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Shear bond strength between orthodontic metal brackets and Y-TZP according to the various ceramic surface treatments before and after thermocycling

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ÃÖÁöºÀ ( Choi Ji-Bong ) - Chonbuk National University School of Dentistry Department of Dental Biomaterials
º¯¼±¹Ì ( Byeon Seon-Mi ) - Dental Clinic of Ebarun

Abstract

½É¹ÌÀûÀÎ ÀÌÀ¯·Î ¼ºÀÎÀÇ ±³Á¤Ä¡·á ºñÀ²ÀÌ Áõ°¡Çϸ鼭 Y-TZP ¼öº¹¹°¿¡ ±³Á¤¿ë ºê¶óÄÏÀ» Á÷Á¢ ºÎÂøÇÏ°Ô µÇ¾ú´Ù. ±×·¯³ª, Y-TZPÀÇ ³ôÀº ¾ÈÁ¤¼ºÀ¸·Î ÀÎÇØ °áÇÕ·ÂÀ» À¯ÁöÇϱ⠽±Áö ¾Ê´Ù. ÀÌ·¯ÇÑ ¹®Á¦¸¦ ÇØ°áÇϱâ À§Çؼ­ Y-TZPÀÇ Ç¥¸é󸮹æ¹ý¿¡ °üÇÑ ¸¹Àº ¿¬±¸°¡ ÁøÇàµÇ°í ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â Y-TZP¿Í ±Ý¼Ó ºê¶óÄÏÀÇ °áÇÕ·ÂÀ» Çâ»ó½ÃÅ°´Â µ¥ ÀÖ¾î, ÀÓ»ó¿¡¼­½ÇÁ¦·Î Àû¿ëÇϱ⠰£ÆíÇÑ ¹æ¹ýÀ» ã°í, ħ½ÀÀû ȯ°æÀÎ ±¸°­ ³»¿¡¼­ ³»±¸¼ºÀ» °®´Â Ç¥¸éó¸® ¹æ¹ýÀ» È®ÀÎÇÏ°íÀÚ ÇÏ¿´´Ù. Y-TZP¿¡ Ç¥¸é󸮸¦ ½ÃÇàÇÑ ÈÄ °áÇÕ°­µµ¸¦ ÃøÁ¤ÇÏ¿´°í, Á¢Âø¼º °áÇÕÀ» ¼ºÃëÇϱâ À§ÇÑ ¿äÀεéÀ» ºÐ¼®Çϱâ À§Çؼ­ Ç¥¸éƯ¼ºÀÇ º¯È­¸¦ °üÂûÇÏ¿´´Ù. Y-TZP Ç¥¸é¿¡ 30 ¥ìm Æ®¸®º¸ÄɹÌÄ® ½Ç¸®Ä« ÄÚÆà ÈÄ ½Ç¶õ, MDP ¹× MDP ÇÔÀ¯ ½Ç¶õ ÇÁ¶óÀ̸Ӹ¦Àû¿ëÇÏ¿´´Ù. Ç¥¸é ó¸® ÈÄ ¸ðµç ±ºÀÇ Ç¥¸é °ÅÄ¥±â´Â Áõ°¡ÇÏ¿´À¸¸ç(p<0.05), ½Ç¸®Ä« ÄÚÆà ÈÄ Y-TZP Ç¥¸é¿¡ Si°¡ °í¸£°ÔºÐÆ÷µÇ¾î ÀÖ¾ú´Ù. Æ®¸®º¸ÄɹÌÄ® ÄÚÆà ÈÄ silane ÇÁ¶óÀ̸Ӹ¦ ó¸®ÇÑ ±ºÀÇ Àü´Ü°áÇÕ°­µµ´Â ¿­¼øȯ ó¸® ÈÄ¿¡µµ À¯ÀÇÇÑÂ÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù(p>0.05). Æ®¸®º¸ÄɹÌÄ® ÄÚÆà ÈÄ MDP ÇÁ¶óÀ̸Ӹ¦ ó¸®ÇÑ ±ºÀÇ Àü´Ü°áÇÕ°­µµ´Â ¿­¼øȯ ó¸®ÈÄ¿¡ À¯ÀÇÇÑ Â÷À̸¦ º¸¿´À¸¸ç(p<0.05), Ç¥¸éó¸®ÇÑ ¼¼ ±º Áß¿¡¼­ °¡Àå ³·Àº Àü´Ü°áÇÕ°­µµ °ªÀ» º¸¿´´Ù(p<0.05). Àü´Ü°áÇÕ°­µµ´Â Æ®¸®º¸ÄɹÌÄ® ½Ç¸®Ä« ÄÚÆà ÈÄ MDP ÇÔÀ¯ ½Ç¶õ ÇÁ¶óÀ̸Ӹ¦ Àû¿ëÇÏ¿´À» ¶§ °¡Àå ³ôÀº °ªÀ» º¸¿´°í(p<0.05), ¿­¼øȯó¸®ÈÄ¿¡µµ À¯ÀÇÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù(p>0.05). º» ¿¬±¸¸¦ ÅëÇØ ¾òÀº °á°ú·Î Y-TZP¿¡ Æ®¸®º¸ÄɹÌÄ® ½Ç¸®Ä« ÄÚÆà ÈÄ MDP ÇÔÀ¯ ½Ç¶õ ÇÁ¶óÀ̸Ӹ¦ Àû¿ëÇßÀ» ¶§ ºê¶óÄÏ°úÀÇ°áÇÕ·Â Çâ»ó°ú ÇÔ²² ±¸°­ ³»¿¡¼­µµ ³»±¸¼ºÀ» À¯ÁöÇÒ ¼ö ÀÖ°í, ÀÓ»ó¿¡¼­ Àû¿ëÇϱ⿡µµ °£ÆíÇÑ ¹æ¹ýÀ¸·Î Y-TZPÀÇ Ç¥¸éó¸® ¿¬±¸¿¡ Å©°Ô ±â¿©ÇÒ ¼ö ÀÖÀ» °ÍÀ̶ó ±â´ëµÈ´Ù.

