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Bilayered all Ceramics¿¡¼­ Core¿Í Veneer °è¸éÀÇ Àü´Ü°áÇÕ°­µµ¿¡ °üÇÑ ¿¬±¸

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Á¤¿ë¼ö ( Jeong Yong-Soo ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ
µ¿Áø±Ù ( Dong Jin-Keun ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
ÀÌÁøÇÑ ( Lee Jin-Han ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
ÀÌÀçÀΠ( Lee Jae-In ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº ÀüºÎ µµÀç°ü ½Ã½ºÅÛ¿¡¼­ ÄÚ¾î-ºñ´Ï¾î °áÇÕ°è¸é¿¡¼­ÀÇ °áÇÕ °­µµ¸¦ Æò°¡Çϴµ¥ ÀÖ´Ù. º» ¿¬±¸¿¡¼­ »ç¿ëµÇ¾îÁø ÀüºÎ µµÀç°ü ½Ã½ºÅÛÀº IPS Empress2 with IPS Eris, IPS e.max Press with IPS e.max Ceram°ú IPS e.max ZirCAD with IPS e.max CeramÀÌ´Ù. Á¦Á¶»çÀÇ Áö½Ã¿¡ µû¶ó ÄÚ¾î(N=36, N=12/system, Á÷°æ: 10mm, µÎ²²: 3mm)¸¦ Á¦ÀÛÇÏ¿´°í ÃÊÀ½ÆÄ ¼¼Ã´À» ½ÃÇàÇÏ¿´´Ù. Ưº°È÷ Á¦ÀÛµÈ ½ºÅ×Àθ®½º ½ºÆ¿ ¸ôµå¸¦ ÀÌ¿ëÇÏ¿© ÄÚ¾î »óºÎ¿¡ ºñ´Ï¾î(Á÷°æ: 3mm, µÎ²²: 2mm)¸¦ Ã༺ÇÑ ÈÄ ¼Ò¼ºÇÏ¿´´Ù. ¼Ò¼º ÈÄ, ÃÊÀ½ÆÄ ¼¼Ã´À» ½ÃÇàÇÏ°í ¾ÆÅ©¸±¸¯ ·¹Áø¿¡ ¸Å¸ôÇÏ¿´´Ù. Á¦ÀÛµÈ ½ÃÆíÀº 37¡ÉÀÇ Áõ·ù¼ö¿¡ 1ÁÖÀÏ°£ º¸°üÇÏ¿´´Ù. ¸¸´É½ÃÇè±â(Z020, Zwick, Germany)·Î ½ÃÆíÀÇ Àü´Ü°áÇÕ°­µµ¸¦ ÃøÁ¤ÇÏ¿´°í, ÇÏÁßÀÌ ÄÚ¾î-ºñ´Ï¾î °è¸é¿¡ °¡´ÉÇÑ °¡±õ°Ô °¡ÇØÁöµµ·Ï ½ÃÆíÀ» À§Ä¡½ÃÅ°°í, ÆÄÀýÀÌ ÀϾ ¶§±îÁö 1.00mm/minÀÇ crosshead speed·Î ÇÏÁßÀ» °¡ÇÏ¿´´Ù. ÃøÁ¤µÈ °¢ ±ºÀÇ Æò±ÕÀü´Ü°áÇÕ°­µµ(MPa¡¾SD)¿¡ ´ëÇÑ Åë°èÀû À¯ÀǼºÀ» °ËÁõÇϱâ À§ÇØ ÀÏ¿ø ºÐ»êºÐ¼®À» ½ÃÇàÇÏ¿´À¸¸ç, »çÈÄ°ËÁ¤Àº Tukey test¸¦ ÀÌ¿ëÇÏ¿´´Ù(p=0.05). ¶ÇÇÑ ÆÄÀýµÈ ½ÃÆíÀ» ÁÖ»çÀüÀÚÇö¹Ì°æ(JSM-6360,JEOL, Japan)À¸·Î ÆÄÀý¾ç»óÀ» °üÂûÇÏ¿´´Ù. ÆÄÀý¾ç»óÀº ÄÚ¾î ³»¿¡¼­ÀÇ ÀÀÁý¼º ÆÄÀý, ºñ´Ï¾î ³»¿¡¼­ÀÇ ÀÀÁý¼º ÆÄÀý, È¥ÇÕÇü ÆÄÀý ȤÀº Á¢Âø¼º ÆÄÀý·Î ºÐ·ùÇÏ¿´´Ù. ÄÚ¾î¿Í ºñ´Ï¾î °è¸é¿¡¼­ÀÇ Æò±ÕÀü´Ü°áÇÕ°­µµ(MPa¡¾SD)´Â IPS-e.max Press°¡ 32.85¡¾6.75 MPa, IPS Empress 2°¡ 29.30¡¾6.51 MPa, IPS e.max ZirCAD°¡ 28.10¡¾4.28 MPa·Î ³ªÅ¸³µ´Ù. Åë°èÀû ºÐ¼® °á°ú °¢ ½Ã½ºÅÛ °£¿¡¼­ À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù(P>0.05). ¾î¶°ÇÑ ½Ã½ºÅÛ¿¡¼­µµ Á¢Âø¼º ÆÄÀýÀº °üÂûµÇÁö ¾Ê¾Ò´Ù. IPS Empress 2¿Í IPS e.max Press¿¡¼­´Â ÄÚ¾î¿Í ºñ´Ï¾î ³»¿¡¼­ÀÇ ÀÀÁý¼º ÆÄÀýÀÌ °üÂûµÇ¾úÀ¸¸ç, IPS e.max ZirCAD¿¡¼­´Â È¥ÇÕÇü ÆÄÀý°ú ºñ´Ï¾î ³»¿¡¼­ÀÇ ÀÀÁý¼º ÆÄÀýÀÌ °üÂûµÇ¾ú´Ù.

