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¼öÁ¾ÀÇCAD/CAM ½Ã½ºÅÛÀ¸·Î Á¦ÀÛÇÑ Áö¸£ÄÚ´Ï¾Æ ±â¹Ý ¿ÏÀüµµÀç°üÀÇ ÀûÇÕµµ ºñ±³

A comparison of the fidelity of various zirconia-based all-ceramic crowns fabricated with CAD/CAM systems

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±è¼ºÁØ, Á¶±¤Çå, À̱Ժ¹,
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±è¼ºÁØ ( Kim Sung-Jun ) - °æºÏ´ëÇб³ Ä¡°ú´ëÇÐ º¸Ã¶Çб³½Ç
Á¶±¤Çå ( Jo Kwang-Hun ) - °æºÏ´ëÇб³ Ä¡°ú´ëÇÐ º¸Ã¶Çб³½Ç
À̱Ժ¹ ( Lee Kyu-Bok ) - °æºÏ´ëÇб³ Ä¡°ú´ëÇÐ º¸Ã¶Çб³½Ç

Abstract

¿¬±¸¸ñÀû: ÃÖ±Ù¿¡´Â ±Ý¼ÓµµÀç°üÀÇ ½É¹ÌÀû ¹®Á¦·Î ½É¹Ì¼º°ú °­µµ°¡ °³¼±µÈ ÄÚ¾Æ¿ë µµÀç ¹× Áö¸£ÄڴϾƸ¦ ÀÌ¿ëÇÑ ÀüºÎµµÀç°ü ½Ã½ºÅÛ¿¡ °ü½ÉÀÌ Áõ°¡µÇ°í ÀÖ´Ù. ƯÈ÷ ±Ý¼Ó°ú À¯»çÇÑ °­µµ¸¦ °¡Áö¸é¼­ ±Ý¼ÓÀÇ ºñ½É¹Ì¼ºÀ» ±Øº¹ÇÒ ¼ö ÀÖ´Â Áö¸£ÄڴϾƸ¦ ÀÌ¿ëÇÑ º¸Ã¶¹°ÀÇ Á¦ÀÛÀÌ ±¹³»¿Ü¿¡¼­ ¸¹ÀÌ ÀÌ·ïÁö°í ÀÖ´Ù. ÇÏÁö¸¸ CAD/CAM ½Ã½ºÅÛÀ¸·Î Á¦À۵Ǵ ¿©·¯ Á¾·ùÀÇ Áö¸£ÄڴϾƸ¦ ÀÌ¿ëÇÑ ÀüºÎµµÀç°üÀÇ ÀûÇÕµµ¿¡ ´ëÇÑ ÀÓ»ó ¿¬±¸´Â ºÎÁ·ÇÑ ½ÇÁ¤ÀÌ´Ù. ´Ù¾çÇÑ CAD/CAM ½Ã½ºÅÛ Áß Procera, Cerec inLab, Lava¿¡ ÀÇÇØ Á¦ÀÛµÈ Áö¸£ÄڴϾƸ¦ ÀÌ¿ëÇÑ ÀüºÎµµÀç°üÀÇ º¯¿¬ ÀûÇÕµµ¿Í ³»¸é ÀûÇÕµµ¸¦ ÃøÁ¤ÇÏ¿© À̸¦ ÀüÅëÀûÀÎ ¹æ½ÄÀ¸·Î ÁÖÁ¶µÈ ±Ý¼ÓµµÀç°üÀÇ ÀûÇÕµµ¿Í ºñ±³ Æò°¡ÇØ º½À¸·Î½á ÀÓ»ó Àû¿ë¿¡ Âü°í ÀÚ·á·Î È°¿ëÇÏ°íÀÚ ÇÑ´Ù.

¿¬±¸Àç·á ¹× ¹æ¹ý: º» ¿¬±¸¸¦ À§ÇØ ÇÏ¾Ç ¿ìÃø Á¦2¼Ò±¸Ä¡¿¡ ÇØ´çÇÏ´Â ·¹ÁøÄ¡¸¦ »èÁ¦ÇÏ¿© Àλóäµæ ÈÄ, ±Ý¼Ó ÁÖ¸ðÇüÀ» Á¦ÀÛÇÏ¿´´Ù. ±Ý¼Ó ÁÖ¸ðÇüÀÇ 40°³ÀÇ ÀλóÀ» äµæ ÈÄ °¢ ½Ã½ºÅÛ¸¶´Ù 10°³¾¿ ÃÑ 40°³ÀÇ crownÀ» Á¦ÀÛÇÏ¿´´Ù. ±Ý¼ÓµµÀç°üÀº ÀüÅëÀûÀÎ ¹æ½ÄÀ¸·Î Á¦ÀÛÇÏ¿´°í Procera, Lava, Cerec inLab crownÀº zirconia core¸¦ ÀÌ¿ëÇÏ¿© CAD/CAM ½Ã½ºÅÛÀ¸·Î Á¦ÀÛÇÏ¿´´Ù. ¼öÁ÷ º¯¿¬ ¿ÀÂ÷¿Í ³»¸é °£°ÝÀ» °¢ ±×·ì¸¶´Ù ±Ý¼Ó ÁÖ¸ðÇü¿¡ ½Ã¸àÆ® Á¢Âø ¾øÀÌ ÃøÁ¤ÇÏ¿´´Ù. ±× °á°ú´Â oneway ANOVA¿Í Tukey¡¯s HSD test·Î Åë°è ³»¾ú´Ù.

