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´Ù¾çÇÑ CAD/CAM ¹æ½ÄÀ¸·Î Á¦ÀÛÇÑ ±Ý¼ÓÇϺα¸Á¶¹° °£ÀÇ º¯¿¬ ¹× ³»¸é ÀûÇÕµµ ºñ±³ ¿¬±¸

Comparative evaluation of marginal and internal fit of metal copings fabricated by various CAD/CAM methods

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Á¤½ÂÁø, Á¶Çý¿ø, Á¤ÁöÇý, ±èÁ¤¹Ì, ±èÀ¯¸®,
¼Ò¼Ó »ó¼¼Á¤º¸
Á¤½ÂÁø ( Jeong Seung-Jin ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
Á¶Çý¿ø ( Cho Hye-Won ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
Á¤ÁöÇý ( Jung Ji-Hye ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
±èÁ¤¹Ì ( Kim Jeong-Mi ) - ¿ø±¤´ëÇб³ Ä¡°úº´¿ø Ä¡°ú±â°ø½Ç
±èÀ¯¸® ( Kim Yu-Lee ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç

Abstract

¸ñÀû: º» ¿¬±¸¿¡¼­´Â CAD/CAM ±â¼ú·Î Á¦ÀÛÇÑ 4°¡Áö ±Ý¼ÓÇϺα¸Á¶¹°ÀÇ º¯¿¬ ¹× ³»¸é ÀûÇÕµµ¸¦ ºñ±³ÇÏ¿© Á¤È®µµ ¹× ÀÓ»óÀû È¿¿ë¼ºÀ» ¾Ë¾Æº¸°íÀÚ ÇÑ´Ù.

Àç·á ¹× ¹æ¹ý: »ó¾Ç ÁßÀýÄ¡ ·¹Áø¸ðÇüÄ¡¾Æ¸¦ »èÁ¦ÇÑ µÚ º¹Á¦ÇÏ¿© Ni-Cr ÇÕ±Ý Ç¥ÁØ ¸ðÇüÀ» Á¦ÀÛÇÏ¿´´Ù. À̸¦ °øÃÊÁ¡ Çö¹Ì°æ¹æ½ÄÀÇ ±¸°­ ½ºÄ³³Ê¸¦ ÀÌ¿ëÇØ 12°³ÀÇ STL ÆÄÀÏÀ» ¾ò¾ú´Ù. CAD ÇÁ·Î±×·¥ »ó¿¡¼­ 50 ¥ìmÀÇ ½Ã¸àÆ® °ø°£À» ºÎ¿©ÇÑ µÎ²² 0.5 mmÀÇ ±Ý¼ÓÇϺα¸Á¶¹°À» µðÀÚÀÎÇÏ¿´´Ù. Co-Cr ±Ý¼ÓÇϺΠ±¸Á¶¹°Àº ´ÙÀ½ 4°¡Áö ¹æ¹ýÀ¸·Î Á¦ÀÛÇÏ¿´´Ù: Wax pattern milling & Casting (WM), Resin pattern 3D Printing & casting (RP), Milling & Sintering (MS), Selective laser melting (SLM). º¯¿¬ ¹× ³»¸é ÀûÇÕµµ¸¦ ÃøÁ¤Çϱâ À§ÇØ ½Ç¸®ÄÜ º¹Á¦¹ýÀ» ÀÌ¿ëÇÏ¿´´Ù. ÃøÁ¤ÇÑ °á°ú°ªÀº SPSS Åë°è ÇÁ·Î±×·¥À» ÀÌ¿ëÇÏ¿© ÀÏ¿ø¹èÄ¡ºÐ»êºÐ¼®(one-way ANOVA)À¸·Î Åë°èó¸®ÇÏ°í, »çÈÄ°ËÁ¤À¸·Î Scheffe test¸¦ ½ÃÇàÇÏ¿´À¸¸ç, 5% À¯ÀǼöÁØÀ¸·Î Æò°¡ÇÏ¿´´Ù(¥á = .05).

°á°ú: º¯¿¬ ÀûÇÕµµ´Â WM±º(27.66 ¡¾ 9.85 ¥ìm)°ú MS±º(28.88 ¡¾ 10.13 ¥ìm)ÀÌ RP±º(38.09 ¡¾ 11.14 ¥ìm)¿¡ ºñÇØ Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô ÀÛ¾Ò´Ù. Ä¡°æºÎ ÀûÇÕµµ´Â MS±ºÀÌ RP±º¿¡ ºñÇØ Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô ÀÛ¾Ò´Ù. Ãà¸é ÀûÇÕµµ´Â WM±º°ú MS±ºÀÌ RP±º°ú SLM±º º¸´Ù Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô ÀÛ¾Ò´Ù. Àý´Ü¸é ÀûÇÕµµ´Â RP±ºÀÌ Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô ÀÛ¾Ò´Ù.

°á·Ð: Wax pattern milling & Casting, Milling & Sintering¹ýÀ¸·Î Á¦ÀÛÇÑ Co-Cr copingÀÇ º¯¿¬°ú Ãà¸é¿¡¼­ÀÇ ÀûÇÕµµ°¡ ´õ ¿ì¼öÇÏ¿´´Ù. ¸ðµç ±ºÀÇ Co-Cr copingÀÇ º¯¿¬, Ä¡°æºÎ, Ãà¸é ÀûÇÕµµ´Â ÀÓ»óÀûÀ¸·Î Çã¿ëÇÒ¸¸ÇÑ ¹üÀ§ ¾È¿¡ ÀÖ¾ú´Ù.

Purpose: The purpose of the present study was to compare the accuracy of four different metal copings fabricated by CAD/CAM technology and to evaluate clinical effectiveness.

Materials and methods: Composite resin tooth of the maxillary central incisor was prepared for a metal ceramic crown and duplicated metal die was fabricated. Then scan the metal die for 12 times to obtain STL files using a confocal microscopy type oral scanner. Metal copings with a thickness of 0.5 mm and a cement space of 50 ¥ìm were designed on a CAD program. The Co-Cr metal copings were fabricated by the following four methods: Wax pattern milling & Casting (WM),
Resin pattern 3D Printing & casting (RP), Milling & Sintering (MS), Selective laser melting (SLM). Silicone replica technique was used to measure marginal and internal discrepancies. The data was statistically analyzed with One-way analysis of variance and appropriate post hoc test (Scheffe test) (¥á=.05).
Results: Mean marginal discrepancy was significantly smaller in the Group WM (27.66 ¡¾ 9.85 ¥ìm) and Group MS (28.88 ¡¾ 10.13 ¥ìm) than in the Group RP (38.09 ¡¾ 11.14 ¥ìm). Mean cervical discrepancy was significantly smaller in the Group MS than in the Group RP. Mean axial discrepancy was significantly smaller in the Group WM and Group MS then in the Group RP and Group SLM. Mean incisal discrepancies was significantly smaller in the Group RP than in all other groups.

Conclusion: The marginal and axial discrepancies of the Co-Cr coping fabricated by the Wax pattern milling and Milling/Sintering method were better than those of the other groups. The marginal, cervical and axial fit of Co-Cr copings in all groups are within a clinically acceptable range.

Å°¿öµå

ijµåÄ·; ±Ý°ü; º¯¿¬ÀûÇÕµµ; ³»¸éÀûÇÕµµ
CAD/CAM; Crowns; Dental marginal adaptation; Dental internal adaptations

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