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Changes of symphysis morphology after chincup treatment

Korean Journal of Orthodontics 2000³â 30±Ç 1È£ p.33 ~ 41
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Abstract

kabstract :
¼ºÀå±â ¾Æµ¿¿¡¼­ÀÇ °ñ°Ý¼º ¥²±Þ ºÎÁ¤±³ÇÕÀ» Ä¡·áÇϱâ À§ÇÏ¿© »ç¿ëµÇ´Â À̸ðÀåÄ¡´Â ÇϾǰñ
ÀÇ ÈÄÇϹæ ȸÀü ¶Ç´Â ÇϾǰñ ±æÀÌ ¼ºÀåÀÇ ¾ïÁ¦¿¡ ÀÇÇÏ¿© ÇÏ¾Ç Àüµ¹°¨À» °¨¼Ò½ÃÅ°´Â °ÍÀ¸·Î
¾Ë·ÁÁ® ÀÖ´Ù. ±×·¯³ª ÀÌ¿¡ °üÇÑ ¿¬±¸´Â ÇϾǰñ ¼ºÀåÀÇ ÁÖ¿ä ºÎºÐÀ» ´ã´çÇÏ´Â ÇÏ¾Ç °úµÎºÎÀ§
¿Í °ü·ÃµÈ °ÍÀÌ ´ëºÎºÐÀ̾ú´Ù. º» ¿¬±¸´Â Àå±â°£ À̸ðÀåÄ¡¸¦ Âø¿ëÇÏ¿´À» ¶§ ±¸¿Ü·ÂÀÌ Á÷Á¢
Àû¿ëµÇ´Â ºÎÀ§ÀÎ ÇÏ¾Ç À̺ÎÀÇ ÇüÅ º¯È­¸¦ Æò°¡Çϱâ À§ÇØ ½ÃÇàÇÏ¿´´Ù. ÀüºÏ´ëÇб³ º´¿ø Ä¡
°ú±³Á¤°ú¿¡¼­ ±³Á¤Ä¡·á¸¦ ¹ÞÀº È¥ÇÕÄ¡¿­±â ¾Æµ¿ 62¸í (À̸ðÀåÄ¡ 32¸í, ´ëÁ¶±º 30¸í)À» ´ë»ó
À¸·Î Ãø¸ð µÎºÎ±Ô°Ý ¹æ»ç¼±»çÁøÀ» äµæÇÏ¿©(Ä¡·á ¶Ç´Â °üÂû±â°£ Æò±Õ 2.1³â) °èÃø½Ã (°¢µµ4,
°Å¸® 5°³, ºñÀ² 2°³)¸¦ Æò°¡ÇÏ¿© ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. Ä¡·á ÈÄ symphysis height´Â À̸ðÀåÄ¡¸¦ »ç¿ëÇÏÁö ¾ÊÀº ±º°ú À̸ðÀåÄ¡ Âø¿ë±º¿¡¼­ ¸ðµÎ
Ä¡·á Àüº¸´Ù Áõ°¡ÇÏ¿´´Ù. symphysis depth´Â À̸ðÀåÄ¡¸¦ »ç¿ëÇÏÁö ¾ÈÀº ±º¿¡¼­ Ä¡·á ÈÄ Áõ
°¡ÇÏ¿´À¸³ª À̸ðÀåÄ¡ Âø¿ë±º¿¡¼­´Â Ä¡·á Àü°ú Â÷ÀÌ°¡ ¾ø¾ú´Ù. ƯÈ÷, posterior symphysis
depth°¡ À̸ðÀåÄ¡ Âø¿ë±º°ú ´ëÁ¶±º¿¡¼­ ¸ðµÎ °¨¼ÒÇÑ ¹Ý¸é, anterior symphysis depth´Â ´ë
Á¶±º¿¡¼­´Â Áõ°¡ÇÏ¿´°í À̸ðÀåÄ¡ Âø¿ë±º¿¡¼­´Â Áõ°¡ÇÏ¿´°í À̸ðÀåÄ¡ Âø¿ë±º¿¡¼­´Â Ä¡·á ÈÄ
°¨¼ÒÇÏ´Â °æÇâÀ» º¸¿´´Ù.
2. chin depth¿Í chin curvature´Â À̸ðÀåÄ¡¸¦ »ç¿ëÇÏÁö ¾ÊÀº ±º¿¡¼­´Â Áõ°¡ÇÏ¿´À¸³ª À̸ðÀå
Ä¡ Âø¿ë±º¿¡¼­´Â Ä¡·á ÈÄ¿¡µµ º¯È­¸¦ º¸ÀÌÁö ¾Ê¾Ò°Å³ª °¨¼ÒÇÏ¿´´Ù. ´ëÁ¶±º¿¡¼­ chin angle,
menton angle, symphysis angleÀº °¨¼ÒÇÏ´Â °æÇâÀ» º¸¿´À¸³ª À̸ðÀåÄ¡ Ä¡·á±º¿¡¼­´Â ¿ÀÈ÷
·Á Áõ°¡ÇÏ¿´´Ù. ÀÌ°ÍÀº ÇϾǰñÀÇ ¼ºÀå¿¡ µû¶ó Á¤»óÀûÀ¸·Î ³ªÅ¸³ª´Â pogonion ºÎÀ§ÀÇ °ñħÂø
ÀÌ À̸ðÀåÄ¡ Âø¿ë±º¿¡¼­ chincupÀÇ Á÷Á¢ Á¢ÃË¿¡ ÀÇÇؼ­ ¾ïÁ¦µÈ °á°ú·Î »ý°¢µÈ´Ù.
3. ¼ºÀå±â ¾Æµ¿¿¡¼­ À̸ðÀåÄ¡¸¦ Âø¿ëÇÏ¿´À» ¶§ ÇÏ¾Ç À̺ÎÀÇ Àü¹æ ¼ºÀå ¾ïÁ¦¿¡ ÀÇÇÏ¿© Ä¡·á
Àü°ú À¯»çÇÑ ÇÏ¾Ç À̺ΠÇüÅ°¡ À¯ÁöµÇ¾úÀ¸¸ç ÀÌ°ÍÀº ÁÖ·Î ÇÏ¾Ç À̺ÎÀÇ Àü¹æ¿¡ °ñħÂø ¾ïÁ¦
¿¡ ÀÇÇÑ °á°úÀÎ °ÍÀ¸·Î »ý°¢µÈ´Ù.
#ÃÊ·Ï#
-Abstract-
