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Bleaching of stained resin using nitrogen doped-TiO2 nanoparticles
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¹®±Ù ( Moon Keun ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ±¸°»ýÈÇб³½Ç
Á¤»óºÀ ( Jung Sang-Bong ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ±¸°»ýÈÇб³½Ç
¼³È¿Á¤ ( Seol Hyo-Joung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
°Á¤¼÷ ( Kang Jung-Sook ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ±¸°»ýÈÇб³½Ç
±Ç¿ëÈÆ ( Kwon Yong-Hoon ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
Abstract
H2O2°¡ Ä¡¾Æ¹Ì¹é¿¡ ¸¹ÀÌ »ç¿ëµÇ°í ÀÖ´Ù. º» ¿¬±¸´Â ·¹ÀÌÀú ±¤Á¶»ç ÇÏ¿¡¼ Áú¼Ò°¡ µµÇÎµÈ ÀÌ»êÈƼź (N-doped TiO2) ³ª³ëÀÔÀÚ·ÎÂø»öµÈ ·¹ÁøÀ» ¾ó¸¶³ª ¹Ì¹é½ÃÅ°´ÂÁö¸¦ Æò°¡ÇÑ °ÍÀÌ´Ù. À̸¦ À§ÇÏ¿© ½Ã·á¸¦ Á¹-°Ö ¹æ¹ýÀ¸·Î Á¦Á¶ÇÏ°í ±¤Èí¼öµµ¿Í XRD¸¦ Æò°¡ÇÏ¿´´Ù.
¾×»óÀÇ methylene blue¿Í ºÐ¸»ÀÔÀÚ¸¦ ÇÔÀ¯ÇÑ Á©À» ÀÌ¿ëÇÏ¿© Âø»öµÈ ·¹ÁøÀÇ »öº¯È¸¦ ÃøÁ¤ÇÏ¿´´Ù. ±¤Á¶»ç¸¦ À§ÇÏ¿© ÆÄÀåÀÌ ´Ù¸¥ºûÀ» »ç¿ëÇÏ¿´´Ù. ±× °á°ú N-doped TiO2´Â º¸ÅëÀÇ TiO2¿¡ ºñÇÏ¿© 400 nm ÀÌÈÄ¿¡¼ ³ôÀº Èí¼öµµ¸¦ º¸¿´°í N-doped TiO2´Â TiN±¸Á¶¸¦ ±â¹ÝÀ¸·Î »õ·Î¿î ·çÆ¿±¸Á¶°¡ °üÂûµÇ¾ú´Ù. ·¹ÀÌÀú°¡ Á¶»çµÇ´Â ȯ°æ¿¡¼ methylene blue ¿ë¾×°ú Âø»öµÈ ·¹ÁøÀº 3% H2O2¸¦ÇÔÀ¯ÇÑ N-TiO2 ³ª³ëÀÔÀÚ¿¡ ÀÇÇؼ 15% H2O2º¸´Ù ´õ Å« Èí¼öµµ °¨¼Ò¿Í »öº¯È¸¦ º¸¿´´Ù.
There has been increasing use of the H2O2-based teeth bleaching agents. The purpose of this study was to evaluate thebleaching effectiveness of the laser irradiation combined with nitrogen doped-TiO2 nanoparticles (NPs) on the stained resin.
Nitrogen (N) doped-TiO2 NPs were prepared under sol-gel method. Light absorbance, X-ray diffraction patterns of NPs, andbleaching of methylene blue and stained resins were evaluated. For bleaching of stained resin, NPs-containing gel was used.
For irradiation, light of two different wavelengths was used. Unlike TiO2, N-TiO2 showed high absorbance after 400 nm.
N-TiO2, which have used TiN as a precursor, showed a new rutile phase at the TiN structure. For methylene blue solution,N-TiO2 with 3% H2O2 resulted in the greatest absorbance decrease after laser irradiation regardless of wavelength. For stainedresin test, N-TiO2 with 3% H2O2 resulted in the greatest color difference after laser irradiation, followed by group that usedN-TiO2 without 3% H2O2.
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¹Ì¹éÁ¦; N-doped TiO2; Èí¼öµµ; XRD; »öº¯È
Bleaching agent; N-doped TiO2; Absorbance; XRD; Color difference
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