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Influence of Sodium Hypochorite & EDTA on the Microtensile Bond Strength of Ethanol Wet Bonding

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À¯¹Ì°æ ( Yu Mi-Kyung ) - ÀüºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
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Abstract

±Ù°üÄ¡·á ÈÄ ÀûÀýÇÑ Ä¡°üºÎ ¹ÐÆó¸¦ À§ÇØ ·¹ÁøÀ» ÀÌ¿ëÇÑ ÄÚ¾î¼öº¹¹æ¹ýÀÌ ÇöÀç ¸¹ÀÌ »ç¿ëµÇ°í ÀÖ´Ù. ÇÏÁö¸¸, ±Ù°üÄ¡·á °úÁ¤¿¡¼­ »ç¿ëµÇ´Â NaOClÀ̳ª EDTA°°Àº ±Ù°ü¼¼Ã´Á¦´Â ·¹Áø Á¢Âø¿¡ ¿µÇâÀ» ÁÖ´Â °ÍÀ¸·Î ¾Ë·ÁÁ® ÀÖÀ¸¸ç,ÀÌ¿¡ °üÇÑ ¸¹Àº ¿¬±¸µéÀÌ ÀÌ·ç¾îÁ® ¿Ô´Ù. º» ¿¬±¸¿¡¼­´Â ethanol wet bondingÀ» Ä¡¼ö°­ »ó¾ÆÁú¿¡ Àû¿ë ½Ã¿¡ NaOCl°ú EDTA°¡ °áÇÕ°­µµ¿¡ ¹ÌÄ¡´Â ¿µÇâ¿¡ ´ëÇØ Á¶»çÇÏ¿´´Ù.30°³ÀÇ Àΰ£ ´ë±¸Ä¡·ÎºÎÅÍ ÃÑ 60°³ÀÇ ½ÃÆíÀ» ¾ò¾ú°í, À̸¦ ¹«ÀÛÀ§·Î 4°³ÀÇ ±ºÀ¸·Î ºÐ·ùÇß´Ù. G1: Áõ·ù¼ö·Î ¼¼Ã´ÈÄ Áõ·ù¼ö·Î ¸¶¹«¸® ¼¼Ã´, G2: NaOCl·Î ¼¼Ã´ ÈÄ NaOCl·Î ¸¶¹«¸®¼¼Ã´, G3: NaOCl·Î ¼¼Ã´ ÈÄ EDTA·Î ¸¶¹«¸®¼¼Ã´,G4: NaOCl·Î ¼¼Ã´ ÈÄ EDTA·Î ¸¶¹«¸®¼¼Ã´ÇÏ°í Á¢Âø°úÁ¤¿¡¼­ »êºÎ½Ä°úÁ¤ »ý·«. Á¢Âø°úÁ¤Àº ÀλêºÎ½Ä ÈÄ ¿¡Åº¿ÃÀÇ ³óµµ¸¦ 50%, 70%, 80%, 95% ±×¸®°í 100%·Î ¼øÂ÷ÀûÀ¸·Î Áõ°¡½ÃÄÑ°¡¸é¼­ »ó¾ÆÁúÀ» Å»¼ö½ÃÅ°°í ¿¡Åº¿Ã¿¡ Àû¼ÅÁöµµ·Ï ÇÏ¿´´Ù. ÇÁ¶óÀ̸Ӵ HEMA°¡ Æ÷ÇÔµÇÁö ¾ÊÀº »ó¿ëÈ­µÈ Á¢ÂøÁ¦ÀÎ ALL-BOND 3 RESIN°ú ¿¡Åº¿ÃÀ» ¹Ý¹Ý¾¿ ¼¯¾î ¸¸µé¾ú´Ù. ÇÁ¶óÀÌ¸Ó Àû¿ë ÈÄ ALL-BOND 3 RESINÀ» Á¢ÂøÁ¦·Î »ç¿ëÇÏ¿´´Ù. ÀúÁ¡µµ º¹ÇÕ·¹ÁøÀ» ÀÌ¿ëÇÏ¿© 6mm µÎ²²·Î ÀûÃþÃæÀüÇÑ ÈÄ ºö ÇüÅ·ΠÀ߶ó ¹Ì¼¼ÀÎÀå°áÇÕ°­µµ ½ÇÇèÀ» ÇÏ¿´´Ù.NaOCl ó¸®ÇÑ ±×·ìÀº ¹Ì¼¼ÀÎÀå°áÇÕ°­µµ¿¡ Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷À̸¦ º¸¿©ÁÖÁö´Â ¾Ê¾ÒÁö¸¸ ³·Àº Æò±Õ°ªÀ» º¸¿©ÁÖ¾ú´Ù(p=0.052). NaOCl ó¸® ÈÄ 1ºÐ°£ EDTA·Î ó¸®ÇÑ ±×·ìÀº ´Ù¸¥ ±×·ìº¸´Ù À¯ÀÇÇÏ°Ô ³ôÀº °áÇÕ°­µµ¸¦ º¸¿©ÁÖ¾ú´Ù(p<0.05). EDTA 󸮰¡ °áÇÕ°­µµ¸¦ Çâ»ó ½ÃÄ×Áö¸¸, »êºÎ½Ä °úÁ¤À» »ý·«ÇÒ °æ¿ì À¯ÀÇÇÏ°Ô ³·Àº °áÇÕ °­µµ¸¦ º¸¿©ÁÖ¾úÀ¸¸ç, ÀÌ´Â EDTA󸮰¡ »êºÎ½Ä °úÁ¤À» ´ë½ÅÇÒ ¼ö´Â ¾ø´Ù´Â °ÍÀ» º¸¿©ÁØ´Ù.

