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Effect of thermocycling on shear bond strength and mode of failure of bonded retainer using flowable composite resin

Korean Journal of Orthodontics 2005³â 35±Ç 4È£ p.295 ~ 301
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Abstract

ÀÌ ¿¬±¸´Â flowable composite resinÀ» ÀÌ¿ëÇÑ Á¢Âø½Ä À¯ÁöÀåÄ¡¸¦ ¿­¼øȯ½ÃŲ ÈÄ °áÇÕ°­µµ¿Í ÆÄÀý¾ç»óÀ» Á¶»çÇÏ¿© flowable composite resinÀÌ Á¢Âø½Ä À¯ÁöÀåÄ¡ÀÇ ·¹Áø Á¢ÂøÁ¦·Î¼­ À¯¿ëÇÑÁö¸¦ ¾Ë¾Æº¸±â À§ÇØ ½ÃÇàµÇ¾ú´Ù. ±³Á¤Ä¡·á¸¦ ¸ñÀûÀ¸·Î ¹ß°ÅÇÑ 160°³ÀÇ Ä¡¾Æ·Î 80°³ÀÇ ½ÃÆíÀ» Á¦ÀÛÇÏ°í 40°³¾¿ µÎ ±ºÀ¸·Î ³ª´©¾î Á¢Âø½Ä À¯ÁöÀåÄ¡¸¦ Á¦ÀÛÇÏ¿´´Ù(Group G: ÀÏ¹Ý º¹ÇÕ·¹ÁøÀÎ CharmFil, Group F: flowable composite resinÀÎ CharmFil Flow, wire: Tri-flex). °¢ ±ºÀ» 20 °³¾¿ 2 °³ÀÇ subgroupÀ¸·Î ³ª´©¾ú´Ù(Subgroup 24: »ý¸®½Ä¿°¼ö¿¡ 24½Ã°£ µ¿¾È º¸°ü, Subgroup T : 37¡É »ý¸®½Ä¿°¼ö¿¡ 24 ½Ã°£ µ¿¾È º¸°üÇÑ ÈÄ 5 ¡¾ 2¡É ~55¡¾ 2¡É ¼öÁ¶¿¡ 500ȸ ¿­¼øȯ). À¯ÁöÀåÄ¡ÀÇ wire ÁßÁ¡¿¡ ¼öÁ÷Àü´Ü·ÂÀ» Áָ鼭 ÆÄÀýµÇ´Â ¼ø°£ÀÇ ÇÏÁßÀ» ÃøÁ¤ÇÏ¿© ºñ±³ÇÏ¿´À¸¸ç, ±¤ÇÐÀÔü Çö¹Ì°æÀ¸·Î ÆÄÀý¸éÀ» °üÂûÇÏ¿© ÆÄÀý¾ç»óÀ» ºñ±³ÇÏ¿´´Ù. ±× °á°ú, µÎ ±ºÀÇ Àü´Ü°áÇÕ°­µµ ¹× ÆÄÀý¾ç»ó¿¡´Â Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù. µû¶ó¼­, Àü´Þ°áÇÕ°­µµ¿Í ÆÄÀý¾ç»óÀÇ Ãø¸é¿¡¼­¸¸ º»´Ù¸é flowable composite resinÀ» À¯ÁöÀåÄ¡ÀÇ ·¹Áø Á¢ÂøÁ¦·Î ÃæºÐÈ÷ Àû¿ë½Ãų ¼ö ÀÖÀ» °ÍÀ¸·Î º»´Ù.

The purpose of this study was to evaluate the effects of thermocycling on shear bond strength and mode of failure of orthodontic bonded retainer using flowable composite resin and to ascertain whether the flowable composite resin is useful for use as adhesive for orthodontic bonded retainers. One hundred and sixty freshly extracted human premolars were collected and eighty bonded retainer specimens were fabricated. They were randomly separated into 2 groups (Group G: general composite resin-CharmFil, Group F: flowable composite resin-CharmFil Flow, wire: Tri-flex). Each group was divided into 2 subgroups (Subgroup 24: stored in water at 37¡É for 24 hours for baseline data, Subgroup T: stored in water at 37¡É for 24 hours and thermocycled between 5 ¡¾ 2¡É and 55¡¾ 2¡É for 500 cycles before testing the in vitro shear bond strength). Shear bond strength was measured and mode of failure was evaluated with a stereomicroscope. There was no statistical difference in shear bond strength and mode of failure between the bonded retainer using general composite resin and flowable composite resin. Therefore, in considering shear bond strength and mode of failure, it is sufficient to use flowable composite resin as resin adhesives for bonded retainers.

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¿­¼øȯ;Á¢Âø½Ä À¯ÁöÀåÄ¡;°áÇÕ°­µµ;Thermocycling;Bonded retainer;Bond strength

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SCI(E)
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