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THE DELAYED DEVELOPMENT OF MANDIBULAR SECOND PREMOLARS - A PITFALL FOR MISDIAGNOSIS OF CONGENITAL ABSENCE
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¿ì¿¬¼± ( Woo Youn-Sun ) - ºÎ»ê´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
Á¤Å¼º ( Jeong Tae-Sung ) - ºÎ»ê´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
±è½Å ( Kim Shin ) - ºÎ»ê´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
KMID : 0358920010280030369
Abstract
ÇÏ¾Ç Á¦2¼Ò±¸Ä¡ÀÇ ¼±Ãµ°á¼ÕÀº ºñ±³Àû ÈçÈ÷ ³ªÅ¸³ª´Â ÀÌ»óÀ¸·Î, ¹æ»ç¼±»çÁø¿¡¼ °á¼ÕÀ¸·Î È®ÀεǴ °æ¿ì ¿©·¯°¡Áö Ä¡·á¹æ¹ýÀ» °í·ÁÇÒ ¼ö ÀÖ´Ù. ȯÀÚÀÇ ¿¬·É, Á¦2À¯±¸Ä¡ Ä¡±ÙÀÇ Èí¼ö»óÅÂ, ÃÑ»ýÀÇ Á¤µµ, ¾Ç°ñÀÇ ¼ºÀå, Ãø¸ðÀÇ ÇüÅÂ, ÀýÄ¡ÀÇ µ¹Ãâµµ, ÇÏ¾È ¸ð°í°æ µîÀ» °í·ÁÇÏ¿© Ä¡·á¹æ¹ýÀ» ¼±ÅÃÇÏ°Ô µÈ´Ù. ±×·¯³ª, ¼±Ãµ°á¼ÕÀÇ Áø´Ü°ú Ä¡·á¹æ¹ýÀÇ °áÁ¤¿¡ ÀÖ¾î¼ ÁÖÀÇÇØ¾ß ÇÒ Á¡ÀÌ ÀÖ´Ù. ÇÏ¾Ç Á¦2¼Ò±¸Ä¡´Â ºÐÈ¿Í ¼®È¸È°úÁ¤¿¡ ÀÖ¾î¼ °¡Àå ¸¹Àº º¯À̸¦ º¸ÀÌ´Â Ä¡¾ÆÀÌ´Ù. °æÁ¶Á÷ Çü¼ºÀº ¼¼¿¡ ½ÃÀ۵Ǹç, ´ëºÎºÐ Àû¾îµµ ¼¼¿¡´Â ½ÃÀ۵ȴÙ. ±×·¯³ª, ÀÌ ½Ã±â´Â ´Ù¸¥ ¿µ±¸Ä¡¿¡ ºñÇØ ±× ¹üÀ§°¡ ¸Å¿ì ³Ð¾î¼ ¼¼, µå¹°°Ô´Â ±× ÀÌÈÄ¿¡ ¹ßÀ°ÀÌ ½ÃÀ۵Ǵ °æ¿ìµµ ÀÖ´Ù. ±×·¯¹Ç·Î ÇÏ¾Ç Á¦2¼Ò±¸Ä¡ÀÇ ¼±Ãµ°á¼ÕÀ» Á¶±â¿¡ Áø´ÜÇϱ⿡´Â ¾î·Á¿òÀÌ ÀÖÀ¸¸ç, ¼±Ãµ°á¼ÕÀ¸·Î Áø´ÜÇÑ °æ¿ì¶óµµ ¿ÀÁøÇÒ °¡´É¼ºÀÌ ÀÖÀ½À» ÀνÄÇÏ´Â °ÍÀÌ Áß¿äÇÏ´Ù. ÀúÀÚ´Â µÎ °¡Áö Áõ·Ê¸¦ ÅëÇÑ Àӻ󿬱¸¿Í ¹®Çå°íÂûÀ» ÅëÇØ ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù. 1. µÎ Áõ·Ê ¸ðµÎ¿¡¼ ÇÏ¾Ç Á¦2¼Ò±¸Ä¡ÀÇ µÎµå·¯Áø ¹ßÀ°Áö¿¬ÀÌ °üÂûµÇ¾ú´Ù. 2. Ä¡¹èÇü¼º ÀÌÈÄÀÇ ¼®È¸È ¼Óµµ´Â °ÅÀÇ Á¤»óÀûÀ¸·Î ³ªÅ¸³ °ÍÀ» º¸¾Æ, ¹ßÀ°Áö¿¬Àº ¼®È¸È °úÁ¤º¸´Ù´Â ºÐÈ°úÁ¤¿¡ ÀÖ¾ú´ø °ÍÀ¸·Î ÆǴܵǾú´Ù. 3. ÀÌ¿Í À¯»çÇÑ Áõ·Ê¸¦ Á¢ÇÏ¿´À» °æ¿ì, Ä¡¾ÆÀÇ ¼±Ãµ°á¼ÕÀ¸·Î ´ÜÁ¤Çϱ⠺¸´Ù´Â ¹ßÀ°Áö¿¬ÀÇ °¡´É¼ºÀ» ÇÔ²² °í·Á ÇÒ ÇÊ¿ä°¡ ÀÖÀ» °ÍÀ¸·Î »ç·áµÇ¾ú´Ù.
The congenital missing of mandibular second premolars is among the common dental anomaly in children. When a second premolar is diagnosed as congenitally missed, we should consider many factors influencing the treatment plan such as patient¡¯s age, states of roots of 2nd primary molar, degree of crowding, skeletal growth pattern, facial profile, procumbency of the incisor and lower facial height, etc. The mineralization of the second premolars begins in the majority of cases at the age of years, but this period varies more widely than those for other permanent teeth. Also, mandibular second premolars show the greatest variations in differentiation and calcification. For this reason, aplasia of this group of teeth cannot be diagnosed at early age and with the same degree of certainty. From the clinical studies with 2 cases and some literature review on late development of second premolars, it could be summarized as follows : 1. The 2 cases showed marked delay in the development of mandibular second premolars. 2. After the crypt formation, the speed of calcification seemed nearly normal, suggesting that the delay was due to differentiation rather than calcification. 3. When one is encountered with similar conditions, it would be desirable to consider the possibility of delayed tooth development.
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Mandibular second premolar;Delayed development;Congenital missing
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