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Flexural and compressive properties of layered specimens formed with flowable and composite resins

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ÀÌÀåÈÆ ( Lee Jang-Hoon ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
±è½Â¼­ ( Kim Seung-Seo ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
¼³È¿Á¤ ( Seol Hyo-Joung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
±Ç¿ëÈÆ ( Kwon Yong-Hoon ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç

Abstract

±íÀº ¿Íµ¿À» ¼öº¹ÇÒ ¶§ º£À̽º Àç·á·Î À¯µ¿¼º·¹ÁøÀÌ »ç¿ëµÈ´Ù. ÀÌ·± °æ¿ì À¯µ¿¼º ·¹ÁøÀº »ó¹æ¿¡ À§Ä¡ÇÏ´Â ´Ù¸¥ º¹ÇÕ·¹Áø°ú ÃþÀ» ÀÌ·ç°Ô µÇ´Âµ¥ º» ¿¬±¸¿¡¼­´Â ±×·¸°Ô ÀÌ·ç¾îÁø ·¹ÁøÃþÀÇ ±â°èÀû ¼ºÁúÀ» Æò°¡ÇÑ´Ù. À̸¦ À§ÇÏ¿© 5Á¾ÀÇ À¯µ¿¼º·¹ÁøÀ» ÅÃÇÏ¿© º£À̽º Àç·á·Î »ç¿ëÇÏ°í 2Á¾ÀÇ º¹ÇÕ·¹ÁøÀ» ÅÃÇÏ¿© º£À̽º »ó¹æ¿¡ À§Ä¡Çϵµ·Ï ÇÏ¿´´Ù. ÀÌÈÄ¿¡ ÀÌµé °¢°¢°ú 10°¡Áö Á¶ÇÕÀ¸·Î µÈ Ãþ ½Ã·áÀÇ ±¼°î ¹× ¾ÐÃ༺ÁúÀ» Æò°¡ÇÏ¿´´Ù. ±× °á°ú À¯µ¿¼º·¹Áø ÀÚü°¡ ³ôÀº ±¼°î °­µµ¿Í modulus°ªÀ» °¡Áø °æ¿ì º¹ÇÕ·¹Áø°ú ÃþÀ» ÀÌ·ç¾îµµ ³ôÀº ±¼°î °­µµ¿Í modulus¸¦ º¸¿´´Ù. ±×·¯³ª ¾ÐÃà°­µµÀÇ °æ¿ì´Â ±×·¸Áö ¾Ê¾Æ¼­ ¾ÐÃà°­µµ°¡ Å©´ø ÀÛ´ø(259.8~439.8 MPa)°£¿¡ Ãþ¿¡ ÀÌ·é ½Ã·áÀÇ ¾ÐÃà°­µµ´Â ³ôÁö ¾Ê¾Ò°í(251.4~295.3 MPa), ±¼°î modulus´Â ¾ÐÃà modulus¿Í ¼±ÇüÀûÀ¸·Î ³ôÀº »ó°ü°ü°è¸¦ º¸¿´´Ù. °á±¹ º¹ÇÕ·¹Áø°ú À¯µ¿¼º·¹ÁøÀ¸·Î ÃþÀ» ÀÌ·é ½Ã·áÀÇ ±â°èÀû ¼ºÁúÀº »óºÎ¿¡ À§Ä¡ÇÏ´Â º¹ÇÕ·¹Áø¿¡ »ó°ü¾øÀÌ º£À̽ºÀÇ À¯µ¿¼º·¹Áø¿¡ ÀÇÁ¸ÇÏ¿´Áö¸¸ ±× ¼ºÁúÀº ÀÏ°ü¼ºÀ» º¸ÀÌÁö ¾Ê¾Ò´Ù.

Flowable resins can be used as a base material during the restoration of deep tooth cavity. The purpose of the present study was to evaluate the mechanical properties of the layered specimens which have flowable resin as a base material. For the study, two composite resins and five flowable resins were chosen for the overlying and base materials, respectively. Flexural and compressive properties of each bulk and ten layered specimens were measured. Layered specimens showed high flexural strength (FS) and flexural modulus (FM) if bulk state FS and FM of the base flowable resin are high. However, compressive strength (CS) was not that case. CS of the layered specimen was not high (251.4~295.3 MPa) whether CS of the bulk state is high or not (259.8~439.8 MPa). FM showed high linear correlation with CM. After all mechanical properties of the layered specimens were not consistently influenced by the mechanical properties of the base flowable resins regardless of the overlying composite resins.

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·¹Áø¼ö¸®; º¹ÇÕ·¹Áø; ±¼°î¼ºÁú; ¾ÐÃ༺Áú
Resin repair; Composite resin; Flexural property; Compressive property

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