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The Influence of Microwave Sintering Process on the Adaptation of CAD/CAM Zirconia Core

±è±Ù¹è, À̱ٿì, ±èÁöȯ,
¼Ò¼Ó »ó¼¼Á¤º¸
±è±Ù¹è ( Kim Geun-Bae ) - ¿¬¼¼´ëÇб³
À̱ٿì ( Lee Keun-Woo ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
±èÁöȯ ( Kim Jee-Hwan ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº ÀüÅëÀûÀÎ ¼Ò°á ¹æ¹ý°ú ¸¶ÀÌÅ©·Î ¿þÀÌºê ¼Ò°á ¹æ¹ý¿¡ ÀÇÇØ Á¦ÀÛµÈ Áö¸£ÄÚ´Ï¾Æ ÄÚ¾ÆÀÇ ³»ºÎ ¹× º¯¿¬ ÀûÇÕµµ¸¦ ¾Ë¾Æº¸´Â °ÍÀÌ´Ù. º» ½ÇÇèÀº ±âÁ¸ÀÇ ¼Ò°á·Î¸¦ ÀÌ¿ëÇÏ´Â 3M¨ÞÀÇ Lava(LAV), Kavo¨Þ»çÀÇ Everest(EVE), Cerasys¨Þ CAD/CAM ½Ã½ºÅÛ(CER)°ú ¸¶ÀÌÅ©·Î¿þÀÌºê ¼Ò°á·Î¸¦ ÀÌ¿ëÇÏ´Â Dent. solution¨Þ»çÀÇ CAD/CAM ½Ã½ºÅÛ(DEN)¿¡¼­ ½Ã½ºÅÛº°·Î 12°³¾¿ÀÇ ÄھƸ¦ Á¦ÀÛÇÏ°í ½Ç¸®ÄÜ Á¢ÂøÁ¦¸¦ ÀÌ¿ëÇÏ¿© ±Ý¼Ó ´ÙÀÌ¿¡ ºÎÂø½ÃÄ×´Ù. Skyscan¨Þ 1076 ¹Ì¼¼ ´ÜÃþ ÃÔ¿µ±â¸¦ ÀÌ¿ëÇØ °¢°¢ÀÇ ½ÃÆíÀ» ÃÔ¿µÇÑ ÈÄ À籸¼ºÇÏ¿´´Ù. °¢ ½ÃÆí¿¡ ´ëÇØ B-L»ó, M-D»ó Àý´Ü¸é ¹× Ä¡¾Æ ÀåÃà¿¡ ´ëÇÑ È¾´Ü¸éÀ» ±¸Çس»°í °¢°¢ÀÇ ´Ü¸é¿¡ ´ëÇØ º¯¿¬ °£°Ý, Ãà¸é °£°Ý, ±³ÇÕ¸é °£°ÝÀ» ÃøÁ¤ÇÏ¿´´Ù. ½ÇÇè¿¡ ´ëÇÑ °á°ú´Â ´ÙÀ½°ú °°´Ù. 1. º¯¿¬ °£°ÝÀº EVE°¡ 36.20¥ìm·Î °¡Àå ÀÛ¾Ò°í, LAV´Â 47.67¥ìm, DEN´Â 52.47¥ìm, CERÀº 54.63¥ìm¸¦ ³ªÅ¸³»¾ú´Ù. 2. Ãà¸é °£°ÝÀº EVE°¡ 63.49¥ìm·Î °¡Àå Å« °ªÀ» ³ªÅ¸³»¾úÀ¸³ª ³×±º°£¿¡´Â À¯ÀÇÂ÷´Â ¾ø¾ú´Ù. 3. ±³ÇÕ¸é °£°ÝÀº DENÀÌ 77.06¥ìmÀ¸·Î °¡Àå ÀÛÀº °ªÀ» ³ªÅ¸³»¾úÀ¸¸ç, EVE¿Í CERÀº 100¥ìm¸¦ ³Ñ´Â °ªÀ¸·Î ´Ù¸¥ µÎ±º°ú À¯ÀÇÂ÷¸¦ º¸¿´´Ù. º» ¿¬±¸¿¡¼­ ¸¶ÀÌÅ©·Î¿þÀÌºê ¼Ò°áÀ» ÅëÇØ Á¦ÀÛµÈ CAD/CAM Áö¸£ÄÚ´Ï¾Æ Äھƴ ÀÓ»óÀûÀ¸·Î Çã¿ëÇÒ ¸¸ÇÑ º¯¿¬ °£°Ý ¹× Ãà¸é °£°Ý, ±³ÇÕ¸é °£°ÝÀ» º¸¿© ÁÖ¾ú´Ù.

The purpose of this research was to examine the fitness of zirconia cores that were made by different sintering methods; generic electricity furnace and microwave furnace. Firstly, 12 cores for each group were made by using each different sintering process and attached them to a metal die with silicon. The internal and marginal gap of sintered zirconia was measured by using Skyscan 1076 micro-CT, then it was reorganized by CT-An software. To each samples, we extracted B-L image, M-D image of cutting side, and cross-sectional side of tooth long axis and calculated the mean value of marginal, axial, and occlusal gap each side. Results: 1. The mean marginal gap of sintered zirconia was 36.20¥ìm for EVE, 47.67¥ìm for LAV, 52.47¥ìm for DEN, and 54.63¥ìm for CER. 2. For the axial wall, the research showed the largest value of 63.49um for EVE, but there were no statistical significance. 3. In related to the occlusal internal measurement, DEN showed the smallest value (77.06um), EVE and CER showed significantly high value. From this study, it is suggested that CAD/CAM zirconia core which was made in the process of microwave sintering has clinically acceptable values in marginal and internal gap.

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microwave sintering;CAD/CAM;zirconia;marginal and internal fit;micro-CT

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