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The Effects of Tooth Bleaching Agents on Microhardness of Enamel in situ

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¹ÚÀ±¿ì, ¹Ú¼¼Èñ, ±èÁø¿ì, Á¶°æ¸ð,
¼Ò¼Ó »ó¼¼Á¤º¸
¹ÚÀ±¿ì ( Park Yoon-Woo ) - °­¸ª´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
¹Ú¼¼Èñ ( Park Se-Hee ) - °­¸ª´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
±èÁø¿ì ( Kim Jin-Woo ) - °­¸ª´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
Á¶°æ¸ð ( Cho Kyung-Mo ) - °­¸ª´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç

Abstract

º» ¿¬±¸´Â Ä¡¾Æ¹Ì¹é¿ë 2.6% hydrogen peroxide ºÎÂø´ë¿Í Åë»ó home bleaching¿ëÀ¸·Î ¾ÈÀüÇÏ´Ù°í ¾Ë·ÁÁø 10% carbamide peroxide ¹Ì¹éÁ©ÀÌ ¹ý¶ûÁú ¹Ì¼¼°æµµ¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ¹Ì¹éÀ» ÇÏÁö ¾ÊÀº °æ¿ì¿Í ºñ±³, Æò°¡ÇϱâÀ§ÇÏ¿© ½ÃÇàµÇ¾ú´Ù. ÃÖ±Ù¿¡ ¹ß°ÅÇÑ »ç¶÷ÀÇ »ó¾Ç ÀýÄ¡ 20°³¸¦ »ç¿ëÇÏ¿© °¡·Î, ¼¼·Î 2 mmÀÇ Á¤»ç°¢Çü Ä¡¾ÆÆíÀ» °¢ Ä¡¾Æ¿¡¼­ 3°³¾¿ Àý´Ü, äµæÇÑ ÈÄ ±³Á¤¿ë bracket¿¡ °íÁ¤ÇÏ¿© ½ÃÆíÀ» Á¦ÀÛÇÏ¿´´Ù. ÀÚ¿øÀÚ´Â 20¸íÀ» ¼±Á¤ÇÏ¿´°í, °¢°¢ÀÇ ÀÚ¿øÀÚÀÇ Ä¡¾Æ¿¡ µ¿ÀÏ Ä¡¾Æ¿¡¼­ Á¦ÀÛÇÑ ½ÃÆíÀÌ ºÎÂøµÈ bracketÀ» ¼ø¸é Áß¾Ó¿¡ ºÎÂøÇÏ¿´À¸¸ç »ó¾Ç ¿ìÃø ÃøÀýÄ¡¿¡ Á©À» ÀÌ¿ëÇÑ ±º (Opalescence tooth whitening gel, Ultradent Product Inc, South Jordan, USA), »ó¾Ç ¿ìÃø ÁßÀýÄ¡¿¡ ¹Ì¹éÀ» ÇÏÁö ¾ÊÀº ´ëÁ¶±º, »ó¾Ç ÁÂÃø ÁßÀýÄ¡¿¡ ºÎÂø´ë¸¦ ÀÌ¿ëÇÑ ±º (Claren, LG Household & Health Care, Seoul, Korea)À» ºÎÂø ½ÃÄ×´Ù. Á©À» ÀÌ¿ëÇÑ ±ºÀº bracketÀÌ ºÎÂøµÈ Ä¡¾Æ¿¡ ¸Â°Ô »ó¾Ç ¿ìÃø ÃøÀýÄ¡ºÎÅÍ ¿ìÃø ¼Ò±¸Ä¡±îÁö¸¦ µ¤´Â mouthguard tray¸¦ Á¦ÀÛÇÏ¿© ¸ÅÀÏ µ¿ÀϽ𣿡 2½Ã°£¾¿ 14ÀÏ µ¿¾È ¹Ì¹éÀ» ½ÃÇàÇÏ¿´À¸¸ç, ´ëÁ¶±ºÀº ºÎÂø 28ÀÏ µ¿¾È ¹Ì¹é Ä¡·á ¾øÀÌ ±¸°­ ³»¿¡ À§Ä¡½ÃÄ×´Ù. ºÎÂø´ë¸¦ ÀÌ¿ëÇÑ ±ºÀº bracketÀÇ ½ÃÆíÀ» µ¤À» ¼ö ÀÖ´Â Å©±â·Î »ó¾Ç¿ë ClarenÀ» Àý´ÜÇÏ¿© ¿ÀÀü, ¿ÀÈÄ °¢°¢ 30ºÐ¾¿ ÇÏ·ç µÎ ¹ø ºÎÂøÇÏ¿© 14ÀÏ µ¿¾È ¹Ì¹éÀ» ½ÃÇàÇÏ¿´´Ù. °¢±º ¸ðµÎ bracketºÎÂø Àü, ¹Ì¹é 14ÀÏ ÈÄ, À籤ȭ 14ÀÏ ÈÄÀÇ ¹Ì¼¼°æµµ¸¦ ÃøÁ¤ÇÏ¿´À¸¸ç ÃøÁ¤µÈ °ªÀ» ÀÌ¿ëÇÏ¿© ¹Ì¼¼°æµµ º¯È­ ¾ç»ó°ú º¯È­·®À» ºñ±³ Æò°¡ÇÏ¿´´Ù. Ä¡¾Æ¹Ì¹é¿ë 2.6% hydrogen peroxide ºÎÂø´ë¿Í Á© ÇüÅÂÀÇ 10% carbamide peroxide ¹Ì¹éÁ¦ÀÇ ¹Ì¹é Àü, ¹Ì¹éÈÄ, À籤ȭ ÈÄ ¹Ì¼¼°æµµ º¯È­ ¾ç»óÀÌ ¹Ì¹éÀ» ÇÏÁö ¾ÊÀº ´ëÁ¶±º°ú Â÷À̸¦ º¸ÀÌÁö ¾Ê¾ÒÀ¸¸ç (p > 0.05) ¹Ì¹é Àü°ú ¹Ì¹é ÈÄÀÇ ¹Ì¼¼°æµµÀÇ Â÷ÀÌ ¹Ì¹éÈÄ¿Í À籤ȭ ÈÄÀÇ ¹Ì¼¼°æµµÀÇ Â÷À̵µ À¯ÀÇÇÒ ¸¸ÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù (p > 0.05). µû¶ó¼­ ½ÃÁß¿¡ ÆǸŵǰí ÀÖ´Â whitening strip°ú ¹Ì¹é Á©Àº 14ÀÏ µ¿¾ÈÀÇ Åë»óÀûÀÎ ¹Ì¹é°úÁ¤ µ¿¾È ¹ý¶ûÁúÀÇ ¹Ì¼¼°æµµ¿¡ ¿µÇâÀ» ¹ÌÄ¡Áö ¾Ê´Â °ÍÀ¸·Î »ç·áµÈ´Ù.

The objective of this in situ study was to evaluate the effects of whitening strip (Claren, LG Household & Health Care Ltd, 2.6% hydrogen peroxide) and gel (Opalescence, Ultradent, 10% carbamide peroxide) on microhardness of enamel in comparison with untreated control. Extracted twenty human upper incisors were disinfected, cleaned, and labial side of each incisor sectioned into 3 fragments by 2 ¡¿ 2 mm size. After sectioning, labial sides of fragments were flattened and fixed to orthodontic bracket using flowable composite resin. Specimens prepared from each tooth were attached to the labial side of upper incisors of twenty volunteers one by one and treated by three different methods: (1) untreated control (2) treated with whitening strip for 14 days (3) treated with whitening gel for 14 days. Microhardness (Microhardness tester, Zwick) of each specimen was measured at the baseline of pre-treatment, immediate after bleaching treatment, 14 days after bleaching treatment and Knoop Hardness Number was determined. Microhardness changes of experimental groups were compared. The results show that tooth whitening strip and gel used in this study does not effect the microhardness of enamel during bleaching procedure.

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Whitening strip;Tooth whitening gel;Enamel;Microhardness

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