The purpose of this study was to investigate the ossification patterns of cervical vertebras m association with bone maturities of hand-wrist and determine the possibility whether these usesments can be used for evaluation of craniofacial skeletal growth.
The subjects, consisted of 142 males and 133 females aged from 8 to 17years with normal Occlusion and general health, were divided into 6 stages by the skeletal maturation of hand-*rist on hand-wrist radiographs.
In cephalogram, the concavity of inferior border, height difference between anterior jWd
posterior border, and vertico -horizontal ratio of cervical vertebras were measured.
The measurements were analyzed statistically by SAS (Statistical Analysis of Scien4e) computerized program.
The results were as follows :
1. The skeletal maturation occurred earlyer in female than in male, and mean chronologic age at the skeletal maturation stage 4 (the time of mazimum growth period) was 14 years in male, 12.4 years in female and showed greatest age difference(P(0.05).
2. The concavity of inferior border and the vertico -horizontal ratio of cervical vertebrae were increased according to skeletal maturation of hand and wrist(P<0.05), and the height difference between anterior and posterior border was decreased but not showed significance.
3. Correlation coefficient between the skeletal maturation of hand-wrist and the concavity of inferior border, the vertico -horizontal ratio of cervical vertebrae were 0.7039~0.7918 and 0.7093~0.7918, thereby showed close correlation in each order(P<0.05), but little correlation was shoved between height difference of cervical vertebrae and skeletal maturation of hand-wrist(r=0.1623~0.3226).
4. The concavity of inferior border and the vertico -horizontal ratio of each cervical vertebrae were decreased signicantly(P<0.05) with descending, but the height difference between anterior and posterior border did not show any significant difference among different vertebras.
5. The assesments of the concavity of inferior border and the vertico -horizontal ratio of cervical vertebrae on cephalogram showed possibility to use for evaluation of craniofacial skeletal growth.
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