Partial knee replacement is similar to total knee replacement in that it is a resurfacing procedure. However, partial knee replacement refers to resurfacing only one of the compartments of the knee. The inside, the outside, or the kneecap area can be treated independently of the others. This option is appropriate for patients who have pain and arthritis isolated to a single portion of the knee.
I have extensive training in partial knee replacement since residency and fellowship. I was fortunate to train with Dr. Richard Scott in Boston and Dr. Richard Berger in Chicago who have some the nation’s greatest expertise in partial knee replacement. I have subsequently published papers on the topic, and continue to teach other surgeons the technique, as well as lecture at meetings on the outcomes.
Patients must be promptly identified with isolated or early arthritis to benefit most from the procedure. While total knee replacement is also a reliable option in these situations, partial knee replacement has the following potential benefits:
Studies have shown that partial knee replacement can be durable up to 15 years and beyond in the correctly chosen patient. In addition, if arthritis develops elsewhere in the knee, a partial knee replacement can be converted to a primary, or first-time, total knee replacement.
In 2016, I performed the most Zimmer Unicompartmental fixed bearing partial knee replacements in California, the thirteenth most in the United States. In addition, I performed the 5th most partial patellofemoral (kneecap) partial knee replacements in the United States.* I often serve as faculty to teach other surgeons how to perform partial knee replacement. I am the United States Lead Investigator of the new Persona Partial Knee System and participate in clinical research in partial knee replacement.
*based on industry database 2016
Less invasive partial knee replacement surgery
Partial Knee Publications
Riff AJ, Sah AP, Della Valle C. Outcomes and Complications of Unicondylar Arthroplasty. Clinics Sports Medicine, 2014;33(1):149-60.
Sah AP, Scott RD. Lateral unicompartmental knee arthroplasty via a medial approach- Surgical Technique. J Bone Joint Surg. 2008;90S:195-205.
Sah AP, Scott RD. Lateral unicompartmental knee arthroplasty via a medial approach- Study with an average 5-year follow-up. J Bone Joint Surg. 2007; 89:1948-54.
Sah AP, Springer BD, Scott RD. Unicompartmental Knee Arthroplasty in Octogenarians- Survival Beyond the Patient. Clin Orthop Rel Res. 2006;451:107-12.
Springer BD, Scott RD, Sah AP, Carrington R. McKeever Hemiarthroplasty of the Knee in Patients Less Than Sixty Years- Old. J Bone Joint Surg. 2006;88:366-71.
Partial Knee Ongoing Research
Lead investigator of United States, Zimmer partial knee evaluation, 2016-present
Principal Investigator, Zimmer Persona Partial Knee Surgeon Evaluator, 2017-
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