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Evaluation of Shear Bond Strength and Microleakage of Bulk-fill Resin Composites

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ÀÌÇѺ°:Lee Han-Byeol ¼­Çö¿ì:Seo Hyun-Woo/ÀÌÁÖÇö:Lee Ju-Hyun/¹ÚÈ£¿ø:Park Ho-Won

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº bulk-fill º¹ÇÕ·¹ÁøÀÇ »ó¾ÆÁú Àü´Ü°áÇÕ°­µµ ¹× ¹Ì¼¼´©ÃâÀ» Æò°¡ÇÔ¿¡ ÀÖ´Ù.
½ÇÇ豺À¸·Î 1Á¾ÀÇ °íÁ¡µµ bulk-fill º¹ÇÕ·¹Áø°ú 2Á¾ÀÇ ÀúÁ¡µµ bulk-fill º¹ÇÕ·¹ÁøÀ» »ç¿ëÇÏ¿´°í ´ëÁ¶±ºÀ¸·Î 1Á¾ÀÇ conventional º¹ÇÕ·¹ÁøÀ» »ç¿ëÇÏ¿´´Ù. »ó¾ÆÁú Á¢ÂøÁ¦´Â 7¼¼´ë¸¦ »ç¿ëÇÏ¿´´Ù.
¿µ±¸Ä¡¸¦ 4±ºÀ¸·Î ³ª´« ÈÄ Àü´Ü°áÇÕ°­µµ ÃøÁ¤À» À§ÇØ ·¹Áøºí·ÏÀ» ½ÇÇ豺Àº 4 mm, ´ëÁ¶±ºÀº 2 mm µÎ²²·Î ÃàÁ¶ÇÏ¿´°í, ¹Ì¼¼´©ÃâÀ» Æò°¡¸¦ À§ÇØ ½ÇÇ豺Àº 4 mm ´ÜÀÏÃþ ÃæÀü, ´ëÁ¶±ºÀº 2 mm¾¿ 2ȸ ÀûÃþÃæÀüÀ» ½ÃÇàÇÏ¿´´Ù.
Àü´Ü°áÇÕ°­µµ¿Í °ü·ÃÇÏ¿© ´ëÁ¶±º°ú ºñ±³ÇÏ¿´À» ¶§ ÀúÁ¡µµ bulk-fill º¹ÇÕ·¹Áø¿¡¼­´Â Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ Á¸ÀçÇÏÁö ¾Ê¾ÒÀ¸³ª, °íÁ¡µµ bulk-fill º¹ÇÕ·¹Áø¿¡¼­´Â À¯ÀÇÇÏ°Ô ³·Àº °ªÀÌ °üÂûµÇ¾ú´Ù(p < 0.05).
¹Ì¼¼´©Ãâ°ú °ü·ÃÇÏ¿© 4±º »çÀÌ¿¡ Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ Á¸ÀçÇÏÁö ¾Ê¾Ò´Ù.

The aim of this study was to evaluate shear bond strength (SBS) of bulk-fill resin composites (RCs) to dentin and their micro-leakage. One high-viscosity bulk-fill RC and 2 low-viscosity bulk-fill RCs were compared with 1 conventional RC. 7thgenerationbondingagentswereused.
In order to evaluate SBS values, 40 permanent molars were selected and divided into 4 groups. The bulk-fill RCs were applied in 4 mm thickness, whereas the conventional RC was applied in 2 mm thickness.
In order to evaluate micro-leakage, class I cavities (5 ¡¿ 2 ¡¿ 4 mm) were prepared in 32 permanent molars. The teeth were divided into 4 groups and restored with resin composites in an increment of 4 mm for the bulk-fill RC and in 2 horizontal increments of 2 mm for the conventional RC.
The mean SBS value of conventional RC showed no statistically significant difference when compared with those of low-viscosity bulk-fill RCs. However, the mean SBS value of high-viscosity bulk-fill RC was significantly lower than that of conventional RC (p < 0.05).
There were no statistically significant differences in micro-leakage between the 4 groups.
For SBS and micro-leakage, the use of low-viscosity bulk-fill RCs might help clinicians simplify the procedure.

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Bulk-fill º¹ÇÕ·¹Áø; Àü´Ü°áÇÕ°­µµ; ¹Ì¼¼´©Ãâ; 7¼¼´ë »ó¾ÆÁú Á¢ÂøÁ¦
Bulk-fill resin composites; Shear bond strength; Micro-leakage; 7thgenerationbondingagent

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