The delayed achievements regarding mental health in the dental health field have prevented the possibility of social adjustment by mental patients. To promote mental health more effectively, dental health measures are needed that are based on the characteristics of a mental patient's condition. We conducted a follow-up investigation of the state of dental health since the last oral hygiene instruction. The subjects were patients of A mental hospital in Shizuoka. We surveyed the dental diseases: the caries experience was examined by DMF, the periodontal condition was examined by CPITN, the state of oral hygiene was examined by PHP, and caries activity was examined by S·T MEDIA®. The names of the recipients of past dental care were extracted from the examination data and comparison material for a total of 71 persons (34 men and 37 women) was obtained. The follow-up investigation of the state of dental health revealed that the caries experience, state of periodontal disease, state of oral hygiene, and caries activity had all improved. Improvement in the introduction of dental health care and dental remedial treatment was taken as a factor of this improvement. Dental health control program is necessary for mental patient's, in addition to dental treatment for them.