°á °ú: ¼öÁ÷ º¯¿¬ ¿ÀÂ÷´Â ±Ý¼ÓµµÀç°üÀÌ 50.6 ¡¾ 13.9 ¥ìm, Procera crownÀÌ 62.3 ¡¾ 15.7 ¥ìm, Lava crownÀÌ 45.3 ¡¾ 7.9 ¥ìm, Cerec inLab crownÀº 71.2 ¡¾ 2.0 ¥ìm·Î ÃøÁ¤µÇ¾ú´Ù. ³»¸é °£°ÝÀº ±Ý¼ÓµµÀç°üÀÌ 52.6 ¡¾10.1 ¥ìm, Procera crownÀÌ161.7 ¡¾18.5 ¥ìm, Lava crownÀÌ63.0 ¡¾10.2 ¥ìm, Cerec inLab crownÀÌ73.7 ¡¾10.7 ¥ìm·Î ÃøÁ¤µÇ¾ú´Ù. º¯¿¬ ÀûÇÕµµ Ãø¸é¿¡¼­ º¼ ¶§ Procera crown, Lava crown, Cerec inLab ±×¸®°í ÀüÅëÀûÀÎ ±Ý¼ÓµµÀç°üÀº ÀÓ»óÀûÀ¸·Î ¹Þ¾ÆµéÀÏ ¼ö ÀÖ´Â ÀûÇÕµµ ¹üÀ§(120 §­) ³»¿¡ ÀÖ¾ú´Ù. ³»¸é ÀûÇÕµµ Ãø¸é¿¡¼­ º¼ ¶§ Procera crownÀ» Á¦¿ÜÇÑ Lava crown, Cerec inLab, ±Ý¼ÓµµÀç°üÀº ÀÓ»óÀûÀ¸·Î ¹Þ¾ÆµéÀÏ ¼ö ÀÖ´Â ÀûÇÕµµ ¹üÀ§(140 §­) ³»¿¡ ÀÖ¾ú´Ù.

Statement of Problem: The interest in all-ceramic restorations has increased as more techniques have become available. With the introduction of machinable dental ceramics and CAD/CAM systems there is a need to evaluate the quality levels of these new fabrication techniques.

Purpose: This study is to evaluate the crown fidelity (absolute marginal discrepancy and internal gap) of various zirconia-based all-ceramic crowns fabricated with different CAD/CAM (computer-assisted design/computer-assisted manufacturing) systems and conventional cast metal-ceramic crowns.

Material and Methods: A resin tooth of lower right second premolar was prepared. After an impression was taken, one metal master die was made. Then 40 impressions of metal master dies were taken for working dies. 10 crowns per each system were fabricated using 40 working dies. Metalceramic crowns were cast by using the conventional method, and Procera, Lava, and Cerec inLab crowns were fabricated with their own CAD/CAM manufactruing procedures.
The vertical marginal discrepancies and internal gaps of each crown groups were measured on a metal master die without a luting agent. The results were statistically analyzed using the one-way ANOVA and Tukey¡¯s HSD test.

Results: 1. Vertical marginal discrepancies were 50.6 ¡¾ 13.9 §­ for metal-ceramic crowns, 62.3 ¡¾ 15.7 §­ for Procera crowns, 45.3 ¡¾ 7.9 §­ for Lava crowns, and 71.2 ¡¾ 2.0 §­ for Cerec inLab crowns. 2. The Internal gaps were 52.6 ¡¾ 10.1 §­ for metal-ceramic crowns, 161.7 ¡¾ 18.5 §­ for Procera crowns, 63.0 ¡¾ 10.2 §­ for Lava crowns, and 73.7 ¡¾ 10.7 §­ for Cerec inLab crowns.

Conclusion: 1. The vertical marginal discrepancies of, 4 crown groups were all within the clinically acceptable range (120 §­). 2. The internal gaps of LAVA, Cerec inlab, and metal-ceramic crowns were within clinically acceptable range except Procera crown (140 §­).

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CAD/CAM ½Ã½ºÅÛ;Áö¸£ÄڴϾÆ;º¯¿¬ÀûÇÕµµ;³»¸éÀûÇÕµµ
CAD/CAM system;zirconia;internal gap;vertical marginal discrepancy

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