article was to evaluate the prevalence of posterior cross bite on the basis of gender. A cross-sectional study was carried out with 100 patients i.e 50 male patients and 50 female patients in Orthodontics Department, Fatima Memorial Hospital College of Medicine and Dentistry, Lahore under University of Health Sciences. Clinical examination of 100 patients and analysis of their pretreatment study casts were performed. SPSS (21.0) was used for data analysis. 32% of the patients had posterior cross bite
Forces acting on periodontium Introduction : During the development, the tooth is enclosed in the bony crypt and protected from the external environment. As it erupts, it is subjected to various external forces such as pressure from lips, tongue, cheeks, fingers, the pacifier, and exposure to food. These external forces positions the tooth in neutral position of the oral cavity ( 2 ) . To tolerate the forces, an in built shock absorber is created by nature for each individual tooth called periodontal