Machado, Sónia-Cristina-SilvaManzanares Céspedes, María CristinaFerreira-Moreira, JoaquimFerreira-Pacheco, José-JúlioRompante, Paulo-Alexandre-Martins-AbreuUstrell i Torrent, Josep Maria, 1953-2020-05-062020-05-062018-12-011989-5488https://hdl.handle.net/2445/158841Background: little is known about the effect of non-nutritive sucking habits (pacifier and digital sucking) in the prevalence of molar Class in mixed dentition. The aim of this study was determinate the relation between non-nutritive sucking habits, and Angle´s molar Class, in the horizontal plane, and it´s relation with gender. A convenience sample of 326 children with ages between 6 and 12 years was selected from three schools of Oporto. Material and Methods: to collect the epidemiologic data, was used a method recommended by the WHO. An indirect questionnaire about the medical history, dental habits, was used. It was adapted from Sanchez-Molins and validated by Clinical Dental III of Integrated Dental University Institute Health Sciences, Gandra, Portugal. Results: in this study, 326 infants were examined in order to determine the prevalence of non-nutritive sucking habits. Only 45 observed children did not mentioned any kind of non-nutritive sucking habit; the remaining 281 children mentioned at least one potential bad habit. Children with non-nutritive sucking habits show a higher molar Class II percentage in females, while molar Class III is more frequent among males compared with children with no sucking habits. Conclusions: children with non-nutritive sucking habits, presented a higher-Class II prevalence with statistically significance. It was detected a direct relationship between Angle´s molar Class and gender.1 p.application/pdfeng(c) Medicina Oral SL, 2018MaloclusióDent molarInfànciaPortuguesosMalocclusionMolarChildhoodPortugueseinfo:eu-repo/semantics/article6837412020-05-06info:eu-repo/semantics/openAccess30697374