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A comparative study of pre- and post-treatment cephalometric measurements: Upper premolar extraction only vs. upper/lower premolar extraction groups

Korean Journal of Orthodontics 2007³â 37±Ç 6È£ p.421 ~ 431
±è¿µ¼®, ±è¼öÁ¤, °­½Â±¸, ÀÌ¿µÁØ,
¼Ò¼Ó »ó¼¼Á¤º¸
±è¿µ¼® ( Kim Young-Seok ) - °æÈñ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ±³Á¤Çб³½Ç
±è¼öÁ¤ ( Kim Su-Jung ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
°­½Â±¸ (  ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
ÀÌ¿µÁØ ( Lee Young-Jun ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç

Abstract

»ó¾Ç Æí¾Ç ¼Ò±¸Ä¡¹ßÄ¡¿¡ ÀÇÇÑ ±³Á¤Ä¡·á´Â ÀÓ»óÀûÀ¸·Î »ó´çÈ÷ ¸¹ÀÌ ÇàÇØÁö°í ÀÖ´Â Çö½ÇÀÌÁö¸¸ ÀÓ»óÀû È°¿ëµµ¿¡ ºñÇÏ¿© ±× º¸°í´Â Èñ±ÍÇÏ´Ù. º» ¿¬±¸´Â ¼±ÅÃÀû ±³Á¤Ä¡·á·Î ÇàÇØÁö´Â »ó¾Ç Æí¾Ç ¼Ò±¸Ä¡¹ßÄ¡¿¡ ÀÇÇÑ ±³Á¤Ä¡·á ½Ã Ä¡·áÀüÈÄÀÇ »ó, ÇÏ¾Ç ÀýÄ¡À§Ä¡ ¹× ÀÔ¼úÀ§Ä¡ º¯È­¸¦ ¾ç¾Ç ¼Ò±¸Ä¡¹ßÄ¡¿¡ ÀÇÇÑ ±³Á¤Ä¡·áÀÇ Ä¡·á ÀüÈÄ¿Í ºñ±³, ºÐ¼®ÇÏ¿© Æí¾Ç¹ßÄ¡¿¡ ÀÇÇÑ ±³Á¤Ä¡·áÀÇ Áø´ÜÀû ÁöħÀ» Á¦½ÃÇÏ°í Ä¡·á Á¾·á ÈÄÀÇ Ä¡·á°á°ú¸¦ ¾Ë¾Æº¸°íÀÚ ½ÃÇàµÇ¾ú´Ù. ÃÖ±Ù¿¡ ±³Á¤Ä¡·á°¡ Á¾·áµÈ ȯÀÚ Áß¿¡¼­ ÃÊÁø ½Ã ¼öÆòÇÇ°³·®ÀÌ 7 mm ÀÌ»óÀ» º¸ÀÌ´Â Áõ·Ê Áß ¼º°øÀûÀ¸·Î Ä¡·áµÇ¾ú´Ù°í ÆǴܵǴ 40Áõ·Ê¸¦ ¼±Á¤ÇÏ¿©, ±³Á¤Ä¡·áÀÇ ¸ñÀûÀ¸·Î »ó¾Ç Á¦1¼Ò±¸Ä¡¸¸À» ¹ßÄ¡ÇÏ¿© Ä¡·áÇÑ ±º(ÀÌÇÏ Æí¾Ç¹ßÄ¡±º; Group 1, 20Áõ·Ê)°ú »ó, ÇÏ¾Ç Á¦1¼Ò±¸Ä¡¸¦ ¹ßÄ¡ÇÏ¿© Ä¡·áÇÑ ±º(ÀÌÇÏ ¾ç¾Ç¹ßÄ¡±º; Group 2, 20Áõ·Ê)À¸·Î ³ª´©¾î Ä¡·á ÀüÈÄÀÇ Ãø¸ð µÎºÎ¹æ»ç¼± »çÁøÀ» äµæÇÏ¿© ¿¬±¸Àç·á·Î »ç¿ëÇÏ¿´´Ù. ¿¬±¸°á°ú ÃÊÁø ½Ã Æí¾Ç¹ßÄ¡±º¿¡¼­ ¾ç¾Ç¹ßÄ¡±º°ú ºñ±³ÇÏ¿© ÇÏ¾Ç ÀýÄ¡ÀÇ À§Ä¡´Â ¼øÃø°æ»çÀÇ Á¤µµ°¡ ´ú ÇÏ¿´À¸¸ç ÇϼøÀÇ µ¹Ãâµµµµ ½ÉÇÏÁö ¾Ê¾Ò´Ù. Ä¡·áÁ¾·á ½Ã Æí¾Ç¹ßÄ¡±º¿¡¼­ ¾ç¾Ç¹ßÄ¡±º°ú ºñ±³ÇÏ¿© ÇÏ¾Ç ÀýÄ¡ÀÇ À§Ä¡¸¦ Á¦¿ÜÇÑ ¸ðµç Ç׸ñ¿¡¼­ µÎ ±º°úÀÇ Â÷ÀÌ´Â °üÂûµÇÁö ¾Ê¾Ò´Ù. Ä¡·á ÀüÈÄÀÇ º¯È­·® ºñ±³¿¡¼­ »ó, ÇÏ¾Ç ÀýÄ¡ÀÇ À̵¿·®Àº ¾ç¾Ç¹ßÄ¡±º¿¡¼­ ¸¹°Ô °üÂûµÇ¾úÀ¸¸ç ÇÏ¾Ç ÀýÄ¡ÀÇ °ßÀο¡ µû¶ó ÇϼøÀÇ µ¹Ãâµµ °¨¼ÒÀÇ ¾çµµ ¾ç¾Ç¹ßÄ¡±º¿¡¼­ Å©°Ô °üÂûµÇ¾ú´Ù. »ó¼øÀÇ À§Ä¡´Â µÎ ±º°£ÀÇ Â÷ÀÌ°¡ °üÂûµÇÁö ¾Ê¾Ò´Ù. Å« ¼öÆòÇÇ°³¸¦ °®´Â Áõ·Ê¿¡¼­ ÀûÀýÇÑ ¹ßÄ¡ ¼±ÅÃÀ» À§ÇÑ Áø´ÜÁ¤º¸ÀÇ ¼öÁý¿¡ ÀÖ¾î »ó¾Ç ÀýÄ¡ÀÇ À§Ä¡ ¹× »ó¼øÀÇ µ¹Ãâµµ´Â ÃæºÐÇÑ Á¤º¸¸¦ Á¦°øÇÏÁö ¾Ê¾Ò´Ù. ÇÏ¾Ç ÀýÄ¡ÀÇ À§Ä¡¿Í ÇϼøÀÇ µ¹Ãâ·®Àº Å« ¼öÆòÇÇ°³¸¦ °®´Â Áõ·Ê¿¡ À־ Æí¾Ç¹ßÄ¡ ȤÀº ¾ç¾Ç¹ßÄ¡¸¦ °áÁ¤Çϱâ À§ÇÑ ÀûÀýÇÑ Áø´ÜÀû ±Ù°Å¸¦ Á¦½ÃÇÏ¿´´Ù. Å« ¼öÆòÇÇ°³¸¦ °®°í Àִ ȯÀÚ Áß ÇÏ¾Ç ÀýÄ¡ÀÇ ¼øÃø°æ»ç°¡ ½ÉÇÏÁö ¾ÊÀ¸¸ç ÇϼøÀÇ µ¹ÃâÀÌ ½ÉÇÏÁö ¾ÊÀº ¾È¸ð¸¦ °®°í ÀÖ´Â Áõ·ÊÀÇ °æ¿ì Æí¾Ç¹ßÄ¡¿¡ ÀÇÇØ ÁÁÀº Ä¡·á°á°ú¸¦ ¾òÀ» ¼ö ÀÖ¾ú´Ù.

