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COMPARATIVE STUDY OF PHYSICAL PROPERTIES FOR VARIOUS BAND CEMENTS

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¾ç±ÔÈ£ ( Yang Kyu-Ho ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
±è±â¹é ( Kim Ki-Beak ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
±è¼±¹Ì ( Kim Seon-Mi ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
ÃÖ³²±â ( Choi Nam-Ki ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº ½ÃÁß¿¡ À¯ÅëµÇ°í ÀÖ´Â ¹êµå ½Ã¸àÆ®µéÀ» Á¾·ùº°·Î ÀÌ¿ëÇÏ¿© ±³Á¤¿ë ¹êµåÀÇ °áÇÕ°­µµ¸¦ ºñ±³ÇÏ°í, °¢ ½Ã¸à Æ®ÀÇ ÆÄÀý ¾ç»óÀ» ºñ±³ÇÏ¿© ±³Á¤¿ë ¹êµå¿¡ ´ëÇÑ »ç¿ëÁöħÀ» ¸¶·ÃÇϴµ¥ µµ¿òÀÌ µÇ°íÀÚ ÇÏ¿´´Ù. 100°³ÀÇ ¹ß°ÅµÈ Àΰ£ÀÇ Á¦ 3´ë±¸Ä¡¸¦ ÀÌ¿ëÇØ ½ÇÇ豺Àº ÃÑ 5°³ÀÇ ±ºÀ¸·Î ÇÏ¿´À¸¸ç, °¢ ±º´ç ½ÃÆí¼ö°¡ 20°³°¡ µÇµµ·Ï ÀÓÀÇ ÀûÀ¸·Î ºÐ·ùÇÏ¿´´Ù. ½ÇÇè¿¡ »ç¿ëÇÑ ¹êµå ½Ã¸àÆ®´Â ´ÙÀ½°ú °°´Ù; Ormco gold, Ultra Band-LokTM, Fuji OrthoTM LC, 3M UnitekTM Multi-Cure Glass Ionomer, Ketac-CemTM. Universal testing machine(Instron Corp., Canton, MA, USA) ¸¦ »ç¿ëÇÏ¿© ÃÖ´ëÇÏÁß°ªÀ» ÃøÁ¤ÇÏ¿´°í, Àü´Ü°áÇÕ°­µµ °ªÀ» °è»êÇÏ¿´´Ù. ¹êµå°¡ Å»¶ôÇÑ ÈÄ, Å»¶ô ºÎÀ§¸¦ Æò°¡ÇÏ¿© ¹ý¶ûÁú°ú ½Ã ¸àÆ®, ½Ã¸àÆ®¿Í ¹êµå »çÀÌ·Î ±¸ºÐÇÏ¿´´Ù. ¹êµåÀÇ Àü´Ü°­µµ´Â One-way ANOVA¸¦ ÀÌ¿ëÇÏ¿© Åë°èó¸® ÇÏ¿´À¸¸ç Tukey test ¸¦ ÀÌ¿ëÇÏ¿© °ËÁ¤ÇÏ¿´´Ù. ¶ÇÇÑ Å»¶ô ºÎÀ§´Â Chi-squre analysis¸¦ ÀÌ¿ëÇÏ¿© Åë°è ó¸®ÇÏ¿´°í, Fisher¡¯s exact test·Î ±º°£ À¯ÀǼºÀ» °ËÁ¤ÇÏ¿´´Ù. ½ÇÇè °á°ú Æò±Õ ÆÄÀý °­µµ´Â Ormco±ºÀÌ °¡Àå ³ô¾Ò°í(2.44¡¾0.57), Fuji OrthoTM±º(2.24¡¾0.50), Ketac-CemTM±º(2.10 ¡¾0.57), 3M UnitekTM±º(1.82¡¾0.43), Band-LokTM±º(1.73¡¾0.28) ¼øÀ̾úÀ¸¸ç, Ormco±ºÀº Band-LokTM±º°ú 3M UnitekTM±º, Fuji OrthoTM±ºÀº Band-LokTM±º°ú¸¸ Åë°èÀûÀ¸·Î À¯ÀÇÇÒ¸¸ÇÑ Â÷À̸¦ º¸¿´´Ù(p<0.05). ÆÄÀý ¾ç»ó¿¡¼­ Ormco ±º°ú Band-LokTM±ºÀº ¼­·Î»Ó¸¸ ¾Æ´Ï¶ó ´Ù¸¥ ±º°ú À¯ÀÇÇÒ¸¸ÇÑ Â÷À̸¦ º¸¿´À¸¸ç, Fuji OrthoTM, 3M UnitekTM, Ketac- CemTM ±º °£¿¡´Â À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù.

The aim of this study was to compare the shear-peel strength and the fracture site of 5 commercially available orthodontic band cements. One hundred molar bands were cemented to extracted human 3rd molars. The specimens were prepared in accordance with the manufacturer¡¯s instructions for each cement. After storage in a humidor at 37¡É for 24 hours, the shear debonding force was assessed for each specimen using an universal testing machine with crosshead speed of 2 mm/minute. Maximal failure stress was converted to mean shearpeel strength, MPa. The predominant site of band failure was recorded visually for all specimens as either at the band/cement or cement/enamel interface. Mean shear-peel strength of Ormco was the highest(2.44¡¾0.57), followed by Fuji OrthoTM(2.24¡¾0.50), Ketac-CemTM(2.10¡¾0.57), 3M UnitekTM(1.82¡¾0.43), Band-LokTM(1.73¡¾0.28). There were statistically significant differences between Ormco and Band-LokTM, Ormco and 3M UnitekTM, and Fuji OrthoTM and Band- LokTM(p<0.05). The predominant site of bonding failure for bands cemented with the Ormco was at the band/cement interface, whereas bands cemented with Ultra Band-LokTM failed predominantly at the enamel/cement interface. There was no significant difference among the other cements(Fuji OrthoTM, 3M UnitekTM, Ketac-CemTM).

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Orthodontic band;Cement;Shear-peel bond strength;Failure site

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