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º¸Ã¶¹° º¯¿¬ÀÇ À§Ä¡°¡ abfractionµÈ Ä¡¾ÆÀÇ ÀÀ·Â ºÐÆ÷¿¡ ¹ÌÄ¡´Â ¿µÇâ¿¡ ´ëÇÑ À¯ÇÑ¿ä¼Ò¹ýÀû ºÐ¼®

Effect of the marginal position of prosthesis on stress distribution of teeth with abfraction lesion using finite element analysis

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±è¸íÇö ( Kim Myeong-Hyeon ) - °æºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Ã¶Çб³½Ç
ÀÌûÈñ ( Lee Cheong-Hee ) - °æºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Ã¶Çб³½Ç

Abstract

¸ñÀû: ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº abfractionº´¼Ò°¡ ÀÖ´Â ±Ý¼ÓµµÀç°ü¼öº¹ Ä¡¾Æ¸¦ ¼öº¹Çϰųª ÇÏÁö ¾ÊÀ» ¶§ ³ªÅ¸³ª´Â ÀÀ·ÂÁýÁß°ú ºÐÆ÷¸¦ À¯ÇÑ¿ä¼ÒºÐ¼®À¸·Î Æò°¡ÇÏ´Â °ÍÀÌ´Ù.

Àç·á ¹× ¹æ¹ý: »ó¾Ç Á¦1 ¼Ò±¸Ä¡¸¦ ¼±Á¤ÇÏ¿© ÃÑ 10°³ÀÇ À¯ÇÑ¿ä¼Ò¸ðµ¨À» ¸¸µé¾ú´Ù. ¸ðµ¨ 1Àº ÀÚ¿¬Ä¡; ¸ðµ¨ 2´Â ÇùÃø°ú±¸°³Ãø ¹é¾Ç¹ý¶û°æ°è »ó¹æ 2 mm¿¡ º¯¿¬ÀÌ À§Ä¡ÇÑ ±Ý¼ÓµµÀç°ü; ¸ðµ¨ 3Àº ÇùÃø°ú±¸°³Ãø ¹é¾Ç¹ý¶û°æ°è¿¡ º¯¿¬ÀÌ À§Ä¡ÇÑ ±Ý¼ÓµµÀç°ü; ¸ðµ¨ 4´Â abfractionº´¼Ò¸¦ °¡Áø ÀÚ¿¬Ä¡; ¸ðµ¨ 5¿Í 6Àº ´Ù¸¥ Á¶°ÇÀº °¢°¢ ¸ðµ¨ 2¿Í 3°ú µ¿ÀÏÇϸ鼭 abfractionº´¼Ò¸¦ °¡Áø Ä¡¾Æ; ¸ðµ¨ 7Àº abfractionº´¼Ò¸¦ °¡Áö°í composite resinÀ¸·Î ¼öº¹µÈ ÀÚ¿¬Ä¡;¸ðµ¨ 8°ú 9´Â °¢°¢ ¸ðµ¨ 5¿Í 6°ú µ¿ÀÏÇÑ ¸ðµ¨¿¡ abfractionº´¼Ò¸¦ composite resinÀ¸·Î ¼öº¹ÇÑ ÈÄ ±Ý¼ÓµµÀç°ü ÀåÂøÇÑ Ä¡¾Æ; ¸ðµ¨ 10Àº composite resinÀ¸·Î abfraction lesionÀ» ¼öº¹ÇÏ°í ±Ý¼ÓµµÀç°üÀǺ¯¿¬À» abfractionº´¼Òº¸´Ù ÇϹ濡 À§Ä¡½ÃŲ Ä¡¾Æ¿´´Ù. À§Ä¡¸¦ ¼­·Î ´Þ¸®ÇÑ ÇÏÁß load A¿Í load B¸¦ °¡ÇÏ¿©, °¢ ±âÁØÁ¡¿¡¼­ÀÇ von Mises stress°ªµéÀ» ÃøÁ¤ÇÏ¿© ºñ±³ÇÏ¿´´Ù.

°á°ú: Abfractionº´¼Ò°¡ ÀÖ´Â Ä¡¾Æ¿¡ load A ¶Ç´Â load B¸¦ ÁÖ¾úÀ» ¶§, ÀÀ·ÂÀº lesionÀÇ apex¿¡ ÁýÁߵǾú´Ù. ¹Ý¸é, abfractionº´¼Ò¸¦ composite resinÀ¸·Î ÃæÀüÇÑ Ä¡¾Æ¿¡ load A ¶Ç´Â load B¸¦ ÁÖ¾úÀ» ¶§ ÀÀ·Â°ªÀº apex¿¡¼­ °¨¼ÒÇÏ¿´´Ù.

°á·Ð:AbfractionÀÌ ÀÖ´Â Ä¡¾Æ´Â º¹ÇÕ ·¹ÁøÀ¸·Î ¼öº¹ÇØÁÖ´Â °ÍÀÌ ÀÀ·ÂÀÇ ÁýÁßÀ» ÁÙ¿©¼­ º´¼ÒÀÇ ¿¹ÈÄ¿¡ À¯¸®ÇÑ °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç, AbfractionÀÌ ¹ß»ýµÈ Ä¡¾Æ¸¦ ±Ý¼Ó µµÀç°üÀ¸·Î ¼öº¹ÇÒ °æ¿ì ÇùÃøº¯¿¬À» ¹ý¶ûÁú »ó¿¡ À§Ä¡½ÃÅ°´Â °ÍÀÌ À¯¸®ÇÏ¿´´Ù.

PURPOSE. The aim of this study was to evaluate the stress concentration and distribution whether restoring the cavity or not while restoring with metal ceramic crown on tooth with abfraction lesion using finite element analysis.

MATERIALS AND METHODS. Maxillary first premolar was selected and made a total of 10 finite element model. Model 1 was natural tooth; Model 2 was tooth with metal ceramic crown restoration which margin was positioned above 2 mm from CEJ; Model 3 was tooth with metal ceramic crown restoration which margin was positioned on CEJ; Model 4 was natural tooth which has abfraction lesion; Model 5 and 6 had abfraction lesion and the other condition was same as model 2 and 3, respectively; Model 7 was natural tooth which had abfraction lesion restored with composite resin; Model 8 and 9 was tooth with metal ceramic crown after restoring on abfraction lesion with composite resin; Model 10 was restored tooth on abfraction lesion with composite resin and metal ceramic crown restoration which margin is positioned on lower border of abfraction lesion. Load A and Load B was also designed. Von Mises value was evaluated on each point.

RESULTS. Under load A or load B, on tooth with abfraction lesion, stress was concentrated on the apex of lesion. Under load A or load B, on tooth that abfraction lesion was restored with composite resin, the stress value was reduced on the apex.

CONCLUSION. In case of abfraction lesion was restored with composite resin, the stress was concentrated on the apical border of restored cavity regardless of marginal position. It was favorable to place crown margin on the enamel for restoring with metal ceramic crown.

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Dental stress analysis; Finite element analysis

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