The objective of this study was to provide guidelines for the diagnosis and successful treatment of orthodontic treatment with upper premolar extraction only

Methods:The sample group consisted of 40 patients (20 with upper premolar extraction only, 20 with both upper and lower premolar extractions) who showed an overjet of more than 7 mm and were finished successfully. Lateral cephalographs were taken before and after orthodontic treatment. Landmarks showing the position of the upper and lower incisors and the position of the upper and lower lip were determined and angular measurement of these values were obtained for statistical analysis (Mann-Whitney test).

Results:At pre-treatment, the position of the lower incisor was less labially inclined and the convexity of the lower lip was smaller in the upper premolar extraction only group than in the upper/lower premolar extraction group. At post-treatment, there was no difference in all measurements except for the position of the lower incisor. A comparison of changes between pre- and post-treatment showed that the retraction of upper & lower incisors and the decrease in convexity of the lower lip were greater in the upper/lower premolar extraction group.

Conclusion: Treatment by upper premolar extraction can be of benefit for patients whose lower incisor proclination and lower lip protrusion are not excessive.

Å°¿öµå

Ãø¸ð µÎºÎ¹æ»ç¼±»çÁø;Æí¾Ç¹ßÄ¡;ÇÏ¾Ç ÀýÄ¡
Lateral cephalographs;Upper premolar extraction only;Lower incisor

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