Objectives: To develop and to evaluate a questionnaire of self-perception and self-care habits on oral health on a first level population. Methods: A descriptive� observational stud� �as perfor�ed to validate a questionnaire on oral health self-percep-: A descriptive� observational stud� �as perfor�ed to validate a questionnaire on oral health self-percep-A descriptive� observational stud� �as perfor�ed to validate a questionnaire on oral health self-perception (UISESS-B). After non-probabilistic sa�pling� 94 users� 30-59 �ears of age� �ith either diabetes �ellitus 2� hypertension or obesity were included. Duration of disease was lesser than 10 years. Pearson's r, Cornbach's α, factorial anal�sis� chi-square and Snedecor's F tests �ere e�plo�ed. Results� � Pearson's r of 0.� and Cronbach's α of 0.�� was observed on the pre�post values of the �lobal �uestion� � � Pearson's r of 0.� and Cronbach's α of 0.�� was observed on the pre�post values of the �lobal �uestion� � Pearson's r of 0.� and Cronbach's α of 0.�� was observed on the pre�post values of the �lobal �uestion-naire. In the factorial analysis, the variance explained more than 60% for a first factor. � punctuation of very hi�h risk for the three groups �ith the scale UISESSS-B that coincides �ith the index CPO-D and the index UISESS-F �as observed. Conclusions: The UISESS�B scale shows si�nificant validity and reliability, su��estin� its use as a sensitive ins� tru�ent for the �easure�ent of oral health in people �ith chronic illnesses such as diabetes� h�pertension and obesit�.