Zirconium-niobium alloy partitioned bone trabecula single-compartment femoral condyle containing oxide layer and preparation method

Abstract

The invention discloses a zirconium-niobium alloy partitioned bone trabecula single-compartment femoral condyle containing an oxide layer and a preparation method. The preparation method comprises thesteps that zirconium-niobium alloy powder serves as a raw material, an intermediate product of the zirconium-niobium alloy partitioned bone trabecula single-compartment femoral condyle containing theoxide layer is obtained through 3D printing integral forming, then the zirconium-niobium alloy partitioned bone trabecula single-compartment femoral condyle containing the oxide layer is obtained through hot isostatic pressing, cryogenic treatment and surface oxidation, the femoral condyle comprises a femoral condyle articular surface and an osseointegration surface, and the osseointegration surface is provided with the bone trabecula in a partitioned manner. Micro-motion of the prosthesis and a bone interface can be reduced, the stress shielding effect of the prosthesis on bone tissue is reduced, the stress of the femoral condyle bone tissue is uniform, and the initial stability and long-term stability of the single-compartment femoral condyle are improved. According to the preparation method, excellent biocompatibility and bone ingrowth of the osseointegration interface and super-strong wear resistance and low wear rate of a friction interface are integrally realized; the femoral condyle bone trabecula has excellent compression resistance; and the compressive yield strength and plasticity of the solid part are enhanced.

Description

technical field

[0001] The invention relates to the field of artificial joints, in particular to a zirconium-niobium alloy containing an oxide layer and a trabecular single-compartment femoral condyle and a preparation method thereof. Background technique

[0002] The unicompartmental knee prosthesis is used to replace the unilateral diseased compartment of the knee joint. It has the characteristics of small surgical incision, less intraoperative osteotomy, and preservation of the knee ligament structure. Therefore, the recovery after unicompartmental replacement is fast and the preservation normal knee motion and proprioception.

[0003] Biological unicompartmental knee prosthesis can achieve effective fit between bone tissue and prosthesis interface, avoiding the defects caused by bone cement fixation. At present, most biological unicompartmental knee prostheses are double-coated (titanium microporous + HA coating), which has problems such as coating peeling off and uneve...

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