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The effect of using laser for ceramic bracket bonding of porcelain surfaces

Korean Journal of Orthodontics 2008³â 38±Ç 4È£ p.275 ~ 282
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¾È°æ¹Ì ( An Kyung-Mi ) - ´ë±¸°¡Å縯´ëÇб³º´¿ø Ä¡°ú±³Á¤°ú
¼Õµ¿¼® ( Sohn Dong-Seok ) - ´ë±¸°¡Å縯´ëÇб³º´¿ø Ä¡°ú ±¸°­¾Ç¾È¸é¿Ü°úÇб³½Ç

Abstract

º» ¿¬±¸´Â Æ÷¼¼¸° Ç¥¸é¿¡ CO2 ·¹ÀÌÀú¸¦ Á¶»çÇÏ¿© ¼¼¶ó¹Í ºê¶óÄÏÀ» ºÎÂø ÈÄ Àü´Ü°áÇÕ°­µµ¸¦ ÃøÁ¤ÇÏ°í, »êºÎ½Äó¸® ¹× »÷µåºí¶ó½ºÆ® µîÀÇ ÀϹÝÀûÀÎ ¹æ¹ýÀ» ½ÃÇàÇÏ¿© ±× °á°ú¸¦ ºñ±³ ºÐ¼®ÇÏ¿© ·¹ÀÌÀú Ç¥¸éó¸®ÀÇ È¿°ú¸¦ ¿¬±¸ÇÏ°íÀÚ ½ÃÇàµÇ¾ú´Ù. 90°³ÀÇ Æ÷¼¼¸°(8 ¡¿ 8 ¡¿ 4 mm) ½ÃÆíÀ» Á¦ÀÛÇÏ¿© °¢°¢ 10°³¾¿ 9°³±ºÀ¸·Î ³ª´©¾ú´Ù. ´ëÁ¶±º(C)À¸·Î ¾Æ¹«·± Ç¥¸é󸮸¦ ÇÏÁö ¾ÊÀº ±Û·¹ÀÌÁî Ç¥¸éÀ» »ç¿ëÇÏ¿´À¸¸ç, ½ÇÇ豺Àº Àλê 󸮱º(OFA), Àλê°ú silane 󸮱º(OFA + S), »÷µåºí¶ó½ºÆà 󸮱º(SB), »÷µåºí¶ó½ºÆðú silane 󸮱º(SB + S), ·¹ÀÌÀú 󸮱º(L), ·¹ÀÌÀú¿Í silane 󸮱º(L + S), ºÒ»ê 󸮱º(HFA), ºÒ»ê°ú silane 󸮱º(HFA + S)À¸·Î ºÐ·ùÇÏ¿´´Ù. ¸¸´É½ÃÇè±â¸¦ ÀÌ¿ëÇÏ¿© Àü´Ü°áÇÕ°­µµ¸¦ ÃøÁ¤ÇÏ°í ±× ÆÄÀý¾ç»óÀ» ºñ±³ ºÐ¼®ÇÑ °á°ú ºÒ»ê°ú silaneÀ» µ¿½Ã¿¡ ó¸®ÇÑ ±º¿¡¼­ °¡Àå ³ôÀº °ª(13.92 ¡¾ 1.92 MPa)À» º¸¿´À¸¸ç, ÃøÁ¤°ªÀº SB + S (10.16 ¡¾ 1.27 MPa), HFA (10.09 ¡¾ 1.07 MPa), L + S (8.25 ¡¾ 1.24 MPa), L (7.86 ¡¾ 0.96 MPa), OFA + S (7.22 ¡¾ 1.09 MPa), SB (3.41 ¡¾ 0.37 MPa), OFA (2.81 ¡¾ 0.37 MPa), ´ëÁ¶±º(2.46 ¡¾ 1.36 MPa) ¼øÀ̾ú´Ù. ºê¶óÄÏ ºÎÂø ½Ã Ä¡°ú¿ë ·¹ÀÌÀú¸¦ ÀÌ¿ëÇÑ Æ÷¼¼¸°ÀÇ Ç¥¸éó¸® °á°ú Àü´Ü°áÇÕ°­µµÀÇ °ªÀº ÀÓ»óÀûÀ¸·Î ¹Þ¾Æµé¿©Áú ¸¸ÇÑ ¼öÄ¡¸¦ º¸¿´À¸¸ç ·¹ÀÌÀú¿Í silaneÀ» µ¿½Ã¿¡ ó¸®ÇÑ ±º°ú´Â Åë°èÀûÀ¸·Î À¯ÀÇÇÒ ¸¸ÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù(p £¾ 0.05). ÀÌ»óÀÇ ¿¬±¸°á°ú´Â Æ÷¼¼¸° Ç¥¸é¿¡ ¼¼¶ó¹Í ºê¶óÄÏ ºÎÂø ½Ã 2-wattÀÇ CO2 ·¹ÀÌÀú¸¦ »ç¿ëÇÏ¿© Àü󸮸¦ ÇÏ´Â ¹æ¹ýÀº ½Ã°£Àý¾àÀÇ °üÁ¡¿¡¼­ ÀÓ»óÀûÀ¸·Î Ç¥¸é Àüó¸®ÀÇ ÀûÀýÇÑ Ä¡·á ´ë¾ÈÀÌ µÉ ¼ö ÀÖÀ½À» º¸¿©ÁÖ¾ú´Ù. (´ëÄ¡±³Á¤Áö 2008;38(4):275-282)