In this study, clinically applicable methods of improving the bond strength between Y-TZP and the bracket were considered, which the method was confirmed for the durability in a humid oral environment. The bond strength of Y-TZP bonding surface and the surface characteristics were analyzed following the surface treatment of Y-TZP specimens with conditioning by 30 ¥ìm tribochemical silica coating, or tribochemical silica coating with one of the following primers: silane, MDP, or an MDP-containing silane primer. It was found that after surface treatment, the surface roughness of all groups increased (p<0.05), and Si was uniformly distributed on the Y-TZP surface after silica coating. The bond strength value of the group treated with silane primer and tribochemical coating was not significantly different after thermocycling (p>0.05). The group treated with MDP primer and tribochemical silica coating showed a significant difference in bond strength values after thermocycling (p<0.05), and it showed the lowest bond strength values except the untreated groups (p<0.05). The group treated with tribochemical silica coating and MDP-containing silane primer showed the highest bond strength values (p<0.05), and was not significantly different after thermocycling (p>0.05). Therefore, the surface treatments of Y-TZP with MDP-containing silane primer after 30 ¥ìm tribochemical silica coating enhanced the bond strength to the orthodontic metal bracket; such a clinically applicable method may advance studies on the surface treatment of Y-TZP.

Å°¿öµå

Y-TZP; Æ®¸®º¸ÄɹÌÄ® ½Ç¸®Ä« ÄÚÆÃ; ÇÁ¶óÀ̸Ó; Àü´Ü°áÇÕ°­µµ; ¿­¼øȯó¸®
Y-TZP; Tribochemical silica coating; Primer; Shear bond strength; Thermocycling

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