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CAD-CAMÀ» ÀÌ¿ëÇÑ 3D printing, milling, casting ¹æ¹ýÀÇ ºñ±Í±Ý¼Ó ÄÚÇÎÀÇ Áö´ëÄ¡ º¯¿¬ ÀûÇÕµµ ¿¬±¸

Influence of finish line design on the marginal fit of nonprecious metal alloy coping fabricated by 3D printing, milling and casting using CAD-CAM

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±è¼­¶û ( Kim Seo-Rahng ) - Seoul National University School of Dentistry Department of Prosthodontics
±è¸íÁÖ ( Kim Myung-Joo ) - Seoul National University School of Dentistry Department of Prosthodontics
¹ÚÁö¸¸ ( Park Ji-Man ) - Seoul National University School of Dentistry Department of Prosthodontics
±è¼º±Õ ( Kim Seong-Kyun ) - Seoul National University School of Dentistry Department of Prosthodontics
Ç㼺ÁÖ ( Heo Seong-Joo ) - Seoul National University School of Dentistry Department of Prosthodontics
°ûÀ翵 ( Koak Jai-Young ) - Seoul National University School of Dentistry Department of Prosthodontics

Abstract

¸ñÀû: º» ¿¬±¸ÀÇ ¸ñÀûÀº ·¹ÀÌÁ® ½ÅÅ͸µ, ÄÄÇ»ÅÍ ¹Ð¸µ, ÁÖÁ¶ÀÇ ¼¼ °¡Áö ¹æ¹ýÀ¸·Î Á¦ÀÛµÈ ºñ±Í±Ý¼Ó ÇÕ±Ý ÄÚÇÎÀÇ º¯¿¬ ÇüÅ¿¡ µû¸¥ º¯¿¬ ÀûÇÕµµÀÇ º¯È­¸¦ °üÂûÇÏ´Â µ¥ ÀÖ´Ù.

Àç·á ¹× ¹æ¹ý: ¼­·Î ´Ù¸¥ µÎ °³ÀÇ º¯¿¬ ÇüŸ¦ Á¤È®È÷ ÀçÇöÇϱâ À§ÇØ 3D Computer-aided DesignÀ» ÀÌ¿ëÇÏ¿© Áö´ëÄ¡ »èÁ¦ÀÇ ¿øÄ¢¿¡ µû¶ó Áö´ëÄ¡¸¦ µðÀÚÀÎÇÑ ´ÙÀ½, ƼŸ´½ ºí·°À» ÄÄÇ»ÅÍ ¹Ð¸µÇÏ¿© ÁÖ¸ðµ¨À» Á¦ÀÛÇÏ¿´´Ù. °¢°¢ÀÇ ¸ðµ¨¿¡ ´ëÇÏ¿© À§ÀÇ 3 °¡Áö Á¦ÀÛ ¹æ½ÄÀ¸·Î ºñ±Í±Ý¼Ó ÇÕ±Ý ÄÚÇÎÀ» 12°³¾¿ Á¦ÀÛÇÏ¿©, ÃÑ 72°³ÀÇ ÄÚÇÎÀ» Á¦ÀÛÇÏ¿´´Ù. °¢ ÄÚÇÎÀº Áö´ëÄ¡¿¡ ÀûÇÕ½ÃÄѼ­ °øÃÊÁ¡ ·¹ÀÌÀú ÁÖ»ç Çö¹Ì°æÀ¸·Î ±Ù½É, ÇùÃø, ¿ø½É, ¼³Ãø º¯¿¬ÀÇ º¯¿¬ ÀûÇÕµµ¸¦ 150¹èÀ²·Î ÃøÁ¤ÇÏ¿´´Ù.

°á°ú: ·¹ÀÌÁ® ½ÅÅ͸µÀ¸·Î Á¦ÀÛÇÑ ÄÚÇÎÀÇ Æò±Õ º¯¿¬ ¿ÀÂ÷´Â deep chamfer margin¿¡¼­ 11.8 ¡¾ 7.4 ¥ìm, rounded shoulder margin¿¡¼­ 6.3 ¡¾ 3.5 ¥ìm ¿´°í, ±× Â÷ÀÌ´Â Åë°èÀûÀ¸·Î À¯ÀÇÇß´Ù (P < .0001). ÄÄÇ»ÅÍ ¹Ð¸µÀ¸·Î Á¦ÀÛÇÑ ±×·ì¿¡¼­´Â deep chamfer margin¿¡¼­ 53.9 ¡¾ 27.8 ¥ìm, rounded shoulder margin¿¡¼­ 48.6 ¡¾ 30.0 ¥ìm¿´°í, º¯¿¬ ÇüÅ¿¡ µû¸¥ À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù (P = .279). ÁÖÁ¶ ¹æ¹ýÀ¸·Î Á¦ÀÛÇÑ ±×·ìÀº deep chamfer margin¿¡¼­ 18.8 ¡¾ 20.2 ¥ìm, rounded shoulder margin¿¡¼­ 30 ¡¾ 20.5 ¥ìm ¿´°í, ±× Â÷ÀÌ´Â Åë°èÀûÀ¸·Î À¯ÀÇÇß´Ù (P = .0004).

