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Effect of resin cement color on the color of commercially available zirconia crown

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ÇÏÇö½Â, ÀÓ¹ü¼ø, ÀÌ»óÈÆ,
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ÇÏÇö½Â ( Ha Hyeon-Seung ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú»ýüÀç·á°úÇб³½Ç
ÀÓ¹ü¼ø ( Lim Bum-Soon ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú»ýüÀç·á°úÇб³½Ç
ÀÌ»óÈÆ ( Lee Sang-Hoon ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú»ýüÀç·á°úÇб³½Ç

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº ·¹Áø½Ã¸àÆ® »ö»óÀÌ »ó¿ë Áö¸£ÄÚ´Ï¾Æ Å©¶ó¿îÀÇ »ö»ó¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Æò°¡ÇÏ´Â °ÍÀÌ´Ù. ¿¬±¸¿¡´Â NuSmile¨Þ ZR Zirconia LT Shade (LT) Áö¸£ÄÚ´Ï¾Æ¿Í RelyXTM U200 TR, A2, A3O (TR, A2, A3O) ·¹Áø½Ã¸àÆ®¸¦ »ç¿ëÇß´Ù. ÀÌ ¶§ Áö¸£ÄÚ´Ï¾Æ¿Í ·¹Áø½Ã¸àÆ® ½ÃÆíÀº Á÷°æ 5 mm, µÎ²² 1 mmÀÇ µð½ºÅ© ÇüÀ¸·Î °¢ Á¶°Ç ´ç ´Ù¼¸ °³¾¿ Á¦ÀÛÇß´Ù. CIE L*a*b* °ªÀº °ËÀº»ö°ú Èò»ö ¹è°æ¿¡¼­ ºÐ±¤ ±¤µµ°è¸¦ »ç¿ëÇØ Áö¸£ÄÚ´Ï¾Æ¿Í ·¹Áø½Ã¸àÆ® ´Üµ¶ Á¶°Ç°ú °ãÄ£ Á¶°Ç¿¡¼­ °¢°¢ ÃøÁ¤Çß´Ù. ·¹Áø½Ã¸àÆ® »ö»óÀÌ »ó¿ë Áö¸£ÄÚ´Ï¾Æ Å©¶ó¿îÀÇ »ö»ó¿¡ ¹ÌÄ¡´Â ¿µÇâÀº ÃøÁ¤µÈ °ªÀ» ÀÌ¿ëÇØ, ¹ÝÅõ¸íµµ(TP, translucency parameter), ´ëÁ¶ºñ(CR, contrast ratio), »öÂ÷(?E* ab)ÀÇ °è»êÀ» ÅëÇØ Æò°¡Çß´Ù. °¢ º¯¼ö¿¡ ´ëÇÑ Æò±Õ°ª°ú Ç¥ÁØÆíÂ÷´Â µ¿ÀÏÇÑ ½ÇÇ豺¿¡¼­ CIE L*a*b* °ªÀ» 3ȸ¾¿ ÃøÁ¤ÇÏ¿© ±¸Çß´Ù. ½ÇÇ豺ÀÇ Åë°èÀû À¯ÀǼºÀº ÀÏ¿ø¹èÄ¡ ºÐ»êºÐ¼®(one-way ANOVA)°ú Tukey-multiple comparisons test·Î °ËÁõÇß´Ù. ±× °á°ú, Áö¸£ÄÚ´Ï¾Æ ÇϹ濡 ·¹Áø½Ã¸àÆ®¸¦ °ãÄ£ Á¶°ÇÀÏ ¶§´Â Áö¸£ÄÚ´Ï¾Æ ´Üµ¶ Á¶°ÇÀÏ ¶§¿¡ ºñÇØ ¹ÝÅõ¸íµµ´Â °¨¼ÒÇß°í(p¡´0.05) ´ëÁ¶ºñ´Â Áõ°¡Çß´Ù. °ËÀº»ö ¹è°æ¿¡¼­ Áö¸£ÄÚ´Ï¾Æ¿Í Áö¸£ÄÚ´Ï¾Æ ÇϹ濡 ·¹Áø½Ã¸àÆ®¸¦ °ãÃÆÀ» ¶§ÀÇ »öÂ÷´Â ¸ðµç ½ÇÇ豺¿¡¼­ »öÀÇ º¯È­¸¦ ÀÎÁöÇÒ ¼ö ¾ø¾ú°í LT/A3O Á¶ÇÕ¿¡¼­ ÃÖ¼Ò°ªÀ» º¸¿´´Ù. ÇÑÆí, Èò»ö ¹è°æ¿¡¼­ Áö¸£ÄÚ´Ï¾Æ¿Í Áö¸£ÄÚ´Ï¾Æ ÇϹ濡 ·¹Áø½Ã¸àÆ®¸¦ °ãÃÆÀ»¶§ÀÇ »öÂ÷´Â LT/TR Á¶ÇÕ¿¡¼­ »öº¯È­¸¦ ÀÓ»óÀûÀ¸·Î Çã¿ëÇÒ ¼ö ÀÖ´Â °æ°è°ªÀ» º¸¿´´Ù. LT/A2 Á¶ÇÕ¿¡¼­´Â »öº¯È­¸¦ ÀÓ»óÀûÀ¸·Î Çã¿ëÇÒ ¼ö ¾ø¾ú°í, LT/A3O Á¶ÇÕ¿¡¼­´Â »öº¯È­¸¦ ÀÎÁöÇÒ ¼ö ÀÖ¾úÀ¸³ª ÀÓ»óÀûÀ¸·Î Çã¿ëÇÒ ¼ö ÀÖ´Â ¼öÁØÀ̾ú´Ù. ÀÌ»óÀÇ °á°ú¿Í °°ÀÌ º» ¿¬±¸ÀÇ ÇÑ°è ³»¿¡¼­´Â, Èò»ö ¹è°æÀÇ LT/A2 Á¶ÇÕ ¿Ü¿¡´Â Áö¸£ÄÚ´Ï¾Æ »ö»ó¿¡ ÀÓ»óÀûÀ¸·Î Çã¿ëÇÒ¼ö ¾ø´Â »öº¯È­¸¦ ÁÖ´Â ·¹Áø½Ã¸àÆ®´Â ¾ø¾ú´Ù. ±× Áß Áö¸£ÄÚ´Ï¾Æ »ö»ó¿¡ ÃÖ¼ÒÇÑÀÇ ¿µÇâÀ» ¹ÌÄ¡´Â ·¹Áø½Ã¸àÆ® »ö»óÀº A3O¿´´Ù. µû¶ó¼­, º» ¿¬±¸¿Í µ¿ÀÏÇÑ »ó¿ë Áö¸£ÄÚ´Ï¾Æ Å©¶ó¿îÀ» Ä¡¾Æ¿¡ Á¢ÂøÇÒ ¶§ »öº¯È­¸¦ ÃÖ¼ÒÈ­Çϱâ À§Çؼ­´Â A3O »ö»óÀÇ ·¹Áø½Ã¸àÆ® »ç¿ëÀÌ ÃßõµÈ´Ù.

