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ERUPTION GUIDANCE OF IMPACTED MANDIBULAR FIRST MOLAR

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Abstract

¿µ±¸Ä¡ÀÇ ¸Åº¹Àº ´Ù¾çÇÑ ºóµµ·Î º¸°íµÇ¸ç, Àα¸ Áý´ÜÀÇ ¾à 5.6~18.8%¿¡¼­ ¹ß»ýÇÑ´Ù. ±× Áß¿¡¼­ ÇÏ¾Ç Á¦2´ë±¸Ä¡ÀÇ ¸ÍÃâÀå¾Ö ºóµµ´Â ¾à 0.06%, ÇÏ¾Ç Á¦1´ë±¸Ä¡´Â ¾à 0.01%·Î ¸Å¿ì µå¹°°Ô ³ªÅ¸³­´Ù. ¿µ±¸ ´ë±¸Ä¡´Â ±â´ÉÀûÀ¸·Î ÀúÀÛÀ» À§ÇÑ Áß¿äÇÑ ±³ÇÕÀû ÁöÁö¸¦ Á¦°øÇÏ¸ç ¾È¸éÀÇ Á¶È­·Î¿î ¼ºÀå¹ßÀ°¿¡ Áß¿äÇÑ ¿ªÇÒÀ» ´ã´çÇÑ´Ù. ¿µ±¸ ´ë±¸Ä¡ÀÇ ¸Åº¹½Ã ¹ß»ýµÇ´Â ¹®Á¦Á¡À¸·Î´Â ±¸Ä¡ºÎÀÇ °³¹æ±³ÇÕ°ú ´ëÇÕÄ¡ÀÇ Á¤Ãâ, ÀÎÁ¢Ä¡ÀÇ Ä¡±ÙÈí¼ö¿Í ±â¿ï¾îÁü, ³¶Á¾ÀÇ Çü¼º, ½ÉÇÒ °æ¿ì ÇϾȸé°í°æÀÇ °¨¼Ò µî ¿©·¯ °¡Áö ¹®Á¦Á¡ÀÌ À¯¹ßµÉ ¼ö ÀÖ´Ù. ¸Åº¹Ä¡ÀÇ Ä¡·á ¹æ¹ýÀ¸·Î´Â ¿ì¼±ÀûÀ¸·Î ¿Ü°úÀû³ëÃâ¼úÀ» »ý°¢ÇØ º¼ ¼ö ÀÖÀ¸¸ç, ¿Ü°úÀû³ëÃâ¼ú ÈÄ¿¡ Ãß°¡ÀûÀÎ ÀÎÀ§Àû ¾ÆÅ»±¸·Î ÀÚ¹ßÀû¸ÍÃâÀ» ±â´ëÇØ º¼ ¼öµµ ÀÖ´Ù. ÀÚ¹ßÀû¸ÍÃâÀÌ °üÂûµÇÁö ¾ÊÀ¸¸é ±³Á¤Àû °­Á¦ °ßÀÎÀ̳ª ¿Ü°úÀûÀçÀ§Ä¡¼úÀ» °í·ÁÇØ º¼ ¼ö ÀÖÀ¸¸ç, ÃÖ¾ÇÀÇ °æ¿ì¿¡´Â ¹ßÄ¡ ÈÄ º¸Ã¶Ä¡·á¸¦ ÁغñÇØ¾ß ÇÒ °ÍÀÌ´Ù. ¸ÍÃâÀå¾Ö¸¦ º¸ÀÌ´Â Ä¡¾ÆÀÇ Á¶±âÁø´Ü°ú Ä¡·á´Â Áß¿äÇÑ Àǹ̸¦ °®´Âµ¥, ´ÊÀº ½Ã±â¿¡ ¹ß°ßµÉ °æ¿ì ÀÚ¹ßÀû ¸ÍÃâ·ÂÀÌ °¨¼ÒµÇ¾î Ä¡·áÀÇ ¼º°ø·üµµ °¨¼ÒÇÏ°í, Ä¡·á±â°£µµ Áõ°¡Çϸç ÀÓ»óÀûÀ¸·Î ´Ù¾çÇÑ ÇÕº´ÁõÀ» ¾ß±âÇϱ⠶§¹®ÀÌ´Ù. µû¶ó¼­, ÇÏ¾Ç Á¦1´ë±¸Ä¡ÀÇ ¸ÍÃâÀå¾Ö¸¦ Á¶±â¿¡ ¹ß°ßÇÒ °æ¿ì ¿ì¼±ÀûÀ¸·Î ¸ÍÃâÀ¯µµ¸¦ °í·ÁÇØ º¼ ÇÊ¿ä°¡ ÀÖ´Ù. ´ÙÀ½ µÎ Áõ·Ê´Â ¸Åº¹µÈ ÇÏ¾Ç Á¦1´ë±¸Ä¡¿¡ ´ëÇÏ¿© ¿Ü°úÀû ³ëÃâ¼úÀ» ½ÃÇà ÈÄ ÀÚ¹ßÀû ¸ÍÃâÀ» ±â´ëÇÏ¿´À¸³ª »ó¹ÝµÈ °á°ú¸¦ ¾ò¾ú±â¿¡ º¸°íÇÏ´Â ¹ÙÀÌ´Ù.

Incidence of tooth impaction varies from 5.6 to 18.8% of the population. Failure of eruption of the first and second permanent molars is rare; the prevalence in the normal population is 0.01% in case of the first permanent molar, and 0.06% in case of the second permanent molar. Permanent molars are particularly important for providing sufficient occlusal support and co-ordinating facial growth. Failure of eruption of permanent molars may result in various complications such as decrease in vertical dimension, posterior open bite, extrusion of antagonistic teeth, resorption and inclination of adjacent teeth, formation of cyst and so on. Treatment options of impacted teeth are periodic observation, surgical exposure, surgical exposure with subluxation, orthodontic relocation, and surgical extraction before prosthetic treatment. Early diagnosis and treatment are important, because delayed treatment induces various problems such as decreased spontaneous eruptive force, decreased successful percentage, increased treatment period, increased various complications. Prevalence of the failure of mandibular first molars is rare but eruptive guidance before extraction of impacted teeth is necessary due to importance of permanent molars. We reported two cases of surgical exposure of impacted mandibular first molar. In these cases, we could observe different result of the impacted mandibular first molar after surgical exposure.

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Mandibular first molar; Failure of eruption; Surgical exposure; Spontaneous eruption

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