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EVALUATION ON THE ABRASION RESISTANCE OF A SURFACE SEALANT

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±è¼ö¹Ì, ÇѼ¼Èñ, Á¶¿µ°ï,
¼Ò¼Ó »ó¼¼Á¤º¸
±è¼ö¹Ì ( Kim Soo-Mee ) - ¼­³²´ëÇб³ ÀÇ°ú´ëÇÐ Ä¡°úÇб³½Ç
ÇѼ¼Èñ ( Han Sae-Hee ) - Áß¾Ó´ëÇб³º´¿ø Ä¡°ú¼¾ÅÍ Ä¡°úº¸Á¸°ú
Á¶¿µ°ï ( Cho Young-Gon ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç

Abstract

ÀÌ ¿¬±¸´Â °­È­Çü ¹Ì¼¼ÀÔÀÚ º¹ÇÕ·¹ÁøÀÎ Micronew¿¡ Biscover ·¹ÁøÀü»öÁ¦¸¦ Àû¿ëÇÑ ÈÄ Ä©¼Ö¸¶¸ð½ÃÇèÀ» ½ÃÇàÇÏ¿© º¹ÇÕ·¹Áø Ç¥¸éÀÇ Á¶µµ¿Í Çö¹Ì°æÀû º¯È­¸¦ ºñ±³ÇÔÀ¸·Î½á ·¹ÁøÀü»öÁ¦¸¦ º¹ÇÕ·¹Áø Ç¥¸é¿¡ ÀçÀû¿ëÇÒ ½Ã±â¸¦ ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù. ºÐ¸® °¡´ÉÇÑ ¾Ë·ç¹Ì´½ ÆÇ°ú º¹ÇÕ·¹ÁøÀ» ÀÌ¿ëÇÏ¿© 8 ¡¿ 3 ¡¿ 2mm Å©±âÀÇ º¹ÇÕ·¹Áø ½ÃÆí 200°³¸¦ Á¦ÀÛÇÏ¿´´Ù. º¹ÇÕ·¹Áø ½ÃÆíÀÇ ¾çÂÊÇ¥¸éÀ» Sof-Lex disc·Î °ÅÄ£ ÀÔÀÚ¿¡¼­ Áß°£ ÀÔÀÚ±îÁö ¸¶¹«¸®ÇÑ ÈÄ ½Ç¿ÂÀÇ Áõ·ù¼ö¿¡ 24½Ã°£ µ¿¾È º¸°üÇÏ¿´´Ù. ½ÃÆíÀº disc·Î ¸¶¹«¸®¸¸ ½ÃÇàÇÑ F±º (n = 10)°ú ¸¶¹«¸® ÈÄ ·¹ÁøÀü»öÁ¦ÀÎ Biscover¸¦ Àû¿ëÇÑ B±º (n = 190)À¸·Î ºÐ·ùÇÏ¿´´Ù. B±ºÀº ´Ù½Ã Ä©¼ÖÁúÀ» °¡ÇÏÁö ¾ÊÀº B-IM±º (n = 10)°ú Ä©¼ÖÁúÀ» °¡ÇÑ ±º (n = 180, B-1±º¿¡¼­ B-18 ±º)À¸·Î ºÐ·ùÇÏ¿´´Ù. Ä©¼ÖÁúÀ» °¡ÇÑ ±ºÀº Ä©¼Ö¸¶¸ð°Ë»ç±âÀÇ ¼öÁ¶¿¡ Æ丮¿À Ä¡¾à°ú Áõ·ù¼ö¸¦ ¹«°Ô ºñ 50 : 50À¸·Î È¥ÇÕÇÏ¿© ºÎÀº ´ÙÀ½, ȨÀÌ ÆÄÁø ¾Ë·ç¹Ì´½ ºí·Ï¿¡ °¢ ±ºÀÇ ½ÃÆíÀ» À§Ä¡½ÃÅ°°í Ä©¼ÖÀ» °íÁ¤ÀåÄ¡¿¡ ºÎÂøÇÏ¿© Àü, ÈÄ ¿Õº¹¿îµ¿À» °¡ÇÏ¿© Ä©¼ÖÁúÀ» °¡ÇÏ¿´´Ù. Ä©¼ÖÁúÀº B-1 ±º¿¡¼­ B-18±º ±îÁö °¢°¢ 900ȸ¾¿ Áõ°¡½ÃÄÑ 16,200ȸ ±îÁö ½ÃÇàÇÏ¿´´Ù Ç¥¸éÁ¶µµÃøÁ¤±â¸¦ »ç¿ëÇÏ¿© °¢ ±ºÀÇ º¹ÇÕ·¹Áø Ç¥¸éÀÇ Æò±Õ Ç¥¸éÁ¶µµ °ª (Ra)À» »êÃâÇÑ ÈÄ Åë°èÀûÀ¸·Î ºÐ¼®ÇÏ¿´°í, ÁÖ»çÀüÀÚÇö¹Ì°æÇÏ¿¡¼­ °¢ ±ºÀÇ ´ëÇ¥ÀûÀÎ ½ÃÆí 1°³¸¦ °üÂûÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù. 1. F±ºÀÇ Ra´Â 0.898 ¡¾ 0.145 mum, B-IM±ºÀÇ Ra´Â 0.289 ¡¾ 0.142 mum¸¦ ³ªÅ¸³ÂÀ¸¸ç, B-1 ±º¿¡¼­ B-18 ±º±îÁöÀÇ Ra´Â Á¡Â÷ÀûÀ¸·Î Áõ°¡ÇÏ¿© B-1 ±º¿¡¼­ 0.299 ¡¾ 0.48 mum, B-18 ±º¿¡¼­ 0.642 ¡¾ 0.313 mum±îÁö ³ªÅ¸³µ´Ù. 2. Ra ÃÖÁ¾ ±ºÁýÁß½ÉÀº ±ºÁý 1 (B-IM~B-7)¿¡¼­ 0.361 mum, ±ºÁý 2 (B-8~B-14)¿¡¼­ 0.511 mum, ±ºÁý 3 (B-15~B-18)¿¡¼­ 0.624 mum¸¦ ³ªÅ¸³»¾î °¢ ±ºÁýÀÇ Ra ÃÖÁ¾ ±ºÁýÁ᫐ °£¿¡ Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÑ Â÷À̸¦ ³ªÅ¸³»¾ú´Ù. (F = 49.705, p = 0.000) 3. B-IM±ºÀÇ Ra Áõ°¨À²Àº F ±º¿¡ ºñÇØ 210.72%°¨¼ÒµÇ¾úÀ¸¸ç, B-8 ±º°ú B-15±ºÀÇ Ra Áõ°¨À²Àº B-IM±º¿¡ ºñÇØ °¢°¢ 35.49%¿Í 51.35% Áõ°¡µÇ¾ú´Ù. 4. FE-SEM °üÂû¿¡¼­ B-IM ±ºÀº ¸Å¿ì ÆòÈ°ÇÑ º¹ÇÕ·¹Áø Ç¥¸éÀ» ³ªÅ¸³»¾ú°í, B-8 ±ºÀº ÀüüÀûÀ¸·Î ÆòÈ°ÇÑ º¹ÇÕ·¹Áø Ç¥¸éÀ» º¸¿´Áö¸¸ Ç¥¸é¿¡ ¼öÁ÷À¸·Î ¾ÆÁÖ ¾èÀº ÈìÁýÀ» ³ªÅ¸³»¾ú´Ù. B-15 ±ºÀº º¹ÇÕ·¹Áø Ç¥¸éÀÇ Áß¾Ó¿¡¼­ B-8±ºº¸´Ù ´õ ³Ð°í ºÒ±ÔÄ¢ÇÑ ¼öÁ÷ÀÇ ÈìÁýÀ» ³ªÅ¸³»¾ú°í, B-18±ºÀº º¹ÇÕ·¹Áø Ç¥¸é Àüü¿¡ ³ÐÀº ÈìÁýÀ» ³ªÅ¸³»¾ú´Ù.

