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THE BONDING DURABILITY OF RESIN CEMENTS

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Á¶¹Î¿ì ( Cho Min-Woo ) - °æÈñ´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú Ä¡°úº¸Á¸Çб³½Ç
¹Ú»óÇõ ( Park Sang-Hyuk ) - °æÈñ´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú Ä¡°úº¸Á¸Çб³½Ç
±èÁ¾·ü ( Kim Jong-Ryul ) - °æÈñ´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú Ä¡°úº¸Á¸Çб³½Ç
ÃÖ°æ±Ô ( Choi Kyoung-Kyu ) - °æÈñ´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú Ä¡°úº¸Á¸Çб³½Ç

Abstract

4Á¾ÀÇ ·¹Áø½Ã¸àÆ®¸¦ ÅëÇÑ »ó¾ÆÁú°ú °£Á¢ ·¹Áø ¼öº¹¹° °£ÀÇ ÀÎÀå°áÇÕ°­µµ¸¦ ¿­¼øȯ ½Ãȿó¸® ¿©ºÎ¿¡ µû¶ó ÃøÁ¤ÇÏ¿© ºñ±³ÇÏ°í, ÁÖ»çÀüÀÚÇö¹Ì°æ °üÂûÀ» ÅëÇÏ¿© °¢ ·¹Áø½Ã¸àÆ®ÀÇ Á¢Âø ³»±¸¼ºÀ» Æò°¡ÇÏ°íÀÚ ½ÃÇàÇÏ¿´´Ù. 48°³ÀÇ °ÇÀüÇÑ Á¦3´ë±¸Ä¡ÀÇ »ó¾ÆÁú Ç¥¸éÀ» ÆòźÇÏ°Ô ³ëÃâ½ÃÅ°°í #320 grit Sic Paper·Î ¿¬¸¶ÇÏ¿´´Ù. º¹ÇÕ·¹Áø ºí·ÏÀ» Á¦ÀÛÇÏ¿© #600 grit Sic Paper·Î ¿¬¸¶ÇÑ ÈÄ¿¡ Á¢Âø¸éÀ» Sandblast·Î ó¸®ÇÏ¿´´Ù. °¢°¢ÀÇ ·¹Áø½Ã¸àÆ®·Î Á¦Á¶»ç Áöħ¿¡ µû¶ó Àû¿ëÇÏ¿© º¹ÇÕ·¹Áø ºí·ÏÀ» »ó¾ÆÁú Ç¥¸é¿¡ Á¢ÂøÇÏ¿´´Ù. ÀÌÈÄ Á¦ÀÛµÈ ½ÃÆíÀ» ¿­¼øȯ½ÃÅ°Áö ¾Ê°Å³ª, 1,000ȸ, 5,000ȸ ¿­¼øȯ ½ÃŲ ÈÄ ($5^{\circ}C\;-\;55^{\circ}C$) ¹Ì¼¼ÀÎÀå°áÇÕ°­µµ¸¦ ÃøÁ¤ÇÏ¿´´Ù. ¿­¼øȯ Àü ½ÃÆíÀÇ Á¢Âø°è¸é (¼öÁ÷Àý´Ü¸é)°ú ÆÄÀýµÈ ½ÃÆíÀÇ »ó¾ÆÁú ÆĴܸéÀ» ÀüÀÚÇö¹Ì°æ °üÂûÇÏ¿© ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù. 1. Variolink IIÀÇ °áÇÕ°­µµ´Â ´Ù¸¥ ½ÇÇ豺º¸´Ù ³ôÀº °áÇÕ°­µµ¸¦ º¸¿©ÁÖ¾úÀ¸¸ç, 1,000ȸ ¿­¼øȯ ÈÄ À¯ÀǼº ÀÖ°Ô °áÇÕ°­µµ°¡ °¨¼ÒµÇ¾ú´Ù (p < 0.05). 3. MultilinkÀÇ °áÇÕ°­µµ´Â ¿­¼øȯ¿¡ °¡Àå ¸¹Àº ¿µÇâÀ» ¹Þ¾ÒÀ¸¸ç 1,000ȸ ¿­¼øȯ ÀÌÈÄ À¯ÀǼº ÀÖ°Ô °¨¼ÒµÇ¾ú´Ù (p < 0.05). 3. Panavia F 2.0°ú Rely X UnicemÀÇ °áÇÕ°­µµ´Â ¿­¼øȯ¿¡ ÀÇÇÏ¿© °¨¼ÒµÇÁö ¾Ê¾Ò´Ù (p > 0.05). 4. Á¢ÂøÇü ·¹Áø½Ã¸àÆ®´Â º¹ÇÕ·¹ÁøÇü ·¹Áø½Ã¸àÆ®¿¡ ºñÇؼ­ ¿­Ã³¸® ÀüÈÄ ¸ðµÎ ³·Àº °áÇÕ°­µµ¸¦ º¸¿©ÁÖ¾ú´Ù. 5. °áÇÕ°­µµ°¡ ³ôÀº Vaviolink II¿Í Multilink¿¡¼­´Â È¥ÇÕÇü Æı«¾ç»óÀ» º¸¿´°í, °áÇÕ°­µµ°¡ ³·Àº Panavia F 2.0¿¡¼­´Â Á¢Âø¼º Æı« ¾ç»óÀ» ³ªÅ¸³»¾ú´Ù. ÀÌ»óÀÇ ¿¬±¸ °á°ú¸¦ Åä´ë·Î ÀûÀýÇÑ Àüó¸®¿Í Á¢ÂøÁ¦¸¦ µµÆ÷ÇÑ´Ù¸é º¹ÇÕ·¹ÁøÇü ·¹Áø½Ã¸àÆ®´Â Á¢ÂøÇü ·¹Áø½Ã¸àÆ®º¸´Ù °áÇÕ°­µµ¿Í ±× ³»±¸¼ºÀÌ ¿ì¼öÇÏ´Ù°í ÇÒ ¼ö ÀÖÀ» °ÍÀÌ´Ù. Á¢Âø¼º °£Á¢ ¼öº¹¹°ÀÇ Ãʱ⠰áÇÕ°­µµ¿Í ³»±¸¼ºÀº ·¹Áø½Ã¸àÆ®ÀÇ Á¢Âø°úÁ¤°ú Á¾·ù, ÇüÅ¿¡ ÀÇÇØ ¿µÇâÀ» ¹Þ±â ¶§¹®¿¡ À̵éÀÇ ÀûÀýÇÑ ¼±Åðú ¿Ã¹Ù¸¥ »ç¿ëÀÌ ¼º°øÀûÀÎ ¼öº¹À» À§ÇØ Áß¿äÇÏ´Ù.

