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Effects of the conditions of microarc oxidation and hydrothermal treatments on the formation of micro-nano hybrid surface on titanium

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ÁÖ°­¿í, ÃÖº´ÇÑ, ¹Ú¿µÁØ, ¼ÛÈ£ÁØ,
¼Ò¼Ó »ó¼¼Á¤º¸
ÁÖ°­¿í ( Joo Kang-Uk ) - Chonnam National University School of Dentistry Department of Dental Materials
ÃÖº´ÇÑ ( Choi Byung-Han ) - Chonnam National University School of Dentistry Department of Dental Materials
¹Ú¿µÁØ ( Park Yeong-Joon ) - Chonnam National University School of Dentistry Department of Dental Materials
¼ÛÈ£ÁØ ( Song Ho-Jun ) - Chonnam National University School of Dentistry Department of Dental Materials

Abstract

¸¶ÀÌÅ©·Î¾ÆÅ© »êÈ­(microarc oxidation; MAO)¿Í ¿­¼öó¸®(hydrothermal treatment) Á¶°ÇÀÇ º¯È­°¡ ƼƼ´½ »óÀÇ ¸¶ÀÌÅ©·Î-³ª³ë ÇÏÀ̺긮µå Ç¥¸é Çü¼º¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ¿¬±¸ÇÏ¿´´Ù. ƼŸ´½ ±Ý¼ÓÀ» Á¤Àü·ù Á¶°Ç¿¡¼­ 30, 60, 120, 180 ¹× 240ÃÊ µ¿¾È °¢°¢ Áõ°¡½ÃÅ°¸é¼­ Ä®½·°ú ÀÎ ÀÌ¿ÂÀ» ÇÔÀ¯ÇÑ ÀüÇØÁúÀ» »ç¿ëÇÏ¿© MAO ó¸®ÇÏ¿´´Ù. MAO ó¸®µÈ ½ÃÆíµéÀº ´Ù½Ã ¾ËÄ«¸® ¼ö¿ë¾×(HT-ó¸®) ¶Ç´Â ÀÎ ÀÌ¿ÂÀ» ÇÔÀ¯ÇÑ ¾ËÄ«¸® ¼ö¿ë¾×(HTP-ó¸®)À» ÀÌ¿ëÇÏ¿© °¢°¢ ¿­¼öó¸® ÇÏ¿´´Ù. ƼŸ´½ »ó¿¡ ´Ù°ø¼º Ç¥¸éÀº 60ÃÊ ÀÌ»ó MAO ó¸®µÈ ÈÄ¿¡ ³ªÅ¸³ª±â ½ÃÀÛÇÏ¿´´Ù. Çü¼ºµÈ »êÈ­¸·¿¡¼­ Ä®½·°ú ÀÎÀÇ Á¶¼ºÀº MAO ó¸® 120ÃÊ ÀÌÈÄ¿¡ ¸íÈ®ÇÏ°Ô ³ªÅ¸³ª±â ½ÃÀÛÇÏ¿© MAO 󸮽ð£ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó ÇÔ²² Áõ°¡ÇÏ¿´´Ù. ¿­¼öó¸® ÈÄ ´Ù°ø¼º Ç¥¸é¿¡ ¸¶ÀÌÅ©·Î Å©±âÀÇ ¼ö»êÈ­ÀÎȸ¼®(hydroxyapatite; HAp) °áÁ¤µé°ú ³ª³ë Å©±âÀÇ TiO2 °áÁ¤µéÀÌ ÇÔ²² Çü¼ºµÇ¾ú´Ù. HTP-ó¸®ÇÑ ½ÃÆí »ó¿¡ Çü¼ºµÈ HAp °áÁ¤ÀÇ Å©±â´Â HT-ó¸®ÇÑ ½ÃÆí¿¡¼­ º¸´Ù ´õ ÄÇÁö¸¸, TiO2 °áÁ¤µéÀÇ Å©±â´Â ´õ ÀÛ¾Ò´Ù. Ç¥¸é °ÅÄ¥±â´Â MAO 󸮽ð£ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó Áõ°¡ÇÏ¿´´Ù. ¿­¼öó¸® ÈÄ 30ÃÊ¿Í 60ÃÊ µ¿¾È MAO ó¸®ÇÑ ½ÃÆíµéÀÇ Ç¥¸é °ÅÄ¥±â´Â °¨¼ÒÇÏ´Â °æÇâÀ» º¸¿© ÁÖ¾úÀ¸³ª, 120ÃÊ ÀÌ»ó MAO ó¸®ÇÑ ½ÃÆí¿¡¼­´Â ´õ ³ôÀº Ç¥¸é °ÅÄ¥±â°¡ ÃøÁ¤µÇ¾ú´Ù. Ä£¼ö¼ºÀº MAO ó¸® ½ÃÆíÀÇ °æ¿ì MAO 󸮽ð£ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó Áõ°¡ÇÏ¿´´Ù. 30ÃÊ¿Í 60ÃÊ µ¿¾È MAO ó¸®ÇÑ ½ÃÆíÀÇ °æ¿ì ¿­¼öó¸® ÈÄ Ä£¼ö¼ºÀÌ °¨¼ÒÇÏ¿´À¸³ª, 120ÃÊ ÀÌ»ó MAO ó¸®ÇÑ ÈÄ ¿­¼öó¸®ÇÏ¿© HAp°¡ Çü¼ºµÈ ½ÃÆíÀÇ °æ¿ì Ä£¼ö¼ºÀÌ ´õ Áõ°¡ÇÏ¿´´Ù.

The effects of the conditions of microarc oxidation (MAO) and hydrothermal treatments on the formation of micro-nano hybrid surface on titanium has been studied. Titanium metals were microarc oxidized using the electrolyte containing Ca and P ions for 30, 60, 120, 180, and 240 s, respectively. These MAO-treated specimens were hydrothermally treated using alkaline solution (HT-treatment) or P-containing alkaline solution (HTP-treatment). The porous morphology was appeared after MAO treatment for more than 60 s. The Ca and P ions in oxide layer were detected clearly after MAO treatment for 120 s, and their contents increased as MAO-treatment time increased. After hydrothermal treatment, micro-sized hydroxyapatite (HAp) and nano-sized TiO2 crystallites were formed on porous surfaces. The size of HAp crystallites formed by HTP-treatment was larger than that formed by HT-treatment, while the size of TiO2 crystallites showed the opposite tendency. Surface roughness of MAO-treated groups increased with MAO-treatment time. After hydrothermal treatment, the roughnesses of the specimens MAO-treated for 30 and 60 s decreased, while the roughness increased after MAO treatment for 120 s. The hydrophilicity of MAO-treated specimens increased with MAO-treatment time. The hydrophilicity of the specimens MAO-treated for 30 and 60 s decreased after hydrothermal treatment. However, the hydrophilicity of the specimens treated with MAO over 120 s and subsequent HT- or HTP- treatments increased with the formation of HAp on their surfaces.

Å°¿öµå

ƼŸ´½;Ç¥¸é°³Áú; ¸¶ÀÌÅ©·Î¾ÆÅ©»êÈ­; ¿­¼öó¸®; ¸¶ÀÌÅ©·Î-³ª³ë ÇÏÀ̺긮µå
Titanium; Surface modification; Microarc oxidation; Hydrothermal treatment; Micro-nano hybrid

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