Abstract
Hospital and dental charts of 2,693 patients in whom total prosthetic joints had been placed at the Veterans Administration Hospitals of Ann Arbor and Allen Park, Michigan, as well as at The University of Michigan Hospital, were analyzed. Of the thirty (1.1%) late prosthetic joint infections (>6 months after placement), only one (0.04%) could be temporally associated with dental treatment. A Fisher's exact test of the data reflected that dental treatment in this population did not increase the incidence of late prosthetic joint infections ( p value is 0.0005). Nine of the thirty late infections occurred in insulin-dependent diabetic patients and patients on long-term immunosuppressive therapy. An analysis of the organisms isolated from the late infections shows that 54% where Staphylococcus epidermidis and Staphylococcus aureus. These data do not support the practice of prescribing prophylactic antibiotic coverage of prosthetic hip and knee joints prior to all dental therapy. Rather, use of antibiotics during dental treatment appears warranted only if a chronic bacteremia is anticipated or where a predisposing systemic condition may exist.
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