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The differences of STO between before and after presurgical orthodontics in skeletal Class III malocclusions

Korean Journal of Orthodontics 2008³â 38±Ç 3È£ p.175 ~ 186
ÀÌÀºÁÖ, ¼Õ¿ì¼º, ¹Ú¼öº´, ±è¼º½Ä,
¼Ò¼Ó »ó¼¼Á¤º¸
ÀÌÀºÁÖ ( Lee Eun-Ju ) - ºÎ»ê´ëÇб³º´¿ø Ä¡°ú±³Á¤°ú
¼Õ¿ì¼º ( Son Woo-Sung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°ú±³Á¤Çб³½Ç
¹Ú¼öº´ ( Park Soo-Byung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°ú±³Á¤Çб³½Ç
±è¼º½Ä ( Kim Seong-Sik ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°ú±³Á¤Çб³½Ç

Abstract

º» ¿¬±¸´Â ¼ú Àü ±³Á¤Ä¡·á Àü Ä¡¾Æ À̵¿ ¿¹ÃøÄ¡(initial STO)¿Í ¼ú Àü ±³Á¤Ä¡·á ÈÄ ½ÇÃøÄ¡¿¡ ¹ÙÅÁÀ» µÐ STO (final STO)¸¦ ºñ±³ÇÏ°íÀÚ ½ÃÇàµÇ¾ú´Ù. ºÎ»ê´ëÇб³º´¿ø Ä¡°ú±³Á¤°ú¿¡ ³»¿øÇÏ¿© ±³Á¤ ¹× ¾Ç±³Á¤¼ö¼ú º¹ÇÕÄ¡·á¸¦ ½ÃÇà ¹ÞÀº ȯÀÚ Áß ÇϾǸ¸ ¼ö¼úÇÑ È¯ÀÚ 40¸íÀ» ¼±Á¤ÇÏ¿© »ó¾Ç Á¦1¼Ò±¸Ä¡ ¹ßÄ¡ ¿©ºÎ¿¡ µû¶ó µÎ ±×·ì(¹ßÄ¡ ±×·ì 20¸í, ºñ¹ßÄ¡ ±×·ì 20¸í)À¸·Î ºÐ·ùÇÏ¿´´Ù. ¼ú Àü ±³Á¤Ä¡·á ÀüÀÇ initial STO, ¼ú Àü ±³Á¤Ä¡·á ÈÄÀÇ final STO¸¦ ÀÛ¼ºÇÏ¿© °¢ °èÃøÄ¡¸¦ ¼öÆò, ¼öÁ÷ ±âÁؼ±¿¡ ´ëÇØ °Å¸®¸¦ ÃøÁ¤ÇÏ¿© ºñ±³ÇÏ¿´´Ù. ¹ßÄ¡ ±×·ìÀÇ µÎ STO ºñ±³ ½Ã ¼öÁ÷ÀûÀ¸·Î »ó¾Ç ÁßÀýÄ¡Àý´Ü¿¬°ú Ä¡±Ù´Ü, »ó¾Ç Á¦1´ë±¸Ä¡ ÇùÃø±³µÎ¿¡¼­, ¼öÆòÀûÀ¸·Î »ó¾Ç ÁßÀýÄ¡ Àý´Ü¿¬, »ó¾Ç Á¦1´ë±¸Ä¡ ±Ù½ÉÇùÃø±³µÎ, ÇÏ¾Ç ÁßÀýÄ¡ Ä¡±Ù´Ü, ÇÏ¾Ç Á¦1´ë±¸Ä¡ ±Ù½É¸é°ú ±Ù½ÉÇùÃø±³µÎ¿¡¼­ Â÷À̸¦ º¸¿´À¸¸ç ºñ¹ßÄ¡ ±×·ìÀÇ °æ¿ì´Â ¼öÁ÷ÀûÀ¸·Î ÇÏ¾Ç ÁßÀýÄ¡ Ä¡±Ù´Ü, ¼öÆòÀûÀ¸·Î »ó¾Ç ÁßÀýÄ¡ Àý´Ü¿¬, ÇÏ¾Ç ÁßÀýÄ¡ Àý´Ü¿¬°ú Ä¡±Ù´Ü, ÇÏ¾Ç Á¦1´ë±¸Ä¡ ±Ù½É¸é¿¡¼­ Â÷À̸¦ º¸¿´´Ù. µÎ STOÀÇ Â÷ÀÌ¿Í initial STO ¼ö¸³¿¡ ¿µÇâÀ» ¹ÌÄ¥ ¼ö ÀÖ´Â ¿©·¯ Áø´Ü ¿ä¼Ò¿ÍÀÇ »ó°ü¼º Æò°¡ ½Ã »ó¾Ç Ä¡¿­±Ã °ø°£ ºÎÁ··®ÀÌ »ó¾Ç ÀüÄ¡ÀÇ ¼öÆò, ¼öÁ÷ ¹× Á¦1´ë±¸Ä¡ÀÇ ¼öÆò À§Ä¡ ¿¹Ãø¿¡ À¯ÀÇÇÑ »ó°ü¼ºÀ» °¡Á³À¸¸ç µÎ ±×·ì ¸ðµÎ ÇÏ¾Ç ÀüÄ¡ Ä¡Ãà °¢µµ¿Í ÇÏ¾Ç Ä¡¿­±Ã °ø°£ ºÎÁ··®ÀÌ ÇÏ¾Ç ÀüÄ¡ÀÇ ¼öÆò À§Ä¡ ¿¹Ãø¿¡ À¯ÀÇÇÑ »ó°ü¼ºÀ» º¸¿´´Ù. Initial STO ÀÛ¼º°ú ¼ú Àü ±³Á¤ ´Ü°è¿¡¼­ À̸¦ °í·ÁÇÏ¿© ÁøÇàÇÑ´Ù¸é Á» ´õ È¿À²ÀûÀÎ Ä¡·á °èȹ ¼ö¸³ ¹× ÀüüÀûÀÎ Ä¡·á ±â°£À» ÁÙÀÌ´Â °Í¿¡µµ µµ¿òÀÌ µÉ °ÍÀ̶ó »ý°¢ÇÑ´Ù. (´ëÄ¡±³Á¤Áö 2008;38(3):175-186)

