The purpose of this study was to investigate not only the variability in the tiing and amount of the maximum pubertal spurt in cranial base and mandible, but also its interrelationship with the timing of peak height velocity.
This study was carried out by analysing biannual serial lateral cephalometric radiographs of twenty-six males and twenty-one females who were taken from 8.5years to 16.5years old of mean age, according to the established land-marks and linear
measurements.
@ES The results of this study were summarized as follows.
@EN 1. Prevalance of the maximum growth spurt more than 80 percentage was occurred in all measurements of cranial base and mandible, except posterior cranial base length in the female.
2. In all measurements of cranial base and mandible, the maximum spurt was occurred earlier in the female than the male while it was greater in male in all measurements except ramal height.
3. In body height measurement, the peak height velocity was occurred 2 years earlier for the female(11.0 years old) than the male(13.0 years old).
4. The timing of maximum spurt in anterior cranial base length and total mandibular length in both sexes and ramal height I the female were coincided with PHV. The maximum spurt was occurred in both sexes in all measurements 2 years before or
after
PHV, except mandibular body length and posterior cranial base length the in female.
5. In all ages, there was significant correlation between th etotal mandibular length and ramal height, and was also correlation between total cranial base length and anterior cranial base length(P<0.05). However, there was no sigificant
correlation
between the ramal height and mandibular body length. In addition, there was also no any correlation between the anterior cranial base length and posterior cranial base length in all ages(P>0.05).
KOREA J. ORTHOD 1993 ; 23(4) : 529-541.
|