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A Study on the 3-D standard value of mandible for the diagnosis of facial asymmetry

Korean Journal of Orthodontics 2005³â 35±Ç 2È£ p.91 ~ 105
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Abstract

±âÁ¸ÀÇ 2Â÷¿øÀû Áø´ÜÀÚ·á´Â »óÀÇ È®´ë ¹× ¿Ö°îÀ¸·Î ÀÎÇØ Çüųª Å©±âÀÇ Á¤·®Àû Æò°¡½ÃºÎÀûÀýÇÑ °á°ú¸¦ ¾ß±âÇÒ ¼ö ÀÖ¾î ¾È¸éºñ´ëĪÀÇ Á¤È®ÇÑ Áø´Ü°ú Ä¡·á°èȹ ¼ö¸³À» À§Çؼ­´Â 3Â÷¿ø¿µ»ó Áø´ÜÀÇ µµÀÔÀÌ ÇÊ¿äÇÏ´Ù.
º» ¿¬±¸´Â ¾È¸éºñ´ëĪ Áø´Ü½Ã 3Â÷¿øÀû ºÐ¼®¿¡ µµ¿òÀÌ µÇ´Â ±âÁØÀڷḦ ¾ò°íÀÚ Á¤»ó±³ÇÕÀÚ¸¦ ´ë»óÀ¸·Î ÇϾǰñ 3Â÷¿ø¿µ»ó °èÃøÇ׸ñÀÇ Æò±Õ°ª°ú Á¿ìÂ÷ÀÌÀÇ Á¤»ó¹üÁÖ¸¦ ¾Ë¾Æº¸±â À§ÇÏ¿© ½ÃÇàµÇ¾ú´Ù.
¶Ñ·ÇÇÑ ¾È¸éºñ´ëĪÀ» º¸ÀÌÁö ¾Ê´Â ¼ºÀÎ Á¤»ó±³ÇÕÀÚ ³²³à 30¸í¾¿ ÃÑ60¸íÀ» ´ë»óÀ¸·Î µÎ°æºÎ Àü´ÜÈ­´ÜÃþ»çÁøÀ» ÃÔ¿µÇÑ ÈÄ ÄÄÇ»ÅÍ ÇÁ·Î±×·¥À» ÀÌ¿ëÇÑ °¢°¢ÀÇ ´Ü¸é ÃÔ¿µ¿µ»ó Á¤º¸¸¦ ÀÌ¿ëÇÏ¿© 3Â÷¿ø ÀÔü¿µ»óÀ» À籸¼ºÇÑ ´ÙÀ½, ÇϾà°ñ ºñ´ëĪ½Ã Á¿ìÂ÷À̸¦ º¸ÀÏ ¼öÀÖ´Â °èÃþÇ׸ñ ramus length¸¦ ³ªÅ¸³»´Â 6°³ condyla neck length¸¦ ³ªÅ¸³»´Â 1°³,
mandibular body length¸¦ ³ªÅ¸³»´Â 8°³ µî 15°³ÀÇ °Å¸® °èÃþÇ׸ñ°ú gonial angleÀ»
³ªÅ¸³»´Â 4°³, frontal ramal inclinationÀ» ³ªÅ¸³»´Â 2°³, lateral ramal
inclinationÀ» ³ªÅ¸³»´Â 2°³ µî 8°³ÀÇ °¢µµ°èÃþÇ׸ñ.
ÃÑ 23°³ÀÇ °èÃþÇ׸ñÀ» ¼³Á¤ÇÑ ÈÄ, ÁÂÃø°ú ¿ìÃøÀ» ±¸ºÐÇÏ¿© ÄÄÇ»ÅÍ »ó¿¡¼­ 3Â÷¿ø°èÃøÄ¡¸¦ ±¸ÇÏ°í Á¿ìÂ÷ÀÌ°ªÀ» »êÃâÇÏ¿´´Ù. º» ¿¬±¸°á°ú ¾ò¾îÁø Á¤»ó±³ÇÕÀÚÀÇ ÇϾǰñ 3Â÷¿ø¿µ»ó °èÃþÇ׸ñÀÇ Á¿ìÂ÷ÀÌ°ªÀº ¾È¸éºñ´ëĪ ȯÀÚÀÇ Áø´Ü ±âÁØÄ¡·Î À¯¿ëÇÏ°Ô »ç¿ëµÉ ¼ö ÀÖÀ» °ÍÀÌ´Ù.

For an accurate dlagnosis and treatment planning of facial asymmetry, the use of
3-dimensional(3-D) image is indispensable. The purpose of this study was to get
standard data for the 3-D analysis of facial asymmetry.Computerized
tomography(CT) was taken in the 60 normal occlusion individuals (30 male, 30
female) who did not have any apparent facial asymmetry.
The acquired 2D CT DICOM data were input on a computer, and the reformatted 3-D
images were created using a 3-Dimage software. Twenty three measurements were
established in order to evaluate asymmetry:15linear measurements (6 for ramus
length, 1 for condylar neck length, and 8 for mandibular body length) and 8
angular measurements (4 for gonial angle, 2 for frontal ramal inclination, and 2
for lateral ramal inclination).
The right and left difference of each measurement was calculated and analyzed.
Itis suggested that the right and left differences of the measurements obtained
from the study could be used as references for the diagnosis of facial
asymmetric patients.

Å°¿öµå

¾È¸éºñ´ëĪ;ÇϾǰñ 3Â÷¿ø¿µ»ó;°èÃø±âÁØÄ¡;Facial asymmetry;3-D CT image;3-D standard value

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