Dual mobility acetabular component
AssigneeJoint Development, LLC
InventorsEric M. Dacus, Thomas Collier
Life of this patent
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Abstract
The dual mobility acetabular component includes an acetabular cup and a liner that engage one another in a relatively static relationship by way of a Morse taper. The acetabular cup and the liner may be manufactured from a metal material (e.g., titanium) that decreases the energy differential therebetween, to limit or eliminate the galvanic cell phenomenon that forms between adjacent surfaces thereof as a result of body fluid therein that remains captured in small gaps or spaces due to capillarity. As such, the dual mobility acetabular component may experience reduced fretting compared to conventional hip joints known in the art.
Claims27
A dual mobility acetabular component, comprising:
- an acetabular cup having an internal curved surface at least partially comprising a first material;
- and
- a liner having an external curved surface at least partially comprising a second material and engageable with the internal curved surface of the acetabular cup for locking engagement therewith, the internal curved surface of the acetabular cup being relatively larger than the external curved surface of the liner thereby forming a capillarity gap in between when engaged, wherein the first material has an affinity for elections relatively comparable to that of the second material thereby inhibiting ionization of the first material relative to the second material across the capillarity gap.
A dual mobility acetabular component, comprising:
- an acetabular cup comprising a first material;
- and
- a liner comprising a second material and lockable relative to the acetabular cup in a manner forming a capillarity gap in between the first material and the second material, wherein the first material and the second material comprise titanium or a titanium alloy inhibiting ionization across the capillarity gap by way of equalizing an energy potential therebetween.
A dual mobility acetabular component, comprising:
- an acetabular cup having a base material different than a vapor deposited internal curved surface layer;
- and
- a liner having a base material different than a vapor deposited external curved surface layer that engages the vapor deposited internal curved surface layer in a manner forming a capillarity gap therebetween, the vapor deposited internal curved surface layer substantially shielding the base material of the acetabular cup and the vapor deposited external curved surface layer substantially shielding the base material of the liner to substantially equalize an energy potential between the acetabular cup and the liner thereby reducing ion exchange across the capillarity gap.
Dependencies are inferred from the claim text.