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A CLINICAL STUDY OF CHANGES IN GONIAL ANGLE BETWEEN PRE- AND POST-ORTHOGNATHIC SURGERY IN MANDIBULAR PROGNATHIC PATIENTS

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Abstract

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ÀúÀÚ´Â ÇϾÇÀüµ¹Áõ ȯÀÚ¿¡ À־ ¾Ç±³Á¤¼ö¼ú ÈÄÀÇ ÇϾǰ¢ÀÇ º¯È­¿¡ ´ëÇÑ ¿¬±¸¸¦ À§ÇÏ¿©
1990³âºÎÅÍ 1995³â±îÁö ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ ±¸°­¾Ç¾È¸é¿Ü°ú¿¡ ³»¿øÇÏ¿© ¾Ç±³Á¤¼ö¼úÀ» ¹Þ¾Ò
´ø ȯÀÚÁß¿¡¼­ ÇϾÇÀüµ¹ÁõÀ» ÇؼÒÇϱâ À§Çؼ­ ÇϾÇÁö ½Ã»óºÐÇÒ°ñ Àý´Ü¼ú·Î¸¸ ¼ö¼úÀ» ¹ÞÀº
ȯÀÚÁß¿¡¼­ ¹«ÀÛÀ§·Î ³²ÀÚ 10¸í, ¿©ÀÚ 20¸íµî ÃÑ 30¸íÀ» ¿¬±¸´ë»óÀ¸·Î, ¼úÀü ¹× ¼úÈÄ 6°³¿ù,
±×¸®°í ¼úÈÄ 1³â °æ°úÈÄ µÎºÎ±Ô°ÝÃø¸ð¹æ»ç¼±»çÁøÀ» °èÃøÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ¿©ÀÚ È¯ÀÚÀÇ °æ¿ì, ¾Ç±³Á¤¼ö¼úÈÄÀÇ ÇϾǰ¢ÀÌ 3¸íÀ» Á¦¿ÜÇÏ°í´Â ¼úÀü¿¡ Æò±Õ 128.6¡Æ(¡¾
4.83)¿´´Âµ¥, ¼úÈÄ 6°³¿ù¿£ 123.8¡Æ(¡¾5.49)·Î °¨¼ÒÇÏ¿´À¸¸ç, ¼úÈÄ 1³â¿¡ Æò±Õ 123.4¡Æ(¡¾5.52)
·Î °¨¼ÒÇÏ¿´´Ù(p<0.05).
2. ³²ÀÚ È¯ÀÚ´Â ¾Ç±³Á¤¼ö¼úÈÄ ¼úÀü Æò±Õ ÇϾǰ¢ÀÌ 129.7¡Æ(¡¾6.47)¿´À¸¸ç, ¼úÈÄ 6°³¿ù¿£
125.0¡Æ(¡¾7.28), ¼úÈÄ 1³â¿¡´Â 124.3¡Æ(¡¾7.52)·Î ¸ðµÎ ÇϾǰ¢ÀÌ °¨¼ÒÇÏ¿´´Ù(p<0.05).
3. ¾Ç±³Á¤ ¼ö¼úÈÄ 1³â »çÀÌ¿¡ ÇϾǰ¢ÀÇ Æò±Õ º¯È­·®Àº ³²ÀÚ¿¡¼­ 5.43¡ÆÀÌ°í, ¿©ÀÚ¿¡¼­´Â
55¡Æ·Î ³²³à°£¿¡ À־ Åë°èÀûÀ¸·Î À¯ÀǼºÀÌ ¾ø¾ú´Ù.
4. ÇÏ¾Ç ¿ø½É°ñÆíÀÇ ÈĹæÀ̵¿·®À» ÃøÁ¤ÇÑ °á°ú 6¡­10mmÀÇ setbackÀÌ 15¸í(50%), 11¡­
15mm°¡ 10¸í(33.3%), 1¡­5mm´Â 3¸í(10%), ±×¸®°í 16mmÀÌ»óÀÇ setbackÀº 2¸í(6.6%)À¸·Î
³ªÅ¸³µ´Ù.
#ÃÊ·Ï#
The main goal of the surgical treatment of maxillofacial deformity is improved esthetic
appearance and masticatory function. Recently, the purpose of orthognathic surgery has
been focused on esthetic improvement of the patients. The purpose of this study was to
investigate the changes in gonial angle to orthognathic surgery. For this study 30
patients were randomly selected. All patients with mandibular prognathism were
operated upon with bilateral sagittal split ramus osteotomy and mandibular setback. The
patients were cephalmetric lateral radiographs for 1 hear. Lateral cephalmetric
radiographs taken preoperatively, over 6-months and 1 year follow up were traced and
analysed.
The following conclusions were reached. :
1. During following up period for 1 year, the change of gonial angle after orthognathic
surgery was decreased, except 3 cases. The mean gonial angle change was decreased
from 128.6¡Æ(¡¾4.83) to 123.4¡Æ(¡¾5.52) in female(p<0.05).
2. During follow up period for 1 year, the mean gonial angle was decreased after
orthognathic surgery from 129.7¡Æ(¡¾6.47) to 123.3¡Æ(¡¾7.52), in all male patients(p<0.05).
3. The mean gonial angle changes after orthognathic surgery was about 5.2¡Æin female
and 5.4¡Æin male. There was less statistical significance between male and female.
4. The ratio of mandibular setback amount from 6mm to 15mm was 83.3%, and from
1mm to 5mm was 10%.

Å°¿öµå

Mn. prognathism; Gonial angle; Sagittal split ramus osteotomy;

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