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MICROLEAKAGE OF THE EXPERIMENTAL COMPOSITE RESIN WITH THREE COMPONENT PHOTOINITIATOR SYSTEMS

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±èÁöÈÆ ( Kim Ji-Hoon ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
½Åµ¿ÈÆ ( Shin Dong-Hoon ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç

Abstract

ÇöÇà º¹ÇÕ·¹Áø¿¡¼­ °¡Àå ¸¹ÀÌ »ç¿ëµÇ°í ÀÖ´Â ±¤ÁßÇÕ°³½ÃÁ¦ÀÇ ÀÏÁ¾ÀÎ camphoroquinoneÀº ÁßÇÕ È¿°ú°¡ Àû°í Ȳ»öÀ» ¶ì±â ¶§¹®¿¡ ´Ù¸¥ °³½ÃÁ¦¿¡ ´ëÇÑ ¿¬±¸°¡ ÀÌ·ç¾îÁ® ¿Ô´Ù. ÀÌ¿¡ º» ¿¬±¸¿¡¼­´Â »õ·Î¿î °³½ÃÁ¦ÀÎ OPPI (p-octyloxy-phenyl-phenyl iodonium hexafluoroantimonate)¸¦ ±âÁ¸ÀÇ camphoroquinone, amine°ú ´Ù¾çÇÑ ºñÀ²·Î È¥ÇÕÇÑ ´ÙÀ½, barium glass¸¦ ÷°¡ÇÑ ½ÇÇè¿ë º¹ÇÕ·¹ÁøÀ» Á¦Á¶ÇÏ¿© °¢ ¼öº¹ÀçÀÇ ¹Ì¼¼´©Ãâµµ¸¦ ºñ±³, Æò°¡ÇÏ¿´´Ù. ÃÑ 4Á¾ÀÇ ´Ü·®Ã¼¸¦ Á¦Á¶ÇÏ¿´À¸¸ç camphoroquinone, OPPI, amineÀÇ Á¶¼º Áß·®ºñ´Â ´ÙÀ½°ú °°´Ù: A±º - 0.5%, 0%, 1% / B±º - 2%, 0.2%, 2% / C±º - 0.2%, 1%, 0.2% / D±º - 1%, 1%, 2%. ÀÌÈÄ Æò±Õ ÀÔÀÚ Å©±â 1 ¥ìmÀÇ 3.2% silane ó¸®µÈ barium glass¸¦ Áß·®ºñ 78%·Î ¼¯¾î º¹ÇÕ·¹ÁøÀ» Á¦Á¶ÇÏ¿´´Ù. ÃÑ 55°³ÀÇ ¼Ò±¸Ä¡¿¡ Ä¡°æºÎ¸¦ Áß½ÉÀ¸·Î ¿øÇü ¿Íµ¿À» (Á÷°æ; ±Ù¿ø½É Æø°æÀÇ 2/3, ±íÀÌ; 1.5 mm) Çü¼ºÇÑ ´ÙÀ½, ÀÚ°¡ºÎ½ÄÇü Á¢Âø½Ã½ºÅÛÀÎ Hybrid Bond·Î ó¸®ÇÏ°í 4Á¾ÀÇ º¹ÇÕ·¹ÁøÀ¸·Î ¼öº¹ÇÏ¿´´Ù. ¿¬¸¶ ÈÄ Ä¡¾Æ¸¦ ¼·¾¾ 5µµ¿Í 55µµ¿¡¼­ °¢±â 30Ãʾ¿ ´ã±Å 500ȸÀÇ ¿­¼øȯ ó¸®ÇÏ¿´À¸¸ç Àü±âÈ­ÇÐÀû ¹æ¹ýÀ¸·Î Àü±â Àüµµ¼ºÀ» 2ȸ (¿­¼øȯ ó¸® ÈÄ, 1ÁÖ °£°ÝÀ¸·Î ½Ä¿°¼ö¸¦ ±³È¯Çϸç 3°³¿ù º¸°ü ÈÄ) ÃøÁ¤, ºñ±³ÇÏ¿´´Ù. ¹Ì¼¼´©Ãâµµ´Â ½Ã°£ °æ°ú¿¡ µû¶ó Ä¿Áö´Â ¾ç»óÀ» º¸¿´À¸¸ç, ¿­¼øȯ ó¸® Á÷ÈÄ 4Á¾ º¹ÇÕ·¹Áø »çÀÌ¿¡ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾ÒÁö¸¸, 3°³¿ù º¸°ü ÈÄ¿¡´Â D±ºÀÌ °¡Àå Àû¾úÀ¸¸ç C±ºÀÌ °¡Àå Å« ¹Ì¼¼´©ÃâÀ» º¸¿´´Ù. ¿­¼øȯ ÀÚ±Ø Á÷ÈÄ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾ÒÁö¸¸, 3°³¿ù º¸°ü ÈÄ ÃøÁ¤Ä¡·Î ¹Ì·ç¾î º¼ ¶§, OPPI¿Í Àü¹ÝÀûÀÎ ÁßÇսýºÅÛÀÌ °í³óµµ·Î ÇÔÀ¯µÈ º¹ÇÕ·¹Áø(D±º)°ú CQ¿Í ¾Æ¹Î¸¸À» »ç¿ëÇÑ ÀüÅëÀûÀÎ º¹ÇÕ·¹Áø(A±º)ÀÌ ÁßÇÕ°³½Ã½Ã½ºÅÛÀ» Àú³óµµ·Î ÇÔÀ¯ÇÑ º¹ÇÕ·¹Áø(C±º)¿¡ ºñÇØ ¿ì¼öÇÑ ¹ÐÆóÈ¿°ú¸¦ º¸¿´´Ù. ÀÌ´Â ½Ã°£ÀÇ È帧¿¡ µû¶ó Á¢Âø°è¸éÀÇ ÅðÈ­°¡ ÀϾ°Å³ª ÀϺΠ¼ººÐÀÌ ¿ëÇØ°¡ µÇ¾î ³ª¿Â °ÍÀ¸·Î º¸ÀÌ¸ç ¾ÕÀ¸·Î ÀÌ¿¡ ´ëÇÑ ´õ ¸¹Àº ¿¬±¸°¡ ÇÊ¿äÇÒ °ÍÀ¸·Î »ç·áµÈ´Ù.

