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±Ý¼ÓµµÀç°üÀ¸·Î ¼öº¹µÈ Abfraction lesionÀÌ ÀÖ´Â Ä¡¾Æ¿¡ °¡ÇØÁö´Â ±³ÇÕ·ÂÀÇ ÀÀ·Â ºÐÆ÷ ºÐ¼®

Analysis of stress distribution of tooth restored with metal-ceramic crown covering abfraction lesion according to its finish line location under occlusal load

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±èÁöȯ, À±Ã¶¿í, ±èÅÂÇö, ±èÇѼº, ¿ì´ë°ï, À̱ٿì, ½ÉÁؼº,
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±èÁöȯ ( Kim Jee-Hwan ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
À±Ã¶¿í ( Yoon Chol-Wook ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
±èÅÂÇö ( Kim Tae-Hyeon ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
±èÇѼº ( Kim Han-Sung ) - ¿¬¼¼´ëÇб³ »ý¸í°øÇаú
¿ì´ë°ï ( Woo Dae-Gon ) - ½ÄÇ°ÀǾàÇ°¾ÈÀüû
À̱ٿì ( Lee Keun-Woo ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
½ÉÁؼº ( Shim June-Sung ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç

Abstract

¸ñÀû: ´Ù¾çÇÑ ¿øÀÎÀ¸·Î ¹ß»ýµÈ Abfraction º´¼Ò°¡ ÀÖ´Â Ä¡¾Æ¸¦ ±Ý¼ÓµµÀç°üÀ¸·Î ¼öº¹ ÇÒ °æ¿ì, º¯¿¬ÀÇ À§Ä¡¿¡ µû¶ó ¿¹ÈÄ°¡ ´Ù¾çÇØÁú ¼ö ÀÖ´Ù. ¼öº¹¹°ÀÇ Àå±âÀû ¼º°øÀ» °ËÁõÇϱâ À§Çؼ­´Â ÀÀ·ÂºÐÆ÷ÀÇ ºÐ¼®ÀÌ ÇÊ¿äÇÏÁö¸¸ ±Ý¼ÓµµÀç°üÀÌ abfraction º´¼ÒÀÇ ÀûÀÀÁõÀÎ °æ¿ì ±Ý¼ÓµµÀç°üÀÌ ÀÀ·Â ºÐÆ÷¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ¹àÈ÷´Â ¿¬±¸´Â ¾ÆÁ÷ ¾ø´Ù. º» ¿¬±¸ÀÇ ¸ñÀûÀº abfraction º´¼Ò°¡ ÀÖ´Â Ä¡¾Æ¸¦ ¼öº¹ÇÏ´Â ±Ý¼ÓµµÀç°üÀÌ ¹Ù¶÷Á÷ÇÑ ÀÀ·Â ºÐÆ÷¸¦ ³ªÅ¸³¾ ¼ö ÀÖ´Â Á¶°ÇÀ» ¾Ë¾Æ º¸°íÀÚ ÇÔÀÌ´Ù.

Àç·á ¹× ¹æ¹ý: Ä¡¾Æ, ÁÖÀ§ Á¶Á÷°ú ±Ý¼Ó µµÀç°üÀÇ ¿ÜÇüÀ» ¹Ý¿µÇÑ 2Â÷¿ø À¯ÇÑ ¿ä¼Ò¸ðµ¨À» Á¦ÀÛÇÏ°í 144 NÀÇ Æí½É ±³ÇÕ·Â ÇÏ¿¡¼­ÀÇ ÀÀ·ÂºÐÆ÷¸¦ À¯ÇÑ¿ä¼Ò ºÐ¼®¹ýÀ¸·Î ºÐ¼®ÇÏ¿´´Ù. ±Ý¼Ó µµÀç°üÀÇ º¯¿¬ À§Ä¡¸¦ ½û±â¸ð¾çÀÇ °á¼ÕºÎÀÇ ÇÏ¿¬¿¡(Group 0), ±×¸®°í °á¼ÕºÎÀÇ ÇÏ¿¬º¸´Ù 1 mm ÇϹæ(Group 1)°ú 2 mm ÇϹæ(Group2)¿¡ À§Ä¡½ÃÄ×´Ù.

°á°ú: Group 0¿¡¼­ von Mises stress´Â ±Ý¼Ó µµÀç°üÀÇ º¯¿¬°ú °á¼ÕºÎÀÇ Ã·ºÎ¿¡ ÁýÁß µÇ¾ú°í ÇùÃø º¯¿¬ÀÇ ÀÀ·ÂÀº ¼³Ãø ºÎÀ§·Î ºÐÆ÷µÇ¾ú´Ù. Group 1°ú Group 2¿¡¼­ÀÇ ÀÀ·ÂºÐÆ÷¾ç»óÀº ºñ½ÁÇÏ°Ô ³ªÅ¸³µ´Ù. ÀÀ·ÂÀº °á¼ÕºÎÀÇ Ã·ºÎ¿¡ ÁýÁßµÇÁö¸¸ ÇùÃø°ú ¼³ÃøÀÇ ÀÀ·Â¶ì´Â ¼­·Î ºÐ¸®µÈ ¾ç»óÀ¸·Î ³ªÅ¸³µ´Ù.

°á·Ð: ±Ý¼ÓµµÀç°üÀÇ º¯¿¬À» Abfraction º´¼ÒÀÇ ÇÏ¿¬¿¡ ¼³Á¤ÇÒ °æ¿ì, ±Ý¼ÓµµÀç°üÀº Abfraction º´¼ÒÀÇ Ã·ºÎ¿¡ ÀÀ·ÂÀ» ÁýÁß½ÃŲ´Ù.

PURPOSE. When the full veneer crown was treated in the tooth with abfraction lesion due to various causes, the prognosis of it may be compromised according to the location of the finish line, but there is few study about the location of its buccal finish line. The purpose of this study was to investigate the effect of location of the finish line of the full veneer crown on stress distribution of the tooth with abfraction lesion.

MATERIALS AND METHODS. The two dimensional finite element model was developed to express tooth, surrounding tissue and full veneer crown. The stress distribution under eccentric 144 N occlusal load was analyzed using finite element analysis. The location of finish line was set just at the lower border of the lesion (Group 0), 1 mm (Group 1) and 2 mm (Group 2) below the lower border of the lesion.

RESULTS. In the Group 0, von Mises stress was concentrated at the finish line and the apex of the lesion. Also, the stress at the bucal finish line propagated to the lingual side. In the Group 1 and Group 2, stress distribution was similar each other. Stress was concentrated at the apex of lesion, but the stress at the buccal finish line did not propagate to the lingual side. That implied decrease of the possibility of horizontal crown fracture.

CONCLUSION. Full veneer crown alleviated the stress concentrated at the apex of the abfraction lesion, when the finish line of full veneer crown was set below the lower border of abfraction lesion.

Å°¿öµå

Abfraction; ±Ý¼Ó µµÀç°ü; º¯¿¬; ÀÀ·ÂºÐÆ÷; À¯ÇÑ ¿ä¼Ò ºÐ¼®¹ý
Abfraction; Metal-ceramic crown; Finish line; Stress distribution; Finite element analysis

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