BACKGROUND Recent studies show malocclusion rate among Mongolian population is increasing year by year. Malocclusion has a strong relationship with dental caries and its complications. Cephalometric measurement norms are one of the important tools that are used for diagnosis and treatment of malocclusions. Nowadays there are no cephalometric linear measurement norms among Mongolian population according to age and sex. Background of this study was to determine cephalometric linear measurement norms among Mongolian children. METHODS Total 161 children of 6 years old were participated in this study and 79 (36 male and 43 female) children with normal occlusion were selected to determine cephalometric linear measurement norms. Winceph 11.0 program is was used for measurements. RESULTS From all participants’ children with normal occlusion occupied 49% (79 children). Result of measurement results shows no significant statistical differences between males and females. CONCLUSION These cephalometric linear measurements norms will be standard norms for Mongolian children and it is very important tool for orthodontic practice.

Background: Class III malocclusion is considered to be one of the most difficult and complex orthodontic problems to treat. For patients whose orthodontic problems are so severe that neither growth modification nor camouflage offers solution, surgery to realign the jaws or reposition dentoalveolar segments is the only possible treatment option left. Objective: The treatment objectives were to: (1) level and align the dental arches; (2) obtain an ideal overbite and overjet, to establish correct anterior guidance; and (3) improve the facial profile. Results: Excellent facial and occlusal results were achieved with this surgical-orthodontic management, post-treatment results showed a Class I relationship and ideal overjet and overbite. The facial profile became straight type. Conclusions This case report describes the treatment of a female with dental and skeletal class III relationships. Surgical-orthodontic treatment was the best option for achieving an acceptable occlusion and a good esthetic result in this case. An experienced multidisciplinary team approach ensures a satisfactory outcome.