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THE SECOND MESIOBUCCAL CANAL OF UPPER PRIMARY MOLAR

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Abstract

À¯Ä¡¿¡¼­´Â ¿µ±¸Ä¡¿¡ ºñÇØ ¹ý¶ûÁúÀÇ µÎ²²°¡ ¾ã°í ¾àÇÏ¸ç »ó´ëÀûÀ¸·Î Å« Ä¡¼ö°­À¸·Î ÀÎÇÏ¿© ´Ü½Ã°£¿¡ Ä¡¾Æ¿ì½ÄÁõÀÌ Ä¡¼ö±îÁö ÀÌȯµÇ¸ç, ¿Ü»ó ¶Ç´Â Ä¡°úÄ¡·á Áß °©ÀÛ½º·± ¿òÁ÷ÀÓÀ¸·Î ÀÎÇÏ¿© Ä¡¼ö°¡ ³ëÃâµÇ´Â °æ¿ì°¡ ºó¹øÇÏ´Ù. ÀÌ·¯ÇÑ ÀÌÀ¯·Î ¾î¸°ÀÌ¿¡¼­ÀÇ Ä¡¼öóġ´Â ÇʼöÀûÀ̸ç, À¯Ä¡¿¡¼­ Ä¡¼öÄ¡·áÀÇ ¸ñÀûÀº °¨¿°µÈ Ä¡¼öÁ¶Á÷À» Á¦°ÅÇÏ¿© µ¿ÅëÀ» ¿ÏÈ­½ÃÅ°´Â °Í ÀÌ¿Ü¿¡µµ Å©°Ô ´Â Ä¡¿­±ÃÀ» º¸Á¸ÇÏ¿© ÀúÀÛ±â´ÉÀ» º¸È£ÇÏ°í, ¹Ì·¡ÀÇ ¿µ±¸Ä¡¿­ÀÌ ÀûÀýÇÑ ±³ÇÕ°ü°è¸¦ ÀÌ·ç°Ô Çϴµ¥ ÀÖ´Ù.
À¯Ä¡¿­¿¡¼­ ¼º°øÀûÀÎ Ä¡¼öÄ¡·á¸¦ À§Çؼ­´Â À¯Ä¡ Ä¡¼öÀÇ ÇüÅÂ, À¯Ä¡ ±Ù°üÀÇ ÇغÎÇÐÀû ÇüÅ ġ±ÙÇü¼º, ±×¸®°í À¯Ä¡ Ä¡±ÙÀÇ Èí¼ö¿Í °ü·ÃµÈ Ưº°ÇÑ ¹®Á¦Á¡µé¿¡ ´ëÇÑ ÀÌÇظ¦ ÇÊ¿ä·Î ÇÑ´Ù.
»ó¾Ç ´ë±¸Ä¡¿Í ¸¶Âù°¡Áö·Î »ó¾Ç À¯±¸Ä¡ÀÇ ±Ù½É Ä¡±ÙÀÌ ÇüÅ¿¡ À־ °¡Àå Å« º¯À̸¦ º¸ÀÎ´Ù°í ¾Ë·ÁÁ® ÀÖÀ¸¸ç, ÀÌ Ä¡±Ù ³»¿¡ Á¸ÀçÇÏ´Â ¸ðµç ±Ù°üÀ» óġÇÏÁö ¸øÇÑ´Ù¸é °á±¹ Ä¡¼øÄ¡·á´Â ½ÇÆÐÇÒ °ÍÀÌ´Ù.
º» Áõ·Ê´Â ±Ù°üÄ¡·á ÁßÀ̰ųª ÈÄ¿¡ Áö¼ÓÀûÀÎ µ¿ÅëÀ̳ª ±Ù°ü ³» ÃâÇ÷ÀÌ Áö¼ÓµÇ´Â °æ¿ì¿¡¼­ »ó¾Ç À¯±¸Ä¡ÀÇ ±Ù½ÉÇùÃøÄ¡±ÙÀÇ Á¦ 2±Ù½ÉÇùÃø±Ù°üÀ» ¹ß°ßÇÏ°í óġÇÑ ÈÄ ÀÓ»óÁõ»ó ¹× µ¿ÅëÀÌ »ç¶óÁö°í, ¾çÈ£ÇÑ ¿¹Èĸ¦ º¸¿´´Ù. ¶ÇÇÑ ¹ß°ÅµÈ »ó¾Ç À¯±¸Ä¡¸¦ ´ë»óÀ¸·Î ÇÑ Á¶»ç °á°ú »ó¾Ç Á¦ 1À¯±¸Ä¡´Â 35°³ Áß 8°³(22.8%).»ó¾Ç Á¦ 2À¯±¸Ä¡´Â 33°³ Áß 22°³(66.6%)ÀÇ Ä¡¾Æ¿¡¼­ Á¦ 2±Ù½ÉÇùÃø±Ù°üÀÌ ¹ß°ßµÇ¾úÀ¸¸ç, ÀÌ´Â »ó¾Ç À¯±¸Ä¡ÀÇ ±Ù½ÉÇùÃøÄ¡±Ù ³»¿¡ µÎ °³ÀÇ ±Ù°üÀÌ Á¸ÀçÇÒ °¡´É¼ºÀÌ ³ô´Ù´Â °ÍÀ» ÀǹÌÇÑ´Ù.

In a primary teeth, dental caries is rapidly advanced the pulp disease, because the primary teeth have the thinner and the weaker enamel layer and the wider pulp chamber than relatively the permanent teeth. And the pulps of primary teeth are exposed during caries removal or even they are exposed by unexpected movement of the children or by trauma.
For successive pulp treatment in primary teeth, it is necessary to understand completely about multiple canal morphology, variation of root canal anatomy and specific problem related to root formation and resorption of primary teeth.
In upper primary molar, canal configuration of mesial root has the most variation same as upper molar. If not canal treatment is completely, most of all endodontic treatment should be failed.
In a clinical case report, upper primary molars existed persistent pain or bleeding during treatment were founded the second MB canal and were performed the endodontic treatment of theirs. As a result, the upper primary molars have no symptom and good prognosis.
In the examination of extracted upper primary molar, we found that 8 of 35 teeth(22.8%) in the upper prima-
ry first molars and 22 of 33 teeth(66.6%) in the upper primary second molar had the second mesiobuccal canal. It has revealed the high prevalence of two canals in mesiobuccal roots of upper primary molars.
The frequency of occurrence of the second mesiobuccal canal must be taken into consideration when endodon-
tic treatment is planned and as a possible cause of otherwise un explained failure.

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»ó¾Ç À¯±¸Ä¡;±Ù½ÉÇùÃøÄ¡±Ù;Á¦ 2±Ù½ÉÇùÃø°ü;Upper primary molar;Mesiobuccal root;The second mesiobuccal canal

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