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A STUDY ON WEAR RESISTANCE OF FLOWABLE COMPOSITE RESINS

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Abstract

½Ã¼ú½Ã°£À» ÁÙÀ̴µ¥ À¯¸®ÇÑ Àç·áÀÎ À¯µ¿¼º º¹ÇÕ·¹ÁøÀ» À¯±¸Ä¡ºÎ¿¡ »ç¿ëÇÏ·Á°í °í·ÁÇÒ ¶§ Áß¿äÇÑ ¹°¼º Áß Çϳª´Â ¸¶¸ðÀúÇ×¼ºÀÌ´Ù. ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº À¯µ¿¼º º¹ÇÕ·¹ÁøÀÇ ¸¶¸ðÀúÇ×¼ºÀ» ÀϹݺ¹ÇÕ·¹ÁøÀÇ ¸¶¸ðÀúÇ×¼º°ú ºñ±³ÇÏ´Â °ÍÀÌ´Ù. ½ÇÇè¿¡ »ç¿ëµÈ À¯µ¿¼º º¹ÇÕ·¹ÁøÀ¸·Î 1±º¿¡¼­´Â Arabesk flow(VOCO. Germany), 2±º¿¡¼­´Â Tetric flow(Vivadent, Liechtenstein), 3±º¿¡¼­´Â Aeliteflow(Bisco, U.S.A), 4±º¿¡¼­´Â Filtek flow(3M Dental Co. U.S.A)À» »ç¿ëÇÏ¿´À¸¸ç ´ëÁ¶±ºÀ¸·Î »ç¿ëÇÑ 5±ºÀÇ º¹ÇÕ·¹ÁøÀº Z100(3M Dental Co. U.S.A)À̾ú´Ù.
½ÃÆíµé(n=10)Àº µÎ²² 2mm, Áö¸§ 5mmÀÇ ¿øÅë¸ð¾çÀ¸·Î Á¦ÀÛÇÏ¿© ¸¶¸ð½ÃÇè Àü 37¡ÉÀÇ Áõ·ù¼ö¿¡¼­ 7ÀÏ µ¿¾È ´ã°¡ ³õ¾Ò´Ù. Á¦1¼Ò±¸Ä¡¿Í ·¹Áø½ÃÆíÀ» MTS ½Ã½ºÅÛ¿¡¼­ 2Hz·Î 50,000ȸ Á¢ÃË, ¸¶¸ð½ÃÄ×´Ù. ¸¶¸ð½ÃÇè½Ã lateral excursionÀº 0.4mm, ±³ÇÕ·ÂÀº 2-100NÀÇ Á¶°ÇÀ̾ú´Ù. ¸¶¸ð½ÃÇèÈÄ ¸¶¸ðµÈ ºÎÇÇ, Ãִ븶¸ð±íÀÌ, Àç·áÀÚüÀÇ Ç¥¸é°æµµ¸¦ ÃøÁ¤ÇÏ¿´°í ¸¶¸ðµÇÁö ¾ÊÀº Ç¥¸é°ú ¸¶¸ð°¡ ÀϾ Ç¥¸éÀ» ÁÖ»çÀüÀÚÇö¹Ì°æÀ¸·Î °üÂûÇÏ¿´À¸¸ç ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ¸¶¸ðµÈ ºÎÇÇ´Â 3±º¿¡¼­ °¡Àå Àû¾ú°í 4±º¿¡¼­ °¡Àå ¸¹¾ÒÀ¸¸ç 3±º<1±º<2±º<5±º<4±ºÀÇ ¼ø¼­·Î Áõ°¡ÇÏ¿´´Ù.
2. 3±º, 1±º, 2±ºÀº 5±ºÀ̳ª 4±º¿¡ ºñÇØ Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô ¸¶¸ðºÎÇÇ°¡ Àû¾ú´Ù(p<0.05). ±×·¯³ª, 3±º, 1±º, 2±º »çÀÌ¿¡¼­¿Í 5±º, 4±º »çÀÌ¿¡¼­´Â °¢°¢ Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù.
3. Ãִ븶¸ð±íÀÌ´Â 1±º¿¡¼­ °¡Àå ³·¾Ò°í, 4±º¿¡¼­ °¡Àå ±í¾úÀ¸¸ç 1±º<3±º<5±º<2±º<4±ºÀÇ ¼ø¼­·Î Áõ°¡ÇÏ¿´´Ù.
4. 5±ºÀÇ Ç¥¸é°æµµ´Â ´Ù¸¥ À¯µ¿¼º º¹ÇÕ·¹Áø±º¿¡ ºñÇØ Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô ³ô¾ÒÀ¸³ª(p<0.05). ¸¶¸ðºÎÇdzª Ãִ븶¸ð±íÀÌ¿Í´Â Åë°èÀûÀ¸·Î À¯ÀÇÇÑ »ó°ü°ü°è¸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù.
5. ¸¶¸ðµÇÁö ¾ÊÀº Ç¥¸é°ú ¸¶¸ð°¡ ÀϾ Ç¥¸éÀ» ÁÖ»çÀüÀÚÇö¹Ì°æÀ¸·Î °üÂûÇÑ °á°ú, À¯µ¿¼º º¹ÇÕ·¹Áø±º°ú 5±º »çÀÌ¿¡ ¸¶¸ð¾ç»óÀÌ ´Ù¸£°Ô ³ªÅ¸³ª´Â °ÍÀ» º¼ ¼ö ÀÖ¾ú´Ù.
