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The study on the changes of the masticatory muscle activity and the occlusal contact points before and after orthodontic treatment of the class ¥² malocclusion patients

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Abstract

°á·Ð
ÀúÀÚ´Â ¼­¿ï´ëÇб³º´¿ø Ä¡°úÁø·áºÎ ¼Ò¾ÆÄ¡°ú¿¡ ÇÏ¾Ç Àüµ¹À» ÁÖ¼Ò·Î ³»¿øÇÑ ¾Æµ¿ Áß FR-¥²
ÀûÀÀÁõÀΠȯ¾ÆÀÇ ±³Á¤Ä¡·á ÀüÈÄ¿Í Á¤»ó±³ÇÕ ¾Æµ¿ÀÇ ÀúÀÛ±Ù ±ÙÈ°¼ºµµ ¹× ±³ÇÕ Á¢ÃËÁ¡ ÀÇ °¹
¼ö¸¦ Bioelectric Processor EM2¿Í T-Scan systemÀ» ÀÌ¿ëÇÏ¿© ÃøÁ¤ ´ÙÀ½°ú °°Àº °á·ÐÀ»
¾ò¾ú´Ù.
1, Á¤»ó±º°ú ¥²±Þ ºÎÁ¤±³ÇÕ È¯ÀÚ±ºÀÇ ÀúÀÛ±Ù ÃÖ´ë ¼öÃà½Ã ÀüÃøµÎ±ÙÀÇ ±ÙÈ°¼ºµµ´Â µÎ ±º °£
¿¡ À¯ÀÇÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾ÒÀ¸³ª ±³±ÙÀÇ ±ÙÈ°¼ºµµ´Â Á¤»ó±º¿¡¼­ ³ô°Ô ³ªÅ¸³µ´Ù(P<0.05).
2. ¥²±Þ ºÎÁ¤±³ÇÕ È¯ÀÚ±º¿¡¼­ ÀüÃøµÎ±Ù°ú ±³±ÙÀÇ È°¼ºµµ Â÷ÀÌ´Â ¾ø¾úÀ¸³ª Á¤»ó±º¿¡¼­ ±³±Ù
ÀÇ È°¼ºµµ°¡ ÀüÃøµÎ±ÙÀÇ È°¼ºµµ¿¡ ºñÇØ ³ô°Ô ³ªÅ¸³µ´Ù(P<0.01).
3. Á¤»ó±º°ú ¥²±Þ ºÎÁ¤±³ÇÕ È¯ÀÚ±º¿¡¼­ ÀüÃøµÎ±Ù°ú ±³±ÙÀÇ Á¿ìÃø È°¼ºµµ Â÷ÀÌ´Â ¾ø¾ú´Ù.
4. Á¤»ó±ºÀÇ ±³ÇÕ Á¢ÃËÁ¡ÀÇ °¹¼ö°¡ ¥²±Þ ºÎÁ¤±³ÇÕ È¯ÀÚ±ºÀÇ ±³ÇÕ Á¢ÃËÁ¡ÀÇ °¹¼öº¸´Ù ¸¹¾Ò´Ù
(P<0.005).
5. ¥²±Þ ºÎÁ¤±³ÇÕ È¯ÀÚ±ºÀÇ ÀüÃøµÎ±Ù°ú ±³±ÙÀÇ È°¼ºµµ´Â Ä¡·á Àü¿¡ ºñÇØ Ä¡·áÁ÷ÈÄ¿¡ µÎ±Ù¿¡
¼­ ¸ðµÎ °¨¼ÒÇÏ¿´À¸¸ç ÀüÃøµÎ±Ù¿¡¼­ ´õ ¸¹Àº °¨¼Ò¸¦ º¸¿´´Ù(ÀüÃøµÎ±Ù : p<0.005, ±³±Ù :
P<0.05).
6. ¥²±Þ ºÎÁ¤±³ÇÕ È¯ÀÚ±ºÀÇ Á¢ÃËÁ¡ÀÇ °¹¼ö´Â Ä¡·á Àü¿¡ ºñÇØ Ä¡·á ÈÄ¿¡ ´õ Àû¾úÀ¸³ª Åë°èÀû
À¸·Î À¯ÀÇÇÑ Â÷ÀÌ´Â º¸ÀÌÁö ¾Ê¾Ò´Ù(P=0.059).
#ÃÊ·Ï#
The purpose of the present study was to compare the changes in the maximal
contraction of the masticatory muscles and the occlusal contact points before and after
the orthodontic treatment of the class H malocclusion children. The subjects were
consisted of 21 children with class ¥² malocclusion, 17 normal occlusion children and 13
treated children. The class ¥² malocclusion children were treated with FR-¥². The EMG
signal from the masseter and the anterior temporal muscle group was recorded by the
Bioelectric Processor EM2, and the occlusal contact point was evaluated by the T-Scan
system. The following results were obtained :
1. In the anterior temporal muscle activity, there was no significant difference between
the normal occlusion children and the class ¥² malocclusion children, but the masseter
muscle activity of the normal occlusion children was higher than that of the class 111
malocclusion group(P<0.05).
2. There was no significant difference in the both muscle activity, but in the normal
occlusion group, the activity of the masseter muscle was higher than that of the
anterior temporal muscle(P<0.01).
3. In the both muscle group, there was no significant difference between the right and
left side.
4. In the occlusal contact point, the normal occlusion group was more recored than the
class U malocclusion group(P<0.005).
5. After treatment the muscle activity in the both muscle group was significantly
reduced, and the anterior temporal muscle showed greater decreasing than the masseter
muscle(Ant. temporal muscle : P<0.005, Masseter muscle : P<0.05).
6. After treatment the occlusal contact point was decreased, but not statistical difference
level (P=0.059).

maximal contraction; occlusal contact points, class ¥² malocclusion; FR-¥² Bioelectric Processor EM2; T-Scan system; EMG signal.;

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