Patent ID: 11957590
Assignee: MATHYS AG BETTLACH
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A shell to be driven into a bone substance for a prosthetic joint,
having an outer lateral surface which is convexly curved, in cross-section, or
having an inner lateral surface which is convexly curved,
on which outer or inner lateral surface there is arranged a plurality of ribs,
wherein all ribs extend in the same direction under a pitch angle from 45° to 85° at the equatorial end toward a pole-sided end on the outer lateral surface or on the inner lateral surface, and
each rib has a flank projection area based on a plane running through a longitudinal extent of the rib and perpendicularly to the outer lateral surface or to the inner lateral surface, and a sum of the flank projection area of all ribs corresponds to at least one fifth of the entire outer lateral surface or the entire inner lateral surface.