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THE STUDY OF THE ERUPTION PATTERN OF THE MAXILLARY FIRST PERMANENT MOLAR
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Â÷¹®È£(ó³Ùþûß)/Hyun Kyu Kim
±èÇö±Ô(ÐÝúéФ)/Cha Moon Ho
KMID : 0358919840110010013
Abstract
Ì¿ÒÕ
ß¾äÉ ð¯ìéÓÞÏ¿öÍÀÇ ØðõóΦïïÀ» κóÌÇϱâ êÓÇÏ¿© 3ᨺÎÅÍ 7ᨱîÁöÀÇ ä®ãøÀ» ÓßßÚÀ¸·Î 266
çÓÀÇ ö°ÙÉÔéÝ»XàÊЮ̫ÞÐòØÀ» ÷ìç¯ÇÏ°í ß¾äÉ ð¯ ìéÓÞÏ¿öÍÀÇ öÍήõîÀÇ ÌËÞØÊÇÓø¿Í á÷òÁÛ°ú¾
ÀÇ êÈöÇîÜ Ëå×îܨûù¸¦ ðàÞÛÇÏ¿© ´ÙÀ½°ú °°Àº Ì¿ÒÕÀ» ¾ò¾ú´Ù.
1. ß¾äÉ ð¯ìé÷¼Ï¿öÍÀÇ äÑì¼øÁØü(F.H.Plane)¿¡ ÓßÇÑ öÍήõîÀÇ ÌËÞØÊÇÓø´Â Ñûåü ÍìÈ÷ 3ᨿ¡
¼ºÎÅÍ 5ᨱîÁö´Â ñòÊ¥ÇÏ´Ù°¡ 6ᨿ¡¼ å´éÍÊõá´ÇßÀ¸³ª 7ᨿ¡¼ ´Ù½Ã ñòÊ¥ÇÏ¿´´Ù.
2. ß¾äÉ ð¯ìéÓÞÏ¿öÍÀÇ á÷òÁÛ°ú¾ÀÇ êÈöÇîÜܨûù´Â Ñûåü ÍìÈ÷ 3ᨿ¡¼ºÎÅÍ 5ᨱîÁö´Â ÎáùêøÁ
ØüÀ» ú¾ÇÏ¿© ßïßïÈ÷ ØðõóÇÏ´Ù°¡ 5ᨿ¡¼ºÎÅÍ ÐáÌÇÑ áÜÓø·Î ØðõóÀÌ òäú¼µÇ¾ú´Ù.
3. ß¾äÉ ð¯ìéÓÞÏ¿öÍÀÇ ÐÎêÀãýúúö°ÎáÔéôÓÓ®ÀÇ ÎáùêøÁØü¿¡ ÓßÇÑ á÷òÁîÜܨûù´Â Ñûåü ÍìÈ÷ êÀ
ãý ÎáÔéôÓÓ®ÀÇ ì¹ÔÑËå×î°¡ ÐÎãýÎáÔéôÓÓ®ÀÇ ì¹ÔÑËå×´Ù ÄÇ´Ù.
4. ß¾äÉ ð¯ìéÓÞÏ¿öÍÀÇ á÷òÁÛ°ú¾ÀÇ êÈöÇîÜ Ü¨ûù¿¡¼ ÓÞô÷îÜÀ¸·Î Ñû䮿¡¼º¸´Ù åü䮿¡¼ Øð
õóáÜÓø°¡ »¡¶ú´Ù.
#ÃÊ·Ï#
To Study the eruption pattern of the maxillary first permanent molar, the author took
266 cases of true lateral cephalogram (Male; 137 cases, Female; 129 cases) from 3 to 7
years old children and observed the vertical change and axial change.
The following results were obtained:
1. The angle of axial inclination of the maxillary first permanent molar to the F-H
plane increased gradually from age 3 to 7, except for age 6 in both sexes.
There was a slight reversal of this motion at age 6.
2. The distance from the cusp of the maxillary first permanent molar to the occlusal
plane slightly decreased from age 3 to 5, and rapidly decreased from age 5 in both
sexes.
3. The change of angle of the axial inclination resulted in the distance from the
distobuccal cusp of the maxillary first permanent molar to the occlusal plane decreasing
more than that from the mesiobuccal cusp of the maxillary first permanent molar to the
occlusal plane in both sexes.
4. The eruption of the maxillary first permanent molar generally was found to be
earlier in girls than boys.
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