NON-IMPINGING DUAL MOBILITY HIP PROSTHESIS
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United States of America
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Issued Date -
Jan 16, 2025
app pub date -
Dec 16, 2022
filing date -
Dec 16, 2022
priority date (Note) -
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Abstract
Dual mobility hip prosthesis has a liner rim that recessed with respect to an acetabular cup rim thereof so that an adjacent contact surface of the neck impinges the acetabular cup rim at extreme positions without impinging the liner rim. Furthermore, the acetabular cup rim defines an inner contact face correspondingly angled to the adjacent contact surface of the neck at the extreme positions to reduce point contact loading between the acetabular cup rim and the adjacent contact surface of the neck. As such the present prosthesis tolerates prosthetic impingement between the rim of the acetabular cup and the neck of the femoral component by mitigating against point contact loading force whilst eliminating impingement of edges of the polymeric liner between an edge of the neck and the rim of the acetabular cup and also allowing for sufficiently deep acetabular componentry with reduced likelihood of dislocation.
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