This study was done to determine if there is any difference in microleakage between experimental composite resins, in which various proportions of three component photoinitiators (Camphoroquinone, OPPI,Amine) were included. Four kinds of experimental composite resin were made by mixing 3.2% silanated barium glass (78 wt.%, average size; 1 ¥ìm) with each monomer system including variously proportioned photoinitiator systems used for photoinitiating BisGMA/BisEMA/TEGDMA monomer blend (37.5:37.5:25 wt.%). The weight percentage of each component were as follows (in sequence Camphoroquinone, OPPI, Amine): Group A -0.5%, 0%, 1% / Group B - 2%, 0.2%, 2% / Group C - 0.2%, 1%, 0.2% / Group D - 1%, 1%, 2%. Each composite resin was used as a filling material for round class V cavities (diameter: 2/3 of mesiodistal width; depth: 1.5 mm) made on extracted human premolars and they were polymerized using curing light unit (XL 2500, 3M ESPE) for 40 s with an intensity of 600 mW/cm2. Teeth were thermocycled fivehundred times between 50¡É and 550¡É for 30s at each temperature. Electrical conductivity (¥ìA) was recorded two times (just after thermocycling and after three-month storage in saline solution) by electrochemical method. Microleakage scores of each group according to evaluation time were as follows [Group: at first record / at second record; unit (¥ìA)]: A: 3.80 (0.69) / 13.22 (4.48), B: 3.42 (1.33) / 18.84 (5.53), C: 4.18 (2.55) / 28.08 (7.75), D: 4.12 (1.86) / 7.41 (3.41). Just after thermocycling, there was no difference in microleakage between groups, however, group C showed the largest score after three-month storage. Although there seems to be no difference in microleakage between groups just after thermocycling, composite resin with highly concentrated initiation system or classical design (Camphoroquinone and Amine system) would be more desirable for minimizing microleakage after three-month storage.

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Microleakage;Composite resin;Photoinitiation;Electrical conductivity;Thermocycling

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