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Effects of chromium chloride addition on coloration and mechanical properties of 3Y-TZP
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ÀÓÇöÇÊ ( Lim Hyun-Pil ) - Àü³²´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
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À̰汸 ( Lee Kyung-Gu ) - ŸÀÌŸ´½ Ư¼öÇձݺÎÇ°°³¹ßÁö¿ø¼¾ÅÍ
ÀÓÅ°ü ( Lim Tae-Kwan ) - Àü³²´ëÇб³ °ø°ú´ëÇÐ ½Å¼ÒÀç°øÇкÎ
À̵µÀç ( Lee Doh-Jae ) - Àü³²´ëÇб³ °ø°ú´ëÇÐ ½Å¼ÒÀç°øÇкÎ
KMID : 0362420110490020120
Abstract
¿¬±¸ ¸ñÀû: º» ¿¬±¸ÀÇ ¸ñÀûÀº »ö¼ÒüÀÎ Å©·Ò¿°È¹°À» Áö¸£ÄڴϾƿ¡ ÷°¡ÇÔÀ¸·Î½á Áö¸£ÄڴϾÆÀÇ »ö»ó ¹× ¹°¸®Àû ¼ºÁú, ±×¸®°í ¹Ì¼¼±¸Á¶°¡ ¾î¶»°Ô º¯ÈÇÏ´ÂÁö ¾Ë¾Æº¸°íÀÚ ÇÑ´Ù.
¿¬±¸ Àç·á ¹× ¹æ¹ý: Å©·Ò¿°È¹°ÀÇ ÇÔ·®ÀÌ Áö¸£ÄÚ´Ï¾Æ ºÐ¸»¿¡ °¢°¢ 0.06, 0.12, 0.25 wt%°¡ µÇµµ·Ï Ãø·®ÇÏ°í ¾ËÄڿÿ¡ ³ì¿© ¾×»ó»óÅÂÀÇ Å©·Ò¿°È¹°À» ÁغñÇÏ¿´´Ù. Áö¸£ÄÚ´Ï¾Æ ºÐ¸»°ú °¢°¢ÀÇ ¾×»ó»óÅÂÀÇ Å©·Ò¿°È¹°À» È¥ÇÕÇÏ°í È¥ÇÕµÈ ºÐ¸»À» ÀÌ¿ëÇÏ¿© µð½ºÅ©ÇüÅÂÀÇ Áö¸£ÄÚ´Ï¾Æ ½ÃÆíÀ» Á¦ÀÛÇÏ¿´´Ù. Á¦ÀÛµÈ ½ÃÆíÀº 1450¡É¿¡¼ ¿ÏÀü¼Ò°á ÈÄ »ö»ó ¹× ¹°¸®Àû ¼ºÁú, ±×¸®°í ¹Ì¼¼±¸Á¶¸¦ °üÂûÇÏ¿´´Ù. »ö»óÀº ºÐ±¤Ãø»öÀåÄ¡¸¦ ÀÌ¿ëÇÏ¿© ±¹Á¦Á¶¸íÀ§¿øȸ (CIE) ISO ±âÁØÀÎ D65 ±¤¿ø, SCE ¹æ½ÄÀ¸·Î ÃøÁ¤ÇÏ¿© L*, C*, a*, b* °ªÀ¸·Î ºÐ¼®ÇÏ¿´´Ù. ¹Ðµµ´Â ¾Æ¸£Å°¸Þµ¥½º ¹ýÀ¸·Î ÃøÁ¤ÇÏ¿´°í, ÁÖ»çÀüÀÚÇö¹Ì°æ°ú X¼± ȸÀý ºÐ¼®±â¸¦ ÀÌ¿ëÇÏ¿© ½ÃÆíÀÇ ¹Ì¼¼±¸Á¶ ¹× °áÁ¤»óÀ» °üÂûÇÏ¿´´Ù. Æı«ÀμºÀº ¾ÐÈç Çü¼º¹ý(Vickers indentation¹ý)À» ÀÌ¿ëÇÏ¿© ½ÃÆí¿¡ ¾ÐÈç Çü¼º ÈÄ, ±¤ÇÐÇö¹Ì°æÀ¸·Î ¾ÐÈçÀÇ Å©±â¸¦ ÃøÁ¤ÇÏ°í À̸¦ ÀÌ¿ëÇÏ¿© Æı«ÀμºÀ» ±¸ÇÏ¿´´Ù. °á°ú´Â ÀÏ¿ø¹èÄ¡ºÐ»êºÐ¼® (one-way ANOVA)À¸·Î Åë°èó¸® ÇÏ¿´°í, Tukey test·Î »çÈÄ °ËÁ¤ÇÏ¿´´Ù.
