The commonly used operation method is fusion of the talonovicular wedge joint. The key to joint fusion is stable and distracted fixation. The existing fixation methods such a...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the fusion loosening and fixation failure that are easy to occur when using hollow nails and saddle nails in the prior art, the common fusion plate needs to be bent during the operation, which increases the operation time and the bending time The fusion plate is easy to form stress concentration, resulting in fracture of the fusion plate and deformation of the fixation hole, resulting in unstable fixation. At the same time, the fusion plate is mostly "X"-shaped, which fixes the talus and cuneiform bone across the joint, which is not conducive to intraoperative anatomical reconstruction of the arch of the foot.

[0005] The present invention provides a fusion plate for the talonovic wedge joint. The fusion plate is anatomically designed, which is convenient for anatomical reduction without pre-bending the steel plate during the operation. The fusion plate fixes the talus, navicular bone and cuneiform bone at the same time. It not only solves the problem of fusion loosening and fixation failure easily caused by hollow nails, saddle nails, etc., but also solves the problem that in ordinary fusion plate surgery, it needs to be bent to increase the operation time, and it is easy to form stress concentration, which will cause fusion plate fracture and fixation hole deformation, resulting in insufficiency of fixation. Issues such as firmness and intraoperative anatomical reconstruction of the arch of the foot

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