Uncemented tibial component of trabecular structure and making method of uncemented tibial component

Abstract

The invention provides an uncemented tibial component of a trabecular structure. The uncemented tibial component comprises a tibial plateau, a liner and the trabecular structure, wherein the trabecular structure is arranged on the lower surface of the tibial plateau; the tibial plateau and the trabecular structure are integrally molded; the liner is melted on the upper surface of the tibial plateau; and the upper surface of the tibial plateau is a rough surface having a micro-porous structure. Preferably, the porosity of the trabecular structure is 50-65%. The aperture of the trabecular structure is 300-800[mu]m. The tibial plateau is a metal tibial plateau. The trabecular structure is a metal trabecular structure. The liner is a non-metal liner. The invention also provides a making methodof the uncemented tibial component of the trabecular structure. The uncemented tibial component of the trabecular structure provided by the invention is firm and stable in structure, and a postoperative early fixing effect and long-term stabilization can be improved; and the uncemented tibial component is simple and convenient to use, long in service life, skillful in design, concise in structureand simple and convenient to make.

Description

technical field [0001] The invention relates to the technical field of orthopedic medical devices, in particular to the technical field of knee joint prosthesis replacement, in particular to a cementless tibial component with a trabecular bone structure and a preparation method thereof. Background technique [0002] Artificial knee arthroplasty is currently one of the most effective surgical treatments for relieving patients' pain and dysfunction. The fixation methods are divided into two categories: bone cement fixation and bone cement-free fixation. Bone cement fixation technology was applied earlier, and there were often risks such as loosening of artificial joints, osteolysis, and increased tibial stress shielding effect; non-cemented fixation was applied later, but there are also phenomena such as early instability of fixation and loosening of tibial components. It can be said that bone cement fixation is still one of the most commonly used ways of artificial knee joint...

AI Technical Summary

Problems solved by technology

[0005] 1. The connection structure between the tibial platform and the liner is complicated, and the matching accuracy is high;

[0006] 2. The combination of the tibial plateau and the liner is unstable, and there is a possibility of loosening to a certain extent, which will aggravate the wear of the back (the contact surface between the liner and the tibial plateau) and affect the service life of the artificial knee prosthesis

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