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INFLUENCE OF REBONDING PROCEDURES ON MICROLEAKAGE OF COMPOSITE RESIN RESTORATIONS

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À̹̾֠( Lee Mi-Ae ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Á¸Çб³½Ç
¼­´ö±Ô ( Seo Deog-Gyu ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Á¸Çб³½Ç
¼ÕÈ£Çö ( Son Ho-Hyun ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Á¸Çб³½Ç
Á¶º´ÈÆ ( Cho Byung-Hoon ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Á¸Çб³½Ç

Abstract

º¹ÇÕ·¹Áø ¼öº¹½Ã, ÀϹÝÀûÀ¸·Î ¿¬¸¶, »êºÎ½Ä, ¼ö¼¼ ¹× °ÇÁ¶ ´Ü°è¸¦ °ÅÃÄ ÀúÁ¡µµ ·¹ÁøÀ» Àû¿ëÇÏ´Â ÀçÁ¢Âø ¼ú½ÄÀ» ÅëÇØ ¿¹»óµÇ´Â ¼öÃà°£±ØÀ» ºÀ¼âÇÑ´Ù. ±×·¯³ª, ÀÌ °úÁ¤Àº ÀçÁ¢ÂøÁ¦ Àû¿ë ÀÌÀü¿¡ ¹°À̳ª Àܻ簡 °£±ØÀ» ¸Å¿ö¹ö¸± ¼ö ÀÖ¾î ±× È¿°ú°¡ ÀǽɵȴÙ. º» ½ÇÇè¿¡¼­´Â ¿¬¸¶ ´Ü°è ÀÌÀü, Áï º¹ÇÕ·¹ÁøÀ» ÁßÇÕÇÑ Á÷ÈÄ¿¡ ÀçÁ¢ÂøÁ¦¸¦ µµÆ÷ÇÑ´Ù¸é º¯¿¬´©ÃâÀ» ´õ ÁÙÀÏ ¼ö ÀÖÀ» °ÍÀ̶ó´Â °¡¼³À» °ËÁõÇÏ°íÀÚ ÇÏ¿´´Ù. ½ÇÇèÀ» À§ÇØ 35°³ÀÇ ¹ß°ÅÇÑ ´ë±¸Ä¡¿¡¼­ Çù¸é°ú ¼³¸é¿¡ ±³ÇÕ¸é º¯¿¬Àº ¹ý¶ûÁú¿¡, Ä¡ÀºÃø º¯¿¬Àº »ó¾ÆÁú¿¡ À§Ä¡ÇÏ´Â 5±Þ ¿Íµ¿À» Çü¼ºÇÏ¿´´Ù. ¿Íµ¿Àº Z250 (3M ESPE, USA)·Î ÃæÀüÇÏ¿´°í, Á¢ÂøÁ¦·Î´Â Single Bond 2 (3M ESPE)À» »ç¿ëÇÏ¿´´Ù. ÀçÁ¢ÂøÁ¦·Î´Â Biscover LV (Bisco, USA) ·¹Áø Àü»öÁ¦¿Í ScotchBond Multi-purpose system (3M ESPE)ÀÇ Á¢ÂøÁ¦, ¹× Á¡µµ°¡ ³·Àº ½ÇÇè¿ë Á¢ÂøÁ¦¸¦ ¿¬¸¶ Àü ¶Ç´Â ÀÏ·ÃÀÇ ¿¬¸¶ ¹× »êºÎ½Ä ÈÄ ¼öº¹¹°ÀÇ º¯¿¬¿¡ Àû¿ëÇÏ¿´´Ù. 2% ¸ÞÆ¿·» ºí·ç ¿ë¾×¿¡ ³× ½Ã°£ µ¿¾È ħÀûÇÑ µÚ ±³ÇÕÃø ¹× Ä¡ÀºÃø º¯¿¬¿¡¼­ÀÇ »ö¼Ò ħÅõ ±íÀ̸¦ ±¤ÇÐ ÀÔü Çö¹Ì°æÀ¸·Î ÃøÁ¤ÇÏ¿´´Ù. ÀçÁ¢ÂøÁ¦ÀÇ Á¡µµ¿Í º¯¿¬¹Ì¼¼´©ÃâÀÇ »ó°ü°ü°èµµ Æò°¡ÇÏ¿´´Ù. ÀçÁ¢Âø ¼ú½Ä, ÀçÁ¢ÂøÁ¦, ¹× º¯¿¬ÀÇ À§Ä¡, ±× °¢°¢¿¡¼­´Â Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷À̸¦ °üÂûÇÒ ¼ö ¾ø¾ú´Ù. ±×·¯³ª, ÀçÁ¢Âø ¼ú½ÄÀ» ½ÃÇàÇÏÁö ¾ÊÀº ´ëÁ¶±ºÀÇ °æ¿ì¿¡´Â ¼¼ °¡Áö ÀçÁ¢ÂøÁ¦¸¦ »ç¿ëÇÑ ÀçÁ¢Âø±º¿¡ ºñÇØ Ä¡ÀºÃø º¯¿¬¿¡¼­ ¹Ì¼¼´©ÃâÀÌ Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô Å©°Ô ³ªÅ¸³µ´Ù(p < 0.05). ´ëÁ¶±º°ú ÀçÁ¢Âø±ºÀÇ ¹Ì¼¼´©ÃâÀÇ Â÷ÀÌ´Â ±³ÇÕÃø º¯¿¬¿¡¼­´Â °üÂûµÇÁö ¾Ê¾Ò´Ù. ¿¬¸¶ ¹× »êºÎ½Ä ÈÄ Ä¡Àºº¯¿¬¿¡ ÀçÁ¢ÂøÁ¦¸¦ Àû¿ëÇÑ °æ¿ì¿¡¼­ ¾àÇÑ À½ÀÇ »ó°ü°ü°è(r = -0.326, p = 0.041)¸¦ º¸ÀÎ °æ¿ì¸¦ Á¦¿ÜÇÏ°í´Â, ÀçÁ¢ÂøÁ¦ÀÇ Á¡µµ¿Í ¹Ì¼¼´©ÃâÀº À¯ÀÇÇÑ »ó°ü°ü°è¸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù.