The purpose of this study is to evaluate the effect of resin cement color on the color of commercially available zirconia crown. The zirconia and resin cements used for the experiment were NuSmile¨Þ ZR Zirconia LT Shade (LT), RelyXTM U200 TR, A2, and A3O (TR, A2, A3O). The disks of zirconia and resin cements with diameters of 5 mm and thicknesses of 1 mm were prepared. Five disks were made for each specimen. The CIE L*a*b* values of zirconia, resin cements and the combinations thereof were measured on black and white backgrounds, respectively, using a spectrophotometer. The color effect of resin cement on the color of the zirconia crown was evaluated by calculating translucency parameter (TP), contrast ratio (CR), and color differences (?E* ab) based on the measured CIE L*a*b* values.The statistical significances were verified by one-way ANOVA and the Tukey-multiple comparisons tests. As a result, the TP and CR values were decreased (p¡´0.05) and increased, respectively, in the combination of zirconia and resin cement disks compared to zirconia disk per se. When using the black background, the ?E*ab values between zirconia and the combination of the zirconia and three resin cement disks were imperceptible level. The A3O showed the lowest ? E*ab value among three resin cements. When using the white background, the ?E*ab values between zirconia and the combination of zirconia and TR resin cement (LT/TR) disks showed acceptable level. However, the ? E*ab values between zirconia and the combination of zirconia and A2 resin cement (LT/A2) disks showed unacceptable level. Meanwhile, the ?E*ab values between zirconia and the combination of zirconia and A3O resin cement (LT/A3O) disks showed perceptible but acceptable level. Within the limits of this study, the colors of resin cements did not cause unacceptable color changes of zirconia except the combination of LT/A2 on the white background. The resin cement that gave the least color changes to zirconia was A3O. This means that the resin cement A3O is recommended to use for minimizing color changes when cementing commercially available zirconia crown to tooth.

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Color difference; Contrast ratio; Resin cement; Translucency parameter; Zirconia

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