Functional Outcomes in High-function-demand patients after total knee arthroplasty

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Rehabilitation Medicine

Background:

• Osteoarthritis necessitates joint replacement when conservative treatments fail.
• Total knee arthroplasty (TKA) is established for elderly, low-demand patients.
• Evidence for TKA efficacy in high-demand patients is limited.

Purpose of the Study:

• To evaluate the functional outcomes of TKA in high-function-demand patients.
• To compare TKA results between low- and high-function-demand populations.
• To determine if current TKA implants yield comparable results across activity levels.

Main Methods:

• Retrospective analysis of 552 patients from two prospective studies.
• Categorization into low (Krackow Activity Score [KAS] 1–9) and high (KAS 10–18) demand groups.
• Assessment using Knee Society Score, KAS, SF-36, range of motion, and pain at multiple postoperative intervals up to 2 years.

Main Results:

• Both low- and high-function-demand groups demonstrated significant improvements in function, range of motion, and pain at 2 years postoperatively.
• High-function-demand patients achieved functional improvements comparable to those in the low-function-demand group.
• No significant differences in demographic or comorbidity profiles were observed between the groups.

Conclusions:

• Total knee arthroplasty can achieve excellent functional outcomes in high-function-demand patients.
• Current TKA implants are effective for improving function and reducing pain in active individuals.
• TKA is a viable treatment option for a broader range of patients, including those with high functional demands.