Successful treatment of dental caries, periodontal diseases and diabetes re
quires persistent daily self-care. The aim of this study was to evaluate th
e perception of self-efficacy as a common behavioral factor determining ora
l health behavior, diabetes self-care, and actual health status. Cross-sect
ional data relating to 149 insulin-dependent diabetes mellitus (IDDM) patie
nts were collected from patient records, and by clinical oral examination a
nd a quantitative questionnaire. The study population was recruited from di
fferent locations, and the participation percentage was 80%. Self-efficacy
scales associated with corresponding behaviors, and a dental self-efficacy
scale also correlated with dental caries. Dental self-efficacy correlated w
ith diabetes self-efficacy, diabetes adherence, and with HbA1(c). Also, log
istic regression analysis revealed that dental self-efficacy was related to
diabetes adherence. Further, those diabetics reporting a high frequency of
dental visiting had higher diabetes self-efficacy. As a conclusion, good d
ental self-efficacy has a positive influence on diabetes adherence. The res
ults suggest that the perception of self-efficacy may be a common behaviora
l factor determining diabetes self-care and oral health behavior.