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Effect of coloring liquids on biaxial flexural strength of monolithic zirconia

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Á¤Ã¤À² ( Jung Chae-Yul ) - Wonkwang University Sanbon Dental Hospital Department of Prosthodontics
±è¹ÎÁ¤ ( Kim Min-Jeong ) - Wonkwang University Sanbon Dental Hospital Department of Prosthodontics
±èÀçÇö ( Kim Jae-Hyun ) - Wonkwang University Sanbon Dental Hospital Department of Prosthodontics

Abstract

¸ñÀû: º» ¿¬±¸ÀÇ ¸ñÀûÀº À¯»öÀÇ ´ÜÀϱ¸Á¶ Áö¸£ÄڴϾÆÀÇ ÀÌÃà ±¼°î °­µµ¿Í °æµµ¸¦ Æò°¡ÇÏ°í, Âø»ö ¿ë¾×ÀÇ Àû¿ë¿¡ µû¸¥ Áö¸£ÄڴϾÆÀÇ °­µµ º¯È­¸¦ ¾Ë¾Æº¸´Â °ÍÀÌ´Ù.

Àç·á ¹× ¹æ¹ý: ´ÜÀÏ ±¸Á¶ Áö¸£ÄÚ´Ï¾Æ ½ÃÆí(Eclipse V2.0, AMS, Korea)À» µ¿ÀÏ Å©±âÀÇ µð½ºÅ© ÇüÅ·Π¹Ð¸µÇÏ°í, Áö¸£ÄÚ´Ï¾Æ Âø»ö ¿ë¾×ÀÇ Àû¿ë ½Ã°£¿¡ µû¶ó 4°³ÀÇ ±ºÀ¸·Î ºÐ·ù(n = 12)ÇÏ¿´´Ù(PU, ST, OV, PS). °¢ ½ÃÆíÀÇ ÀÌÃà ±¼°î °­µµ¸¦ ÃøÁ¤ÇÏ°í, Vickers °æµµ¸¦ ÃøÁ¤Çß´Ù. ÆÄÀý ½ÃÇè ÀÌÈÄ, ÆÄÀýµÈ ½ÃÆíÀ» ÀÌ¿ëÇÏ¿©, X-¼± ȸÀý ºÐ¼®À» ½ÃÇàÇÏ¿´´Ù. °á°ú ºÐ¼®Àº One-way ANOVA¸¦ ÀÌ¿ëÇÏ¿© ºÐ¼®Çß´Ù.

°á°ú: 2Ãà ±¼°î °­µµ ½ÇÇè¿¡¼­´Â ±×·ì °£¿¡ À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù. ÇÏÁö¸¸ Vickers °æµµ ½ÇÇè¿¡¼­ Á¦Á¶»ç Áö½Ã´ë·Î Âø»ö¿ë¾×À» Àû¿ëÇÑ ±×·ìÀÌ Âø»ö ¿ë¾×À» Àû¿ëÇÏÁö ¾ÊÀº ±×·ìº¸´Ù À¯ÀÇÇÏ°Ô °ªÀÌ ³ô¾Ò´Ù (P = .038). ³ª¸ÓÁö ±×·ì °£ Vickers °æµµ´Â À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù (P > .05). X-ray ȸÀý ºÐ¼® °á°ú ¸ðµç ±ºÀÇ X-ray ȸÀý ºÐ¼® »ó¿¡´Â Á¤¹æÁ¤»óÀÇ Æ¯ÀÌÀû ÇÇÅ©¸¦ º¸¿©ÁÖ¾ú°í, ¸ðµç ´Ü»çÁ¤»ó ºÐÀ²Àº 25%¹Ì¸¸À̾ú´Ù.

°á·Ð: Áö¸£ÄÚ´Ï¾Æ Âø»ö¿ë¾×ÀÇ Àû¿ë ¿©ºÎ ¹× Àû¿ë ½Ã°£Àº ÀÌÃà ±¼°î °­µµ¿¡ À¯ÀÇÇÑ ¿µÇâÀ» ¹ÌÄ¡Áö ¾Ê¾Ò´Ù. Vickers °æµµ´Â Á¦Á¶»ç Áö½Ã´ë·Î Âø»ö ¿ë¾×À» Àû¿ëÇÑ ±×·ì°ú Âø»ö ¿ë¾×À» Àû¿ëÇÏÁö ¾ÊÀº ±×·ì °£¿¡ ´Â À¯ÀÇÇÑ Â÷ÀÌ°¡ ÀÖ¾úÀ¸³ª, ³ª¸ÓÁö ±×·ì °£¿¡´Â À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù. º» ½ÇÇè¿¡ »ç¿ëÇÑ Áö¸£ÄÚ´Ï¾Æ ½ÃÆíÀÇ ÀÌÃà ±¼°î °­µµ °á°ú´Â Ä¡°ú¿ë ¼¼¶ó¹Í ¿ëµµ¿¡ µû¸¥ ÃÖ¼Ò ±¼°î °­µµ ±âÁØÀÇ Class 5¿¡ ÇØ´çÇÏ¿´´Ù.

Purpose. The aim of this study was to evaluate biaxial flexural strength and hardness of colored monolithic zirconia after dipping in different time intervals of coloring solution.

Materials and Methods. Disk shaped specimens were prepared from monolithic zirconia (Eclipse V2.0, AMS, Gimpo, Korea). Four experimental groups were categorized (n = 12) due to coloring time (PU (0s); ST (8s); OV (1 min); PS (preshade)), to evaluate biaxial flexural strength and Vickers hardness. After fracture, X-ray diffraction analysis was performed using fractured specimens. Results were analyzed with one-way ANOVA test.

Results. There was no significant difference between groups in the biaxial flexural strength test. However, in the Vickers hardness test, the group with standard dipping time (ST) showed significantly higher value than the group without dipping in coloring liquid (PU)(P=.038). Also, there was no significant difference in the rest of the groups (P>.05). As a result of X-ray diffraction analysis, specific peaks of tetragonal phase were shown and the volume of monoclinic phase fraction was lower than 25%.

Conclusion. Although this study has several limitations, coloring liquids had no significant effect on biaxial flexural strength. Vickers hardness was significantly different between the group to which the coloring liquid was applied and the group to which the coloring solution was not applied, but there was no significant difference between the other groups. Also, the flexural strength of monolithic zirconia corresponds to Class 5 of the minimal flexural strength standard according to the use of dental ceramics.

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±¼°î °­µµ; °æµµ; Âø»ö; º¸Ã¶¹° Âø»ö; Áö¸£ÄڴϾÆ
Flexural strength; Hardness; Pigmentation; Prosthesis coloring; Zirconia

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