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US 8,801,798 B1Granted
Bearing fixation
AssigneeBiomet Manufacturing, LLC
InventorAaron P. Smith
Life of this patent
Estimating the term…
Abstract
Disclosed is a bearing liner engageable within a shell member with an integrated projection portion. The integrated projection portion may deform a selected amount during positioning of the bearing liner within the shell. The shell may include a complementary engaging portion.
Claims11
A system for an acetabular prosthesis to fix a bearing liner within a shell, comprising:
- a shell member having an exterior configured to engage an anatomy and a concave interior;
- a bearing liner having an exterior wall surface configured to be received within the concave interior of the shell member, the exterior wall surface extending from a rim of the bearing liner towards an apex of the bearing liner along a substantially continuous curve, and an axial fixation projection extending from the substantially continuous curve of the exterior surface;
- wherein the axial fixation projection has a first projection surface extending from the exterior surface a first distance and at least one second surface extending towards the exterior surface at an acute angle relative to the first projection surface;
- wherein at least 51 percent of the material that forms the axial fixation projection is between a midline of the axial fixation projection and the apex of the bearing;
- wherein the axial fixation projections engages the shell to engage the bearing liner within the concave interior of the shell.
2 more elements
A system for an acetabular prosthesis to fix a bearing liner within a shell, comprising:
- a shell member having an exterior configured to engage an anatomy and a concave interior surface extending from a shell rim to a shell apex, an engagement groove is defined through the concave interior surface;
- a bearing liner having an exterior wall surface configured to be received within the concave interior of the shell member, the exterior wall surface extending from a rim of the bearing liner towards an apex of the bearing liner along a substantially continuous curve, an asymmetrical axial fixation projection extending from the substantially continuous curve of the exterior wall surface;
- wherein the asymmetrical axial fixation projection has a first configuration where a volume of material of the asymmetrical axial fixation projection is biased towards the apex of the bearing liner;
- wherein the asymmetrical axial fixation projection engages the engagement groove of the shell to engage the bearing liner within the concave interior of the shell in a locking configuration that is deformed from the first configuration due to insertion into the shell and engaging the engagement groove in a second configuration.
1 more element
Dependencies are inferred from the claim text.