Subtalar joint fusion cage with calcium-phosphorus antibacterial ion composite coating and preparation method of subtalar joint fusion cage

By designing an arc-shaped substrate and a three-dimensional porous structure on the subtalar joint fusion device, and combining micro-arc oxidation and hydrothermal treatment to form a gradient functional coating, the problems of slow bone integration and high infection rate were solved, achieving rapid healing and low infection rate.

CN122440896APending Publication Date: 2026-07-24SHANGHAI SIXTH PEOPLES HOSPITAL +1
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Patent Information

Application Number
CN202610593341.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-30
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing subtalar joint fusion devices have insufficient bioactivity, slow osseointegration speed, and high infection risk. Current technologies have not been optimized for the unique anatomical morphology and high infection risk of the subtalar joint.

Method used

The subtalar joint fusion device is designed with a calcium-phosphorus antibacterial ion composite coating. It adopts an arc-shaped substrate and a three-dimensional porous structure. The gradient functional coating is formed through micro-arc oxidation and hydrothermal treatment to promote bone integration and provide long-lasting antibacterial properties.

Benefits of technology

It significantly shortens bone fusion time, reduces postoperative infection rate, improves surgical success rate, reduces complications, and improves patient prognosis.

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Abstract

The invention belongs to the technical field of orthopedic medical apparatuses and instruments, and discloses a subtalar joint fusion cage with a calcium-phosphorus antibacterial ion composite coating and a preparation method of the subtalar joint fusion cage. The subtalar joint fusion cage with the calcium-phosphorus antibacterial ion composite coating comprises an arc-shaped base body, the whole body is of a bent structure matched with the anatomical form of a subtalar joint, and the curvature radius of the arc-shaped base body is adjustable; the arc-shaped base body is of a three-dimensional porous structure. The composite functional coating grows on the surface of the arc-shaped base body in situ; the composite functional coatings located on the upper surface and the lower surface of the arc-shaped base body are different in activity, so that the dual functions of promoting osseointegration and resisting bacteria for a long time are achieved. According to the subtalar joint fusion cage, calcium and phosphorus bioactive components and zinc and silver antibacterial ions are integrated in the same in-situ growth membrane layer, so that the subtalar joint fusion cage has excellent bone induction activity and a strong antibacterial function at the same time, and by adopting gradient coatings with different activities, accurate matching of functions and anatomy requirements is further realized; the method is suitable for subtalar joint fusion scenes.
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