When arthroplasty involves first debriding and then resurfacing a joint by placing a foreign material-such as fascia,metal,or a silicone spacer-between the articulating surfaces of a joint,it is called a(n):

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Interposition arthroplasty involves placing a foreign material between the articulating surfaces of a joint. This is different from abrasion arthroplasty which involves removing and reshaping the joint surfaces, excision arthroplasty which involves removing the joint entirely, and hemireplacement arthroplasty which involves replacing only a portion of the joint.

When Arthroplasty Involves First Debriding and Then Resurfacing a Joint