Partial Knee Replacement: Higher Satisfaction, But More Reoperations | Orthopedics Today

Partial Knee Replacement Offers Better Range of Motion, Patient Satisfaction Than Total Knee Replacement

• Patients who underwent partial knee arthroplasty had a higher reoperation rate compared to total knee arthroplasty.
• Partial knee arthroplasty was associated with a greater range of motion and higher patient satisfaction compared to total knee arthroplasty.

Latest ORLEANS — Although partial knee arthroplasty for anteromedial arthritis had higher reoperation rates, results presented at the American Academy of Orthopaedic Surgeons (AAOS) Annual Meeting showed it had higher range of motion and patient satisfaction compared with total knee arthroplasty.

“If you see a patient who has anteromedial arthritis, they have predominantly arthritis of the medial compartment with an intact ACL and a pretty normal feeling knee with good range of motion, both partial and total knee replacement are good options and reasonable options,” Craig J. Della Valle, MD, chief of adult reconstruction and the Aaron G. Rosenberg Endowed Chair and Professor of Orthopaedic Surgery at Rush University Medical Center, told Healio. “But I would still err on the side of partial knee replacement given the higher patient satisfaction and higher range of motion. My perspective is if the results are pretty similar, why wouldn’t you do the smaller operation?”

Della Valle and colleagues analyzed data from 105 knees in patients who underwent either partial knee arthroplasty (n = 56) or total knee arthroplasty (n = 49) at a minimum 2-year follow-up (signify follow-up, 4.9 years). Outcome measures included implant survivorship, revision rates, Knee injury and Osteoarthritis Outcome Score for Joint Replacement (KOOS JR), and patient satisfaction scores.

Della Valle and colleagues found there was a higher reoperation rate in the partial knee arthroplasty group compared with the total knee arthroplasty group. However, KOOS JR scores and Knee Society Scores were comparable between the two groups.

the partial knee arthroplasty group had a greater range of motion and higher patient satisfaction compared with the total knee arthroplasty group.

“We confirmed that if you are choosing between a partial and total knee replacement, if range of motion is something that is significant for the patient, a partial knee may be a better choice,” Della Valle said.

He added, “We are going to continue to follow these patients to see what happens over time. We looked at an average of just under 5 years. I want to appear at these same patients in 5 more years and understand what they look like then.”

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Craig J. Della Valle, MD, can be contacted at [email protected].

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