Àá½Ã¸¸ ±â´Ù·Á ÁÖ¼¼¿ä. ·ÎµùÁßÀÔ´Ï´Ù.

Á¤ÇÏÁß Á¶°Ç¿¡¼­ Ä¡°ú¿ë ¼¼¶ó¹ÍÀÇ ±Õ¿­ÀüÆÄ ¾ç»ó Æò°¡

Evaluation of Crack Propagation Aspects of Dental Ceramic Materials under Static Loading Conditions

´ëÇÑÄ¡°ú±âÀçÇÐȸÁö 1999³â 26±Ç 1È£ p.75 ~ 82
°­µ¿Áø, ¹èżº, ¹ÚÁÖ¹Ì,
¼Ò¼Ó »ó¼¼Á¤º¸
°­µ¿Áø (  ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úÀç·áÇб³½Ç
¹èżº (  ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úÀç·áÇб³½Ç
¹ÚÁֹ̠(  ) - ÀüºÏ´ëÇб³ Ä¡°úº¸Ã¶Çб³½Ç ¹×

Abstract

°á·Ð
º» ¿¬±¸¿¡¼­´Â ÀÀ·ÂºÎ½ÄÀÌ ¼¼¶ó¹Í Àç·áÀÇ Æı«¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Æò°¡Çϱâ À§ÇØ VMK68,
IPS-Empress ¹× In-CeramÀ» »ç¿ëÇÏ¿© ±ÁÈû½ÃÆíÀ» Á¦ÀÛÇÏ°í, ½ÃÆíÀÇ ÀÎÀå¸é Áß¾Ó¿¡ ºñÄ¿½º
¾ÐÀÚÀÇ ¾ÐÀÔ¿¡ ÀÇÇØ Æı«¸¦ Áö¹èÇÏ´Â ¿¹¸®ÇÑ ±Õ¿­À» Çü¼ºÇÑ ´ÙÀ½, 37¡£CÀÇ Áõ·ù¼ö Áß¿¡¼­
crosshead ¼Óµµ 0.5§®/min°ú Á¤ÀûÀ¸·Î ÇÏÁßÀ» °¡ÇÏ¿´À» ¶§ÀÇ ±Õ¿­ÁøÀü ¾ç»óÀ» Á¶»çÇÏ¿´À¸
¸ç, ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. Á¤ÇÏÁß Á¶°Ç¿¡¼­ÀÇ ±Õ¿­ÁøÀü ¾ç»óÀº ºñÄ¿½º ¾ÏÀÚÀÇ ¾ÐÀÔÀ¸·Î ÀÎÇØ »ý¼ºµÈ ±Õ¿­Áø¿øÁö
¿¡ ¹Ý¿øÇüÀÇ ±Õ¿­ÀÌ »ý¼ºµÈ ÈÄ º¸´Ù ºü¸£°Ô °¡¼ÓµÇ´Â ¾ç»óÀ» º¸¿´´Ù.
2. VMK68°ú IPS-EmpressÀÇ Æĸ鿡¼­´Â ±Õ¿­ÀÌ º®°³¸éÀ» µû¶ó¼­ ºü¸£°Ô ¼ºÀåÇÏ¿© Æı«
°¡ ÀϾ ¾ç»óÀ» º¸¿´´Ù.
3. In-CeramÀÇ Æĸ鿡¼­´Â ±Õ¿­ÀÇ ±¼°î°ú crack bridgingÀ¸·Î °ÅÄ£ ¿äö¸éÀÌ Çü¼ºµÇ°í,
±Õ¿­ÁøÀü °úÁ¤¿¡¼­ ÀÌµé ¿äö¸é »çÀÌ¿¡ ¸¶ÂûÀÛ¿ëÀÌ ÀϾ´Â ¾ç»óÀ» º¸¿´´Ù.
#ÃÊ·Ï#
Fatigue failure of ceramic materials occurs with crack propagation while tensile
stresses are applied in aqueous environments. dental ceramic materials A feldspathic
porcelain of VMK68, a castable glass ceramic of IPS-Empress and an alumina-glass
composite of In-Ceram. Specimens were prepared as 12¡¿3¡¿1 m in dimensions, and a
Victors-produced indentation crack was made at the center of the tensile surface with
loads of 9.8 N and 49.0 N. Test specimens were stored in distilled water at 37%, which
were broken under a statically loaded state and a crosshead speed of 0.5 mm/min by
3-point bend test. The radial cracks produced with Vickers indentation and fracture
surfaces were examined by a scanning electron microscope.
The results obtained were summarized as follows;
1. Half-penny type crack, bordered by small, radially shaped ridges, was examined at
the fracture origin containing the Vickers-produced indentation crack.
2. Fracture surfaces of the VMK68 and IPS-Empress showed the tendency of
cleavage hackle and the toughening mechanism of crack bridging by the dispersed
leucite crystals.
3. Fracture surface of the In-Ceram indicated the frictional interlocking of jogs having
the tendency of toughening by crack deflection, rather than by track bridging.

Å°¿öµå

fatigue failure; crack propagation; alumina-glass composite; castable glass ceramic;

¿ø¹® ¹× ¸µÅ©¾Æ¿ô Á¤º¸

 

µîÀçÀú³Î Á¤º¸

KCI