An artificial meniscus manufactured device that is slipped into the gap where a meniscus has previously been removed.
Standalone or part of an arthroplasty
Such engineered devices have been tried that are standalone and the metal one have not enjoyed great sucess although experimentors are trying plastic ones that have a certain amount of 'give'. Knee replacements, of course, usually have a plastic component that replaces the meniscus.
Postural stability after patient-specific interpositional knee spacer or total knee arthroplasty: a comparative study. Goetz J, Schiessl S, Baier C, Dullien S, Mueller K, Grifka J and Koeck F. Int Orthop. 2017 Jan;41(1):67-73. doi: 10.1007/s00264-016-3266-4. Epub 2016 Sep 6.