Exposures to blood and body fluids among dental school-based dental health care workers

A survey of United States dental schools was conducted to determine the annual incidence of reported percutaneous and mucosal exposures to blood and other body fluids among dental school-based dental health care workers (DHCW). A response rate of 51.9 percent provided information on 10,433 DHCW and 1.6 million student clinic and 169,836 school-based faculty practice patient visits. This response represents approximately half of all DHCW and student clinic visits in U.S. dental schools in AY 1996/1997. A total of 652 exposures were reported, of which 629 occurred in student clinics. Dental schools averaged twenty-three reported exposures per year, and the overall annual reported exposure rate in student clinics was 4.0/10,000 patient visits and 1.3/10,000 in faculty practice. Dental students accounted for 62.5 percent of all reported exposures, a rate of 106.3/1000 students per year. The exposure rate for dental students was significantly greater that any other category of DHCW. Expressed in terms of person years, an exposure rate of 0.17 was comparable to that reported for dental schools but considerably less than found in other dental care settings. A second survey directed to individual DHCW drew responses from only 8.3 percent of the 10,433 DHCW. Among these respondents, 31 percent of those acknowledging an exposure reported it. A judgment that the injury was not serious, the time necessary to report an exposure, and a belief that the patient was healthy were the primary reasons for not reporting. The results of this study provide dental schools with benchmarks for comparing their reported exposure experience and assessing programs intended to prevent and manage exposures.

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