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INFLUENCE OF A SODIUM HYPOCHLORITE GEL ON MICROLEAKAGE OF COMPOSITE RESIN RESTORATIONS

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Abstract

º» ¿¬±¸´Â À¯Ä¡ÀÇ º¹ÇÕ·¹Áø ¼öº¹ ½Ã »óÇ°È­µÈ 10£¥ NaOCl(AD gel??, Kuraray, Japan)ÀÇ »ç¿ëÀÌ ¼öº¹¹°ÀÇ ¹Ì¼¼´©Ãâ Çü¼º¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Æò°¡ÇÏ°íÀÚ ÇÏ¿´´Ù. Å»¶ô±âÀÇ ¼Õ»óÀÌ ¾øÀÌ °ÇÀüÇÑ À¯±¸Ä¡ 80°³ÀÇ Çù¸é¿¡ Á÷°æ 1.5mm, ±íÀÌ 1.5mmÀÇ ¿Íµ¿À» Çü¼ºÇÏ¿´´Ù. »êºÎ½Ä ÈÄ AD gel??À» ¿Íµ¿¿¡ 0ÃÊ(´ëÁ¶±º), 60Ãʾ¿(½ÇÇ豺) Àû¿ëÇÏ¿´´Ù. ¿Íµ¿Àº ¼¼Ã´ ÈÄ Á¥Àº »óŸ¦ À¯ÁöÇÏ¿´°í °¢ »ó¾ÆÁú Á¢ÂøÁ¦´Â Á¦Á¶»çÀÇ Áö½Ã´ë·Î »ç¿ëÇÏ¿´´Ù. 2Á¾ÀÇ »ó¾ÆÁú Á¢ÂøÁ¦¸¦ »ç¿ëÇÏ¿´´Âµ¥ 4¼¼´ë Á¢ÂøÁ¦ÀÎ Scotchbond Multi-Purpose(3M. USA)¿Í 5¼¼´ë Á¢ÂøÁ¦·Î¼­ one-bottle systemÀÎ Single Bond(3M, USA)¸¦ »ç¿ëÇÏ¿´´Ù. ¿Íµ¿ ÃæÀüÀº º¹ÇÕ·¹Áø Z100(3M, USA)ÀÇ P-shade¸¦ Optilux 501(950 mW/§², Demetron, USA)À» »ç¿ëÇÏ¿© 10ÃÊ°£ ±¤ÁßÇÕÇÏ¿´´Ù. °¢ ½ÃÆíÀ» 5¡É¿Í 55¡É¿¡ °¢ 30Ãʾ¿ °è·ù½ÃÄÑ 1,000ȸ ¿­¼øȯ(thermocycling)ÇÏ°í 2% methylene blue¼ö¿ë¾×¿¡ ³Ö¾î 24½Ã°£ ¿°·á¸¦ ħÅõ½ÃŲ µÚ, Àú¼Ó diamond cutter(IsometTM, Buehler, USA)¸¦ ÀÌ¿õÇÏ¿© ÁÖ¼öÇÏ¿¡ Çù¸éÀ» ±Ù¿ø½ÉÀ¸·Î Àý´ÜÇÏ¿´´Ù. »ö¼ÒÀÇ Ä§Åõ Á¤µµ¸¦ ÀÔüÇö¹Ì°æÀ» ÀÌ¿ëÇÏ¿© ħÅõ ±íÀ̸¦ ÃøÁ¤ÇÑ µÚ ¹Ì¼¼´©ÃâÀÇ Á¤µµ¸¦ ºñ±³ÇÏ¿´´Ù.
AD gel??À» »ç¿ëÇÑ ±º¿¡¼­ ¹Ì¼¼´©ÃâÀÇ Å©±â°¡ Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÏ°Ô ÀÛ°Ô ³ªÅ¸³µ´Ù. AD gel??À» »ç¿ëÇÑ »ó¾ÆÁúÀÇ Äݶó°ÕÃþ Á¦°Å°¡ À¯Ä¡ÀÇ º¹ÇÑ·¹Áø ÃæÀü½Ã ¹Ì¼¼´©ÃâÀ» °¨¼Ò½Ãų ¼ö ÀÖ¾ú´Ù.
This study evaluated the effect of a commercial 10% sodium hypochlorite gel(AD gel¢¥, Kuraray, Japan) on the microleakage of composite resin restorations in primary teeth. On the buccal surface of eighty extracted human primary molars, 0-shaped cavities were prepared with high speed carbide bur: the diameter and depth of cavities were 1.5 mm. After rinsing off the etchant, one drop of AD gel¢ç was pretreated to the etched cavities and left for 0 second(control) and 60 seconds. The gel was rinsed off with water and the cavity surface kept visibly moist prior to the application of the adhesive as per manufacturer¢¥s instructions. The adhesives are Scotchbond Multi-Purpose(3M, USA), and Single Bond(3M. USA). The cavities were filled with composite resin Z100(3M, USA) and light cured with Optilux 501(Demetron, USA) for 10 seconds. The restorations were polished using the Sof-Lex discs(3M, USA). The specimens were thermocycled for 1,000 times in baths kept 5 degrees C and 55 degrees C with a 30 seconds dwell time. Then, they were immersed in a 2% methylene blue solution(pH 7) for 12 hours. Subsequently they were sectioned mesio-distally through the center of the restoration with a diamond saw at low speed with a water coolant, and evaluated by stereomicroscopy. Microleakage analyses were done, using scores from 0 to AD gel¢ç treatment groups resulted in reduced microleakage(P(0.05). The removal of the collagen layer with AD gel¢ç can decrease microleakage, depending on the dentin adhesive used.

Å°¿öµå

¹Ì¼¼´©Ãâ;À¯Ä¡;AD gel;º¹ÇÕ·¹Áø;»ó¾ÆÁú Á¢ÂøÁ¦;È¥¼ºÃþ;Microleakage;Primary teeth;AD gel;Composite resin;Dentin adhesive;Hybrid layer

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