During a composite resin restoration, an anticipating contraction gap is usually tried to seal with low-viscosity resin after successive polishing, etching, rinsing and drying steps, which as a whole is called rebonding procedure. However, the gap might already have been filled with water or debris before applying the sealing resin. We hypothesized that microleakage would decrease if the rebonding agent was applied before the polishing step, i.e., immediately after curing composite resin. On the buccal and lingual surfaces of 35 extracted human molar teeth, class V cavities were prepared with the occlusal margin in enamel and the gingival margin in dentin. They were restored with a hybrid composite resin Z250 (3M ESPE, USA) using an adhesive AdperTM Single Bond 2 (3M ESPE). As rebonding agents, BisCover LV (Bisco, USA), ScotchBond Multi-Purpose adhesive (3M ESPE) and an experimental adhesive were applied on the restoration margins before polishing step or after successive polishing and etching steps. The infiltration depth of 2% methylene blue into the margin was measured using an optical stereomicroscope. The correlation between viscosity of rebonding agents and mciroleakage was also evaluated. There were no statistically significant differences in the microleakage within the rebonding procedures, within the rebonding agents, and within the margins. However, when the restorations were not rebonded, the microleakage at gingival margin was significantly higher than those groups rebonded with 3 agents (p < 0.05). The difference was not observed at the occlusal margin. No significant correlation was found between viscosity of rebonding agents and microleakage, except very weak correlation in case of rebonding after polishing and etching at gingival margin.

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Rebonding procedure; Microleakage; Composite resin restoration; Bonding resin; Viscosity

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