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A STUDY OF ADDITIONAL VIBRATION EFFECT ON DENTIN BOND STRENGTH

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Abstract

ÃÊÀ½ÆÄ Áøµ¿À» Ä¡ÀÇÇп¡ óÀ½ ÀÌ¿ëÇÑ °ÍÀº Ä¡¼® Á¦°Å±â¿´À¸³ª, ÃÖ±Ù¿¡´Â ÁÖÁ¶±Ý¼Ó°ú ·¹Áø Àη¹À̸¦ Á¢ÂøÇÒ ¶§, Àλê¾Æ¿¬½Ã¸àÆ®³ª ·¹Áø½Ã¸àÆ®ÀÇ Á¡µµ¸¦ ³·Ãߴµ¥ ÀÌ¿ëµÇ°í ÀÖ´Ù. ÀÌ·¯ÇÑ ÃÊÀ½ÆÄ Áøµ¿Àº Àç·áÀÇ È帧¼ºÀ» Áõ°¡½ÃÅ´À¸·Î½á ÇǸ·µµ¸¦ ³·Ãß°í, µû¶ó¼­ ¼öº¹¹° ÁÖÀ§ÀÇ ¹Ì¼¼´©ÃâÀ» °¨¼Ò½Ãų ¼ö ÀÖ´Â ÀåÁ¡ÀÌ ÀÖ´Ù. ±×·¯³ª, º¹ÇÕ·¹ÁøÀÇ ¼öº¹¿¡ À־ ÀÌ·¯ÇÑ ÃÊÀ½ÆÄ Áøµ¿ÀÇ ÀÓ»óÀû È¿°ú¿¡ °üÇÑ ¿¬±¸°¡ ¾ÆÁ÷±îÁö ¹ÌÈíÇÑ ½ÇÁ¤ÀÌ´Ù. ÀÌ¿¡ ÀúÀÚ´Â ÃÊÀ½ÆÄ Áøµ¿À» »ó¾ÆÁú °áÇÕÁ¦¿¡ Àû¿ëÇÏ¿© Á¡µµ¸¦ °¨¼Ò½ÃÅ´À¸·Î½á »ó¾Æ¼¼°üÀ¸·ÎÀÇ ·¹Áø ħÅõ Á¤µµÀÇ º¯È­¿Í °áÇշ¿¡ ¹ÌÄ¡´Â È¿°ú¸¦ ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù.
¹ß°Å ÈÄ ½Ç¿ÂÀÇ 0,1% thymol¿ë¾×¿¡ º¸°üµÈ 88°³ÀÇ °ÇÀüÇÑ »ç¶÷ÀÇ ´ë±¸Ä¡¸¦ Ä¡°üºÎ ¹ý¶ûÁúÀ» Á¦°ÅÇÏ°í ¾ÆÅ©¸± ·¹ÁøÀ» ÀÌ¿ëÇÏ¿© Á÷°æ 1-inchÀÇ PVC °ü¿¡ ¸Å¸ôÇÏ¿´´Ù. °¢ ½ÃÆíÀÇ ±³ÇÕ¸éÀÌ ¾ÆÅ©¸±ºÀ°ú µ¿ÀÏÇÑ ³ôÀÌ°¡ µÇµµ·Ï 220-500-gritÀÇ ¿¬¸¶Áö·Î ¼øÂ÷ÀûÀ¸·Î ¿¬¸¶ÇÏ¿´°í, ¹«ÀÛÀ§·Î ÃßÃâÇÏ¿© °¢ ±º´ç 22°³¾¿ ³× ±ºÀ¸·Î ºÐ·ùÇÏ¿´´Ù. 1±º°ú 2±ºÀº Single Bond(3M-ESPE, St. Paul, USA)¸¦ 3±º°ú 4±ºÀº One-Step(Bisco Inc., Schaumburg, USA)À» Á¦Á¶»çÀÇ Áö½Ã¿¡ µû¶ó Ä¡¸éÀ» »êºÎ½Ä, ¼ö¼¼, °ÇÁ¶ÇÑ ÈÄ ¿¬¼ÓÇÏ¿© 2¹øÀ» µµÆ÷ÇÏ¿´´Ù. 2±º°ú 4±ºÀº ÃÊÀ½ÆÄ Ä¡¼®Á¦°Å±â¸¦ ÀÌ¿ëÇÏ¿© Ä¡¸é¿¡ ´ë°í 10 ÃÊ°£ Áøµ¿À» °¡ÇÑ ÈÄ ±¤ÁßÇÕÇÏ¿´´Ù. ÀÌÈÄ Á÷°æ 2.3mm, ³ôÀÌ 3.5mmÀÇ Teflon mold (Ultradent Products Inc., South Jordan. USA)¸¦ ÀÌ¿ëÇÏ¿© º¹ÇÕ·¹ÁøÀ» ÃæÀüÇÑ ÈÄ 40Ãʾ¿ µÎ ¹ø¿¡ ³ª´©¾î ±¤ÁßÇÕÇÏ¿´´Ù. ¸ðµç ½ÃÆíÀº 24½Ã°£ µ¿¾È ½Ç¿ÂÀÇ ¼öµµ¹°¿¡ º¸°üÇÑ ÈÄ ¿­¼øȯÀ» ½ÃÇàÇÏ°í, ¸¸´ÉÃøÁ¤±â(Instron 4465, Canton. USA)·Î Àü´Ü°áÇÕ°­µµ¸¦ ÃøÁ¤ÇÏ¿´À¸¸ç resin tagÀÇ ¾ç»óÀ» ºñ±³Çϱâ À§ÇØ °¢ ±ºÀÇ ½ÃÆíÀÇ Ä¡ÁúÀ» Żȸ½ÃŲ ÈÄ¿¡ Ç¥¸éÀ» ÁÖ»çÀüÀÚÇö¹Ì°æÀ¸·Î °üÂûÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ÃÊÀ½ÆÄ Áøµ¿À» °¡ÇÏÁö ¾ÊÀº 1±º, 3±º¿¡ ºñÇØ ÃÊÀ½ÆÄ Áøµ¿À» °¡ÇÑ 2±º°ú 4±º¿¡¼­ Àü´Ü°áÇÕ°­µµ°¡ À¯ÀÇÇÏ°Ô ³ô°Ô ³ªÅ¸³µ´Ù(p<0.05).
2. Single Bond¿Í One-StepÀÇ Àü´Ü°áÇÕ°­µµ´Â À¯ÀÇÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù(p>0.05).
3. ÀüÀÚÇö¹Ì°æ °üÂû¿¡¼­ ÃÊÀ½ÆÄ Áøµ¿À» °¡ÇÑ ±º¿¡¼­ resin tagÀÇ ±æÀÌ°¡ ±æ¾ú°í, lateral branchÀÇ ¼öµµ ¸¹ÀÌ °üÂûµÇ¾ú´Ù.
