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THE BONDING DURABILITY OF TOTAL ETCHING ADHESIVES ON DENTIN

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Á¤¹Ì¶ó ( Jung Mi-Ra ) - °æÈñ´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú Ä¡°úº¸Á¸Çб³½Ç
ÃÖ±â¿î ( Choi Gi-Woon ) - °æÈñ´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú Ä¡°úº¸Á¸Çб³½Ç
¹Ú»óÇõ ( Park Sang-Hyuk ) - °æÈñ´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú Ä¡°úº¸Á¸Çб³½Ç
¹Ú»óÁø ( Park Sang-Jin ) - °æÈñ´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú Ä¡°úº¸Á¸Çб³½Ç

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº 3Á¾ÀÇ Àüü»êºÎ½Ä »ó¾ÆÁú Á¢Âø ½Ã½ºÅÛ¿¡¼­ ÀûÀýÇÑ »êºÎ½Ä ½Ã°£°ú Á¢ÂøÁ¦ÀÇ Ä§Åõ ´É·Â¿¡ ´ëÇØ ±Ô¸íÇÏ°íÀÚ ÇÏ¿´´Ù. ¿ì½ÄÀÌ ¾ø´Â 54°³ÀÇ Á¦3´ë±¸Ä¡ÀÇ »ó¾ÆÁú Ç¥¸éÀ» 5, 15, 25ÃÊ µ¿¾È »êºÎ½ÄÇÏ°í »êºÎ½ÄÇü Á¢ÂøÁ¦ 3Á¾ (Scotchbond multipurpose, Single Bond, One Step) À» µµÆ÷ÇÑ ÈÄ º¹ÇÕ·¹ÁøÀ» ÃæÀüÇÏ¿´´Ù. °¢ ½ÃÆíÀº 0ȸ (´ëÁ¶±º) ¶Ç´Â 2000ȸ ¿­¼øȯ ($5^{\circ}C\;-\;55^{\circ}C$) (½ÇÇ豺) ÈÄ ¹Ì¼¼ÀÎÀå°­µµ¸¦ ÃøÁ¤ÇÏ°í ÆĴܸéÀ» °üÂûÇÏ¿© ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù. 1. ½ÇÇ豺Àº ´ëÁ¶±º¿¡ ºñÇÏ¿© °áÇÕ°­µµ°¡ °¨¼ÒÇÏ¿´À¸¸ç, ƯÈ÷ 25ÃÊ »êºÎ½ÄÇÑ SM ¹× SB±º¿¡¼­´Â Åë°èÇÐÀû À¯ÀÇÂ÷¸¦ ³ªÅ¸³»¾ú´Ù. 2. ¿­¼øȯ ó¸®ÇÑ SM±º°ú SB±ºÀÇ °æ¿ì, 25ÃÊ °£ »êºÎ½ÄÇÑ ±ºÀÌ 5ÃÊ °£ »êºÎ½ÄÇÑ ±º°ú 15ÃÊ °£ »êºÎ½ÄÇÑ ±º¿¡ ºñÇØ À¯ÀǼº ÀÖ°Ô ³·Àº °áÇÕ°­µµ¸¦ ³ªÅ¸³Â´Ù (p < 0.05). 3. OS±ºÀÇ °æ¿ì, »êºÎ½Ä ½Ã°£ ¹× ¿­¼øȯ ¿©ºÎ¿¡ µû¸¥ À¯ÀǼº ÀÖ´Â Â÷ÀÌ°¡ ³ªÅ¸³ªÁö ¾Ê¾Ò´Ù (p > 0.05). »ó¾ÆÁú Á¢ÂøÀÇ ³»±¸¼ºÀº Á¢ÂøÁ¦ÀÇ ¿ë¸Å¿Í »êºÎ½Ä ½Ã°£¿¡ ÀÇÇØ ¿µÇâÀ» ¹ÞÀ¸¸ç ƯÈ÷, ethanol-based adhesive¸¦ »ç¿ëÇÒ ¶§ °úµµÇÑ »êºÎ½ÄÀº À¯ÀÇÇØ¾ß ÇÑ´Ù.

The purpose of this study was to evaluate the effect of different etching times on microtensile bond strength (${\mu}TBS$) to dentin both initial and after thermocycling with 3 different types of total-etching adhesives. Fifty four teeth were divided into 18 groups by etching times (5, 15, 25 sec), adhesives types (Scotchbond Multipurpose (SM), Single Bond (SB), One-Step (OS)) and number of thermocycling (0, 2,000 cycles). Flat dentin surfaces were prepared on mid-coronal dentin of extracted third molars. After exposed fresh dentin surfaces were polished with 600-grit SiC papers, each specimen was acid-etched with 35% phosphoric acid (5, 15, 25 sec) and bonded with 3 different types of total etching adhesives respectively. Then, hybrid composite Z-250 was built up. Half of them were not thermocycled (control group) and the ethers were subjected to 2,000 thermocycle (experimental group). They were sectioned occluso-gingivally into $1.0\;{\times}\;1.0\;mm^2$ composite-dentin beams and tested with universal testing machine at a crosshead speed of 1.0 mm/min. Within limited data of this study, the results were as follows 1. There was no statistically significant difference in ${\mu}TBS$ between the thermocycled and non-thermocycled groups, except for both SM and SB etched for 25 sec. 2. In thermocycled SM and SB groups, bond strength decreased by extended etching time. In total etching systems, adhesive durability for dentin could be affected by type of solvents in adhesive and etching time. Especially, extended etching time may cause deteriorate effects on bond strength when ethanol-based adhesive was used.

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${\mu}TBS$;Etching time;Type of adhesive;Thermocycling;Total-etching systems;Ethanol-based adhesive

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