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SLUMPING TENDENCY AND RHEOLOGICAL PROPERTY OF FLOWABLE COMPOSITES

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¹Î¼±È« ( Min Sun-Hong ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Á¸Çб³½Ç
±è¼±¿µ ( Kim Sun-Young ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Á¸Çб³½Ç
Á¶º´ÈÆ ( Cho Byung-Hoon ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Á¸Çб³½Ç
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Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº flowable º¹ÇÕ·¹ÁøÀÇ Á¶ÀÛ¼º°ú Å« ¿¬°üÀÌ ÀÖ´Â slumping °æÇâÀ» ÃøÁ¤ÇÏ´Â ¹æ¹ýÀ» Á¦½ÃÇÏ°í ÀÌ¿Í °ü·ÃÀÌ ÀÖ´Â º¹ÇÕ·¹ÁøÀÇ À¯º¯ÇÐÀû Ư¼ºÀ» °íÂûÇÏ¿´´Ù. 5 Á¾ÀÇ flowable º¹ÇÕ·¹Áø (Aelitefil flow:AF, Filtek flow:FF, DenFil flow:DF, Tetric flow:TF and Revolution:RV)ÀÌ »ç¿ëµÇ¾ú´Ù. ÁÖ»ç±â¿¡ ´ã±ä ÀÏÁ¤·®ÀÇ º¹ÇÕ·¹ÁøÀ» ÀÏÁ¤ ÇÑ ¼Óµµ·Î °¡¾ÐÇÒ ¼ö ÀÖ´Â ÀåÄ¡¸¦ ÀÌ¿ëÇÏ¿© ½½¶óÀ̵å±Û¶ó½º À§¿¡ »çÃâ ÇÑ ÈÄ 25¡ÉÀÇ ½Ç¿Â¿¡¼­ 10 ÃÊ µ¿¾È slumpingÀÌ ÀϾµµ·Ï ¹æÄ¡ÇÑ ÈÄ ±¤ÁßÇÕ ÇÏ¿´´Ù. º¹ÇÕ·¹ÁøÀÇ slumping°æÇâÀ» Æò°¡Çϱâ À§ÇØ ¿ø»Ô Çü ȤÀº µ¿ÇüÀ¸·Î °æÈ­µÈ ½ÃÆíÀÇ aspect ratio (¹Ø¸éÀÇ Áö¸§¿¡ ´ëÇÑ ³ôÀÌÀÇ ºñ)¸¦ ±¸ÇÏ¿´´Ù. Slumping °æÇâ°ú º¹ÇÕ·¹ÁøÀÇ À¯º¯ÇÐÀû ¼ºÁú°úÀÇ °ü·Ã¼ºÀ» ¾Ë¾Æº¸±â À§ÇØ Rheometer¸¦ »ç¿ëÇÏ¿© °¢Áøµ¿¼ö ¥ø=0.1-100 rad/sÀÇ ¹üÀ§¿¡¼­ µ¿ÀûÁøµ¿Àü´Ü½ÃÇèÀ» ½ÃÇàÇÏ¿© º¹ÇÕ·¹ÁøÀÇ º¹¼ÒÁ¡µµ¸¦ ±¸ÇÏ¿´´Ù. º¹ÇÕ·¹ÁøÀÇ slumping°æÇâÀ» ºñ±³Çϱâ À§ÇØ ÀÏ¿øºÐ»êºÐ¼® ¹× Turkey¡¯s post test¸¦ ½ÃÇàÇÏ¿´°í (¥á<0.05), º¹¼ÒÁ¡µµ¿Í aspect ratio»çÀÌÀÇ °ü·Ã¼ºÀ» ¾Ë¾Æº¸±â À§ÇØ È¸±ÍºÐ¼®À» ½ÃÇàÇÏ¿´´Ù °á°ú´Â ´ÙÀ½°ú °°´Ù. 1. Slumping ÈÄ aspect ratio¸¦ ÃøÁ¤ÇÏ¿© ºñ±³ÇÑ flowable º¹ÇÕ·¹ÁøÀÇ slumping °æÇâÀº Á¦Ç°¿¡ µû¶ó Å« Â÷À̸¦ º¸¿´´Ù. (AF

The aim of this study was to develop a method for measuring the slumping resistance of flowable resin composites and to evaluate the efficacy using rheological methodology. Five commercial flowable composites (Aelitefil flow:AF, Filtek flow:FF, DenFil flow:DF, Tetric flow:TF and Revolution:RV) were used. Same volume of composites in a syringe was extruded on a glass slide using a custom-made loading device. The resin composites were allowed to slump for 10 seconds at 25¡É and light cured. The aspect ratio (height/diameter) of cone or dome shaped specimen was measured for estimating the slumping tendency of composites. The complex viscosity of each composite was measured by a dynamic oscillatory shear test as a function of angular frequency using a rheometer. To compare the slumping tendency of composites, one way-ANOVA and Turkey¡¯s post hoc test was performed for the aspect ratio at 95% confidence level. Regression analysis was performed to investigate the relationship between the complex viscosity and the aspect ratio. The results were as follows. 1. Slumping tendency based on the aspect ratio varied among the five materials (AF

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slumping °æÇâ;À¯º¯ÇÐÀû Ư¼º;flowable º¹ÇÕ·¹Áø;º¹¼ÒÁ¡µµ;µ¿ÀûÀü´Ü½ÃÇè
Slumping tendency;Rheological property;Flowable composite;Complex viscosity;Dynamic oscillatory shear test

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