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A STUDY ON THE POSITION OF CONDYLAR HEAD ON COMPUTED TOMOGRAM

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Abstract

Á¤»óÀÎ 10¸í°ú °üÀýÀâÀ½À» °®°í Àְųª °³±¸Á¦ÇÑÀÌ Àִ ȯÀÚ 5¸í¿¡ ´ëÇÏ¿© Hitachi-W
500À» ÀÌ¿ëÇÏ¿© ¾Ç°üÀýÀ» Áß½ÉÀ¸·Î ±³ÇÕÀ§¿Í 18§® °³±¸»óÅ¿¡¼­ Ãà¸é ÁÖ»çÇÑ ÈÄ bone
algorithmÀ¸·Î ¼öÆò¸é»ó ºÐ¼®À» ÇàÇÏ°í, ½Ã»ó¸é»óÀçÇü¼ºÀ» ÇàÇÏ¿© Á᫐ ±³ÇÕÀ§¿Í 18§® °³±¸
»óÅÂÀÇ °úµÎ¸¦ ³»Ãø 1/3, Áß½ÉÃø, ¿ÜÃø 1/3ÀÇ ´Ü¸é¿¡¼­ ÈÄ°üÀý °ø±ØÀÇ °Å¸®¸¦ computer¸¦ ÀÌ
¿ëÇÏ¿© °èÃøÇÏ¿´´Ù. À̾î transcranial view¿Í submentovertex view¸¦ ÃÔ¿µÇÏ¿© ºñ±³ÇÑ ÈÄ
´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. Á¤»ó±º¿¡¼­ Á᫐ ±³ÇÕÀ§¿¡¼­ÀÇ °úµÎÀåÃàÀÇ °¢Àº Æò±Õ 17¡Æ¿´°í, 18§® °³±¸À§¿¡¼­´Â °¢
ÀÌ ÁÂ¿ì µ¿ÀÏÇÏ°Ô °¨¼ÒÇÏ¿´À¸³ª, ȯÀÚ±º¿¡¼­´Â 18§® °³±¸½Ã ÀÌȯÃø¿¡¼­ ´õ Å« °¨¼ÒÄ¡¸¦ ³ª
Ÿ³Â´Ù.
2. ȯÀÚ±º¿¡¼­ Á᫐ ±³ÇÕÀ§ ¹× 18§® °³±¸À§¿¡¼­ ÀÌȯÃøÀÇ °úµÎ°¡ ¹Ý´ëÆíº¸´Ù »ó¹æ¿¡ À§Ä¡
ÇßÀ¸¸ç ±× ³ôÀÌÀÇ ÆíÀ§´Â 18§® °³±¸À§½Ã ´õ¿í Ä¿Á³´Ù.
3. °úµÎÀÇ ³»Ãø±ØÀ¸·ÎºÎÅÍ ÃøµÎ°ñ »ï°¢¿Í±îÁöÀÇ °Å¸®´Â Á¤»ó±º¿¡¼­ ÁÂ¿ì ´ëĪÀ̾úÀ¸³ª, ȯ
ÀÚ±º¿¡¼­´Â ÀÌȯÃøÀÌ Á¤»óÃøº¸´Ù ³Ð¾ú°í, 18§® °³±¸À§½Ã´Â ÀÌȯÃøÀÌ Á¼¾ÆÁ³´Ù.
4. ÈÄ°üÀý °ø±ØÀÇ °Å¸®´Â Á¤»ó±º¿¡¼­ ´ëĪÀ̾ú°í, Á᫐ ±³ÇÕÀ§½Ã transcranial viewÀÇ ¼öÄ¡
¿ÜÃø 1/3ºÎ °Å¸®¿Í À¯»çÇß´Ù.
5. ÈÄ°üÀý °ø±ØÀÇ °Å¸®´Â ȯÀÚ±º¿¡¼­ ÀÌȯÃøÀÌ Á¤»óÃøº¸´Ù Á¼¾Ò´Ù.
6. ÃÑ°ýÀûÀ¸·Î ȯÀÚ±º¿¡¼­´Â Á᫐ ±³ÇÕÀ§¿¡¼­ ÀÌȯÃø °úµÎ°¡ ÈÄ¿Ü»ó¹æÀ¸·Î ÀüÀ§ µÇ¾úÀ¸¸ç,
18§® °³±¸À§¿¡¼­ ÀÌȯÃøÀÇ °úµÎ°¡ Á¤»óÃø º¸´Ù Å©°Ô ȸÀüµÇ¾ú´Ù.
#ÃÊ·Ï#
The author obtained the computed tomograms around the condylar head from 10
normal subjects and 5 patients having clicking condylar head from 10 normal subjects
and 5 patients having clicking sound or limitation of mouth opening by using a
Hitachi-W 500. And then, the author had the axial analysis of condyle position and
sagittal analysis of that after sagittal reformation on centric occlusion and 18 §®
interincisal opening. Transcranial view and submentovertex view were taken and
compared with computed tomographic view
The obtained results were as follows:
1. Median angle of long axis of condylar head was 17 degrees on centric occlusion
and the angles of long axis of both condylar heads were reduced symmetrically on
18mm interincisal opening in normal group, however, in the patient group, the affected
side of condyle heads showed greater change in the angle on 18 §® interincisal opening.
2. In the patient group, the condyle head of affected side was located superiorly to
that of normal side on centric occlusion and the discrepancy of condular positional
height was increased after 18 §® interincisal opening.
3. The distances from medial pole of condylar head to triangular fossa of temporal
bone were same on both right and left side in normal group, however, in the patient
group, the distance of affected side was wider than that of opposite side on centric
occusion and became narrower than the opposite side on 18mm interincisal opening.
4. The distances of posterior joint space were same on both right and left side. The
distance at lateral pole 1/3 of condyle head was similar to that on transcranial view on
centric occlusion in normal group.
5. The distances of posterior joint space were narrower in patient group than in
normal group.
6. Conclusively, the affected condylar head of patient showed postero-latero-superior
displacement on centric occlusion and larger range of rotational movement on 18mm
interincisal opening.

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