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Bond strength of orthodontic brackets bonded to enamel with a self-etching primer after bleaching and desensitizer application
Attar Nuray, Korkmaz Yonca, Kilical Yasemin, Saglam-Aydinatay Banu, Bicer Ceren Ozge,
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( Attar Nuray ) - Hacettepe University Faculty of Dentistry Department of Conservative Dentistry
( Korkmaz Yonca ) - Baskent University Faculty of Dentistry Department of Conservative Dentistry
( Kilical Yasemin ) - Columbia University College of Dental Medicine
( Saglam-Aydinatay Banu ) - Hacettepe University Faculty of Dentistry Department of Orthodontics
( Bicer Ceren Ozge ) - Hacettepe University Faculty of Dentistry Department of Conservative Dentistry
KMID : 0361920100400050342
Abstract
º» ¿¬±¸´Â ¹Ì¹é, Å»°¨ÀÛÁ¦ µµÆ÷ ÈÄ, ¼¿ÇÁ ¿¡Äª ÇÁ¶óÀ̸Ӹ¦ ÀÌ¿ëÇÏ¿© ºê¶óÄÏ Á¢Âø ½Ã ¹ý¶ûÁú¿¡ ´ëÇÑ Àü´Ü°áÇÕ°µµ¸¦ ºñ±³Çϱâ À§ÇØ ½ÃÇàµÇ¾ú´Ù. 48°³ÀÇ ¼Ò±¸Ä¡¸¦ ¹«ÀÛÀ§·Î 12°³¾¿ 4°³ÀÇ ±×·ìÀ¸·Î ºÐ·ùÇÏ¿´´Ù. Group 1: 15% hydrogen-peroxide office bleaching agent (Illumine Office-IO), Group 2: IO + BisBlock Oxalate Dentin-Desensitizer, Group 3: Bis-Block Oxalate Dentin-Desensitizer, Group 4: ¾Æ¹«°Íµµ ÇÏÁö ¾ÊÀ½(´ëÁ¶±º). ºê¶óÄÏ Á¢Âø 24½Ã°£ ÈÄ Àü´Ü°áÇÕ°µµ¸¦ ÃøÁ¤ÇÏ¿´À¸¸ç, ¸¸´É½ÃÇè±âÀÇ ¼Óµµ¸¦ 5 mm/min·Î ÇÏ¿© ºê¶óÄÏÀÌ Å»¶ôÇÒ ¶§±îÁö ½ÃÇàÇÏ¿´´Ù. Modified adhesive remnant index¸¦ ÀÌ¿ëÇÏ¿© Å»¶ô ¾ç»óÀ» ºÐ¼®ÇÏ¿´´Ù. ¹Ì¹é¸¸ ½ÃÇà, ¹Ì¹é°ú Å»°¨ÀÛÁ¦ µµÆ÷, Å»°¨ÀÛÁ¦¸¸ µµÆ÷ÇÑ °æ¿ì ¸ðµÎ ºê¶óÄÏÀÇ Àü´Ü°áÇÕ°µµ¸¦ ÇöÀúÈ÷ °¨¼Ò½ÃÄ×À¸¸ç (p = 0.001), ÀÌ ¼¼ ½ÇÇ豺 °£¿¡´Â Åë°èÀûÀ¸·Î À¯ÀǼº ÀÖ´Â Â÷À̸¦ °üÂûÇÒ ¼ö ¾ø¾ú´Ù (Group 1-Group 2, p = 0.564; Group 1-Group 3, p =0.371; Group 2-Group 3, p = 0.133). ¼¼ ½ÇÇ豺¿¡¼ ºê¶óÄÏÀÇ Å»¶ôÀº ÁÖ·Î ¹ý¶ûÁú-Á¢ÂøÁ¦ °è¸é¿¡¼ ¹ß»ýÇÏ¿© ºê¶óÄÏ º£À̽º¿¡ Á¢ÂøÁ¦ÀÇ 100%°¡ ³²¾ÆÀÖ¾ú´Ù. µû¶ó¼ ¹Ì¹é°ú Å»°¨ÀÛÁ¦ µµÆ÷´Â ±³Á¤Ä¡·á ÈÄ¿¡ ½ÃÇàÇÏ´Â °ÍÀÌ ¹Ù¶÷Á÷ÇÏ´Ù.
Objective: The aim of this study was to compare the shear bond strengths (SBS) of orthodontic brackets bonded to enamel with a self-etching primer after bleaching, desensitizer application and combined treatment.
Methods: Forty-eight premolars were randomly divided into four groups, each with n = 12 premolar samples. The four groups were; Group1: 15% hydrogen-peroxide office bleaching agent (Illumine Office-IO), Group 2: IO + BisBlock Oxalate Dentin-Desensitizer, Group 3: Bis Block Oxalate Dentin-Desensitizer, Group 4: No treatment (control). Twenty-four hours after bonding, the specimens were tested in SBS at a crosshead speed of 5 mm/min until the brackets debonded. The failure mode of the brackets was determined by a modified adhesive remnant index.
Results: Bleaching, bleaching and desensitizer treatment, and desensitizer treatment alone all significantly reduced SBS of the orthodontic brackets (p = 0.001). No statistically significant difference was found between Group 1, Group 2 and Group3 (Group 1-Group 2, p = 0.564; Group 1-Group 3, p = 0.371; Group 2-Group 3, p = 0.133). The predominant mode of failure for the treatment groups (Group1, Group 2 and Group 3) was at the enamel-adhesive interface leaving 100% of the adhesive on the bracket base.
Conslusions: Bleaching and desensitizer treatment should be delayed until the completion of orthodontic treatment.
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Bracket; Adhesive; Bonding
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