°á°ú: 1. Å©·Ò¿°È¹°À» ÷°¡ÇÏ¿© Áö¸£ÄڴϾÆÀÇ »ö»óÀ» Á¶ÀýÇÒ ¼ö ÀÖÀ½À» È®ÀÎÇÏ¿´À¸¸ç, Å©·Ò¿°È¹° ÷°¡ ÇÔ·®ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó Áö¸£ÄÚ´Ï¾Æ »ö»óÀº ¹é»ö°èÅëÀÇ °¥»ö¿¡¼ £Àº »öÀÇ °¥»öÀ¸·Î º¯ÇÏ¿´´Ù. 2. Å©·Ò¿°È¹°ÀÇ Ã·°¡´Â ½ÃÆíÀÇ ¹Ðµµ¸¦ Á¡Á¡ °¨¼Ò½ÃÄ×À¸¸ç, Å©·Ò¿°È¹°ÀÌ Ã·°¡µÇÁö ¾ÊÀº ½ÃÆí°ú ºñ±³ ½Ã, Å©·Ò¿°È¹°ÀÇ Ã·°¡·®ÀÌ Áõ°¡ÇÒ ¼ö·Ï Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÑ Â÷À̸¦ º¸¿´´Ù (P< .05). 3. Å©·Ò¿°È¹°ÀÌ Ã·°¡µÈ ½ÃÆíÀº ÷°¡µÇÁö ¾Ê´Â ½ÃÆí¿¡ ºñÇØ °áÁ¤¸³ Å©±â°¡ Áõ°¡ÇÏ¿´´Ù. 4. X-¼± ȸÀý ºÐ¼®°á°ú, Å©·Ò¿°È¹°ÀÇ Ã·°¡ ¿©ºÎ¿Í ÷°¡ ÇÔ·®¿¡ »ó°ü¾øÀÌ Áö¸£ÄÚ´Ï¾Æ °áÁ¤»óÀÇ Â÷ÀÌÁ¡Àº °üÂûµÇÁö ¾Ê¾Ò´Ù. 5. Áö¸£ÄڴϾƿ¡ Å©·Ò¿°È¹°À» ÷°¡ ½Ã Å©·Ò¿°È¹°ÀÇ Ã·°¡ ÇÔ·®¿¡ µû¶ó Æı«Àμº °ªÀº °¨¼ÒÇÏ¿´°í, ƯÈ÷ 0.25 wt%ÀÇ Å©·Ò¿°È¹°À» ÷°¡ ½Ã °¡Àå ³·Àº Æı«Àμº °ªÀ» º¸¿´´Ù (P< .05).
°á·Ð: ÀÌ»óÀÇ °á°ú·Î Å©·Ò¿°È¹°À» ¾×ü»óÅ·Π÷°¡ÇÏ¿© Áö¸£ÄڴϾÆÀÇ »ö»óÀ» Á¶ÀýÇÒ ¼ö ÀÖÀ½À» È®ÀÎÇÏ¿´À¸¸ç Á¦ÀÛÇÑ À¯»ö Áö¸£ÄڴϾÆÀÇ »ö»óÀº ÀÚ¿¬Ä¡¾Æ »ö»ó°ú ´Ù¼Ò Â÷ÀÌ°¡ ÀÖÁö¸¸, º» ¼ÒÀç´Â ÀÓ»ó¿¡¼ »ç¿ëµÇ´Â ¿ÏÀüµµÀç°ü ÄÚ¾î (Core) Àç·á·Î½á »ç¿ëÇÒ ¼ö ÀÖÀ» °ÍÀ¸·Î »ý°¢ÇÑ´Ù.
PURPOSE: The purpose of this study was to examine the effects of chromium chloride addition on coloration, mechanical property and microstructure of 3Y-TZP.
MATERIALS AND METHODS: Chromium chloride was weighed as 0.06, 0.12, and 0.25 wt% and each measured amount was dissolved in alcohol. ZrO2 powder was mixed with each of the individual slurry to prepare chromium doped zirconia specimen. The color, physical properties and microstructure were observed after the zirconia specimen were sintered at 1450¡É. In order to evaluate the color, spectrophotometer was used to analyze the value of L*, C*, a* and b*, after placing the specimen on a white plate, and measured according to the International Commission on Illumination (CIE) standard, Illuminant D65 and SCE system. The density was measured in the Archimedes method, while microstructures were evaluated by using the scanning electron microscopy (SEM) and XRD. Fracture toughness was calculated Vickers indentation method and indentation size was measured by using the optical microscope. The data were analyzed with 1-way ANOVA test (¥á= 0.05). The Tukey multiple comparison test was used for post hoc analysis.
RESULTS: 1. Chromium chloride rendered zirconia a brownish color. While chromium chloride content was increased, the color of zirconia was changed from brownish to brownish-red. 2. Chromium chloride content was increased; density of the specimen was decreased. 3. More chromium chloride in the ratio showed increase size of grains. 4. But the addition of chromium chloride did not affect the crystal phase of zirconia, and all specimens showed tetragonal phase. 5. The chromium chloride in zirconia did not showed statistically significant difference in fracture toughness, but addition of 0.25 wt% showed a statistically significant difference (P<.05).
CONCLUSION: Based on the above results, this study suggests that chromium chlorides can make colored zirconia while adding in a liquid form. The new colored zirconia showed a slight difference in color to that of the natural tooth, nevertheless this material can be used as an all ceramic core material.
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Chromium chloride; Zirconia; Color; Mechanical properties; Microstructure
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