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Chlorhexidine 󸮰¡ »ó¾ÆÁú Á¢ÂøÁ¦ÀÇ ¹Ì¼¼ÀÎÀå°áÇÕ°­µµ¿¡ ¹ÌÄ¡´Â ¿µÇâ

EFFECT OF CHLORHEXIDINE ON MICROTENSILE BOND STRENGTH OF DENTIN BONDING SYSTEMS

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¿ÀÀºÈ­ ( Oh Eun Hwa ) - °æÈñ´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú Ä¡°úº¸Á¸Çб³½Ç
ÃÖ°æ±Ô ( Choi Kyoung-Kyu ) - °æÈñ´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú Ä¡°úº¸Á¸Çб³½Ç
±èÁ¾·ü ( Kim Jong-Ryul ) - °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» ¿¬±¸´Â »ó¾ÆÁú È¥¼ºÃþÀÇ ±³¿ø¼¶À¯¸¦ °¡¼öºÐÇØÇÏ´Â È¿¼ÒÀÎ MMPs (Matrix metalloproteinses)ÀÇ ¾ïÁ¦Á¦·Î ¾Ë·ÁÁø chlorhexidine (CHX)À» Àû¿ë ÈÄ °áÇÕ°­µµ¸¦ ÃøÁ¤ÇÏ¿´À¸¸ç, À̸¦ °¢°¢ ¿­¼øȯ ó¸® ÈÄ °áÇÕ°­µµ¸¦ ÃøÁ¤ÇÏ¿´´Ù. ¶ÇÇÑ ÁÖ»çÀüÀÚÇö¹Ì°æÀ¸·Î Á¢Âø°è¸é¿¡¼­ÀÇ Æı« ¾ç»óÀ» ºñ±³ ºÐ¼®ÇÏ¿´´Ù. ¿ì½ÄÀÌ ¾ø´Â ¹ß°ÅÇÑ 32°³ÀÇ Á¦3´ë±¸Ä¡ÀÇ ±³ÇÕ¸é »ó¾ÆÁúÀ» ³ëÃâ½ÃÅ°°í GI±×·ì¿¡¼­´Â dentin conditioner¸¦ ó¸® ÈÄ 2% chlorhexidineÀ» Àû¿ë½ÃÅ°°í, »êºÎ½Ä Á¢ÂøÁ¦ ±×·ì¿¡¼­´Â ÀÎ»ê »êºÎ½ÄÀ» ½ÃÇàÇÏ°í 2% chlorhexidineÀ» Àû¿ë ÈÄ 3´Ü°è »êºÎ½ÄÇü »ó¾ÆÁú Á¢ÂøÁ¦ (Scotchbond Multipurpose, SM), 2´Ü°è »êºÎ½ÄÇü »ó¾ÆÁú Á¢ÂøÁ¦ (Single Bond, SB)¸¦ µµÆ÷ÇÏ°í, ÀÚ°¡ºÎ½Ä Á¢ÂøÁ¦ ±×·ì¿¡¼­´Â 2% chlorhexidine Àû¿ë ÈÄ ÀÚ°¡ºÎ½Ä »ó¾ÆÁú Á¢ÂøÁ¦ (Clearfil Tri-S, TS)¸¦ µµÆ÷ÇÑ´Ù. ÀÌÈÄ º¹ÇÕ ·¹Áø (Z-250)°ú GI (Fuji-II LC)¸¦ ÃæÀüÇÑ ½ÃÆíÀ» ÀÇ ´Ü¸éÀ» °®´Â beamÀ¸·Î Á¦ÀÛÇÏ¿© ¿­¼øȯ ÇÏÁö ¾Ê°Å³ª, 10,000ȸ ¿­¼øȯ ()ÇÏ¿´´Ù. Universal testing machine (EZ-test; Shimadzu, Japan)¿¡¼­ cross head speed 1 mm/min·Î ÀÎÀå·ÂÀ» °¡ÇÏ¿©, ¹Ì¼¼ÀÎÀå°áÇÕ°­µµ¸¦ ÃøÁ¤ÇÏ¿´´Ù. ½ÇÇè °á°ú´Â À¯ÀǼöÁØ 0.05 level¿¡¼­ two-way ANOVA¸¦ ÀÌ¿ëÇÏ¿© Åë°èºÐ¼®ÇÏ¿´´Ù. ±× ÈÄ ÆÄÀýµÈ ½ÃÆíÀÇ Æı« ¾ç»óÀ» Çö¹Ì°æ (SEM)À¸·Î °üÂûÇÏ¿© ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù; 1. 2% CHXÀ» Àû¿ëÇÑ ¸ðµç ½ÇÇ豺¿¡¼­ »ó¾ÆÁú°úÀÇ ¹Ì¼¼ÀÎÀå°áÇÕ°­µµ°¡ Áõ°¡ÇÏ¿´°í, ¿­¼øȯÀº »ó¾ÆÁú°úÀÇ ¹Ì¼¼ÀÎÀå°áÇÕ°­µµ¸¦ °¨¼Ò½ÃÄ×´Ù (P > 0.05). 2. CHX Àû¿ë ÈÄ ¿­¼øȯ ÇÑ ±ºÀº CHXÀ» Àû¿ëÇÏÁö ¾Ê°í ¿­¼øȯÇÑ ±º¿¡ ºñÇÏ¿© »ó¾ÆÁú°úÀÇ ¹Ì¼¼ÀÎÀå°áÇÕ°­µµ°¡ ³ô¾ÒÀ¸¸ç, ƯÈ÷ GI¿Í TS±º¿¡¼­ À¯ÀÇÇÑ Â÷À̸¦ ³ªÅ¸³»¾ú´Ù (P < 0.05). 3. Æı« ¾ç»ó ºÐ¼® °á°ú, È¥¼ºÃþ¿¡¼­ÀÇ Á¢Âø¼º Æı«¸¦ º¸À̸ç, CHXÀ» Àû¿ëÇϸé È¥¼ºÃþ ±âÀúºÎ¿¡¼­ »óºÎ·Î Æı« ºÎÀ§°¡ ¿Å°Ü°¡´Â ¾ç»óÀ» ³ªÅ¸³»¾ú´Ù. ÀÌ»óÀÇ ¿¬±¸ °á°ú¸¦ Åä´ë·Î, MMPs ¾ïÁ¦Á¦ÀÎ 2% CHXÀº ±Û·¡½º ¾ÆÀÌ¿À³ë¸Ó ½Ã¸àÆ®¿Í »ó¾ÆÁú Á¢ÂøÁ¦ÀÇ Ãʱ⠹̼¼ÀÎÀå°áÇÕ°­µµ¿¡´Â ¿µÇâÀ» ¹ÌÄ¡Áö ¾ÊÀ¸¸ç, CHX Àû¿ëÀÌ Á¢Âø³»±¸¼ºÀ» À¯ÁöÇϴµ¥ µµ¿òÀÌ µÇ¾ú´Ù.

