MẪU MÚI RĂNG CỐI SỮA THỨ HAI HÀM TRÊN NGƯỜI VIỆT

Abstract

Objectives: The aims of this study were to: (1) determine the frequencies of crown pattern trait of the deciduous upper second molars; (2) compare the crown pattern trait between the Viet and diferent population. Materials and method: With the descriptive cross - sectional study design, the sample consisted 496 teeth (256 boys, 240 girls, from 3 to 5 years-old). Crown pattern were evaluated, classified according to Hanihara method (1963). Results: The frequency of 3+B and 4- form of the deciduous upper second molars was highest (88.11%). There was significant difference of crown pattern trait between the Viet and different population (p < 0.001). Conclusions: In Viet dentition, the deciduous upper second molars had 3+B and 4- form that were highest. There was highest difference of crown pattern trait between the Viet and Japan (p < 0.001).