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A Radiographic Study Of Differential Diagnosis Between Dentigerous Cysts And Unicystic Ameloblastomas

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Abstract

ÀúÀÚµéÀº ÇϾÇÀÇ ¸Åº¹±¸Ä¡¿Í °ü·ÃµÈ ´Ü¹æ¼ºÀÇ Ä¡°üºÎ ¹æ»ç¼±Åõ°ú»óÀ» ³ªÅ¸³»´Â º´¼Òµé Áß
¿¡¼­ Àӻ󡤹æ»ç¼±ÇÐÀû ¹× Á¶Á÷ º´¸®ÇÐÀûÀ¸·Î ÇÔÄ¡¼º³¶Á¾°ú ´Ü¹æ¼º ¹ý¶û¸ð¼¼Æ÷Á¾À¸·Î Áø´Ü
µÈ Áõ·ÊµéÀÇ °¨º°¿ä°ÇÀ» ¹æ»ç¼±ÇÐÀûÀ¸·Î ¿¬±¸ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ÇÔÄ¡¼º ³¶Á¾Àº 20´ë¿¡¼­, ´Ü¹æ¼º ¹ý¶û¸ð¼¼Æ÷Á¾Àº 10´ë¿¡¼­ °¡Àå È£¹ßµÇ¾ú°í µÎ Áúȯ ¸ð
µÎ ³²¼º¿¡¼­ ´Ù¼Ò ¸¹¾Ò´Ù
2. º´¼ÒÀÇ Å©±â´Â ÇÔÄ¡¼º³¶Á¾¿¡ ºñÇØ ´Ü¹æ¼º ¹ý¶û¸ð¼¼Æ÷Á¾¿¡¼­ ´õ Å« °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç,
ÇÔÄ¡¼º³¶Á¾¿¡¼­´Â º´¼ÒÀÇ ¸éÀûÀÌ 25§² ÀÌ»óÀÎ °æ¿ì´Â °üÂûµÇÁö ¾Ê¾Ò´Ù.
3. ÇÇÁú°ñÀÇ ºñ¹Ú°ú ÆØÀ¶Àº ÇÔÄ¡¼º³¶Á¾ÀÇ °æ¿ì 15.8%¿¡¼­, ´Ü¹æ¼º ¹ý¶û¸ð¼¼Æ÷Á¾ÀÇ °æ¿ì
72.9%¿¡¼­ °üÂûµÇ¾úÀ¸¸ç º´¼ÒÀÇ º¯¿¬Àº ÇÔÄ¡¼º³¶Á¾¿¡¼­ ÆòÈ°ÇÑ º¯¿¬ÀÎ °æ¿ì°¡ 89.5%·Î¼­
´ëºÎºÐÀ̾ú°í, ´Ü¹æ¼º ¹ý¶û¸ð¼¼Æ÷Á¾¿¡¼­ ´Â ÆòÈ°ÇÑ º¯¿¬ÀÎ °æ¿ì°¡ 53.1%, ±¼°îµÈ º¯¿¬ÀÎ °æ
¿ì°¡ 46.9%¿´´Ù.
4. ÁÖº¯ Á¤»ó°ñÁ¶Á÷°úÀÇ °æ°è´Â ÇÔÄ¡¼º³¶Á¾¿¡¼­ ºÐ¸íÇÑ °ñ°æÈ­ °æ°è·Î ³ªÅ¸³­ °æ¿ì°¡
81.6%·Î °¡Àå ¸¹¾Ò°í, ´Ü¹æ¼º ¹ý¶û¸ð¼¼Æ÷Á¾¿¡¼­´Â ºÐ¸íÇÑ °ñ°æÈ­ °æ°è·Î ³ªÅ¸³­ °æ¿ì°¡
53.1%, ¾î´À Á¤µµ º´¼Ò¸¦ ±¸ºÐÇÒ ¼ö ÀÖ´Â °æ¿ì°¡ 46.9%¿´´Ù.
5. º´¼Ò¿Í °ü·ÃµÈ Ä¡¾Æ´Â µÎ Áúȯ ¸ðµÎ ÇÏ¾Ç Á¦3 ´ë±¸Ä¡°¡ °¡Àå ¸¹¾ÒÀ¸¸ç, ¹é¾Ç¡¤¹ý¶ûÁú
°æ°èºÎ¿Í º´¼ÒÀÇ Ä¡¾ÆºÎÂøºÎ »çÀÌÀÇ Æò±Õ°£°ÝÀº ÇÔÄ¡¼º³¶Á¾¿¡ ºñÇØ ´Ü¹æ¼º ¹ý¶û¸ð¼¼Æ÷Á¾¿¡
¼­ Å« °ÍÀ¸·Î ³ªÅ¸³µ°í, º´¼Ò¿Í °ü·ÃµÈ Ä¡¾ÆÀÇ Ä¡±Ù Çü¼ºÀÌ ¿Ï·áµÇÁö ¾ÊÀº °æ¿ì¿¡´Â µÎ º´
¼Ò ¸ðµÎ¿¡¼­ Ä¡±ÙÀÇ Çü¼ºÀÌ ¹Ý´ëÃø¿¡ ºñÇØ Áö¿¬µÈ Áõ·Ê°¡ ¸¹¾Ò°í, ÇÔÄ¡¼º³¶Á¾¿¡ ºñÇØ ´Ü¹æ
¼º ¹ý¶û¸ð¼¼Æ÷Á¾¿¡¼­ º´¼Ò¿Í °ü·ÃµÈ Ä¡¾ÆÀÇ ÀüÀ§°¡ ½ÉÇß´Ù.
6. º´¼Ò³»ºÎÀÇ ¹æ»ç¼±Åõ°ú»óÀº ÇÔÄ¡¼º³¶Á¾ÀÇ 89.5%¿¡¼­ ±ÕÀÏÇÏ°Ô ³ªÅ¸³µÀ¸¸ç, ´Ü¹æ¼º ¹ý
¶û¸ð¼¼Æ÷Á¾¿¡¼­´Â 46.9%¿¡¼­ ±ÕÀÏÇÏ°Ô ³ªÅ¸³µ°í 53.1%¿¡¼­ ±ÕÀÏÇÏÁö ¾ÊÀº °ÍÀ¸·Î ³ªÅ¸³µ
´Ù.
7. º´¼Ò¿¡ ÀÎÁ¢ÇÑ Ä¡±ÙÀÇ Èí¼ö»óÀº ÇÔÄ¡¼º³¶Á¾ÀÇ 15.8%¿¡¼­ °üÂûµÇ¾úÀ¸³ª ´Ü¹æ¼º ¹ý¶û¸ð
¼¼Æ÷Á¾¿¡¼­´Â 65.2%¿¡¼­ °üÂûµÇ¾úÀ¸¸ç, º´¼Ò¿¡ ÀÎÁ¢ÇÑ ÇϾǰüÀÇ ÀüÀ§µµ ÇÔÄ¡¼º³¶Á¾ÀÇ
