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A STUDY ON THE RANGE OF MANDIBULAR MOVEMENT OF NORMAL AND CLASS ¥² MALOCCLUSION CHILDREN

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Abstract

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Áø ³²³à¾Æµ¿ 80¸íÀ» ´ë»óÀ¸·Î ÇÏ¾Ç ÀüÄ¡ºÎ¿¡¼­ ÇϾǿ¹üÀ§¸¦ ÀüµÎ¸é ½Ã»ó¸é ¼öÆò¸é»ó¿¡¼­
¿¬±¸ÇÏ¿© 13¼¼ÀÇ ÇϾǿ¹üÀ§¿Í ±³ÇÕ À¯Çü¿¡ µû¸¥ ÇϾǿ¹üÀ§ÀÇ Â÷À̸¦ Á¶»çÇÏ¿© ´ÙÀ½°ú
°°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. ÀüµÎ¸é»ó¿¡¼­ Ãø¹æ¿îµ¿°Å¸®´Â ¿ìÃøÀº Á¤»ó±º ³²¾Æ 11.96§®, ¿©¾Æ 11.10§®, ¥²±Þ±º¿¡¼­
³²¾Æ 11.32§®, ¿©¾Æ 11.24§®,ÁÂÃø¿¡¼­´Â Á¤»ó±º¿¡¼­ ³²¾Æ 11.48§®, ¿©¾Æ 11.0§®, ¥²±Þ±º¿¡¼­´Â
³²¾Æ 10.91§®, ¿©¾Æ 10.44§® ¿´´Ù.
°³±¸¸éÀûÀº Á¤»ó±º ³²¾Æ 7.16cm2, ¿©¾Æ 6.59cm2, ¥²±Þ±º¿¡¼­
´Â ³²¾Æ 7.29cm2, ¿©¾Æ 7.50cm2¿´´Ù.
2. ½Ã»ó¸é¿¡¼­ Àü¹æ¿îµ¿°Å¸®´Â Á¤»ó±º ³²¾Æ 11.70§®, ¿©¾Æ 11.40§®, ¥²±Þ±º ³²¾Æ 10.87§® ¿©
¾Æ 11.02§® ¿´´Ù.
ÈĹ汳ÇÕÀ§±îÁö °Å¸®´Â Á¤»ó±º ³²¾Æ 1.43§®, ¿©¾Æ 1.31§®, ¥²±Þ±º ³²¾Æ 1.86§®, ¿©¾Æ 1.62§®
¿´´Ù.
3. ¼öÆò¸é¿¡¼­ Àü¹æ¿îµ¿°Å¸®´Â Á¤»ó±º ³²¾Æ 10.20§® ¿©¾Æ 10.00§®, ¥²±Þ±º ³²¾Æ 9.12§®, ¿©
¾Æ 9,36§®¿´´Ù.
4. ¥²±ÞºÎÁ¤±³ÇÕ±º¿¡¼­ Á¤»ó±³ÇÕ±ºº¸´Ù Àü¹æ¿îµ¿¹üÀ§°¡ ´õ ÀÛ¾Ò´Ù.
5. 13¼¼ ¾Æµ¿¿¡¼­ ÇϾǿ¹üÀ§ÀÇ ³²³à°£ÀÇ Â÷ÀÌ´Â ¾ø¾ú´Ù.
#ÃÊ·Ï#
The purpose of this study is to obtain, the normal range of mandibular movement for
13 year old boys and girls, and to compare it to the range of mandibular movement of
class ¥² patient and normal adult for diagnosis and prognosis of class ¥² malocclusion
and TMJ dysfunction.
The subjects were 20 normal boys 20 normal girls 22 class ¥² boys and 18 class ¥²
girls.
The author measured the ranges and shapes of movement of the mandible in the
frontal, sagittal and horizontal trajectories using Saphon visi-trainer C¥± (Tokyo
Shizaisha Inc.) for the subjects.
The results obtained are as follows:
1) The mesa for maximum right laterotrusion in the frontal trajectory were 11.96§® in
N.B., 11.10§® in N.G., 11.32§® in ¥². B., 11.24§® in ¥² G. The mean for maximum left
laterotrusion were 11.48§®, 11.0§®, 10.91§®, 10.44§® respectively.
Area of border movement were 7.16§¯ in N.B., 6.59§¯ in N.G., 7.29§¯ in ¥². B., 7.50§¯
in ¥².G.
2) The mean for maximum protrusion in the sagittal trajectory were 11.7§® in N.S.,
11.4§® in N.G., 11.87§® in ¥² B., and 11.02§® in ¥². G.
3) The mean for maximum protrusion in the horizontal trajectory were 10.20§® in
N.B., 10.00§® in N.G., 9.12§® for ¥². B. and 9.36§® in ¥². G.
4) The mean for maximum protrusion of Class ¥² subjects were shorter than those of
normal subjects.
5) There was no sexual difference in the range of mandibular movement for 13 year
old subjects.

Å°¿öµå

N.B.; Normal boys; N.G.; Normal girls; ¥².B.; Class boys; ¥².G.; Class ¥² girls;

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