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Microleakage and Shear Bond Strength of Biodentine at Different Setting Time
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Abstract
ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº mineral tiroxide aggregateÀÇ ±ä °æȽð£°ú Ä¡¾Æº¯»ö µîÀÇ ´ÜÁ¡À¸·Î ÀÎÇØ À̸¦ ´ëüÇÏ°íÀÚ ÃÖ±Ù ÁÖ¸ñ¹Þ°í ÀÖ´ÂÀç·áÀÎ tricalcium silicate¸¦ ±â¹ÝÀ¸·Î ÇÑ Ä¡¼öº¹Á¶Á¦ Áß BiodentineÀÇ ¹Ì¼¼´©Ãâ°ú ÃÖÁ¾¼öº¹Á¦·Î °¡Àå ¸¹ÀÌ ¾²ÀÌ´Â composite resin°£ÀÇ Àü´Ü°áÇÕ°µµ¿¡ ´ëÇÏ¿© °æȽ𣿡 µû¸¥ Â÷À̸¦ ºñ±³ Æò°¡ÇÏ´Â °ÍÀÌ´Ù. ¹Ì¼¼´©Ãâ Æò°¡¸¦ À§ÇØ ¼Ò Ä¡¾Æ 70°³¸¦ ÀÌ¿ëÇÏ¿© ¼ø¸é¿¡ ¿Íµ¿À» Çü¼ºÇÑ ÈÄ BiodentineÀ» ÃæÀüÇÏ°í ¹«ÀÛÀ§·Î 10°³¾¿ ÇÏÀ§ ±ºÀ¸·Î ³ª´©¾î 12ºÐ, 45ºÐ, 24½Ã°£, 48½Ã°£, 1ÁÖÀÏ, 2ÁÖÀÏ, 1°³¿ù·Î °æȽð£À» ´Þ¸®ÇÑ ÈÄ »ó¹æ¿¡ composite resinÀ» Àû¿ëÇÏ¿© ½ÃÆíÀ» Á¦ÀÛÇÏ¿´´Ù. ¹Ì¼¼´©Ãâ Æò°¡¸¦ À§ÇØ Ç¥º»À» 24½Ã°£ µ¿¾È 0.5% fuchsin ¿ë¾×¿¡ ħÀûÇÑ µÚ, ¼ö¼¼ÇÏ°í °ÇÁ¶ÇÏ¿© °¢ Ç¥º»À» ¼öÁÖ ÇÏ µð½ºÅ©¸¦ ÀÌ¿ëÇØ Àý¹ÝÀ¸·Î ³ª´©¾î 20¹èÀÇ ºñÀ²·Î ½ÇüÇö¹Ì°æ(Olympus SZ61, Olympus, Tokyo, Japan)À» »ç¿ëÇÏ¿© °üÂûÇÏ¿´´Ù. Àü´Ü°áÇÕ°µµ Æò°¡¸¦ À§ÇØ Á߽ɱ¸¸¦ °¡Áø ¾ÆÅ©¸± ·¹Áø ºí·ÏÀ» 210°³¸¦ Á¦ÀÛÇÏ°í Á߽ɱ¸¿¡ BiodentineÀ» ä¿î ÈÄ °¢°¢ 30°³¾¿ 7°³ ±ºÀ¸·Î ³ª´©¾î 12ºÐ, 45ºÐ, 24½Ã°£, 48½Ã°£, 1ÁÖÀÏ, 2ÁÖÀÏ, 1°³¿ù °æȽ𣠰æ°ú ÈÄ »ó¹æ¿¡composite resinÀ» Àû¿ëÇÏ¿© ½ÃÆíÀ» Á¦ÀÛÇÏ¿´´Ù. Universal testing machineÀ» ÀÌ¿ëÇÏ¿© °æȽ𣿡 µû¸¥ Àü´Ü°áÇÕ°µµ¸¦ ÃøÁ¤ÇÏ¿´´Ù. ¿¬±¸°á°ú, ¹Ì¼¼´©Ãâ¿¡ ÀÖ¾î¼ 24½Ã°£ ÀÌ»ó Biodentine °æÈ ÈÄ »ó¹æ¿¡ composite resin ¼öº¹À» ½ÃÇàÇÑ °æ¿ì ¹Ì¼¼´©ÃâÀ» ÃÖ¼ÒÈ Çϴ°ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¶ÇÇÑ Àü´Ü°áÇÕ°µµ¿¡ À־µ BiodentineÀÇ °æȽð£ÀÌ 24½Ã°£ ÀÌ»óÀÏ °æ¿ì composite resinÀÇ ÁßÇÕ¼öÃàÀ» »ó¼âÇÒ¼ö ÀÖ´Â Àü´Ü°áÇÕ°µµ°¡ ÃøÁ¤µÇ¾ú´Ù. composite resin ¼öº¹ Àü BiodentineÀ» 24½Ã°£ ÀÌ»ó °æȽÃÅ°´Â °ÍÀÌ ÀÓ»óÀûÀ¸·Î ´õ ³ªÀº °á°ú¸¦³ªÅ¸³¾ °ÍÀÌ´Ù.
The purposes of this study were to evaluate microleakage of Biodentine, one of the tricalcium silicate based pulpcapping materials, and to compare the shear bond strength between composite resin and Biodentine with different setting times. For microleakage evaluation, 70 bovine teeth were used. Cavities were formed on the labial surfaces and filled with Biodentine. The teeth were divided into seven groups, each consisting of 10 teeth. The specimens were prepared by applying the composite resin on the upper side after different setting times. To evaluate shear bond strength, 210 acrylic resin blocks with central grooves were prepared, and the grooves were filled with Biodentine. The acrylic resin blocks were divided into seven groups of 30 specimens each, and the specimens were prepared by applying the composite resin on the upper side after different setting times. In samples with setting time of 24 hours or longer period, the microleakage between composite resin and Biodentine was reduced significantly while the shear bond strength increased to offset the polymerization shrinkage of the composite resin. Setting Biodentine for more than 24 hours before composite resin restoration would lead to more favorable clinical result.
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Biodentine; Microleakage; Pulp capping material; Setting time; Shear bond strength
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