When we use the flowable resin on the primary molars for quick handling, one of the most important property is the wear resistance. This study was performed to compare the wear resistance characteristics of four flowable composite resins IArabesk flow (group 1), Tetric flow (group 2). Aeliteflow (group 3), Filtek flow (group 4)3 to that of one control composite resin (Z100 (group 5)). Specimen discs(n=10), 10mm wide and 2mm thick, were stored in distilled water at 37t for 7 days prior to testing. The specimens were subjected to 50,000 strokes at 2 Hz on the MTS system. During the test, the following parameters were maintained the lateral excursion at 0.4mm. occlusal force at 2-100N with a force profile in the form of a half sine wave.
The measurements of volume loss, depth of wear. and Vicker¢¥ s hardness number of composite resins, and SEM observations of the polished and abraded surfaces were established. One-way ANOVA and Scheffe¢¥ s multiple comparison test were employed to detect statistically significant differences among the flowable composite resin groups and the control composite group at P(.05.
The following results were obtained
1. Group 3 showed the least volume loss, while group 4 showed the greatest. The mean volume loss increased in the following order: group 3(group 1(group 2(group 5(group 4.
2. Group 3, group 1, and group 2 showed significantly lesser volume loss compared to group 5 and group 4(p(0.05). However, There was no statistically significant difference among group 3, group 1, and group 2. There was no statistically significant difference between group 5 and group 4.
3. Group 1 showed the shallowest depth of wear, while group 4 showed the deepest. The mean depth of wear increased in the following order: group 1(group 3Kgroup 5Kgroup 2(group 4.
4. Group 5 showed significantly highest hardness value compared to the flowable composite resin
groups(p(0.05), but there was no correlation between wear resistance and Vickers hardness number.
5. SEM observation of the unworn and worn surfaces revealed the differences in the wear appearance between
the flowable composite resin groups and the control.

Å°¿öµå

À¯µ¿¼º º¹ÇÕ ·¹Áø;¸¶¸ðÀúÇ×¼º;¸¶¸ðºÎÇÇ;Ãִ븶¸ð±íÀÌ;Ç¥¸é°æµµ;ÁÖ»çÀüÀÚÇö¹Ì°æ;Flowable composite resin;Wear resistance;Volumetric wear;Maximum wear depth;Vickers hardness number;SEM

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