Purpose: The purpose of this study was to investigate the bond strength of the core-veneer interface in all ceramic systems.

Material and Methods: The all ceramic systems tested with their respective veneer were IPS Empress 2 with IPS Eris, IPS e.max Press with IPS e.max Ceram and IPS-e.max ZirCAD with IPS e.max Ceram. Cores (N=36, N=12/group, diameter: 10mm, thickness: 3mm) were fabricated according to the manufacturer¡¯s instruction and cleaned with ultrasonic cleaner. The veneer(diameter: 3mm, thickness: 2mm) were condensed in stainless steel mold and fired on to the core materials. After firing, they were again ultrasonically cleaned and embedded in acrylic resin. The specimens were stored in distilled water at 37¡É for 1 week. The specimens were placed in a mounting jig and subjected to shear force in a universal testing machine(Z020, Zwick, Germany). Load was applied at close to the core-veneer interface as possible with crosshead speed of 1.00mm/min until failure. Average shear bond strengths(MPa) were analyzed with a one-way analysis of variance and the Tukey test(¥á=.05). The failed specimens were examinated by scanning electron microscopy(JSM-6360, JEOL, Japan). The pattern of failure was classified as cohesive in core, cohesive in veneer, mixed or adhesive.

Results: The mean shear bond strength(MPa¡¾SD) were IPS e.max Press 32.85¡¾6.75 MPa, IPS Empress 2 29.30¡¾6.51 MPa, IPS e.max ZirCAD 28.10¡¾4.28 MPa. IPS Empress 2, IPS e.max Press, IPS e.max ZirCAD were not significantly different from each others. Scanning electron microscopy examination revealed that adhesive failure did not occur in any all ceramic systems. IPS Empress 2 and IPS e.max Press exhibited cohesive failure in both the core and the veneer. IPS e.max ZirCAD exhibited cohesive failure in veneer and mixed failure.

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Bilayerd all ceramics;core-veneer interface;shear bond strength

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