38.1%¿¡¼­ °üÂûµÇ¾úÀ¸³ª ´Ü¹æ¼º ¹ý¶û¸ð¼¼Æ÷Á¾¿¡¼­´Â 61.5%¿¡¼­ °üÂûµÇ¾ú´Ù.
#ÃÊ·Ï#
The purpose of this study was to obtain some informations for the radiographic
differential diagnosis between dentigerous cysts and unicystic ameloblastomas in the
mandible.
The authors observed and compared the clinico-radiographic features of 38 cases of
dentigerous cyst and 32 cases of unicystic ameloblastoma associated with impacted
mandibular molar.
The obtained results were as follows
Dentigerous cysts occurred the most frequently in the 3rd decade, but unicystic
ameloblastomas in the 2nd decade, and both lesions occurred with slight predilection in
males.
Average of lesional size of unicystic ameloblastomas was larger than that of
dentigerous cysts, and lesions of over 25§² were only in unicystic ameloblastomas.
Cortical thinning and expansion were more frequently observed in unicystic
ameloblastomas at 72.9% than in dentigemus cysts at 15.8%.
Dentigerous cysts showed smooth border at 89.5%, but unicystic ameloblastomas
showed smooth border at 53.1% and scalloped border at 46.9%.
Dentigerous cysts showed well-defined outline at 81.6%, but unicystic ameloblastomas
showed well-defined outline at 53.1% and moderate-defined outline at 46.9%.
In both lesions, the mandibular 3rd molar was the most frequent causative tooth.
Average of distance between the cemento-enamel junction and lesional wtih attachment
of the causative tooth was longer in unicystic ameloblastomas than in dentigerous cysts.
Severe displacement of causative tooth was more frequent in unicystic ameloblastomas
at 62.5% than in dentigerous cysts at 23.7%.
Dentigerous cysts showed homogeneous lesional radiolucency at 89.5%, but unicystic
ameloblastomas showed inhomogeneous lesional radiolucency at 53.1%.
Root resorption of adjacent tooth and displacement of mandibular canal were more
frequent in unicystic ameloblastomas at 65.2% and 61.5% than in dentigerous cysts at
15.8% and 38.1% respectively.

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