Sodium hypochlorite and ethylene diamine tetra acetic acid are substances usually used during endodontic treatment.
Several studies found that the bonding was negated with certain irrigants and some of the used irrigants have demineralizing and chealating effects, so it was advocated to omit the etching step in etch and rinse adhesive systems. The purpose of this in vitro study was to evaluate the influence of NaOCl & EDTA on the bonding strength of ethanol wet bonding .Thirty human molars were selected and mesiodistally sectioned into halves, thus providing sixty specimens. The specimens were randomly assigned to 4 groups(n=15) according to the irrigant regimen used : (1) irrigated with distilled water for 10min (control); (2) irrigated with 5.25% NaOCl(10min), flushed with 5.25% NaOCl(1min) (3) irrigated with
5.25% NaOCl, flushed with 17% EDTA (4) irrigated with 5.25% NaOCl, flushed with 17% EDTA. Each group was
acid-etched with 37% phosphoric acid(except group 4) and had their dentin surfaces dehydrated with ethanol solutions :
50%, 70%, 80%, 95%, 3x100%, 30s for each application. After dehydration, a primer( 50% all bond 3 resin + 50% ethanol)
was used, followed by the adhesive(ALL-BOND 3 RESIN) application. Resin composite build-ups were then prepared using an incremental technique. Specimens were sectioned into beams and submitted to a tensile load using a Micro Tensile Tester(Bisco Inc.). The data were statistically analyzed using one-way ANOVA and Tukey HSD at p<0.5 level.
There was no significant difference on G1(control) and G2(irrigated with NaOCl only ). (p>0.05). G3(flushed with
EDTA) showed significantly high tensile bonding strength compared to the G2 (p<0.05). G4( treated with EDTA but no
acid-etching) was significantly lower value than G3. (p<0.05) Although there was no significant difference, 5.25% NaOCl seemed to have an adverse effect on the bonding strength of ethanol wet bonding. The flushing with EDTA after NaOCl irrigation prevents the decrease of bonding strength. The use of 17% EDTA as a final flush can enhance the bonding strength but EDTA flushing can¡¯t substitute for a acid-etching.

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»ó¾ÆÁúÀÇ ¼Ò¼ö¼º Á¢Âø;°áÇÕ°­µµ;±Ù°ü¼¼Ã´¾×;Ä¡¼ö°­ »ó¾ÆÁú;EDTA;Â÷¾Æ¿°¼Ò»ê³ªÆ®·ý
ethanol wet bonding;bonding strength;irrigant solution;pulp chamber dentin;EDTA;sodium hypochlorite

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