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EFFECT OF RESTORATION TYPE ON THE STRESS DISTRIBUTION OF ENDODONTICALLY TREATED MAXILLARY PREMOLARS; THREE-DIMENSIONAL FINITE ELEMENT STUDY

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Á¤Çö¼÷ ( Jung Heun-Sook ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
±èÇöö ( Kim Hyeon-Cheol ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Á¸Çб³½Ç
Ç㺹 ( Hur Bock ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
±è±¤ÈÆ ( Kim Kwang-Hoon ) - ºÎ»ê´ëÇб³ °ø°ú´ëÇÐ ±â°è¼³°è°øÇаú
¼Õ±Ç ( Son Kwon ) - ºÎ»ê´ëÇб³ °ø°ú´ëÇÐ ±â°è¼³°è°øÇаú
¹ÚÁ¤±æ ( Park Jeong-Kil ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº ´Ù¾çÇÑ ±³ÇÕÇÏÁß Á¶°ÇÇÏ¿¡¼­ ¾Æ¸»°¨, º¹ÇÕ·¹Áø, ¼¼¶ó¹Í Àη¹ÀÌ, ±×¸®°í ±Ý Àη¹ÀÌ·Î ¼öº¹ÇÑ ±Ù°üÄ¡·áµÈ »ó¾Ç Á¦2¼Ò±¸Ä¡ÀÇ À½·ÂºÐÆ÷¸¦ 3Â÷¿ø À¯ÇÑ¿ä¼Ò¹ýÀ¸·Î ºÐ¼®ÇÏ´Â °ÍÀÌ´Ù. ¹ßÄ¡µÈ »ó¾Ç Á¦2¼Ò±¸Ä¡¸¦ ÀÌ¿ëÇÏ¿© ±Ù°üÄ¡·áµÈ 3Â÷¿ø À¯ÇÑ¿ä¼Ò¸ðÇüÀ» Á¦ÀÛÇÏ¿´´Ù. Á¦ÀÛµÈ ¼Ò±¸Ä¡ ¸ðÇüÀÇ ±Ù°ü¿Íµ¿À» À§ 4°¡Áö Àç·á·Î °¢°¢ ¼öº¹ÇÑ ÈÄ, ÇùÃø±³µÎ (Load-1) ¶Ç´Â ¼³Ãø±³µÎ (Load-2)¿¡ 500 NÀÇ ÇÏÁßÀ», ¼³Ãø±³µÎ¿Í ±Ù½Éº¯¿¬¿¡ ÃÑ 170 NÀÇ ÇÏÁß (Load-3)À» °¡ÇÏ¿´´Ù. ¼¼ °¡ÁöÀÇ ÇÏÁßÁ¶°Ç ÇÏ¿¡¼­ °¢ ¼öº¹¹°¿¡ µû¸¥ ÇùÃø°ú ¼³ÃøÀÇ Ä¡°æºÎ ±×¸®°í ±³ÇÕ¸éÀÇ Á¤Áß±¸¿¡¼­ ³ªÅ¸³ª´Â ÀÎÀåÀÀ·ÂÀÇ ºÐÆ÷¾ç»óÀ» ANSYS ÇÁ·Î±×·¥À¸·Î ºÐ¼®ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù. 1. ¸ðµç ¼öº¹¹°ÀÇ °æ¿ì¿¡¼­ Load-1¿¡¼­´Â ¼³ÃøÀÇ Ä¡°æºÎ, Load-2¿¡¼­´Â ÇùÃøÀÇ Ä¡°æºÎ¿¡¼­ ³ôÀº ÀÀ·ÂÀÌ °üÂûµÇ¾ú°í ¼öº¹¹° Á¾·ù¿¡ µû¸¥ Â÷ÀÌ´Â °üÂûµÇÁö ¾Ê¾Ò´Ù. 2. ¸ðµç ¼öº¹¹°ÀÇ °æ¿ì¿¡¼­ ±³ÇÕ¸éÀÇ ÇÏÁßÁ¡ ±Ùó ¿ÍÁ¤Áß±¸¸¦ µû¶ó ³ôÀº ÀÀ·ÂÀÌ °üÂûµÇ¾ú°í ¼öº¹¹° Á¾·ù¿¡ µû¶ó ¾à°£ÀÇ Â÷ÀÌ°¡ °üÂûµÇ¾ú´Ù. 3. ¸ðµç ¼öº¹¹°ÀÇ °æ¿ì¿¡¼­ Load-3¿¡¼­´Â ÇÏÁßÁ¡ ±Ùó¿¡¼­ ³ôÀº ÀÀ·ÂÀÌ °üÂûµÇ¾ú°í ¼öº¹¹° Á¾·ù¿¡ µû¸¥ Â÷ÀÌ´Â °üÂûµÇÁö ¾Ê¾Ò´Ù.

The purpose of this study was to investigate the effects of four restorative materials under various occlusal loading conditions on the stress distribution at the CEJ of buccal. palatal surface and central groove of occlusal surface of endodontically treated maxillary second premolar, using a 3D finte element analysis. A 3D finite element model of human maxillary second premolar was endodontically treated. After endodontic treatment, access cavity was filled with Amalgam, resin, ceramic or gold of different mechanical properties. A static 500N forces were applied at the buccal (Load-1) and palatal cusp (Load-2) and a static 170N forces were applied at the mesial marginal ridge and palatal cusp simultaneously as centric occlusion (Load-3). Under 3-type Loading condition, the value of tensile stress was analyzed after 4-type restoration at the CEJ of buccal and palatal surface and central groove of occlusal surface Excessive high tensile stresses were observed along the palatal CEJ in Load-1 case and buccal CEJ in Load-2 in all of the restorations. There was no difference in magnitude of stress in relation to the type of restorations. Heavy tensile stress concentrations were observed around the loading point and along the central groove of occlusal surface in all of the restorations. There was slight difference in magnitude of stress between different types of restorations. High tensile stress concentrations around the loading points were observed and there was no difference in magnitude of stress between different types of restorations in Load-3.

Å°¿öµå

ÀÀ·ÂºÐÆ÷;À¯ÇÑ¿ä¼ÒºÐ¼®¹ý;±Ù°üÄ¡·áµÈ Ä¡¾Æ;¼öº¹Àç·á;±³ÇÕ·Â
Stress distribution;Finite element analysis;Endodontically treated teeth;Restorative material;Occlusal loading

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