AbstractThe present study evaluates the applicability of delivering oral hygiene instruction to patients in general dental practice by means of self‐educational programs. Patients (55) seeking dental treatment in 3 general dental practices in Denmark were divided at random into aconventional professional instruction group (C)in which each individual received personal instruction by the dentist and aself‐instruction group (S), in which the patients were given self‐educational programs. In order to evaluate the effect of the 2 types of instruction, the presence or absence of dento‐gingival plaque and gingival bleeding by probing was recorded prior to the instruction and after 3 and 6 months. The patients of the self‐instruction group (S) answered a questionnaire about the treatment 1 week after they had received the self‐instruction program. An identical improvement in oral hygiene and gingival health was recorded in both treatment groups after 3 and 6 months. This finding indicates, that the self‐educational programs were as effective in changing the oral hygiene habits of the patients as was personal oral hygiene instruction by dental personnel. The answers of the patients to the post‐treatment questionnaire reflected a favorable attitude towards the use of self‐edu