Abstract
The effect of a single dental health care instruction and prophylaxis on knowledge, attitude and behavior was evaluated. Army recruits [96] from two military camps were randomly allocated to 4 groups: a control group, a group that received an oral prophylaxis, a group that received a single dental health care instruction, and a group that had both prophylaxis and dental health care instruction. Treatment effects were measured by a questionnaire 1 mo. and 3 mo. after the instruction. A single dental health care instruction improved knowledge and some areas of behavior. The improvement in attitude was not clear. The improvements were small and showed a tendency to diminish after 1 mo.

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