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EFFECT OF ETCHING TIME ON ENAMEL SURFACE ROUGHNESS: CONFOCAL LASER SCANNING MICROSCOPIC STUDY

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Abstract

°øÃÊÁ¡ ·¹ÀÌÀúÁÖ»çÇö¹Ì°æ(confocal laser scanning microscopy)À» ÀÌ¿ëÇÏ¿© »êºÎ½Ä½Ã°£¿¡ µû¸¥ ¹ý¶ûÁúÇ¥¸éÀÇ º¯È­¾ç»óÀ» °üÂûÇÏ°í, Á¢Âø¿¡ ÇÊ¿äÇÑ Ç¥¸éÀÇ ¾ç»óÀ» ¾òÀ» ¼ö ÀÖÀ¸¸é¼­µµ ¹ý¶ûÁúÀÇ ¼Ò½ÇÀ» ÃÖ¼ÒÈ­ÇÒ ¼ö ÀÖ´Â »êºÎ½Ä½Ã°£À» ÃøÁ¤ÇÏ°íÀÚ, 60°³ÀÇ ¹ßÄ¡µÈ °ÇÀü´ë±¸Ä¡¸¦ Çù¸éÀÌ ³ëÃâµÇµµ·Ï ¾ÆÅ©¸±ºÀ¿¡ ÀÚ°¡ÁßÇÕ·¹ÁøÀ» ÀÌ¿ëÇÏ¿© ¸Å¸ôÇÑ µÚ, 220, 500, 800, 1000, 2000, 4000¹ø SiC ¿¬¸¶Áö¸¦ ÀÌ¿ëÇÏ¸ç ¼øÂ÷ÀûÀ¸·Î ¿¬¸¶ÇÏ¿´´Ù. ¿¬¸¶µÈ ½ÃÆíÀ» ÀÓÀÇ·Î 10°³¾¿ 6°³ÀÇ ±ºÀ¸·Î ³ª´©°í, 37% ÀλêÀ¸·Î 10ÃÊ, 20ÃÊ, 30ÃÊ, 40ÃÊ, 50ÃÊ, 60ÃÊ°£ »êºÎ½ÄÇÏ°í ÃæºÐÇÑ ¹°·Î ¼¼Ã´ÇÑ ÈÄ air syringe·Î °ÇÁ¶½ÃŲ ÈÄ, °øÃÊÁ¡ ·¹ÀÌÀúÁÖ»çÇö¹Ì°æÀ¸·Î Ç¥¸é¿µ»óÀ» ¾òÀº ÈÄ Á¶µµºÐ¼®À» ½ÃÇàÇÏ°í, 5°³ÀÇ °èÃøÄ¡(Sa, Sq, Sz, Sdr, Ra)¸¦ Åë°èºÐ¼®ÇÑ °á°ú, ¸ðµÎ 30ÃÊ »êºÎ½ÄÀÇ °æ¿ì°¡ °¡Àå ³ôÀº Á¶µµ¸¦ ³ªÅ¸³»¾ú´Ù. ƯÈ÷ SzÀÇ °æ¿ì 10ÃÊÀÇ °æ¿ì°¡ Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô ³·Àº °ªÀ» º¸¿´À¸¸ç, 30ÃÊÀÇ °æ¿ì Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô ³ôÀº °ªÀ» º¸¿´´Ù(p<0.05).
In order to evaluate the sufficient etching time for successful bonding and also minimizing unnecessary miner-al loss, the enamel surface roughness analysis was performed using confocal laser scanning microscopy. Sixty extracted sound human molar teeth were imbedded in the center of acrylic cylinder using self-curing clear resin ex-posing buccal surface, and then polished with series of SiC paper(220, 500, 800, 1000, 2000, 4000 grit). Each specimen was randomly assigned to six groups(N=10) . 37% phosphoric acid was applied to the polished tooth surface for 10, 20, 30, 40, 50, 60 seconds respectively and washed with copious water. After the surface roughness analysis, five roughness parameters(Sa, Sq, Sz, Sdr, Ra) were statistically analysed by ANOVA and Duncan post hoc test. We found that the all five parameters had higher roughness value in 30 seconds etching time, especially parameter Sz showed the lowest value in 10 seconds etching time and the highest value in 30 seconds etching time compared with the other etching times(p(0.05) .

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¹ý¶ûÁú;Ç¥¸éÁ¶µµ;»êºÎ½Ä½Ã°£;°øÃÊÁ¡ ·¹ÀÌÀúÁÖ»çÇö¹Ì°æ;Enamel;Surface roughness;Etching time;Confocal laser scanning microscopy

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