Inclusion Criteria:  Patients of both sexes who seek dental treatment at the Dentistry Clinic of Universidade Metropolitana de Santos. Be between 04 and 10 years old; Good general health; Present at least two tooth surfaces that can be included in the study.  Exclusion Criteria:  Dental surfaces with proximal restorations; Surfaces with evident proximal cavities (marginal crest break); Absence of adjacent tooth (absence of proximal contact).