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Micro-CT Evaluation of Stainless Steel Crowns on Extracted Primary Molars

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¼Ò¼Ó »ó¼¼Á¤º¸
Á¤º¸¶÷ ( Jung Bo-Ram ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
½ÅÁ¾Çö ( Shin Jong-Hyun ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
Á¤¼ºÈñ ( Jeong Sung-Hee ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
±èÁö¿¬ ( Kim Ji-Yeon ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
±è½Å ( Kim Shin ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

¼Ò¾ÆÄ¡°ú ÀÓ»ó¿¡¼­ ±â¼º±Ý¼Ó°ü ¼öº¹Àº ¸Å¿ì ³ôÀº È°¿ë¼º°ú »ç¿ëºóµµ¿¡µµ ºÒ±¸ÇÏ°í ¿Ïº®ÇÏ°í Á¤¹ÐÇÑ ¼öº¹ÀÌ ½±Áö ¾ÊÀº Ç׸ñÀ¸·Î ÆǴܵȴÙ. ºÒ·®ÇÑ º¯¿¬ ÀûÇÕ, º¯¿¬ºÎ Ä¡Å ħÂø, ÀÎÁ¢ ¿µ±¸Ä¡ÀÇ ¸ÍÃâ Àå¾Ö, Á¢ÂøÁ¦ ¼Ò½Ç ¹× ÀÌÂ÷ ¿ì½Ä, ºÎÀûÀýÇÑ Áö´ëÄ¡ »èÁ¦, ±³ÇÕ¸é õ°ø µîÀÌ ÀÓ»óÀûÀ¸·Î ÈçÈ÷ °üÂûµÇ´Â ¹®Á¦Á¡µéÀÌ´Ù. º» ¿¬±¸´Â ±â¼º±Ý¼Ó°üÀÌ ÀåÂøµÈ »óÅ·Π¹ßÄ¡µÈ À¯±¸Ä¡¸¦ ´ë»óÀ¸·Î ¼öº¹ »óŸ¦ Æò°¡ÇØ º½À¸·Î½á, ºó¹øÇÑ °áÇÔ°ú Âø¿ÀµéÀ» ã¾Æ³¾ ¸ñÀûÀ¸·Î ½ÃµµµÇ¾ú´Ù. ºÎ»ê´ëÇб³ Ä¡°úº´¿ø ¼Ò¾ÆÄ¡°ú¿¡¼­ ¹ßÄ¡µÈ ±â¼º±Ý¼Ó°ü ¼öº¹ À¯±¸Ä¡ 97°³¸¦ ´ë»óÀ¸·Î À°¾ÈÀû Æò°¡¿Í micro-computed tomography(micro-CT) ¿µ»óÀ» ºÐ¼®ÇÏ¿´´Ù. º¯¿¬ ÀûÇÕµµ, Á¢ÂøÁ¦ ¼Ò½Ç, ÀÌÂ÷¿ì½Ä, ±³¸ð¼º õ°ø, º¯¿¬ºÎ ¿¬¸¶ °áÇÔ, ¼±¹Ý(ledge) Çü¼º µîÀÇ Ç׸ñÀ¸·Î ¼öº¹ »óŸ¦ Æò°¡ÇÏ¿©, ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù. Á¶»çÇ׸ñµéÀ» ´ë»óÄ¡¾Æ ±âÁØÀ¸·Î º¸¾ÒÀ» ¶§, Á¢ÂøÁ¦ ¼Ò½ÇÀÌ °¡Àå ºó¹øÇÏ¿´À¸¸ç(98%), µÚ¸¦ À̾î ÀÌÂ÷¿ì½Ä(42.3%), º¯¿¬ºÎ ¿¬¸¶ °áÇÔ(41.2%), ¼±¹Ý(ledge) Çü¼º(29.9%), ±³¸ð¼º õ°ø(17.5%)ÀÇ ¼øÀ¸·Î ³ªÅ¸³µ´Ù. º¯¿¬ °£°ÝÀÌ Å¬¼ö·Ï Á¢ÂøÁ¦ ¼Ò½ÇÀÌ Áõ°¡ÇÏ´Â °æÇâÀ» º¸¿´°í, Á¢ÂøÀç ¼Ò½ÇÀº º¯¿¬ °£°Ý ¹× ÀÌÂ÷ ¿ì½Ä°ú À¯ÀÇÇÑ »ó°ü¼ºÀ» º¸¿´´Ù. Æò±Õ º¯¿¬°£°ÝÀº 0.31 ¡¾ 0.26 mm ¿´À¸¸ç, »ó¾Ç Á¦2 À¯±¸Ä¡¿¡¼­ °¡Àå Å©°Ô ³ªÅ¸³µ´Ù. º¯¿¬ÀÌ ¹é¾Ç¹ý¶û°æ°è »ó¹æ¿¡ À§Ä¡ÇÏ´Â °æ¿ì°¡ °¡Àå ¸¹¾Ò°í, º¯¿¬ÀÌ Ä¡°ü »ó¹æ¿¡ À§Ä¡ÇÒ¼ö·Ï º¯¿¬ °£°ÝÀº ÀÛ°Ô ³ªÅ¸³µ´Ù(p< 0.05).

This study was conducted for the purpose of evaluating the stainless steel crowns on extracted primary molars and thus identifying frequent errors and defects. Visual assessment and micro-computed tomography (micro-CT) image analysis were performed on 97 primary molars for evaluation of the state of marginal adaptation, cement loss, secondary caries, ledge formation, attritive perforation and marginal polishing defect. The results were as follows: In the examination of object teeth by evaluation criteria, cement loss was found most frequently (98%), followed by secondary caries (42.3%), marginal polishing defect (41.2%), ledge formation (29.9%) and attritive perforation (17.5%), in this order. The cement loss at the margins showed a significant relationship with marginal gap and secondary caries: the larger the marginal gap is, the more frequent is the cement loss (p< 0.05). The average marginal gap was 0.31 ¡¾ 0.26 mm and showed the highest value in the maxillary 2nd primary molars. The location of the crown margin above the cementoenamel junction was found most frequently and it was found that the higher the crown margin is located, the less the marginal gap becomes (p< 0.05). In conclusion, it is thought very desirable to pay closer attention to crown margins and shapes for stainless steel crown restoration in order to minimize the marginal gaps and consequent cement loss.

Å°¿öµå

±â¼º±Ý¼Ó°ü; Micro CT; À¯±¸Ä¡
Stainless steel crown; Micro CT; Primary molar

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