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´Ü°áÁ¤Çü ¼¼¶ó¹Í ºê¶óÄÏÀÇ ÀçÁ¢Âø ½Ã tribochemical silica coatingÀÌ Àü´ÜÁ¢Âø°­µµ¿¡ ¹ÌÄ¡´Â ¿µÇâ

Effect of tribochemical silica coating on the shear bond strength of rebonded monocrystalline ceramic brackets

Korean Journal of Orthodontics 2010³â 40±Ç 3È£ p.184 ~ 194
Àü¿µ¹Ì, ¼Õ¿ì¼º, °­»ó¿í,
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Àü¿µ¹Ì ( Jeon Young-Mi ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ±³Á¤Çб³½Ç
¼Õ¿ì¼º ( Son Woo-Sung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°ú±³Á¤Çб³½Ç
°­»ó¿í ( Kang Sang-Wook ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°ú±³Á¤Çб³½Ç

Abstract

º» ¿¬±¸´Â Å»¶ôµÈ ¼¼¶ó¹Í ºê¶óÄÏÀ» tribochemical silica coatingÇÏ°í nano-filled flowable composite resin (Transbond Supreme LV, 3M Unitek, Monrovia, Calif, USA)À» ÀÌ¿ëÇÏ¿© ÀçÁ¢ÂøÇÏ¿´À» ¶§ ±³Á¤Ä¡·á¿¡ ÃæºÐÇÑ Á¢Âø°­µµ¸¦ ¾òÀ» ¼ö ÀÖ´ÂÁö Æò°¡Çϱâ À§ÇØ ½ÃÇàÇÏ¿´´Ù. ÃÑ 60°³ÀÇ ¼Ò±¸Ä¡¸¦ ÁغñÇÏ¿© ´ÙÀ½ÀÇ 4°³ ±ºÀ¸·Î ³ª´©¾ú´Ù:Tribochemical silica coating (TC) + Transbond Supreme LV (LV), TC + Transbond XT (XT), Sandblast treatment(SA) + LV, SA + XT. Àçó¸®µÈ ¼¼¶ó¹Í ºê¶óÄÏÀº °¢°¢ÀÇ Á¢ÂøÁ¦¸¦ ÀÌ¿ëÇÏ¿© Ä¡¾Æ¿¡ ºÎÂøÇÏ¿´´Ù. ½ÃÆíµéÀ» »ó¿ÂÀÇ »ý¸®½Ä¿°¼ö¿¡ 1ÁÖÀÏ°£ º¸°üÇÑ µÚ ¿­¼øȯÀ» ½ÃÄ×´Ù. ¸¸´É½ÃÇè±â·Î Àü´ÜÁ¢Âø°­µµ¸¦ ÃøÁ¤ÇÑ µÚ ÆÄÀý¾ç»óÀ» Æò°¡ÇÏ¿´´Ù. TC±ºÀº ÀÓ»óÀûÀ¸·Î ÃæºÐÇÑ °­µµ¸¦ º¸¿´´Ù(TCLV: 10.82 ¡¾ 1.82 MPa, TCXT: 11.50 ¡¾ 1.72 MPa). ÇÏÁö¸¸ SA±ºÀºTC±º¿¡ ºñÇÏ¿© À¯ÀÇÇÏ°Ô ³·Àº Àü´ÜÁ¢Âø°­µµ¸¦ º¸¿´´Ù(SALV: 1.23 ¡¾ 1.16 MPa, SAXT: 1.76 ¡¾ 1.39 MPa, p £¼0.05). LV±º°ú XT±ºÀÇ Àü´ÜÁ¢Âø°­µµ´Â À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù. TCLV, TCXT±º ¸ðµÎ ½ÃÆíÀÇ 77%°¡ Á¢ÂøÁ¦¿¡¼­ÀÇ ÆÄÀýÀ» º¸¿´°í, °¢ ±º´ç 1°³¾¿ÀÇ ½ÃÆí¿¡¼­ ¹ý¶ûÁú ÆÄÀýÀÌ °üÂûµÇ¾ú´Ù. SA±ºÀº ¸ðµç ÆÄÀýÀÌ ºê¶óÄÏ°ú Á¢ÂøÁ¦ °è¸é¿¡¼­ ¹ß»ýÇÏ¿´´Ù. LV±º°ú XT±ºÀÇ Å»¶ô¾ç»ó¿¡´Â À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù. ÀÌ»óÀÇ ¿¬±¸ °á°ú¿¡¼­ º¸¸é nano-filled flowable composite resin°ú tribochemical silica coating 󸮸¦ ÀÌ¿ëÇÏ¿© ¼¼¶ó¹Í ºê¶óÄÏÀ» ÀçÁ¢ÂøÇϸé ÃæºÐÇÑ Àü´ÜÁ¢Âø°­µµ¸¦ ¾òÀ» ¼ö ÀÖ´Ù. ´Ü ¹ý¶ûÁú ÆÄÀýÀÇ °¡´É¼ºÀÌ ÀÖÀ¸¹Ç·Î Å»Á¢Âø ½Ã ÀûÀýÇÑ ±â±¸¿Í ±â¼úÀ» ÀÌ¿ëÇØ ÁÖÀDZí°Ô ºê¶óÄÏÀ» Á¦°ÅÇØ¾ß ÇÑ´Ù.

Objective: The purpose of this study was to investigate the effect of tribochemical silica coating on the shear
bond strength (SBS) of rebonded ceramic brackets using nano-filled flowable composite resin.

Methods: A total of 60 premolars were prepared and divided into 4 equal groups as follows: Tribochemical silica coating (TC) + Transbond XT (XT), TC + Transbond supreme LV (LV), Sandblast treatment (SA) + XT, SA + LV. Treated ceramic brackets were rebonded on the premolars using each adhesive. All samples were tested in shear mode on a universal testing machine.

Results: SBS of silica coated groups were high enough for clinical usage (TCLV: 10.82 ¡¾ 1.82 MPa, TCXT: 11.50 ¡¾ 1.72 MPa). But, SBS of the sandblast treated groups had significantly lower values than the tribochemical silica coated groups (SALV, 1.23 ¡¾ 1.16 MPa; SAXT, 1.76 ¡¾ 1.39 MPa; p £¼ 0.05). There was no difference between the shear bond strength by type of adhesive. In the silica coated groups, 77% of the samples showed bonding failure in the adhesive. In the sandblast treated group, all bonding failures occurred at the bracket-adhesive interface.

Conclusions: The result of this study suggest that newly introduced nano-filled flowable composite resin and tribochemical silica coating application on debonded ceramic bracket bases can produce appropriate bond strengths for orthodontic bonding.

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Tribochemical silica coating;Ceramic bracket;Shear bond strength

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