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US 4,224,698 AGranted
Acetabular cup for total hip replacements
OwnerClark N. Hopsoninventor
Life of this patent
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Abstract
An acetabular cup for total hip replacements is disclosed which provides radiographically opaque elements for the two halves of the periphery of the cup, said opaque elements having different configurations so that it is possible from an anterior-posterior radiographic view to determine whether the cup is facing anteriorly or posteriorly.
Claims3
In an acetabular cup for total hip replacement, having a locating hole in the face of said cup at the top;
- a radiographic marker system making possible the determination from an anterior-posterior radiographic view of the hip whether the cup is facing anteriorly or posteriorly, comprising a radiographically impervious element along one half of the open periphery of said cup beginning opposite said locating hole, and a radiographically impervious element along the other one half of the periphery of said cup, the configuration of the impervious elements along the two halves of the open periphery of said cup being different, allowing differentiation by X-ray of the anterior and posterior halves of the cup.
Dependencies are inferred from the claim text.