Older Knee Replacement Implants as Good as Newer Models

THURSDAY, Jan. 12, 2023 (HealthDay News) -- Older knee replacement implants are as good as newer models for total knee replacement (TKR), according to a study published in the January issue of BMJ Open.

Iain McNamara, M.D., from the Norfolk and Norwich University Hospital in the United Kingdom, and colleagues compared the newer design of TKR (Journey II BCS [JII BCS]) to older, more established designs (Genesis II) among 80 patients undergoing single-stage TKR. The primary outcome was the Oxford Knee Score (OKS), measured at six months.

The researchers observed no between-group difference in the OKS, with mean OKS scores of 42.97 and 43.13 for the JII BCS and Genesis II groups, respectively. In terms of secondary outcomes, significantly greater walking range-of-movement, higher peak knee flexion angular velocity during walking, and better postural control during quiet standing were demonstrated in the Genesis II group versus the JII BCS group.

"For the patient and surgeons, reassurance can be gained that older designs, with proven track record of function and survivorship, can provide the same patient reported and functional outcome as more modern designs," McNamara said in a statement.

The trial was funded by Smith+Nephew.

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