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KMID : 0361919900200010123
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Korean Journal of Orthodontics
1990 Volume.20 No. 1 p.123 ~ p.133
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A STUDY OF THE CALCIFICATION OF THE SECOND AND THE THIRD MOLARS IN SKELETAL CAASS Ⅱ AND Ⅲ MALOCCLUSIONS
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Abstract
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The work was undertaken to evaluate the calcification of the second and the third molars in skeletal Class 11 and III malocclusions. The differences in the calcification stages between skeletal Class iI and III malocclusion were evaluated and statistically analysed from panoramic radiographs of 202 males and` females ranging in age from i 1 to 15 years old.
The results. were as follows,
I . The calcification stages of the second and the third molars were not different between the
skeletal Class II and III malocclusions in each age groups of both sexes.
2. The calcification stages of lower second and-third molars of the skeletal Class III malocclusion
are more advanced than those of the skeletal Class iI malocclusion in male.
3. The clacification stages of upper second and third molars are more advanced than those of
lower second and third molars in skeletal Class II malocclusion.
4. The calcification stages of lower second and third molars are more advanced than those
of upper second and third molars in skeletal Class III malocclusion.
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KEYWORD
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