Although it is well known that the chincup, used to correct a skeletal class ¥²
malocclusion in growing children, reduce the mandibular prognathism by arresting the
growth of the mandibular length and rotating the mandible posteroinferiorly, the majority
of the studies about chincup is focused on condylar head that plays an important role in
mandibular growth.
The aim of this study was to evaluate the morphologic change of the mandibular
symphysis where extraoral force is applied directly during chincup treatment.
The data for this study were obtained from lateral cephalometric radiographs of 62
growing children(chincup group:32, control group:30) with mixed dentition who had been
accepted for the orthodontic treatment at Chonbuk National University Dental Hospital.
The results were as follows :
1. Symphysis height was increased both in chincup therapy group and control group
during treatment. Symphysis depth was decreased or maintained the initial values in
chin cup therapy group, whereas increased in control group. Posterior symphysis depth
was decreased both in chin cup therapy group and control group, but anterior symphysis
depth was increased in control group, whereas decreased in chincup therapy group.
2. Chin depth and chin curvature were increased in control group, whereas maintained
or decreased in chincup therapy group during treatment. Chin angle, menton angle and
symphysis angle were decreased in control group, whereas increased in chincup therapy
group. It suggested that bone deposition in pogonion area that occur normally with
mandibular growth was suppressed by direct contact of chincup.
3. When growing children wear chincup, symphysis morphology was maintained due to
inhibition of forward growth at mandibular symphysis. It may be due to the suppression
of bone deposition in anterior part of symphysis.

Å°¿öµå

À̸ðÀåÄ¡; À̺ÎÇüÅÂ; Chincup; Symphysis morphology;

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