Patent ID: 8894717

Claim:
A cup arranged to be inserted into a bone cavity and contact bone tissue, the cup comprising: a substrate having a convex surface, an apex and a rim; wherein the convex surface has a first area that includes an area about the apex, and a second area, the second area having at least a first interruption and a second interruption, at least the first area being configured to promote osseointegration, the second area having a first portion defined on one side by the rim and another side by the first interruption, the first portion configured to promote osseointegration to a lesser extent than the first area; wherein the second interruption is spaced from the first interruption and wherein each of the first interruption and the second interruption extends across portions of the convex surface of the substrate at predetermined angles relative to the rim, and wherein at least one of the first interruption and the second interruption extends from the rim at a first location along an arc.