The objectives of this study was to evaluate the durability of 4 resin cements by means of microtensile bond strength test combined with thermocycling method and fractographic FE-SEM analysis. Experimental groups were prepared according to thermocycling (0, 1,000, 5,000) and the kind of resin cements, those were Variolink II, Multilink, Panavia F 2.0, Rely X Unicem. Flat dentin surfaces were created on mid-coronal dentin of extracted third molars. Then fresh dentin surface was grounded with 320-grit silicon carbide abrasive papers to create uniform smear layers. Indirect composite block (Tescera, Bisco Inc., Schaumburg, IL, USA) was fabricated ($12\;{\times}\;12\;{\times}\;6\;mm^3$). It¡¯s surface for bonding to tooth was grounded with silicon carbide abrasive papers from 180- to 600-grit serially, then sandblasted witk $20\;-\;50\;{\mu}m$ alumina oxide. According to each manufacturer¡¯s instruction, dentin surface was treated and indirect composite block was luted on it using each resin cement. For Rely X Unicem, dentin surface was not treated. The bonded tooth-resin block were stored in distilled water at $37^{\circ}C$ for 24 hours. After thermocycling, the bonded tooth-resin block was sectioned occluso-gingivally to 1.0 mm thick serial slabs using all Isomet slow-speed saw (Isomet, Buehler Ltd, Lake Bluff, IL, USA). These sectioned slabs were further sectioned to $1.0\;{\times}\;1.0\;mm^2$ composite-dentin beams. The specimens were tested with universal testing machine (EZ-Test, Shimadzu, Japan) at a crosshead speed of 1.0 mm/min with maximum load of 500 N. The data was analyzed using one-way ANOVA and Duncan¡¯s multiple comparison test at $p\;{\leq}\;0.05$ level. Within the limited results, we conclude as follows; 1. The bond strength of Variolink II was evaluated the highest among experimental groups and was significantly decreased after 1,000 thermocycling (p < 0.05). 2. The bond strength of Multilink was more affected by thermocycling than the other experimental groups and significantly decreased after 1,000 thermocycling (p < 0.05). 3. Panavia F 2.0 and Rely X Unicem showed the gradually decreased tendency of microtensile bond strength according to thermocycling but there was no significant difference (p > 0.05). 4. Adhesive based-resin cements showed lower bond strength with or without thermocycling than composite based-resin cements. 5. Variolink II & Multilink showed high bond strength and mixed failure, which was occurred with a thin layer of luting resin cement before thermocycling and gradually increased adhesive failure along the dentin surface after thermocycling. The bonding performance of resin cement can be affected by application procedure and chemical composition. Composite based-resin cement showed higher bond strength and durability than adhesive based-resin cement.

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Bonding Durability;Resin Cement;Variolink II;Multilink;Panavia F 2.0;Rely X Unicem

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