The purpose of this study was to evaluate the abrasion resistance of surface penetrating sealant which was applied on a composite resin restoration and to provide proper time to reapply sealant on composite resin surface. Two hundred rectangular specimens, sized 8 ¡¿ 3 ¡¿ 2mm, were made of Micronew (Bisco, Inc., Schaumburg, IL, U.S.A) and divided into two groups; F group (n = 10) was finished with coarse and medium grit of Sof-Lex discs and BisCoverwas applied B group (n = 190) after finishing with discs. B group was again subdivided into nineteen subgroups From B-1 group to B-18 group were subjected to toothbrush abrasion test using a distilled water-dentifrice slurry and toothbrush heads B-IM group was not subjected to toothbrush abrasion test. Average surface roughness (Ra) of each group was calculated using a surface roughness tester (Surfcorder MSE-1700: Kosaka Laboratory Ltd., Tokyo, Japan) . A representative specimen of each group was examined by FE-SEM (S-4700: Hitachi High Technologies Co., Tokyo, Japan). The data were analysed using cluster analysis, paired t-test, and repeated measure ANOVA. The results of this study were as follows; 1. Ra off group was 0.898 ¡¾ 0.145 mum and B-IM group was 0.289 ¡¾ 0.142 mum. Ra became higher from B-1 group (0.299 ¡¾ 0.48 mum to B-18 group (0.642 ¡¾ 0.313 mum. 2. Final cluster center of Ra was 0.361 mum in cluster 1 (B-1M~B-7), 0.511 mum in cluster 2 (B-8~B-14) and 0.624mum in cluster 3 (B-15~B-18). There were significant difference among Ra of three clusters. 3 Ra of B-IM group was decreased 210.72% than Ra of F group. Ra of B-8 group and B-15 group was increased 35.49% and 51.35% respectively than Ra of B-IM group. 4. On FE-SEM, B-IM group showed the smoothest resin surface. B-8 group and B-15 group showed vertically shallow scratches , and wide and irregular vertical scratches on composite resin surface respectively. Within a limitation of this study, finished resin surface will be again smooth and glazy if BisCover would be reapplied within 8 to 14 months after applying to resin surface.

Å°¿öµå

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Abrasion resistance;Resin surface sealant;Toothbrush abrasion test;Surface roughness;Finishing method;Polishing instrument

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