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Color comparison of glaze-treated multi-coloured lithium disilicate and zirconia

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Ȳº° ( Hwang Byeol ) - Chonbuk National University School of Dentistry Department of Dental Biomaterials
ÁöÁ¤Èñ ( Ji Jeong-Hui ) - Chonbuk National University School of Dentistry Department of Dental Biomaterials
¹Úö¼ö ( Park Cheol-Soo ) - Chonbuk National University School of Dentistry Department of Orthodontics
½ÅÀç¿ì ( Shin Jae-Woo ) - Chonbuk National University School of Dentistry Department of Dental Biomaterials
ÀÌÁ¤È¯ ( Lee Jung-Hwan ) - Gwangju Health University Department of Dental Laboratory Technology
À̹ÎÈ£ ( Lee Min-Ho ) - Chonbuk National University School of Dentistry Department of Dental Biomaterials
¹èżº ( Bae Tae-Sung ) - Chonbuk National University School of Dentistry Department of Dental Biomaterials

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº ´Ù»öÀÇ Áö¸£ÄÚ´Ï¾Æ ºí·Ï°ú ¸®Æ¬ µð½Ç¸®ÄÉÀÌÆ® ºí·ÏÀÇ ±Û·¹ÀÌÁî 󸮰¡ ±¤ÇÐÀû Ư¼º¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Á¶»çÇÏ´Â °ÍÀÌ´Ù. Áö¸£ÄڴϾưè 50% ÀÔ¹æÁ¤ ÇÔÀ¯ Ultra Translucent Multi-Layered (UTML) disc¿Í ¸®Æ¬ µð½Ç¸®ÄÉÀÌÆ®°è Amber Mill Direct (AMD) blockÀ» Å©¶ó¿îÀÇ »óÃþºÎ(T), Áß¾ÓºÎ(M), ÇÏÃþºÎ(B)¸¦ »óÁ¤ÇÏ¿© ÃÖÁ¾ µÎ²²°¡ 1.2 mm°¡ µÇµµ·Ï ÁغñÇÏ¿´´Ù. ¼¼ Á¾·ùÀÇ paste glaze (InSync¨Þ Glaze Paste, IPS E.max Ceram Glaze Paste, Amber Ceram G7 Glaze Paste)¸¦ ½ÃÆíÀÇ Ç¥¸é¿¡ ±ÕÀÏÇÑ µÎ²²·Î Àû¿ëÇÏ°í ¼Ò¼ºÇÏ¿´´Ù. CIE L*, a*, b* °ªÀº ºÐ±¤ ±¤µµ°è¸¦ »ç¿ëÇÏ¿© °¢ ½ÃÆíÀÇ »óÃþºÎ, Á߾ӺΠ¹× ÇÏÃþºÎ¿¡¼­ °¢°¢ 3ȸ¾¿ ÃøÁ¤ÇÏ¿© ºÐ¼®ÇÏ¿´´Ù. HR FE-SEMÀ» ÀÌ¿ëÇÏ¿© ¸ðÀç¿Í ±Û·¹ÀÌÁî Ãþ°úÀÇ °áÇÕ°è¸éÀ» °üÂûÇÏ¿´´Ù. ±Û·¹ÀÌÁî ó¸®ÇÑ ½ÇÇ豺¿¡¼­´Â L* °ªÀº Áõ°¡ÇÏ°í, a* °ª°ú b* °ªÀº °¨¼ÒÇÏ¿´´Ù. ¹«Ã³¸® ±º¿¡¼­ ÃøÁ¤µÈ ¹ÝÅõ¸íµµ °ªÀº UTMLº¸´Ù AMD±º¿¡¼­ Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÏ°Ô ´õ ³ô¾Ò´Ù(P<0.05). ¹ÝÅõ¸íµµ´Â UTML±º¿¡¼­´Â ±Û·¹ÀÌÁî ó¸® ÀüÈÄ À¯ÀÇÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾ÒÁö¸¸(P>0.05), AMD±ºÀÇ ±Û·¹ÀÌÁî ó¸® ÈÄ ¹«Ã³¸® ±º¿¡ ºñÇØ À¯ÀÇÇÏ°Ô °¨¼ÒµÇ¾ú´Ù(P<0.05). ´ëÁ¶ºñ´Â ±Û·¹ÀÌÁî ó¸® ÈÄ ¹«Ã³¸® ±º¿¡ ºñÇØ Àü¹ÝÀûÀ¸·Î Áõ°¡ÇÑ ¾ç»óÀ» º¸¿´´Ù. °á·ÐÀûÀ¸·Î, ±Û·¹ÀÌÁî 󸮴 ¼¼¶ó¹Í ¼öº¹¹° Á¦ÀÛÀÇ ¸¶Áö¸· ´Ü°è·Î¼­ ±¤ÇÐÀû Ư¼º¿¡ ¿µÇâÀ» ÁÙ ¼ö ÀÖÀ¸¹Ç·Î Ä¡°ú±â°ø»ç°¡ ¿øÇÏ´Â »öÁ¶¸¦ ÀçÇöÇÏ°íÀÚ ÇÒ ¶§ ±Û·¹ÀÌÁîÀÇ ¼±ÅÃÀº Áß¿äÇÏ°Ô °í·ÁµÇ¾î¾ß ÇÒ °ÍÀ¸·Î »ý°¢µÈ´Ù.

The purpose of this study was to investigate the effect of glazing treatment of multi-colored zirconia disc and lithium disilicate block on the optical properties. From an Ultra Translucent Multi-Layered (UTML) disc containing 50% cubic crystal and a lithium disilicate-based Amber Mill Direct (AMD) block, the 1.2 mm thick specimens of the upper layer (T), the center (M), and the lower layer (B) were prepared. Three types of paste glaze of InSync Glaze Paste, IPS E.max Ceram Glaze Paste, and Amber Ceram G7 Glaze Paste were applied and fired to a uniform thickness on the surface of the specimen. CIE L*, a*, b* values were measured using a spectrophotometer and contrast and translucency were calculated. The bonding interface with the glaze layer was observed using HR FE-SEM. In the glazed groups, L* value increased, but a* value and b* value decreased. The translucency value measured in the untreated group was statically higher in the AMD groups than in UTML groups (P<0.05). The translucency did not show a significant difference before and after glazing treatment in the UTML group (P>0.05), but significantly decreased compared to the untreated group after glazing treatment in the AMD group (P<0.05). The contrast ratios generally increased after glaze treatment compared to the untreated group. Since the glaze treatment can affect the optical properties of ceramic restorations, the choice of glaze should be considered important for the desired color by the dental technician.

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Zirconia; Lithium disilicate; Optical properties; Glaze

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