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ÀüºÎ µµÀç°üÀÇ º¯¿¬ ¹× ³»¸é °£±Ø¿¡ ´ëÇÑ micro CT¿Í Àý´Ü ½ÃÆí ÃøÁ¤¹ýÀÇ ºñ±³

Comparison of micro CT and cross-section technique for evaluation of marginal and internal fit of lithium disilicate crowns

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°íÀμ®, ±èÁ¤¹Ì, Á¶Çý¿ø,
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°íÀμ® ( Ko In-Seok ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
±èÁ¤¹Ì ( Kim Jeong-Mi ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇк´¿ø Áß¾Ó±â°ø½Ç
Á¶Çý¿ø ( Cho Hye-Won ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç

Abstract

¸ñÀû:º» ¿¬±¸´Â ¼öº¹¹°ÀÇ ÀûÇÕµµ¸¦ °èÃøÇÏ´Â µÎ °¡Áö ÃøÁ¤¹æ¹ýÀ» Æò°¡Çϱâ À§ÇØ CAD-CAM (computer aided design-computer aided manufacturing)°ú ¿­°¡¾Ð ¼Ò¼º¹ýÀ¸·Î ÀüºÎ µµÀç°üÀ» Á¦ÀÛÇÏ°í micro CT¿Í cross-section techniqueÀ¸·Î ÀüºÎ µµÀç°üÀÇ ÀûÇÕµµ¸¦ ºñ±³ÇÏ°íÀÚ ÇÏ¿´´Ù.

Àç·á ¹× ¹æ¹ý:ÇÏ¾Ç Á¦ 1´ë±¸Ä¡ ·¹Áø Ä¡¾Æ¸¦ ÀüºÎ µµÀç°üÀ» À§ÇÑ Áö´ëÄ¡¸¦ Çü¼ºÇÏ°í PMMA (polymethylmethacrylate) ·¹Áø ºí·ÏÀ» °¡°øÇÏ¿© 10°³ÀÇ ½ÃÆíÀ» º¹Á¦ÇÏ¿´´Ù. º¹Á¦ÇÑ ·¹Áø ´ÙÀÌÀÇ ÀλóÀ» äµæÇÏ°í ¸ðÇüÀ» Á¦ÀÛÇÏ¿© 5°³´Â ¿­°¡¾Ð ¼Ò¼º¹ýÀ¸·Î IPS e.max Press (Ivoclar Vivadent, Schaan, Liechtenstein) µµÀç°üÀ» Á¦ÀÛÇÏ¿´´Ù. ´Ù¸¥ 5°³ÀÇ ½ÃÆíÀº CAD-CAM °¡°ø¹ý(Ceramil motion 2, Amann Girrbach, Koblach, Austria)À» ÀÌ¿ëÇÏ¿© IPS e.max CAD µµÀç°üÀ» Á¦ÀÛÇÏ¿´´Ù. °¢ ·¹Áø ´ÙÀÌ¿¡ ÀüºÎ µµÀç°üÀ» Àλê¾Æ¿¬ ½Ã¸àÆ®(Fleck¡¯s zinc cement, Keystone industries, Gibbstown, NJ, USA)·Î ¼Õ°¡¶ô ¾Ð·Â¿¡ ÀÇÇØ ÇÕÂøÇÏ¿´´Ù. º¯¿¬ ¹× ³»¸é ÀûÇÕµµ¸¦ ÃøÁ¤Çϱâ À§Çؼ­ ÇÕÂøµÈ ½ÃÆí 10°³¸¦ ¸ÕÀú micro CT·Î ÃÔ¿µÇÏ¿© Çù-¼³ ½Ã»ó¸éÀÇ ¿µ»óÁ¤º¸¸¦ ȹµæÇÏ¿´´Ù. ±× ÈÄ Àý´Ü ½ÃÆíÀ» ¸¸µé¾î ÁÖ»çÀüÀÚÇö¹Ì°æÀ¸·Î micro CT¿Í µ¿ÀÏÇÑ ÁöÁ¡ÀÇ °£±ØÀ» ÃøÁ¤ÇÏ¿´´Ù. SPSS 22.0 ÇÁ·Î±×·¥À» ÀÌ¿ëÇÏ¿© °¢ ÃøÁ¤ ÁöÁ¡¿¡¼­ Á¦ÀÛ ¹æ½Äº°, ÃøÁ¤ ¹æ½Äº°·Î Mann-Whitney °ËÁ¤ ¹æ¹ýÀ» ÅëÇØ À¯ÀÇÂ÷ °ËÁõÀ» ½ÃÇàÇÏ¿´´Ù.

°á°ú: Micro CT¿Í ÁÖ»çÀüÀÚÇö¹Ì°æÀ¸·Î ÃøÁ¤ÇÑ º¯¿¬ ¹× ³»¸é ÀûÇÕµµ´Â À¯»çÇÏ¿´À¸¸ç, Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù. µÎ °¡Áö Á¦ÀÛ¹ýÀÇ µµÀç°üÀº º¯¿¬ ¹× ³»¸é ÀûÇÕµµ¿¡ À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù.

°á·Ð:CAD-CAM°ú ¿­°¡¾Ð¼Ò¼ºÀ¸·Î Á¦ÀÛÇÑ ÀüºÎ µµÀç°üÀº ÀûÇÕµµ¿¡ Â÷À̸¦ º¸ÀÌ°í ÀÖÁö ¾ÊÀ¸¸ç, Micro CT¿Í ÁÖ»çÀüÀÚÇö¹Ì°æÀ» ÀÌ¿ëÇÑ ÃøÁ¤ ¹æ½Ä ¸ðµÎ ÀÓ»óÀûÀ¸·Î ÀÌ¿ë °¡´ÉÇÒ °ÍÀ¸·Î »ç·áµÈ´Ù.

PURPOSE. The purpose of this study was to evaluate the adaptation of lithium disilicate crowns fabricated by CAD-CAM (computer aided design-computer aided manufacturing) and heat-press technique to compare two different measurement methods in assessing fit of the ceramic crowns: micro CT and cross-section technique.

MATERIALS AND METHODS. A prepared typodont mandibular molar for ceramic crown was duplicated and ten dies were produced by milling the PMMA (polymethylmethacrylate) resin. Ten vinyl polysiloxane impressions were made and stone casts were produced. Five dies were used for IPS e.max Press crowns with heat-press technique. The other five dies were used for IPS e.max CAD crowns with CAD-CAM technique. Ten lithium disilicate crowns were cemented on the resin dies using zinc phosphate cement with finger pressure. The marginal and internal fits in central buccolingual plane were evaluated using a micro CT. Then the specimens were embedded and cross-sectioned and the marginal and internal fits were measured using scanning electronic microscope. The two measurement methods and two manufacturing methods were compared using Mann-Whitney U test (SPSS 22.0).

RESULTS. The marginal and internal fit values using micro CT and cross-section technique were similar, showing no significant differences. There were no significant differences in adaptation between lithium disilicate crowns fabricated with CAD-CAM and heat-press technique.

CONCLUSION. Both micro CT and cross-section technique were acceptable methods in the evaluation of marginal and internal fit of lithium disilicate crown. There was no difference in adaptation between lithium disilicate crowns fabricated with CAD-CAM and heat-press technique except occlusal fit.

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Micro CT; º¯¿¬ °£±Ø; ³»¸é °£±Ø; ijµåÄ·
Micro CT; Marginal fit; Internal fit; Computer aided design-computer aided manufacturing (CAD-CAM)

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