The purpose of this study was to evaluate the effect of chlorhexidine (CHX) on microtensile bond strength () of dentin bonding systems. Dentin collagenolytic and gelatinolytic activities can be suppressed by protease inhibitors, indicating that MMPs (Matrix metalloproteinases) inhibition could be beneficial in the preservation of hybrid layers. Chlorhexidine (CHX) is known as an inhibitor of MMPs activity in vitro. The experiment was proceeded as follows: At first, flat occlusal surfaces were prepared on mid-coronal dentin of extracted third molars. GI (Glass Ionomer) group was treated with dentin conditioner, and then, applied with 2 % CHX. Both SM (Scotchbond Multipurpose) and SB (Single Bond) group were applied with CHX after acid-etched with 37% phosphoric acid. TS (Clearfil Tri-S) group was applied with CHX, and then, with adhesives. Hybrid composite Z-250 and resin-modified glass ionomer Fuji-II LC was built up on experimental dentin surfaces. Half of them were subjected to 10,000 thermocycle, while the others were tested immediately. With the resulting data, statistically two-way ANOVA was performed to assess the before and after thermo cycling and the effect of CHX. All statistical tests were carried out at the 95 % level of confidence. The failure mode of the testing samples was observed under a scanning electron microscopy (SEM). Within limited results, the results of this study were as follows; 1. In all experimental groups applied with 2 % chlorhexidine, the microtensile bond strength increased, and thermo cycling decreased the micro tensile bond strength (P > 0.05). 2. Compared to the thermocycling groups without chlorhexidine, those with both thermocycling and chlorhexidine showed higher microtensile bond strength, and there was significant difference especially in GI and TS groups. 3. SEM analysis of failure mode distribution revealed the adhesive failure at hybrid layer in most of the specimen. and the shift of the failure site from bottom to top of the hybrid layer with chlorhexidine groups. 2 % chlorhexidine application after acid-etching proved to preserve the durability of the hybrid layer and microtensile bond strength of dentin bonding systems.

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Chlorhexidine;Microtensile bond strength;Durability

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