Bottle Feeding 1 Breast Feeding 1 Child, Preschool 1 Cross-Sectional Studies 1 Dental Occlusion 1 Female 1 Fingersucking 1 Hong Kong 1 Humans 1 Infant 1 Male 1 Malocclusion, Angle Class II 1 Non-nutritive sucking habits Nutritive sucking habit 1 Pacifiers 1 Primary dental occlusion 1 Sucking Behavior 1 Surveys and Questionnaires 1 bottle feeding 1 breast feeding 1 cross-sectional study 1 female 1 habit 1 human 1 infant 1 male 1 malocclusion 1 pacifier 1 preschool child 1 questionnaire 1