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THE INFLUENCE OF THE VITAL BLEACHING AGENTS ON TRANSLUCENCY OF THE BOVINE ENAMEL

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Abstract

º» ¿¬±¸¿¡¼­´Â ÇöÀç ÀÓ»ó¿¡¼­ home bleachingÀ» À§ÇØ »ç¿ëµÇ°í Àִ ǥ¹é Àç·áµéÀÌ Ä¡¾Æ ¹ý¶ûÁúÀÇ Åõ¸íµµ¿¡ ¾î¶°ÇÑ º¯È­¸¦ ÀÏÀ¸Å°´ÂÁö °íÂûÇØ º¸°íÀÚ ½ÃÇàÇÏ¿´´Ù. ½ÇÇè ´ë»óÀ¸·Î´Â ÇÏ·ç Àü ¹ß°ÅÇÑ ¿ìÄ¡ (bovine tooth)¸¦ »ç¿ëÇÏ¿´´Ù. Ä¡¾ÆÀÇ ¼ø¸é¿¡ ¼öÁ÷µÇ°Ô ´ÙÀ̾Ƹóµå µå¸±À» ÀÌ¿ëÇØ ¼öÁÖ ÇÏ¿¡¼­ Á÷°æ 6 mmÀÇ ¿øÅëÇü Ä¡¾Æ ½ÃÆíÀ» ¸¸µé¾î ¼ø¸éÀÌ ³ëÃâµÈ »óÅ·ΠÅõ¸íÇÑ ¾ÆÅ©¸¯ ·¹Áø¿¡ Æ÷¸ÅÇÑ ÈÄ, low speed diamond saw (Isomat, Buehler Co., USA)¸¦ »ç¿ëÇÏ¿© 1.2 mm µÎ²²·Î Àý´ÜÇÏ¿´´Ù. Àý´ÜµÈ ½ÃÆíÀº ¼ø¸éÀ» ¸ÕÀú ÆíÆòÇÏ°Ô ¿¬¸¶ÇÏ°í,Àý´ÜµÈ ¸éÀ» ¿¬¸¶ÇÏ¿© µÎ²² 1 mmÀÇ ½ÃÆíÀ» ¿Ï¼ºÇÏ¿´´Ù. ¿Ï¼ºµÈ ½ÃÆí(¿ìÄ¡ 25°³)À» ¹«ÀÛÀ§·Î ÃßÃâÇÏ¿© 3°³ÀÇ ±×·ìÀ¸·Î ³ª´©°í ³ª¸ÓÁö´Â ´ëÁ¶±ºÀ¸·Î ÇÏ¿´´Ù. Opalescence$^{ (10% carbamide peroxide, Ultradent, Milford, USA), Rembrandt$^{ (10% carbamide peroxide, DenMat, USA) ¹× Opalescence$^{ F(15% carbamide peroxide with fluoride, Ultradent)¸¦ ½ÃÆíÀÇ ¼ø¸é¿¡ 1ÁÖÀÏ µ¿¾È Àû¿ë (Ç¥¹éÁ¦´Â 24½Ã°£¸¶´Ù ±³Ã¼)ÇÏ¿´°í, ¼³Ãø¸éÀº Áõ·ù¼ö¸¦ Àû½Å °ÅÁî¿¡ Á¢ÃËµÈ »óÅ·Πº¸°üÇÏ¿´´Ù Ç¥¹éÁ¦¸¦ Àû¿ëÇϱâ Àü°ú Àû¿ë 3, 5, 7ÀÏ°¿¡ ½ÃÆíÀÇ »ïÀÚ±ØÄ¡ X, Y, Z °ªÀ» »öä»öÂ÷°è (Color ¡¯¡¯ Color Differencemeter, Model TC-6FX, Tokyo Denshoku Co., Japan)·Î ¹é»ö ¹è°æÆÇ°ú Èæ»ö ¹è°æÆÇ »ó¿¡¼­ ÃøÁ¤ÇÏ¿´´Ù ¹é»ö ¹è°æÆÇ°ú Èæ»ö ¹è°æÆÇ »ó¿¡¼­ ÃøÁ¤µÈ Y°ªÀÇ Æò±Õ°ªÀ» ÀÌ¿ëÇØ contrast ratio¸¦ °è»êÇÏ¿´´Ù ¾ò¾îÁø °ªÀ» One Way Repeated Measured ANOVA¸¦ ÀÌ¿ëÇÏ¿© Åë°è ó¸®ÇÑ °á°ú 10$\%$ Opalescence$^{óġ±º, 15$\%$ Opalescence$^{-Fóġ±º ¹× ´ëÁ¶±º¿¡¼­´Â Åë°èÀûÀ¸·Î À¯ÀÇÇÒ¸¸ÇÑ Áõ°¨À» º¸ÀÌÁö ¾Ê¾Ò°í, Rembrandt$^{óġ±º¿¡¼­´Â Contrast ratio°¡ Áõ°¡ÇÏ¿´´Ù (p < 0.01) .

This study was done to evaluate whether vital bleaching agents could influence on the translucency of the bovine enamel. The anterior bovine teeth that were extracted one day before and without any gross discoloration were obtained and then were preserved in physiologic saline. 6 mm cylindrical tooth specimens were fabricated with diamond puncher perpendicularly on labial surface of bovine tooth. After embedded in transparent acrylic resin with labial surface being exposed, they were cut to a thickness of 1.2 mm with low speed diamond saw (Isomat, Buehler Co., Lake Bluff, IL, USA). They were smoothly ground to 1 mm thickness of enamel with sandpaper. 24 specimens were randomly divided into 3 groups and control group respectively. Opalescence (10$\%$ carbamide peroxide, Ultradent, South Jordan, USA), Rembrandt (10$\%$ carbamide peroxide, DenMat, USA) and Opalescence F (15$\%$ carbamide peroxide with fluoride, Ultradent, USA) were applied on labial sides of the bovine enamel for 7 days (bleaching agents were reapplied every 24 hours) and the opposite surface was contacted to cotton that soaked in distilled water. The control group was soaked in distilled water. Three stimulus value X, Y and Z were evaluated with colorimeter (Color ¡¯¡¯ Color Differencerneter, Model TC-6FX, Tokyo Denshoku Co., Japan) on the labial surface of all specimen three times on white and black background plate before the bleaching agents were applied and on 3rd, 5th and 7th day after applied. The degree of translucency was normally assessed by measuring the inverse property, opacity (contrast ratio). 10$\%$ Opalescence, 15$\%$ Opalescence-F, and control group showed no significant variation in the translucency of bovine enamel, However Rembrandt decreased the translucency of it (p < 0.01). [J Kor Acad Cons Dent 30(3):178-183, 2005]

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