Short-term treatment outcome of the trabecular monoblock metal tibial components versus conventional cemented tibial components in total knee arthroplasty / 中国组织工程研究

ABSTRACT

BACKGROUND: Porous tantalum metal has been recognized for its effective initial stability and superior bone consolidation in artificial hip/knee reversions. However, the application of the trabecular monoblock metal tibial components in the primary total knee arthroplasty (TKA) still remains controversial. Some scholars think that the non-bone cement fixation of TKA affects the life of prosthesis, and even the soft tissue is easy to be adhered with the porous metal, which results in the stiffness or pain of the knee joint after surgery. OBJECTIVE: To compare the short-term clinical efficacy of the trabecular monoblock metal and conventional cemented tibial components in TKA. METHODS: Fourteen patients undergoing unilateral TKA with trabecular monoblock metal tibial components non-bone cement porous tantalum tibial platform, and 14 patients with TKA using conventional cemented tibial components were enrolled. All patients suffered from advanced knee osteoarthritis, and were followed up for 1-3 years to correct the clinical and radiological data. RESULTS AND CONCLUSION: (1) No case underwent secondary surgery. (2) The clinical and function American Knee Society Score scales, the range of motion of the knee during flexion and extension, and femorotibial angle at last follow-up did not differ significantly between two groups (P > 0.05). (3) Radiological results revealed no aseptic loosening of the prosthesis, or subsidence and displacement of the tibial platform during follow-up. (4) These findings suggest that the application of trabecular monoblock metal tibial components in TKA can obtain similar clinical and radiological outcomes with the conventional cemented tibial components, but the long-term survival rate of the prosthesis still needs to be further explored.