Objective: To evaluate the discrepancies between initial STO and final STO in Class III¡¡malocclusions and to find which factors are related to the discrepancies.

Methods: Twenty patients were selected for the extraction group and 20 patients for the non-extraction group. They were diagnosed as skeletal Class III and received presurgical orthodontic treatment and mandibular set-back surgery at Pusan National University Hospital. The lateral cephalograms were analyzed for initial STO (T1s) at pretreatment and final STO (T2s) after presurgical orthodontic treatment, and specified the landmarks as coordinates of the X and Y axes.

Results: Differences in hard tissue points (T1s-T2s) in the X coordinates of upper central incisor edge, upper first molar mesial end surface, lower central incisor apex, lower first molar mesial end surface and mesio-buccal cusp and Y coordinates of upper central incisor edge, upper central incisor apex, upper first molar mesio-buccal cusp were statistically significant in the extraction group. Differences in hard tissue points (T1s-T2s) in the X coordinates of upper central incisor edge, lower central incisor apex, lower first molar mesial end surface and Y coordinates of lower central incisor apex were statistically significant in the non-extraction group. In the extraction group, the upper arch length discrepancy (UALD) had a statistically significant effect on maxillary incisor and first molar estimation. Lower arch length discrepancy and IMPA had statistically significant effects on mandibular incisor estimation in both groups.

Conclusions: Discrepancies between initial STO and final STO and factors contributing to the accuracy of initial STO must be considered in treatment planning of Class III surgical patients to increase the accuracy of prediction. (Korean J Orthod 2008;38(3):175-186)

Å°¿öµå

°ñ°Ý¼ºIII±ÞºÎÁ¤±³ÇÕ;¼úÀü±³Á¤;STO;FinalSTO
SkeletalClassIIImalocclusion;Presurgicalorthodontics;STO;FinalSTO

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