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Predictive Factors of Ectopic Eruption of the Maxillary First Permanent Molar

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±è¹Ì¼± ( Kim Mi-Sun ) - °æÈñ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
ÀÌÈ¿¼³ ( Lee Hyo-Seol ) - °æÈñ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
ÃÖ¼ºÃ¶ ( Choi Sung-Chul ) - °æÈñ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

º» ¿¬±¸´Â À̼ҸÍÃâÇÑ »ó¾Ç Á¦1´ë±¸Ä¡ÀÇ ÀÚÀ²Àû ¼öÁ¤ °¡´É¼ºÀ» ¿¹ÃøÇÒ ¼ö ÀÖ´Â Áø´ÜÀû ±âÃʸ¦ Á¦°øÇϱâ À§ÇÏ¿© Á¤»ó±º°ú °¡¿ª¼º°ú ºñ°¡¿ª¼º À̼ҸÍÃâÀÇ Â÷ÀÌÁ¡À» ºñ±³ Æò°¡ÇÏ°íÀÚ ÈÄÇâÀûÀ¸·Î ºÐ¼®ÇÏ¿´´Ù. »ó¾Ç Á¦1´ë±¸Ä¡¿Í ÀÎÁ¢Ä¡¾Æ °£ÀÇ ÀåÃà°ú ±³ÇÕÆò¸é°£ÀÇ °¢µµ¸¦ Æijë¶ó¸¶»ó¿¡¼­ ÃøÁ¤ÇÏ¿´°í, Á¦2À¯±¸Ä¡ÀÇ ±³ÇÕ°ü°èµµ Á¶»çÇÏ¿´´Ù. À̼ҸÍÃⱺ°ú Á¤»ó±ºÀº Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÑ Â÷À̸¦ º¸¿´Áö¸¸(p < 0.05), °¡¿ª¼º°ú ºñ°¡¿ª¼º À̼ҸÍÃⱺ °£¿¡´Â Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ´Â ¾ø¾ú´Ù(p >0.05). Á¦2À¯±¸Ä¡¿Í Á¦1´ë±¸Ä¡ ±×¸®°í Á¦2´ë±¸Ä¡ Ä¡¹è °£ÀÇ °¢µµ´Â Á¤»ó±º¿¡ ºñÇØ À̼ҸÍÃâ ±º¿¡¼­ ÀÛÀº °ªÀ» º¸¿´À¸¸ç, ±Ù½É °è´ÜÇüÀÌ À̼ҸÍÃⱺ¿¡¼­ ´õ ³ôÀº ºóµµ·Î °üÂûµÇ¾ú´Ù. º» ¿¬±¸ÀÇ °á°ú¸¦ Åä´ë·Î »ó¾Ç Á¦1´ë±¸Ä¡ÀÇ À̼ҸÍÃâÀº »ó¾Ç Á¦1´ë±¸Ä¡¿Í Á¦2´ë±¸Ä¡ Ä¡¹èÀÇ °¢µµ¿Í °ü·ÃÀÌ ÀÖÀ¸¸ç, À̼ҸÍÃâÇÑ »ó¾Ç Á¦1´ë±¸Ä¡´Â »ó¾Ç Àú¼ºÀåÀÇ 3±Þ ºÎÁ¤±³ÇÕ È¯ÀÚ¿¡¼­ º¸´Ù ºó¹øÇÏ°Ô ³ªÅ¸³ª´Â °æÇâÀÌ ÀÖ´Â °ÍÀ» ¾Ë ¼ö ÀÖ¾ú´Ù.

In order to provide a diagnostic basis for predicting the possibility of the self-correction of ectopic first permanent molars, differences among normal eruption, reversible and irreversible ectopic eruption of maxillary first permanent molars were retrospectively analyzed. The angles of the long axes and the occlusal lines between the maxillary first permanent molar and the adjacent tooth were measured by panoramic radiographs. The occlusal relationship of second primary molars was also investigated. There is a statistically significant difference between the ectopic eruption group and normal group (p < 0.05), but not between the reversible and irreversible ectopic eruption groups (p > 0.05). The angles between the second primary molar and the first permanent molar, the second primary molar and the second permanent molar in ectopic groups showed a smaller degree than those of the control group. Mesial step was found more frequently in the ectopic eruption group than the normal group. In conclusion, the angulation of the first permanent molar and tooth germ of the maxillary second permanent molar showed close relation with ectopic eruption of the maxillary first permanent molar and ectopic first permanent molar is likely to occur in class ¥² patients with maxillary deficiency.

Å°¿öµå

»ó¾Ç Á¦1´ë±¸Ä¡; °¡¿ª¼º À̼ҸÍÃâ; ºñ°¡¿ª¼º À̼ҸÍÃâ
First permanent molar; Irreversible ectopic eruption; Reversible ectopic eruption

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