An arthroplasty is a joint replacement.

The word 'arthro-plasty' means joint re-shaping, so the term includes all types of knee replacement, full or partial.

unicompartmental knee replacement total knee replacement components of a total knee replacement
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Interpositional discs

Mentioned for completeness.

An important issue.

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From the time of onset of osteoarthritis of the knee to aged 65 - the usual age when a surgeon considers it acceptable to do a knee replacement - there are many interventions that may help to slow the progression of the joint destruction. This eBook gives an overview of these interventions.

knee arthritis interventions