The objective of the study was to apply the vibration technique to reduce the viscosity of bonding adhesives and thereby compare the bond strength and resin penetration into dentinal tubules achieved with those gained using the conventional technique.
Eighty-eight noncarious extracted human permanent molar teeth were sectioned to remove the coronal enamel and were embedded in 1-inch PVC pipe with acrylic resin. The occlusal surfaces were placed so that the tooth and the embedding medium were at the same level to form one flat surface, and the samples were subsequently polished with silicon carbide abrasive papers. The samples were randomly assigned to 4 groups(n=22). On Group 1 and 2. Single Bond(3M-ESPE, St. Paul, USA) was used, and on Group 3 and 4, One-Step(Bisco Inc., Schaumburg, USA) was used, and each was applied according to its manufacturer¢¥s instructions. For Group 2 and Group 4, vibration was applied with ultrasonic scaler for 10 seconds, and the adhesive was light-cured for 10 seconds. Resin composite was condensed on to the prepared surface in two increments using a mold kit(Ultradent Products Inc., USA) and each was lightcured for 40 seconds. After 24 hours in tap water at room temperature the specimens were thermocycled,¢¥ and shear bond strengths were measured with a universal testing machine(Instron 4465, Canton, USA). To investigate infiltration patterns of the adhesive materials, the surface of specimen was examined with scanning electron microscope. The results were as follows.
1. The shear bond strengths of vibration groups(Group 2. Group 4) were significantly greater than those of the non-vibration groups(Group 1, Group 3)(p(O.05).
2. The shear bond strengths of Single Bond and One-Step were not significantly different (p >0 - 05).
3. The vibration groups showed greater number of resin tags in tubules and lateral branches under SEM.

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Ultrasonic vibration;Bonding Adhesives;Viscosity;Shear bond strength;Resin infiltration;ÃÊÀ½ÆÄ Áøµ¿;»ó¾ÆÁú °áÇÕÁ¦;Á¡µµ;Àü´Ü°áÇÕ°­µµ;·¹Áø ħÅõ

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