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EFFECT OF A NEW RESIN MONOMER ON THE MICROLEAKAGE OF COMPOSITE RESIN RESTORATIONS

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¹èÁöÇö ( Bae Ji-Hyun ) - ºÐ´ç¼­¿ï´ëÇб³º´¿ø Ä¡°úº¸Á¸°ú
±è¿µ±Õ ( Kim Young-Kyun ) - ºÐ´ç¼­¿ï´ëÇб³º´¿ø ±¸°­¾Ç¾È¸é¿Ü°ú
À±ÇÊ¿µ ( Yun Pil-Young ) - ºÐ´ç¼­¿ï´ëÇб³º´¿ø ±¸°­¾Ç¾È¸é¿Ü°ú
À̹̾֠( Lee Mi-Ae ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
Á¶º´ÈÆ ( Cho BH ) - ¼­¿ï´ëÇб³ Ä¡Çבּ¸¼Ò

Abstract

º» ¿¬±¸´Â ¹°¼ºÀÇ ´ÜÁ¡ÀÌ ¸¹Àº Èñ¼®ÀçÀÎ TEGDMAÀÇ »ç¿ëÀ» ÁÙÀ̱â À§ÇØ, Bis-GMAÀÇ À¯µµÃ¼·Î¼­ ÁßÇÕ¼öÃàÀÌ Àû°í Á¡µµ°¡ ³·Àº »õ·Î¿î ´Ü·®Ã¼ÀÎ methoxlyated Bis-GMA (Bis-M-GMA)¸¦ ÷°¡ÇÑ º¹ÇÕ·¹ÁøÀÇ ¹ý¶ûÁú°ú »ó¾ÆÁú º¯¿¬¿¡¼­ÀÇ ¹Ì¼¼´©ÃâÀ» ºñ±³ÇÏ¿´´Ù. 40°³ÀÇ ¹ß°ÅµÈ »óÇÏ¾Ç ¼Ò±¸Ä¡ÀÇ Çù¸é°ú ¼³¸é¿¡ 2;mm;{times};2;mm;{times};2;mm ¿Íµ¿À» Çü¼ºÇÏ¿© 4°³ ±ºÀ¸·Î ºÐ·ùÇÏ¿´´Ù. Clearfil SE bond¿Í º¹ÇÕ·¹ÁøÀ» ÀÌ¿ëÇÏ¿© ¿Íµ¿À» ¼öº¹ÇÏ¿´´Ù. EX1±ºÀº ½ÇÇè¿ë º¹ÇÕ·¹Áø 1 (Bis-M-GMA/TEGDMA = 95/5wt% ,40 nm ³ª³ëÇÊ·¯ ÇÔÀ¯), EX2±ºÀº ½ÇÇè¿ë º¹ÇÕ·¹Áø 2 (Bis-M-GMA/TEGDMA = 95/5wt%, 20 nm ³ª³ëÇÊ·¯ ÇÔÀ¯), EX3±ºÀº ½ÇÇè¿ë º¹ÇÕ·¹Áø 3 (Bis-GMA/TEGDMA = 70/30wt%, 40 nm ³ª³ëÇÊ·¯ ÇÔÀ¯), Z250±ºÀº Filtek 2250À¸·Î °¢°¢ ¿Íµ¿À» ¼öº¹ÇÏ¿´´Ù. ¸ðµç ½ÃÆíÀº ½Ç¿ÂÀÇ ½Ç¿ÂÀÇ »ý¸®½Ä¿°¼ö¿¡¼­ 7ÀÏ°£ º¸°üÇÑ ÈÄ, 5 {circ}C¿Í 55{circ}C ÀÇ ¼öÁ¶¿¡¼­ 500ȸÀÇ ¿­¼øȯÀ» ½Ç½ÃÇÏ°í, 2% methylene blue¿°»ö ¿ë¾×¿¡ 24½Ã°£ ´ã±Ù ÈÄ, Çù¼³ÃøÀ¸·Î Ä¡¾Æ ÀåÃà¿¡ ÆòÇàÇÏ°Ô Àý´ÜÇÏ°í ±¤ÇÐÀÔüÇö¹Ì°æÇÏ¿¡¼­ °¢ ¼öº¹¹°ÀÇ ¹ý¶ûÁú°ú »ó¾ÆÁú º¯¿¬ºÎÀÇ »ö¼ÒħÅõ Á¤µµ¸¦ °üÂûÇÏ¿© ¹Ì¼¼´©ÃâÁ¡¼ö·Î ±â·ÏÇÑ ÈÄ °¢ ±ºÀÇ À¯ÀǼºÀ» °ËÁõÇÏ¿´´Ù. ¹ý¶ûÁú º¯¿¬ÀÌ »ó¾ÆÁú º¯¿¬º¸´Ù À¯ÀǼºÀÖ°Ô ³·Àº ¹Ì¼¼º¯¿¬´©ÃâÀ» º¸¿´´Ù (p = 0.007). °¢ º¯¿¬¿¡¼­ EX1, EX2º¸´Ù EX3, Z250±ºÀÇ ¿°»öħÅõµµ°¡ Áõ°¡ÇÏ´Â °æÇâÀ» º¸¿´Áö¸¸ Åë°èÀûÀ¸·Î À¯ÀǼº ÀÖ´Â Â÷À̸¦ º¸ÀÌÁö´Â ¾Ê¾Ò´Ù (p > 0.05). Á¡µµ°¡ ³·Àº »õ·Î¿î ·¹Áø´Ü·®Ã¼ÀÎ Bis-M-GMA´Â ±âÁ¸ÀÇ ´Ü·®Ã¼ÀÎ Bis-GMAÀÇ ´ëüÀç·Î °í·ÁµÉ ¼ö ÀÖ´Ù.

The purpose of this study was to evaluate the effect of a new resin monomer on the microleakage of composite resin restorations. By adding new methoxylated Bis-GMA (Bis-M-GMA, 2,2-bis[4-(2-methoxy-3-methacryloyloxy propoxy) phenyl] propane) having low viscosity, the content of TEGDMA which has adverse effects on polymerization shrinkage might be decreased. As a result, microleakage might be improved. 2;mm;{times};2;mm;{times};2;mm cavities with occlusal margins in enamel and gingival margins in dentin were prepared on buccal and lingual surfaces of 40 extracted human premolars. Prepared teeth were randomly divided into four groups and restored with Clearfil SE bond (Kuraray, Japan) and one of experimental composite resins; EX1, Experimental composite resin1 (Bis-M-GMA/TEGDMA = 95/5 wt%, 40 mm nanofillers); EX2, Experimental composite resin2 (Bis-M-GMA/TEGDMA = 95/5 wt%, 20 mm nanofillers); EX3, Experimental composite resin3 (Bis-GMA/TEGDMA = 70/30 wt%, 40 nm nanofillers); and Filtek Z250 (3M ESPE, USA) was filed as a control group. The restored teeth were thermocycled, and immersed in 2% methylene blue solution for 24 hours. The teeth were sectioned buccolingually with a low speed diamond saw and evaluated for microleakage under stereomicroscope. The data were statistically analyzed by Pearson Chi-Square test and Fisher Exact test (p = 0.05). The microleakage scores seen at the enamel margin were significantly lower than those of dentin margin (p = 0.007). There were no significant differences among the composite resins in the microleakage scores within each margin (p > 0.05). Bis-M-GMA, a new resin monomer having low viscosity, might in part replace high viscous Bis-CMA and might improve the quality of composite resin.

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Microleakage;New resin monomer;Bis-M-GMA;Viscosity;Polymerization shrinkage

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