°á·Ð: À̹ø ½ÇÇèÀ» ÅëÇÏ¿©, ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù. 1. º¯¿¬ÀÇ ÇüÅ¿¡ µû¸¥ º¯¿¬ ÀûÇÕµµ´Â ·¹ÀÌÁ® ½ÅÅ͸µÀ̳ª ÁÖÁ¶ ¹æ¹ýÀ¸·Î Á¦ÀÛµÈ ±Ý¼Ó ÄÚÇÎÀÇ °æ¿ì º¯¿¬ ÇüÅ¿¡ µû¶ó À¯ÀÇÇÑ Â÷ÀÌ°¡ ÀÖ¾ú´Ù. 2. ·¹ÀÌÁ® ½ÅÅ͸µÀ¸·Î Á¦ÀÛÇÑ ±Ý¼Ó ÄÚÇο¡¼­ rounded shoulder marginÀÌ deep chamfer marginº¸´Ù ¿ì¼öÇÑ º¯¿¬ ÀûÇÕµµ¸¦ º¸¿´´Ù. 3. ÁÖÁ¶ ¹æ¹ýÀ¸·Î Á¦ÀÛÇÑ ±Ý¼Ó ÄÚÇÎÀÇ °æ¿ì´Â deep chamfer marginÀÌ rounded shoulder marginº¸´Ù ¿ì¼öÇÑ º¯¿¬ ÀûÇÕµµ¸¦ º¸¿´´Ù. 4. Á¦ÀÛ ¹æ½Ä¿¡ µû¸¥ ÄÚÇÎÀÇ º¯¿¬ ÀûÇÕµµ´Â ·¹ÀÌÁ® ½ÅÅ͸µÀÌ °¡Àå ¾çÈ£ÇÏ¿´°í, ±× ´ÙÀ½ ÁÖÁ¶ ¹æ¹ý°ú ¹Ð¸µ ¹æ¹ý ¼øÀ¸·Î º¯¿¬ ÀûÇÕµµ ¾çÈ£ÇÏ¿´´Ù. À̹ø ¿¬±¸¸¦ ÅëÇØ, Áö´ëÄ¡ÀÇ º¯¿¬ ÇüÅ¿¡ µû¸¥ ±Ý¼Ó ÄÚÇÎÀÇ º¯¿¬ ÀûÇÕµµÀÇ º¯È­¸¦ °üÂûÇÏ¿´À¸¸ç, ·¹ÀÌÁ® ½ÅÅ͸µÀ¸·Î Á¦ÀÛÇϰųª µðÁöÅÐ ¹Ð¸µÇÑ ¿Î½º ÆÐÅÏÀ» ij½ºÆÃÇÑ °æ¿ì¿¡´Â »ó°ü °ü°è°¡ ÀÖÀ½À» È®ÀÎÇÏ¿´´Ù. ÀÓ»ó¿¡ Àû¿ëÇÔ¿¡ ÀÖ¾î Áö´ëÄ¡ÀÇ º¯¿¬ ÇüŸ¦ °í·ÁÇÏ¿© Á¦ÀÛ ¹æ½ÄÀ» °áÁ¤ÇÏ´Â °ÍÀÌ ÃßõµÈ´Ù.

Purpose. The purpose of this study was to examine the correlation between the finish line designs and the marginal adaptation of nonprecious metal alloy coping produced by different digital manufacturing methods.

Materials and methods. Nonprecious metal alloy copings were made respectively from each master model with three different methods; SLS, milling and casting by computer aided design and computer aided manufacturing (CAD-CAM). Twelve copings were made by each method resulting in 72 copings in total. The measurement was conducted at 40 determined reference points along the circumferential margin with the confocal laser scanning microscope at magnification ¡¿150.

Results. Mean values of marginal gap of laser sintered copings were 11.8 ¡¾ 7.4 ¥ìm for deep chamfer margin and 6.3 ¡¾ 3.5 ¥ìm for rounded shoulder margin and the difference between them was statistically significant (P < .0001). Mean values of marginal gap of casted copings were 18.8 ¡¾ 20.2 ¥ìm for deep chamfer margin and 33 ¡¾ 20.5 ¥ìm for rounded shoulder margin and the difference between them was significant (P = .0004).

Conclusion. Within the limitation of this study, the following conclusions were drawn. 1. The variation of finish line design influences the marginal adaptation of laser sintered metal coping and casted metal coping. 2. Laser sintered copings with rounded shoulder margin had better marginal fit than deep chamfer margin. 3. Casted copings with deep chamfer margin had better marginal fit than rounded shoulder margin. 4. According to the manufacturing method, SLS system showed the best marginal fit among three different methods. Casting and milling method followed that in order.

Å°¿öµå

CAD-CAM; 3D printing; ·¹ÀÌÁ® ½ÅÅ͸µ; ºñ±Í±Ý¼Ó ÇÕ±Ý ÄÚÇÎ; º¯¿¬ÀûÇÕ
CAD-CAM; 3D printing; Selective laser sintering; Nonprecious alloy coping; Marginal fit

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