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Rheological properties of dental resin cements during polymerization

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ÀÌÀ縲, ÀÌÀçºÀ, ÇÑÁß¼®, ±è¼ºÈÆ, ¿©Àμº, ÇϽ·æ, ±èÈñ°æ,
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ÀÌÀ縲 ( Lee Jae-Rim ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
ÀÌÀçºÀ ( Lee Jai-Bong ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
ÇÑÁß¼® ( Han Jung-Suk ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
±è¼ºÈÆ ( Kim Sung-Hun ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
¿©Àμº ( Yeo In-Sung ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
ÇϽ·æ ( Ha Seung-Ryong ) - ¾ÆÁÖ´ëÇб³º´¿ø Ä¡°úÇб³½Ç
±èÈñ°æ ( Kim Hee-Kyung ) - ¼­¿ïº¸Èƺ´¿ø Ä¡°úÁø·á¼¾ÅÍ º¸Ã¶°ú

Abstract

¿¬±¸ ¸ñÀû: º» ¿¬±¸ÀÇ ¸ñÀûÀº ÁßÇÕ °úÁ¤ Áß Ä¡°ú¿ë ·¹Áø ½Ã¸àÆ®ÀÇ Á¡Åº¼º ¼ºÁúÀÇ º¯È­¸¦ °üÂûÇϱâ À§ÇÑ °ÍÀÌ´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý:: 6 Á¾·ùÀÇ ·¹Áø½Ã¸àÆ®(Clearfil SA luting, Panavia F 2.0, Zirconite, Variolink N, RelyX Unicem clicker, RelyX U200)°¡ À̹ø ½ÇÇè¿¡ »ç¿ëµÇ¾ú´Ù. AR1500 stress controlled rheometer¸¦ ÀÌ¿ëÇØ 32 µµ¿¡¼­ µ¿Àû ½Ã°£ °æ°ú ½ÃÇè(dynamic oscillation time sweep test)ÀÌ ½ÃÇàµÇ¾ú´Ù. °¢°¢ÀÇ ·¹Áø½Ã¸àÆ®ÀÇ Àü´Ü ÀúÀå °è¼ö(G¡®), Àü´Ü ¼Õ½Ç °è¼ö(G¡¯¡®), ¼Õ½Ç źÁ¨Æ®(tan delta), º¯À§·®À» 20ºÐ µ¿¾È 3¹ø¾¿ ¹Ýº¹ ÃøÁ¤ÇÏ¿´´Ù. ÃøÁ¤ °á°ú´Â ÀÏ¿ø¹èÄ¡ºÐ¼® ¹× Tukey¡®s hoc test·Î »çÈÄ °ËÁ¤À» ½ÃÇàÇÏ¿´´Ù(a=0.05).

°á°ú: ¸ðµç ·¹Áø ½Ã¸àÆ®´Â È¥ÇÕ ÈÄ ½Ã°£¿¡ µû¶ó G¡¯ °ªÀÌ Áõ°¡ÇÏ¿´°í, ÃÖÁ¾ÀûÀ¸·Î ¾ÈÁ¤»óÅ¿¡ µµ´ÞÇÏ¿´´Ù. ½ÇÇè Á¾·á ½ÃÁ¡¿¡¼­ RelyX U200Àº °¡Àå ³ôÀº G¡®°ªÀ» ³ªÅ¸³Â°í, RelyX Unicem (clicker type)°ú Variolink NÀÌ °¡Àå ³·Àº G¡®°ªÀ» ³ªÅ¸³Â´Ù. Tan delta¿Í º¯À§·®Àº ÀÏÁ¤ ¼öÁØÀÇ °ªÀ» À¯ÁöÇÏ´Ù°¡ G¡¯ÀÌ Áõ°¡Çϱ⠽ÃÀÛÇÏ´Â ½ÃÁ¡¿¡¼­ 0¿¡ µµ´ÞÇÏ¿´´Ù. ÀÌ´Â º¯À§·®ÀÌ 0¿¡ µµ´ÞÇÏ´Â ÁöÁ¡°ú °ÅÀÇ ÀÏÄ¡ÇÏ¿´À¸¸ç, ±× ½Ã°£Àº 6ºÐ ³»¿Ü¿´´Ù.

°á·Ð: º» ¿¬±¸¿¡¼­ RelyX U200Àº ´Ù¸¥ ·¹Áø ½Ã¸àÆ®¿Í ºñ±³ÇÏ¿© °¡Àå ¿À·£ ½Ã°£ µ¿¾È ¼Ò¼ºÀ» À¯ÁöÇÏ°í, °æÈ­ ¿Ï·á ÈÄ °¡Àå ³ôÀº °­µµ(rigidity)¸¦ º¸¿´´Ù. µû¶ó¼­ ¿©·¯ °³ÀÇ º¸Ã¶¹°À» µ¿½Ã¿¡ ÇÕÂøÇØ¾ß ÇÏ´Â °æ¿ì¿¡ RelyX U200ÀÌ À¯¿ëÇÒ °ÍÀ¸·Î »ç·áµÈ´Ù.

PURPOSE. The purpose of this study was to observe the change of viscoelastic properties of dental resin cements during polymerization.

MATERIALS AND METHODS. Six commercially available resin cement materials (Clearfil SA luting, Panavia F 2.0, Zirconite, Variolink N, RelyX Unicem clicker, RelyX U200) were investigated in this study. A dynamic oscillation-time sweep test was performed with AR1500 stress controlled rheometer at 32 degrees C. The changes in shear storage modulus (G¡®), shear loss modulus (G¡®¡¯), loss tangent (tan delta) and displacement were measured for twenty minutes and repeated three times for each material. The data were analyzed using one-way ANOVA and Tukey¡¯s post hoc test (a=0.05).

RESULTS. After mixing, all materials demonstrated an increase in G¡® with time, reaching the plateau in the end. RelyX U200 demonstrated the highest G¡¯ value, while RelyX Unicem (clicker type) and Variolink N demonstrated the lowest G¡® value at the end of experimental time. Tan delta was maintained at some level and reached the zero at the starting point where G¡¯began to increase. The tan delta and displacement of the tested materials showed similar pattern in the graph within change of time. The displacement of all 6 materials approached to zero within 6 minutes.

CONCLUSION. Compared to other resin cements used in this study, RelyX U200 maintained plastic property for a longer period of time. When it completed the curing process, RelyX U200 had the highest stiffness. It is convenient for clinicians to cement multiple units of dental prostheses simultaneously.

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Ä¡°ú¿ë ·¹Áø ½Ã¸àÆ®; À¯º¯ÇÐÀû Ư¼º; ÇǸ·µµ; Á¡Åº¼º
Dental resin cement; Rheological properties; Film thickness; Viscoelasticity

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