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Temperature changes and compressive properties of bulk-fill composites by light curing

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À̵¿È£ ( Yi Dong-Ho ) - Pusan National University School of Dentistry Department of Dental Materials
¼³È¿Á¤ ( Seol Hyo-Joung ) - Pusan National University School of Dentistry Department of Dental Materials
±Ç¿ëÈÆ ( Kwon Yong-Hoon ) - Pusan National University School of Dentistry Department of Dental Materials

Abstract

º» ¿¬±¸´Â ±¤Á¶»ç¿¡ µû¸¥ bulk-fill composites (BFCs)ÀÇ ¿Âµµº¯È­¿Í ¾ÐÃ༺ÁúÀ» Æò°¡ÇÏ¿´´Ù. À̸¦ À§ÇÏ¿© 5Á¾ÀÇ BFCsÀ» Æ÷ÇÔÇÏ¿©7Á¾ÀÇ ·¹Áø ±â¹ÝÀÇ º¹ÇÕ·¹Áø(RBCs)À» ÅÃÇÏ°í À̵鿡¼­ ±¤Á¶»ç ÀüÈÄÀÇ ÃÖ´ë¿ÂµµÁõ°¡¿Í ¹ß¿­ ±×¸®°í 4 mm µÎ²² »óÅ¿¡¼­ ¾ÐÃà°­µµ(CS)¿Ímodulus (CM)À» Æò°¡ÇÏ¿´´Ù. ±× °á°ú ±¤°¨¼Ò°è¼ö(AC)¿Í ÇÊ·¯ ·® »çÀÌ¿¡´Â ³·Áö ¾ÊÀº »ó°ü¼ºÀÌ ÀÖ¾ú´Ù. ÇÑ Á¦Ç°À» Á¦¿ÜÇϸé BFCsÀÇAC´Â RBCsº¸´Ù ³·¾Ò´Ù. 4 mm µÎ²²ÀÇ ½Ã·á¿¡¼­ ¸ðµç Á¦Ç°ÀÌ 5¡É ÀÌ»óÀÇ ¿Âµµ Áõ°¡¿Í ¹ß¿­À» º¸¿´´Ù. ½Ã·áµéÀÇ CS¿Í CM °ªÀº°¢°¢ 69-116 MPa¿Í 1.3-2.8 GPa À̾ú´Ù. BFCs¿Í RBCs »çÀÌ¿¡¼­ ¿Âµµº¯È­¿Í ¾ÐÃ༺ÁúÀº ÀÏ°ü¼º ÀÖ´Â Â÷ÀÌ°¡ ¾ø¾ú°í Åë°èÀûÀ¸·ÎµµÀ¯ÀÇÇÏÁö ¾Ê¾Ò´Ù.

The purpose of the present study was to assess the temperature change and compressive property of bulk-fill composites (BFCs) by the light curing. Seven resin-based composites (RBCs), including five BFCs, were chosen to evaluate their maximum temperature rise and exothermic heat during and after light curing and compressive strength (CS) and modulus (CM) for 4-mm thick state. Light attenuation coefficients (ACs) showed reasonably high correlation with filler content (vol% and wt%).
Except one resin product, AC values of BFCs were lower than those of RBCs tested. All the tested specimens showed temperature rise (9.8-23.6¡É) and exothermic heat (4.2-18.3¡É) for 4-mm thick case. CS and CM values of the tested specimens ranged approximately 69 to 116 MPa and 1.3 to 2.8 GPa, respectively. The difference of temperature changes and compressive properties (CS and CM) between BFCs and RBCs was not consistent and had no statistically consistent significance.

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Bulk-fill composites; Temperature change; Compressive property

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