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A CEPHALOMETIC STUDY OF THE DEVELOPMENTAL RELATIONSHIP BETWEEN PRIMARY AND PERMANENT MAXILLARY CENTRAL INCISOR TEETH

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Abstract

îÊíº´Â 4ᨿ¡¼­ 7á¨ÀÇ ä®ÔÛÀ¸·Î¼­ îñöÍÝ»¿¡ öÍä³ ãÚñø, ÞªïáßÈîÜÀÎ ã§Î± ¹× ýâáßöÍ°¡ ¾ø
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Ì«ÞÐòÁÀ» ××éÄÇÏ¿© ß¾äÉêáñéï·öÍ¿Í çµÎùñéï·öÍÀÇ ßÓû»Û¡ëÀμÌõ¿¡ ÓßÇÑ æÚϼ̿Íý ´ÙÀ½°ú °°
Àº Ì¿ÒÕÀ» ¾ò¾ú´Ù.
1. ß¾äÉñéï·öÍ íþõîÀÇ ÌËÞØÓø ܨûù´Â ÝïÎòîÜ äÌïҵǾî ÀÖÀ¸¸ç 7ᨿ¡¼­ òÆØüÀ¸·Î ÌËÞصǴÂ
ïïÓø°¡ ¶Ñ·ÇÇÏ¿´´Ù.
2. êáöÍÐÆ°ú çµÎùöÍή°üÀÇ Ëå×î´Â 2mmì¤Ò®·Î ä¤ÇÑ Ü¨ûù´Â ¾ø¾ú´Ù.
3. ß¾äÉñéï·öÍÀÇ â©øÁ ¹× á÷òÁÛ°ú¾ à÷íþÀÇ ó¬×ä´Â 4¡­5ᨠ5¡­6ᨿ¡¼­´Â ÐÁá´ÇÏ¿´°í 6¡­7á¨
¿¡¼­´Â â©øÁÛ°ú¾º¸´Ù á÷òÁÛ°ú¾ÀÇ à÷íþÀÌ úéîÊÇÏ¿´´Ù.
4. öÍä³íþõîÀÇ ÌËÞØÓøܨûù¿Í â©øÁ ¹× â©òÁÛ°ú¾ à÷íþÀÇ Ü¨ûù¿¡¼­ ÑûåüÊàÀÇ àõܬó¬´Â °ÅÀÇ
ìãïÒÇÒ ¼ö ¾ø¾ú´Ù.
#ÃÊ·Ï#
The purpose of this study is to determine the developmental relationship between the
maxillary primary central incisors and their permanent successor. The author took 315
cases of lateral cephalogram of the children (males were 171, females were 141)
Angular change of the teeth and horizontal and vertical linear change were observed.
The obtained results were as follows :
1. The inclination of the long azes of both incisor teeth was relatively stable and
labio-version of both incisore was significant at 7 years of age.
2. The distance between the incisal edge of the permanent central insisor and the
resorbing apers of the primary maxillary central incisor remained within 2mm of each
other.
3. Vertical growth of the maxillary anterior portion was greater than horizontal growth
from 6 to 7 years of age.
4. There was not a significant sexual difference.

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