Early Functional Outcomes After Evolutionary Total Knee Arthroplasty: A Randomized Controlled Trial. Is New Always...

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Clinical Trials

Background:

• Total knee replacement (TKR) aims to improve patient function, but dissatisfaction rates remain significant.
• Evolving TKR designs seek to enhance patient outcomes and satisfaction.

Purpose of the Study:

• To compare the early functional outcomes of the ATTUNE knee implant system against the P.F.C. SIGMA system.
• To evaluate the noninferiority of the ATTUNE implant in a single-blinded, randomized controlled trial.

Main Methods:

• A single-blinded, noninferiority randomized controlled trial involving 150 patients undergoing TKR.
• Patients received either ATTUNE or P.F.C. SIGMA fixed-bearing, cruciate-retaining, cemented implants.
• Outcomes were assessed using range of motion, Oxford Knee Score (OKS), EQ-5D-5L, and SF-36 at multiple postoperative time points.

Main Results:

• No significant differences in clinical or functional outcome measures were observed between the ATTUNE and P.F.C. SIGMA groups at 1 year.
• Shorter tourniquet times in the P.F.C. SIGMA group did not impact final Oxford Knee Score.
• Similar proportions of patients achieved the minimal clinically important difference for the OKS in both groups.

Conclusions:

• The ATTUNE implant is not inferior to the P.F.C. SIGMA implant based on early functional outcomes.
• The study highlights the importance of randomized controlled trials for introducing new implant designs.
• Further research should investigate non-implant-related factors influencing patient outcomes after TKR.