정상교합자와 Ⅲ급 부정교합자의 수완부 골성숙 단계와 치아석회화도에 대한 연구 = A STUDY OF THE SKELETAL MATURITY STAGES OF THE HAND-WRIST AND THE TOOTH CLACIFICATIONS STAGE IN SUBJECTS WITH NORMAL OCCLUSION AND CLASS Ⅲ MALOCCLUSION

다국어 초록 (Multilingual Abstract)

To investigate the relationship between the calcification stages of mandibular canines and the skeletal maturity stage of the hand-wrist in subjects with normal occlusion and Class Ⅲ malocclusion, hand-wrist radiographs and panoramic radiographs were taken from subjects of normal occlusion(94 males,88 females) and Class Ⅲ malocclusion(75 males,76 females) who had no systemic diseases and no history of orthodontic or prosthodonic treatment.
Fishman's method for the skeletal maturity stages of the hand-wrist and Demirijian's method for the calcification stages of mandibular canines were used and analyzed.
The results were as follows:
1.In subjects with normal occlusion and Class Ⅲ malocclusion,skeletal maturity of the hand-wrist and calcification of mandibular canines at various ages occured earlier in females than males(P<0.05).
2.Comparing the skeletal maturity stages of the hand-wrist and calcification stages of mandibular canines between subjects with normal occlusion and Class Ⅲ malocclusion,there were no significant differences between the groups.
3.The correlation coefficient between the calcification stages of mandibular canines and the skeletal maturity stages of thehand-wrist in subjects with normal occlusion and Class Ⅲ malocclusion showed a high association(P<0.01).
4.In stage 4 of the skeletal maturity of the hand-wrist,the frequency distribution of calcification G stage among the various calcification stages highest both in normal occlusion and in subjects with Class Ⅲ malocclusion.However,there was no signicant differences in the frequency distribution of calcification stage between the groups.