Objective: The purpose of this study was to investigate the effect of using laser for ceramic bracket bonding of porcelain surfaces and to compare it with conventional treatment of porcelain surfaces.

Methods: Ninety feldspathic porcelain specimens were divided into 9 groups of 10, with each group having different surface treatments performed. Surface treatment groups were orthophosphoric acid, orthophosphoric acid with silane, hydrofluoric acid, hydrofluoric acid with silane, sandblasted, sandblasted with silane, laser etched, laser etched with silane, and glazed surface served as a control group. In the laser etched groups, the specimens were irradiated with 2-watt superpulse carbon dioxide (CO2) laser for 20 seconds. Ceramic brackets were bonded with light-cure composite resin and all specimens were stored in water at 37oC for 24 hours. Shear bond strength was determined in megapascals (MPa) by shear test at 1 mm/minute crosshead speed and the failure pattern was assessed. For statistical analysis, one-way ANOVA and tukey test were used.

Results: Statistical analysis showed significant differences between the groups. The HFA + S group showed the highest mean shear bond strength (13.92 ¡¾ 1.94 MPa). This was followed by SB + S (10.16 ¡¾ 1.27 MPa), HFA (10.09 ¡¾ 1.07 MPa), L + S (8.25 ¡¾ 1.24 MPa), L (7.86 ¡¾ 0.96 MPa), OFS + S (7.22 ¡¾ 1.09 MPa), SB (3.41 ¡¾ 0.37 MPa), OFA (2.81
¡¾ 0.37 M Pa), G (2,46 ¡¾ 1.36 MPa). Bond failure patterns of HFA and silane groups, except L + S, were cohesive modes in porcelain while adhesive failure was observed in the control group and the rest of the groups.

Conclusions: A 2-watt superpulse CO2 laser etching of porcelain surfaces can provide a satisfactory result for porcelain surface treatment for ceramic bracket bonding. Laser irradiation may be an alternative conditioning method for the treatment of porcelain surfaces. (Korean J Orthod 2008;38(4):275-282)

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CO2 ·¹ÀÌÀú;Æ÷¼¼¸°;Ç¥¸éó¸®;Àü´Ü°áÇÕ°­µµ
CO2laser;Porcelain;Surfacetreatment;Shearbondstrength

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