Patent ID: 11903838
Assignee: nan
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 18:
19. A revision knee system comprising:
a polymeric tibial bearing monobloc defining a superior condylar articular bearing surface for a femoral component and a planar inferior tibial bearing face opposite the superior condylar articular bearing surface, the tibial bearing monobloc having a keel extending inferiorly from the inferior tibial bearing face; and
an inferior stem comprising an insertion end and a superior keel engaging end, wherein
the superior keel engaging end engages the keel inferiorly with respect to the inferior tibial bearing face along most of the length of the keel,
a portion of the keel forms an exterior of the revision knee system,
the keel extends outwardly from along the superior keel engaging end,
the keel comprises two adjacent spans which extend outwardly from the superior keel engaging end in a transverse plane, the two adjacent spans tightly fit the superior keel engaging end between respective inner surfaces thereof, and
the keel further comprises a vertical joining member between the two adjacent spans, the superior keel engaging end has two tines and the vertical joining member fits between the two tines, thus resulting in three sides each of the two tines being surrounded by the two adjacent spans and the vertical joining member.