THỰC TRẠNG LỆCH LẠC KHỚP CẮN CỦA HỌC SINH Ở MỘT SỐ TRƯỜNG TRUNG HỌC CƠ SỞ TẠI THANH PHỐ THANH HÓA

Abstract

Objectives: Describe the condition of malocclusion of students in some secondary schools in Thanh Hoa city. Subjects and methods: Cross-sectional study of 300 subjects in two secondary schools from 12 to 15 years old (75 students in each age) in Thanh Hoa city. Results: According to Angle’s classification of occlusion: Angle0 11.7%, Angle1 50.7%, Angle 2 24%, Angle 3 13.7%. The classification of occlusion has no statistical relationship with age and gender. A lack of space of 5-10mm accounts for 74% in the upper jaw and 68.7% in the lower jaw. A lack of space of more than 10mm accounts for 4% in the upper jaw and 3.7% in the lower jaw. There is an excess of space in 7% of the upper jaw and 13.3% of the lower jaw. Conclusions: Most of the cases studied had malocclusion. The Angle classification of occlusion had no statistical relation to age and gender, with the degree 1 being the most common. Most cases had a lack of space of 5-10mm in both jaws.