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THE EFFECTS OF NANO-SIZED HYDROXYAPATITE ON DEMINERALIZATION RESISTANCE AND BONDING STRENGTH IN LIGHT-CURED GLASS IONOMER DENTAL CEMENT

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Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº ±¤ÁßÇÕÇü ±Û¶ó½º¾ÆÀÌ¿À³ë¸Ó ½Ã¸àÆ®¿¡ ¸¶ÀÌÅ©·Î ÀÔÀÚÀÇ ÇÏÀ̵å·Ï½Ã¾ÆÆÄŸÀÌÆ®¿Í ³ª³ë¹ÌÅÍ ÀÔÀÚÀÇ ÇÏÀ̵å·Ï½Ã¾ÆÆÄŸÀÌÆ®¸¦ ÷°¡ÇÏ¿´À» ¶§ ¹°¸®Àû ¼ºÁú°ú Żȸ ÀúÇ×, °áÇÕ °­µµÀÇ Â÷À̸¦ ºñ±³Çϱâ À§ÇÔÀÌ´Ù. ½ÇÇè¿¡ »ç¿ëµÈ ±¤ÁßÇÕÇü ±Û¶ó½º¾ÆÀÌ¿À³ë¸Ó ½Ã¸àÆ®´Â Fuji II LC ¿´°í ¼ø¼öÇÑ Fuji II LC GIC´Â ´ëÁ¶±ºÀ¸·Î, 15% micro HA- Fuji II LC GIC´Â ½ÇÇ豺 1, 15% nano HA- Fuji II LC GIC´Â ½ÇÇ豺 2·Î ¼³Á¤ÇÑ ÈÄ ½ÇÇèÀ» ÁøÇàÇÏ¿´°í ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù. 1. CLSMÀ¸·Î Żȸ Ç¥¸é ±íÀ̸¦ °üÂûÇÑ °á°ú ´ëÁ¶±º º¸´Ù ½ÇÇ豺¿¡¼­ ¹ý¶ûÁúÀÇ Å»È¸°¡ ´ú ¹ß»ýÇÏ¿´°í, ½ÇÇ豺 1 º¸´Ù ½ÇÇ豺 2¿¡¼­ ¹ý¶ûÁúÀÇ Å»È¸°¡ Àû°Ô °üÂûµÇ¾ú´Ù. 2. SEMÀ» ÀÌ¿ëÇÑ Å»È¸¸é °üÂû½Ã ´ëÁ¶±º¿¡¼­ ¹ý¶ûÁúÀÇ Å»È¸°¡ ´õ ¸¹ÀÌ ÀϾ°í, ½ÇÇ豺Àº ÇÏÀ̵å·Ï½Ã¾ÆÆÄŸÀÌÆ®ÀÇ ¿µÇâÀ¸·Î Żȸ°¡ ´ú ÀϾ Ç¥¸éÀÔÀÚ°¡ º¸´Ù ±ÔÄ¢ÀûÀ̾ú´Ù. µÎ ½ÇÇ豺À» ºñ±³ÇßÀ» ¶§ ½ÇÇ豺 2°¡ ½ÇÇ豺 1 º¸´Ù Żȸ¿¡ ÀúÇ×ÇÏ¿´´Ù. 3. °áÇÕ °­µµ´Â ´ëÁ¶±º, ½ÇÇ豺 1, ½ÇÇ豺 2 ¼øÀ¸·Î Áõ°¡ÇßÀ¸¸ç ¼¼ ±º°£¿¡ Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÒ ¸¸ÇÑ Â÷ÀÌ°¡ ÀÖ¾ú´Ù (p < 0.05). 4. SEM »ó¿¡¼­ °áÇÕ °­µµ ÃøÁ¤ ÈÄ ÆÄÀýµÈ ¸éÀ» °üÂûÇÑ °á°ú ÇÏÀ̵å·Ï½Ã¾ÆÆÄŸÀÌÆ®¸¦ Æ÷ÇÔÇÏ´Â ½ÇÇ豺¿¡¼­ °ñ À¯»ç ¾ÆÆÄ Å¸ÀÌÆ® ÃßÁ¤ ÀÔÀÚ°¡ °üÂûµÇ¾úÀ¸¸ç ½ÇÇ豺 1 º¸´Ù ½ÇÇ豺 2¿¡¼­ ´õ ¸¹Àº ÀÔÀÚ°¡ Çü¼ºµÇ¾ú´Ù.

The aim of this study was to evaluate the effect of incorporated nano HA on the demineralization resistance and bonding strength of LC GIC in comparison with micro HA. Fuji II LC GIC was used as the control group and a base material for experimental groups. Two experimental groups were prepared. One was prepared by adding 15% micro HA to LC GIC by weight ratio (Exp. 1), and the other was prepared by adding 15% nano HA instead (Exp. 2). According to the results, the following conclusions could be obtained. 1. Observing under the CLSM, the control group showed thicker enamel demineralization layer than in the experimental groups, and the Exp. 2 group showed the thinnest demineralization layer. 2. In SEM analysis, there was greater enamel demineralization in the control group. The Exp. 2 group was more resistant to demineralization compared to the Exp. 1 group. 3. The bonding strength was found to be in the increasing order of control, Exp. 1, and Exp. 2 group (p < 0.05). 4. Observing the fractured surfaces under SEM after the bonding strength test was performed, there were bone-like apatite particles formed in HA-added experimental groups, and a greater number of bone-like apatite particles were formed in the Exp. 2 group compared to the Exp. 1 group.

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±¤ÁßÇÕÇü ±Û¶ó½º¾ÆÀÌ¿À³ë¸Ó ½Ã¸àÆ®;³ª³ë¹ÌÅÍ ÇÏÀ̵å·Ï½Ã¾ÆÆÄŸÀÌÆ®;Żȸ ÀúÇ×¼º;°áÇÕ °­µµ
Light-cured glassionomer cement;Nano-sized hydroxyapatite;Demineralization resistance;Bonding strength

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