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Long-term results of low-friction arthroplasty.

Two long-term studies of total hip replacement, carried out at Wrightington Hospital, England, and already published in 1977 and illustrated in detail, have been presented in an abbreviated, and it is hoped, more readable form. The first of these studies averaged 13 years and the second 8.3 years, but the latter has been updated to a maximum period of 13 years by reference to hospital records of secondary operations. The failure rate of the first series was 1.5% and that of the updated second series now becomes 2.6%. Some suggestions are made to explain this difference.

Bone Cements↗

Socket wear in Charnley low friction arthroplasty of the hip.

Five hundred forty-seven Charnley hip arthroplasties were measured for wear radiographically after an average period of 8.3 years. The operations were performed in 1967 and 1968 and the average rate of wear was 0.07 mm per year. This is only half that recorded for the operations in 1963, 1964, and 1965. Clinical radiographic methods of measuring socket wear are valid provided that the socket is inserted with the wear marker not more than 10 degrees from the coronal plane. This can be estimated provided that radiopaque cement is used.

Adult↗

Pseudofolliculitis barbae. Medical consequences of interracial friction in the US Army.

Pseudofolliculitis barbae (PFB) is a minor disease affecting only, and almost all, blacks who shave. Because of a continued requirement by the US Army of clean shaven faces, significant interracial turmoil and animosity has been aroused. Unclear standards of care of the disease and haphazard policing of shaving habits led to a chaotic process with effective dermatologic care almost paralyzed by the hostile parties. Randomly approached lower-ranking enlistees and draftees are much more likely to complain about their disease, even if minor, and are more likely to refuse to shave and be unkempt even without permission to grow a beard (in contravention of Army regulations). Career black enlistees are likely to under-report the severity of their disease and not seek medical help, possibly because of fear of continuous harassment and inability to be promoted by their superiors. Lotion depilatories, or hair clippers, combined with routine lifting of ingrown hairs, are the most effective treatments, although complete cessation of shaving is first required.

Black or African American↗