The thickness of the ultrahigh-molecular-weight polyethylene used in t
he tibial inserts of total knee arthroplasties has become topical in r
ecent years. A discrepancy has been found between the nomenclature of
tibial inserts and the actual minimum thickness of polyethylene. Altho
ugh the recommended minimum thickness is being discussed, it is import
ant to clarify what is actually being used, with an indication to chan
ge and unify how these inserts are named.