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THE EFFECT OF CONCENTRATION AND APPLICATION TIME OF HYDROGEN PEROXIDE ON THE MICROTENSILE BOND STRENGTH OF RESIN RESTORATIONS TO THE DENTIN AT DIFFERENT DEPTHS

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¼ÕÁ¤·æ ( Son Jeong-Lyong ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
À̰迵 ( Lee Gye-Young ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
°­À¯¹Ì ( Kang Yu-Mi ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
¿À¿µÅà( Oh Young-Taek ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
À̱¤¿ø ( Lee Kwang-Won ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
±èűՠ( Kim Tae-Gun ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº ½ÉºÎ »ó¾ÆÁú°ú Ä¡¼ö½Ç »ó¾ÆÁú¿¡ H2O2¸¦ °¢±â ´Ù¸¥ Àû¿ë½Ã°£°ú ³óµµ·Î Àû¿ëÇÏ¿´À» ¶§, ·¹Áø¼öº¹¹°°úÀÇ ¹Ì¼¼ÀÎÀå°áÇÕ°­µµ¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Æò°¡ÇÏ´Â °ÍÀÌ´Ù. ÁغñµÈ °¢°¢ÀÇ Ä¡¾Æ¿¡ ÀüÇüÀûÀÎ ±Ù°ü¿Íµ¿À» Çü¼ºÇÏ°í ´ÙÀ½°ú °°ÀÌ ¹«ÀÛÀ§·Î 1°³ÀÇ ´ëÁ¶±º°ú, 4°³ÀÇ ½ÇÇ豺À¸·Î ³ª´©¾ú´Ù: 1 ±º, Àü󸮸¦ ½ÃÇàÇÏÁö ¾Ê¾Ò´Ù; 2 ±º, 20% H2O2¸¦ 20ºÐ, 10ºÐ, 5ºÐ°£ Àû¿ëÇÏ¿´´Ù; 3 ±º, 10% H2O2¸¦ 20ºÐ, 10ºÐ, 5ºÐ°£ Àû¿ëÇÏ¿´´Ù; 4 ±º, 5% H2O2¸¦ 20ºÐ, 10ºÐ, 5ºÐ°£ Àû¿ëÇÏ¿´´Ù; 5 ±º, 2.5% H2O2¸¦ 20ºÐ, 10ºÐ, 5ºÐ°£ Àû¿ëÇÏ¿´´Ù. À§¿Í °°ÀÌ Ã³¸®ÇÑ ÈÄ ¿Íµ¿ ³»¸¦ Superbond C&B(Sunmedical,Co., Shiga, Japan)·Î ÃæÀüÇÏ¿´´Ù. °¢ Ä¡¾Æ´Â 37¡É Áõ·ù¼ö¿¡ 24½Ã°£ ÀúÀåÇÑ µÚ, ½ÉºÎ »ó¾ÆÁú°ú Ä¡¼ö½Ç »ó¾ÆÁú·Î À߶ó ¹Ì¼¼ÀÎÀå°áÇÕ°­µµ ½ÃÇèÀ» ½ÃÇàÇÏ¿´´Ù. °¢ ±º¿¡¼­ ÃøÁ¤µÈ ¹Ì¼¼ÀÎÀå°áÇÕ°­µµ¸¦ 3-way ANOVA¿Í Tukey post hoc test·Î Åë°è ó¸®ÇÏ¿´´Ù(p < 0.05). ½ÇÇè °á°ú ¸ðµç ±º¿¡¼­ ½ÉºÎ »ó¾ÆÁú(D1)ÀÇ ¹Ì¼¼ÀÎÀå °áÇÕ°­µµ°¡ Ä¡¼ö½Ç »ó¾ÆÁú(D2)º¸´Ù ³ô°Ô ³ªÅ¸³µ´Ù. Æò±Õ °áÇÕ°­µµ´Â H2O2ÀÇ ³óµµ¿Í Àû¿ë ½Ã°£ÀÌ Áõ°¡ÇÒ¼ö·Ï °¨¼ÒÇÏ¿´´Ù. Åë°èºÐ¼®¿¡¼­ »ó¾ÆÁúÀÇ ±íÀÌ, H2O2 ³óµµ¿Í Àû¿ë ½Ã°£À̶ó´Â ¼¼ °¡Áö º¯¼ö°£ÀÇ ±³È£ÀÛ¿ë È¿°ú´Â ¾øÀ¸³ª(p > 0.05), »ó¾ÆÁúÀÇ ±íÀÌ¿Í H2O2 ³óµµ »çÀÌ, H2O2 ³óµµ¿Í Àû¿ë ½Ã°£ »çÀÌ¿¡¼­´Â ±³È£ÀÛ¿ë È¿°ú°¡ ÀÖ¾ú´Ù(p < 0.05). SEM °üÂû¿¡¼­´Â H2O2ÀÇ ³óµµ°¡ Áõ°¡ÇÒ¼ö·Ï »ó¾Æ¼¼°üÀÌ Á» ´õ °³¹æµÈ ¾ç»óÀ» º¸¿´´Ù.

The purpose of this study was to examine the effect of hydrogen peroxide at different application time and concentrations on the microtensile bond strength of resin restorations to the deep and the pulp chamber dentin. A conventional endodontic access cavity was prepared in each tooth, and then the teeth were randomly divided into 1 control group and 4 experimental groups as follows: Group 1, non treated; Group 2, with 20% Hydrogen peroxide(H2O2); Group 3, with 10% H2O2; Group 4, with 5% H2O2; Group 5, with 2.5% H2O2; the teeth of all groups except group 1 were treated for 20, 10, and 5min. The treated teeth were filled using a Superbond C&B (Sun medical Co., Shiga, Japan). Thereafter, the specimens were stored in distilled water at 37¡É for 24-hours and then sectioned into the deep and the chamber dentin. The microtensile bond strength values of each group were analyzed by 3-way ANOVA and Tukey post hoc test(p < 0.05). In this study, the microtensile bond strength of the deep dentin (D1) was significantly greater than that of the pulp chamber dentin (D2) in the all groups tested. The average of microtensile bond strength was decreased as the concentration and the application time of H2O2 were increased. Analysis showed significant correlation effect not only between the depth of the dentin and the concentration of H2O2 but also between the concentration of H2O2 and the application time(p < 0.05), while no significant difference existed among these three variables(p > 0.05). The higher H2O2 concentration, the more opened dentinal tubules under a scanning electron microscope(SEM) examination.

Å°¿öµå

Hydrogen peroxide;¹Ì¼¼ÀÎÀå°áÇÕ°­µµ;±íÀº »ó¾ÆÁú;Ä¡¼ö½Ç »ó¾ÆÁú;»êÈ­ È¿°ú;Free radical mechanism;Superbond C&B
Hydrogen peroxide;Microtensile bond strength;Deep dentin;Pulp chamber dentin;Oxidizing action;Free radical mechanism;Superbond C&B

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