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Cone-beam CT¸¦ ÀÌ¿ëÇÑ °ñ°Ý¼º III±Þ ºÎÁ¤±³ÇÕÀÚÀÇ ÇϾǰñ ÈÄÅð¼ú ÈÄ »ó±âµµ º¯È­¿¡ °üÇÑ ¿¬±¸

Three dimensional cone-beam CT study of upper airway change after mandibular setback surgery for skeletal Class III malocclusion patients

Korean Journal of Orthodontics 2010³â 40±Ç 3È£ p.145 ~ 155
±è³ª¸®, ¹Ú¼öº´, ±è¿ëÀÏ, Ȳ´ë¼®,
¼Ò¼Ó »ó¼¼Á¤º¸
±è³ª¸® ( Kim Na-Ri ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ±³Á¤Çб³½Ç
¹Ú¼öº´ ( Park Soo-Byung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°ú±³Á¤Çб³½Ç
±è¿ëÀÏ ( Kim Yong-Il ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ±³Á¤Çб³½Ç
Ȳ´ë¼® ( Hwang Dae-Seok ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ±¸°­¾Ç¾È¸é¿Ü°úÇб³½Ç

Abstract

¾Ç±³Á¤ ¼ö¼úÀº ¾È¸é°ñ°ÝÇüÅ »Ó¸¸ ¾Æ´Ï¶ó »ó±âµµ °ø°£¿¡µµ ¿µÇâÀ» ÁØ´Ù. º» ¿¬±¸´Â °ñ°Ý¼º III±Þ ºÎÁ¤±³ÇÕÀÚ Áß ÇϾǰñ ÈÄÅð¼úÀ» ½ÃÇà ¹ÞÀº ȯÀÚ¸¦ ´ë»óÀ¸·Î »ó±âµµ °ø°£ÀÇ ºÎÇǺ¯È­¸¦ °üÂûÇϱâ À§ÇÏ¿© ½ÃÇàµÇ¾ú´Ù. ±âÁ¸ÀÇ ¿¬±¸µéÀÌ Ãø¸ðµÎºÎ¹æ»ç¼±»çÁøÀ» Áß½ÉÀ¸·Î ½ÃÇàÇÏ¿´À¸³ª º» ¿¬±¸¿¡¼­´Â 3Â÷¿ø cone-beam computed tomography (CBCT)¸¦ ÀÌ¿ëÇÏ¿© ¿µ»óÀ» À籸¼ºÇÑ µÚ ºÐ¼®ÇÏ¿´´Ù. ¿¬±¸ ´ë»óÀº ÇϾǰñ ÈÄÅð¼úÀ» ½ÃÇà ¹ÞÀº 20¸í(³²¼º 12, ¿©¼º 8)À̾úÀ¸¸ç, ¼ö¼ú Àü Æò±Õ 1.8ÁÖ(Baseline), ¼ú ÈÄ Æò±Õ 2.3°³¿ù(T1) ±×¸®°í ¼ú ÈÄ Æò±Õ 1³â(T2) ½Ã±â¿¡ CBCT¸¦ ÃÔ¿µÇÏ¿´´Ù. »ó±âµµ°ø°£Àº ±âÁØÆò¸é¿¡ µû¶ó ºñÀεÎ, ±¸ÀεÎ, ÇÏÀεηΠ³ª´©¾î °èÃøÇÏ°í Baseline, T1, T2¸¦ °¢°¢ ºñ±³ÇÏ¿´´Ù. °á°ú·Î ¼ö¼ú ÈÄ 2.3°³¿ù(T1)½Ã±â¿¡ »ó±âµµ °ø°£Àº »ó´çÈ÷ °¨¼ÒÇÏ¿´À¸¸ç (p £¼ 0.001), ¼ú ÈÄ 1³â ÈÄ(T2)¿¡µµ °¨¼ÒµÈ ¾çÀº Áõ°¡ÇÏÁö ¾Ê¾Ò´Ù. ±¸Àεδ »ó±âµµ °ø°£ Áß °¡Àå ¸¹Àº °¨¼ÒÆøÀ» º¸¿´´Ù. ÀÌ·¯ÇÑ °á°ú·Î ÇϾǰñÈÄÅð¼úÀº »ó±âµµ °ø°£À» Àå¤ý´Ü±â°£µ¿¾È °¨¼ÒÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù.

Objective: Lateral cephalometric radiographs have been the main form of resource for assessing two dimensional
anteroposterior airway changes. The purpose of this study was to evaluate the three dimensional volumetric
change in the upper airway space in Class III malocclusion patients who underwent mandibular setback surgery.

Methods: Three dimensional cone-beam computed tomographs (CBCT) and their three dimensional reconstruction images were analyzed. The samples consisted of 20 adult patients (12 males and 8 females) who
were diagnosed as skeletal Class III and underwent mandibular setback surgery. CBCTs were taken at 3 stages
- Baseline (1.8 weeks before surgery), T1 (2.3 months after surgery), and T2 (1 year after surgery). Pharyngeal
airway was separated according to the reference planes and reconstructed into the nasopharynx, the oropharynx
and the hypopharynx. Measurements at Baseline, T1, and T2 were compared between groups.

Results: The result showed the volume of the pharyngeal airway decreased significantly 2.3 months after surgery (p £¼ 0.001) and the diminished airway did not recover after 1 year post-surgery. The oropharynx was the most decreased
area.

Conclusions: These findings suggest that mandibular setback surgery causes both short-term and long-term
decrease in the upper airway space.

Å°¿öµå

Äܺö Àü»êÈ­ ´ÜÃþÃÔ¿µ;¾Ç±³Á¤ ¼ö¼ú;»ó±âµµ
Cone-beam computed tomography;Orthognathic surgery;Pharyngeal airway

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