Study done on Bottle feeding, increased overjet and Class 2 primary canine relationship
The study aim was to investigate the association between bottle feeding and prevalence rates of increased overjet and Class 2 primary canine relationship. The sample consisted of 911 children (461 boys, 450 girls) aged 3 (13.9%), 4 (40.8%), 5 (34%) and 6 (11.3%) years, with complete primary dentition.
Information about nutritive and nonnutritive (pacifier and/or digit) sucking habits was collected through questionnaires. Three calibrated dentists (κ: 0.9-1.0 and Rs > 0.90) performed the clinical assessments.
The children were divided into four groups: G1 – not bottle-fed; G2 – exclusively bottle-fed; G3 – breast- and bottle-fed, bottle feeding ceased before 3 years of age; and G4 – breast- and bottle-fed, bottle feeding ceased between 3 and 4 years of age.