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The effet of cooling rate on the residual stresses in the veneer ceramics of zirconia-ceramic restorations: a literature review

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ÀåÀç½Â ( Chang Jea-Seung ) - ¿¬¼¼´ëÇб³ ¿ëÀμ¼ºê¶õ½ºº´¿ø Ä¡°ú
±è¼±Àç ( Kim Sun-Jai ) - ¿¬¼¼´ëÇб³ °­³²¼¼ºê¶õ½º Ä¡°úº´¿ø Ä¡°úº¸Ã¶°ú

Abstract

ÃÖ±Ù ¸¹ÀÌ ÀÌ¿ëµÇ°í ÀÖ´Â Áö¸£ÄڴϾÆ-µµÀç ¼öº¹¹°Àº ±× Àû¿ë¹üÀ§°¡ Á¡Â÷·Î Áõ°¡ÇÏ°í ÀÖ´Ù. Àӻ󿬱¸°á°ú¿¡¼­ Áö¸£ÄÚ´Ï¾Æ ÄÚ¾î´Â ¸Å¿ì ³ôÀº ¼º°øÀ²À» º¸ÀÌ°í ÀÖÀ¸³ª ÄÚ¾î À§¿¡ Ã༺µÇ´Â ÀüÀåµµÀç´Â ±âÁ¸¿¡ ÀÌ¿ëµÇ¾î¿Â ±Ý¼Ó-µµÀç ¼öº¹¹°¿¡ ºñÇØ ³ôÀº ÆÄÀýºóµµ¸¦ ³ªÅ¸³»°í ÀÖ´Ù. ÀÌ·¯ÇÑ ÆÄÀýÀÇ ¿øÀÎÀ¸·Î ¿©·¯°¡Áö ¿ä¼Ò°¡ °Å·ÐµÇ°í ÀÖÀ¸³ª ¾ÆÁ÷ ¸íÈ®ÇÏ°Ô ¼³¸íÇÏ°í ÀÖÁö´Â ¸øÇÏ´Ù. ÃÖ±Ù ÀüÀåµµÀç Ã༺ ÈÄ ³Ã°¢°úÁ¤¿¡¼­ ÀÜÁ¸ÇÏ´Â ÀÜ·ùÀÀ·ÂÀÌ ÀüÀåµµÀçÀÇ ÆÄÀý¿¡ ¿µÇâÀ» ¹ÌÄ¥ ¼ö ÀÖ´Ù´Â ¿¬±¸°á°ú°¡ ¼Ó¼Ó ¹ßÇ¥µÇ°í ÀÖ´Ù. º» °íÂû¿¡¼­´Â ÀÜ·ùÀÀ·ÂÀÌ ¹«¾ùÀÌ¸ç µµÀç Ã༺ ÈÄ ³Ã°¢°úÁ¤¿¡¼­ ¾î¶² ±âÀüÀ» ÅëÇØ ÀüÀåµµÀç ³»¿¡ ÀÜ·ùÀÀ·ÂÀÌ ¹ß»ýÇÏ´ÂÁö, ¶ÇÇÑ ±âÁ¸ÀÇ ±Ý¼Ó-µµÀç ¼öº¹¹°¿¡¼­ ¹ß»ýÇÏ´Â ÀÜ·ùÀÀ·Â°ú´Â ¾î¶² Â÷ÀÌ°¡ ÀÖ´ÂÁö ¹®Çå°íÂûÀ» ÅëÇØ »ìÆ캸°íÀÚ ÇÑ´Ù.

Nowadays, dental zirconia is widely used as a framework material for a fixed dental prosthesis as well as a single restoration. However, clinical studies have reported high incidence of veneer chipping of zirconia-ceramic restorations compared to that of metal-ceramics. Several factors were raised as the possible causes of veneer ceramic chipping, however, it is still in debate. Recently, residual stresses in the veneer ceramics after cooling process gathers attention as one possible cause of chipping and many studies reported that the rate of cooling significantly influenced the types and the amount of residual stress. The purpose of current review was to briefly describe the effect of cooling rate on the residual stress in zirconia-ceramics. It was also described that the different behavior of residual stress between zirconia-ceramics and metal-ceramics following different cooling rate.

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Zirconia; Veneer ceramic; Chipping; Residual stress; Cooling rate

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