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MICROHARDNESS AND SURFACE ROUGHNESS OF SEALANT AND FLOWABLE COMPOSITE RESINS

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ÃÖÁöÀº ( Choi Ji-Eun ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

º» ¿¬±¸´Â ¿¹¹æÀû ·¹Áø ¼öº¹¼ú¿¡ ÀüÅëÀûÀ¸·Î »ç¿ëµÇ´ø ¼Ò¿Í¿­±¸ Àü»öÁ¦¸¦ ´ë½ÅÇÏ¿©, À¯µ¿¼º º¹ÇÕ ·¹ÁøÀÌ »ç¿ëµÉ °æ¿ìÀÇ Å¸ ´ç¼ºÀ» °ËÅäÇϱâ À§ÇØ ½ÃÇàµÇ¾ú´Ù. ºñÄ¿½º ¹Ì¼¼°æµµ¸¦ ÃøÁ¤Çϱâ À§ÇØ Á÷°æ 10 mm, ³ôÀÌ 3 mmÀÎ 11°³ÀÇ ½ÃÆíÀ» Á¦ÀÛÇÏ¿© ºñÄ¿½º ¹Ì¼¼°æµµ ÃøÁ¤±â(FM-7, FUTURE-TEC Inc., Japan)¸¦ ÀÌ¿ëÇÏ¿© ¾ÐÀÔÇÏÁß 50 gf, À¯Áö½Ã°£ 15ÃÊÀÇ Á¶°Ç ÇÏ¿¡¼­ ÃøÁ¤ÇÏ¿© °¢ ±ºÀÇ Æò±Õ°ªÀ» »êÃâ ÇÏ¿´´Ù. Ç¥¸éÁ¶µµ¸¦ ÃøÁ¤Çϱâ À§ÇØ Ä©¼Ö¸¶¸ð½ÃÇè±â(Toothbrush abrasive machine K236, Tokyo Machine Co., Japan) ·Î 4°³ÀÇ ½ÃÆí Ç¥¸é¿¡ 200 rpmÀÇ ¼Óµµ·Î 4000ȸÀÇ Ä©¼ÖÁúÀ» ½ÃÇàÇÑ µÚ Ç¥¸éÁ¶µµÇü»óÃøÁ¤±â(Form Talysurf series 2, Rank Taylor Hobson Co., England)¸¦ ÀÌ¿ëÇØ Ç¥¸éÁ¶µµ¸¦ ÃøÁ¤ÇÏ¿´´Ù. ¥á=0.05ÀÇ À¯ÀÇ ¼öÁØ¿¡¼­ Kruskal-Wallis rank test¿Í Mann-Whitney U test¸¦ »ç¿ëÇÏ¿´´Ù. ¶ÇÇÑ ÁÖ»çÀüÀÚÇö¹Ì°æÀ¸·Î °üÂûÇÏ¿© °¢ ±ºÀÇ ¸¶¸ð ¾ç»óÀ» ºñ±³ÇÏ¿© ´ÙÀ½°ú °° Àº °á·ÐÀ» ¾ò¾ú´Ù. 1. ºñÄ¿½º ¹Ì¼¼°æµµ ÃøÁ¤ °á°ú Filtek Z350 flowable (3M ESPE, U.S.A), Palfique Estelite LV (Tokuyama Dental, Japan), Ultraseal XT plus (Ultradent, U.S.A) ¼øÀ¸·Î ³ô°Ô ³ªÅ¸³µÀ¸¸ç ¸ðµç ±º °£¿¡ Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ ÀÖ ¾ú´Ù(p<0.0001). 2. Ç¥¸é Á¶µµ ÃøÁ¤ °á°ú, Ultraseal?, Estelite?, Z350? ¼øÀ¸·Î ³ô°Ô ³ªÅ¸³µÀ¸³ª Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ´Â ¾ø¾ú´Ù (p=0.116). 3. ¸¶¸ðµÇÁö ¾ÊÀº Ç¥¸é°ú ¸¶¸ð°¡ ÀϾ Ç¥¸éÀ» ÁÖ»çÀüÀÚÇö¹Ì°æÀ¸·Î °üÂûÇÑ °á°ú, Àü»öÁ¦ÀÎ Ultraseal XT plus¿Í À¯µ¿¼º º¹ÇÕ·¹ÁøÀÎ Palfique Estelite LV, ³ª³ëÇÊ·¯¸¦ ÇÔÀ¯ÇÑ À¯µ¿¼º º¹ÇÕ·¹ÁøÀÎ Filtek Z350 flowableÀÌ ¼­·Î ´Ù¸¥ ¸¶¸ð ¾ç »óÀÌ ³ªÅ¸³ª´Â °ÍÀ» º¼ ¼ö ÀÖ¾ú´Ù. ÀÌ»óÀÇ °á°ú¸¦ Åä´ë·Î ÇÒ ¶§, À¯µ¿¼º º¹ÇÕ ·¹ÁøÀÌ Àü»öÁ¦¿¡ ºñÇØ ¹°¼º Àû Ãø¸é¿¡¼­ ´õ ¿ì¼öÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù.

This study was performed to compare the wear resistance of sealant and flowable resins for analyzing the effect of flowable resin as a sealant in preventive resin restorations. Specimens were made and Vicker¡¯s hardness number and surface roughness were measured. SEM observations of the polished and abraded surfaces were established. Kruskal-Wallis rank test and Mann-Whitney U test at the significant level of ¥á=0.05 were used. The following results were obtained: 1. The microhardness was decreased among groups in following order: Z350 (3M ESPE, U.S.A), Estelite (Tokuyama Dental, Japan) and Ultraseal (Ultradent, U.S.A). There were significant differences in all groups (p<0.0001). 2. The surface roughness was decreased among groups in following order: Ultraseal XT plus, Palfique Estelite LV and Filtek Z350 flowable. However, there is no statistically significant differences in roughness among Estellite, Z350 and Ultraseal at the significance level of ¥á=0.05, with p=0.116 3. SEM observation of the unworn and worn surfaces revealed the qualitative differences in the wear appearance among groups. The results in this study indicate that flowable resin is better than sealant in aspect of physical properties.

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Flowable resin;Sealant;Microhardness;Surface roughness

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