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Effect of Various Surface Treatment Methods on Shear Bond Strength of Orthodontic Brackets to Aged Composite Resin

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Abstract

ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº ½ÃÈ¿µÈ º¹ÇÕ·¹Áø ¼öº¹¹°¿¡ ÀÌ»êȭź¼Ò ·¹ÀÌÀú·Î Ç¥¸éó¸®ÇÑ °æ¿ì¿Í ±âÁ¸ÀÇ ¿©·¯ °¡Áö Ç¥¸éó¸® ¹æ¹ý¿¡ µû¸¥ ±³Á¤¿ë ºê¶óÄÏÀÇ Àü´ÜÀÀ·ÂÀ» ÃøÁ¤ÇÏ¿© ºñ±³Çϱâ À§ÇÔÀÌ´Ù. º¹ÇÕ·¹ÁøÀ» ÀÌ¿ëÇÏ¿© Á÷°æ 6 mm, µÎ²² 5 mmÀÇ ½ÃÆíÀ» 96°³ Á¦ÀÛÇÏ¿´´Ù. Á¦ÀÛµÈ ½ÃÆíÀ» ÀΰøŸ¾×¿¡ ħÀû½ÃÄÑ 37¡ÆC ¼ö½Ä À̹ÌÁöÀÇ ¿Âµµ·Î 2ÁÖ µ¿¾È ½Ãȿó¸® ÇÏ¿´´Ù. ±× ÈÄ 96°³ÀÇ ½ÃÆíÀ» ¹«ÀÛÀ§ÀûÀ¸·Î 16°³¾¿ 6°³ÀÇ ±ºÀ¸·Î ³ª´©¾ú´Ù. 1±ºÀº Ç¥¸é󸮸¦ ÇÏÁö ¾Ê¾Ò°í, 2±ºÀº 37% ÀλêÀ¸·Î, 3±ºÀº 4% ºÒ»êÀ¸·Î, 4±ºÀº ÀÔÀÚ ºÐ»ç ¿¬¸¶·Î, 5±ºÀº °í¼Ó ´ÙÀ̾Ƹóµå ¹ö·Î, 6±ºÀº ÀÌ»êȭź¼Ò ·¹ÀÌÀú·Î Ç¥¸éó¸®ÇÏ¿´´Ù. ¸¸´É ½ÃÇè±â¸¦ ÀÌ¿ëÇÏ¿© Àü´ÜÀÀ·ÂÀ» ÃøÁ¤ÇÏ¿´À¸¸ç, ÁÖ»çÀüÀÚ Çö¹Ì°æÀ» ÀÌ¿ëÇÏ¿© Ç¥¸éó¸® ¾ç»óÀ» °üÂûÇÏ¿´´Ù. ¹ö¸¦ »ç¿ëÇÑ 5±ºÀÌ °¡Àå Å« Àü´ÜÀÀ·Â °ªÀ» º¸¿´À¸¸ç, ÀÌ»êȭź¼Ò ·¹ÀÌÀú¸¦ »ç¿ëÇÑ 6±ºÀÌ ±×´ÙÀ½À¸·Î Å« °ªÀ» º¸¿´´Ù. ¹ö¸¦ »ç¿ëÇÑ 5±º°ú ÀÌ»êȭź¼Ò ·¹ÀÌÀú¸¦ »ç¿ëÇÑ 6±ºÀº ³ª¸ÓÁö Ç¥¸éó¸® ¹æ¹ýµéº¸´Ù Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô ³ôÀº Àü´ÜÀÀ·Â °ªÀ» º¸¿©ÁÖ¾ú´Ù(p < 0.05). ¶ÇÇÑ, ÁÖ»çÀüÀÚ Çö¹Ì°æ »çÁøÀ» ÅëÇØ ºÐ¼®ÇÑ °á°ú ·¹ÀÌÀú¸¦ ÀÌ¿ëÇÑ 6±º¿¡¼­ Ç¥¸éÀÌ °¡Àå °ÅÄ¥¾úÀ¸¸ç ºÒ±ÔÄ¢ÇÑ ¿äö±¸Á¶°¡ Çü¼ºµÇ¾ú´Ù. ÀÌ»êȭź¼Ò ·¹ÀÌÀú¸¦ ÀÌ¿ëÇÑ Ç¥¸éó¸® ¹æ¹ýÀº ºê¶óÄÏ Á¢Âø½Ã ÀûÀýÇÑ °áÇÕ°­µµ¸¦ Á¦°øÇϹǷÎ, ½ÃÈ¿µÈ ·¹Áø ¼öº¹¹°¿¡ ±³Á¤¿ë ºê¶óÄÏÀ» Á¢ÂøÇϱâ À§ÇÑ À¯¿ëÇÑ ¹æ¹ýÀÌ µÉ ¼ö ÀÖ´Ù.

The purpose of this study was to investigate the effect of various surface treatment methods on the shear bond strength of orthodontic brackets in vitro. Ninety six specimens, 6 mm in diameter and 5 mm in height, were made with composite resin (Filtek[TM] Z350 XT, 3M ESPE, USA) and treated with an aging procedure. After aging, the specimens were randomly separated in six groups: (1) control with no surface treatment, (2) 37% phosphoric acid gel, (3) 4% hydrofluoric acid gel, (4) sodium bicarbonate particle abrasion, (5) diamond bur, and (6) 1 W carbon dioxide laser for 5s. The metal brackets were bonded to composite surfaces by means of an orthodontic adhesive (Transbond XT, 3M Unitek, USA). Shear bond strength values were evaluated with a universal testing machine (R&B Inc., Korea). Analysis of variance showed a significant difference between the groups. Group 5 had the highest mean shear bond strength (11.9 MPa), followed by group 6 (11.1 MPa). Among the experimental groups, group 2 resulted in the weakest mean shear bond strength (5.22 MPa). The results of this study suggest that the repair shear bond strength of the aged composite resin was acceptable by surface treatment with a carbon dioxide laser.

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ÀÌ»êȭź¼Ò ·¹ÀÌÀú; Ç¥¸éó¸®; Àü´ÜÀÀ·Â; ±³Á¤¿ë ºê¶óÄÏ
Carbon dioxide laser; Surface treatment; Shear bond strength; Orthodontic bracket

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