Àá½Ã¸¸ ±â´Ù·Á ÁÖ¼¼¿ä. ·ÎµùÁßÀÔ´Ï´Ù.

¹Ì¼¼ÀÔÀÚ ºÐ»ç¸¶¸ð Ç¥¸é󸮰¡ Fiber-Reinforced Composite Æ÷½ºÆ®ÀÇ ±¼°î°­µµ¿¡ ¹ÌÄ¡´Â ¿µÇâ

Influence of airborne-particle abrasion on flexural strength of fiber-reinforced composite post

±¸°­È¸º¹ÀÀ¿ë°úÇÐÁö 2016³â 32±Ç 1È£ p.24 ~ 31
¼Ò¼Ó »ó¼¼Á¤º¸
½ÉÀºÁÖ:Sim Eun-Ju ±èÁø¿ì:Kim Jin-Woo/Á¶°æ¸ð:Cho Kyung-Mo/¹Ú¼¼Èñ:Park Se-Hee

Abstract

¸ñÀû: ¹Ì¼¼ÀÔÀÚ ºÐ»ç¸¶¸ð Ç¥¸é󸮰¡ Fiber-Reinforced Composite (FRC) Æ÷½ºÆ®ÀÇ ±¼°î°­µµ¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Æò°¡ÇÏ´Â °ÍÀÌ´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý: µÎ Á¾·ùÀÇ FRC Æ÷½ºÆ® (DT Light Post, Size 2, Bisco Inc. / RelyX Fiber Post, Size 3, 3M ESPE)¸¦ »ç¿ëÇÏ¿© Ç¥¸é󸮿¡ µû¶ó 6°³ÀÇ ±×·ìÀ¸·Î ¹«ÀÛÀ§ ºÐ·ùÇÏ¿´´Ù. Ç¥¸é󸮸¦ À§ÇØ 30 ¥ìm Rocatec Soft¿Í 50 ¥ìm aluminum oxide¸¦ »ç¿ëÇÏ¿´´Ù. Ç¥¸éó¸® ÈÄ ÆíÆòÇÑ 5 mm ºÎºÐÀ» ¸¸´É½ÃÇè±â·Î 3Á¡ ±ÁÈû½ÃÇèÀ» ½ÃÇàÇÏ¿© FRC Æ÷½ºÆ®ÀÇ ±¼°î°­µµ¿Í ±¼°î°è¼ö¸¦ ÃøÁ¤ÇÏ°í Åë°èºÐ¼®ÇÏ¿´´Ù.

°á°ú: FRCÆ÷½ºÆ®ÀÇ ¹Ì¼¼ÀÔÀÚ ºÐ»ç¸¶¸ð Ç¥¸é󸮰¡ FRCÆ÷½ºÆ®ÀÇ ±¼°î°­µµ¿Í ±¼°î°è¼ö¿¡´Â ¿µÇâÀ» ¹ÌÄ¡Áö ¾ÊÀ½À» ¾Ë ¼ö ÀÖ¾ú´Ù.

°á·Ð: ÀÓ»ó°¡µéÀÌ FRCÆ÷½ºÆ®¿¡ ´ëÇÏ¿© ¹Ì¼¼ÀÔÀÚ ºÐ»ç¸¶¸ð Ç¥¸é󸮸¦ ÇÏ¿©µµ Æ÷½ºÆ®ÀÇ ±¼°î°­µµ¿Í ±¼°î°è¼ö¿¡´Â ¿µÇâÀ» ¹ÌÄ¡Áö ¾ÊÀ¸¸é¼­ Á¢Âø°­µµ¸¦ ³ôÀÏ ¼ö ÀÖÀ» ±Ù°Å ÁßÀÇ Çϳª°¡ µÉ ¼ö ÀÖÀ» °ÍÀÌ´Ù.

Purpose: Many studies have shown that airborne-particle abrasion of fiber post can improve the bonding strength to resin cement. But, airborne-particle abrasion may influence the property of fiber post. The purpose of this study is to evaluate the influence of airborne-particle abrasion on flexural strength of fiber post.

Materials and Methods: Two fiber-reinforced posts; DT Light Post Size 2 (1.8 mm diameter, Bisco Inc) and RelyX Fiber Post Size 3 (1.9 mm diameter, 3M ESPE); were used in this study. Each group was divided into 3 subgroups according to different surface treatments; without pretreatment: 50 ¥ìm aluminum oxide (Cobra¢ç, Renfert): and 30 ¥ìm aluminum oxide modified with silica (Rocatec Soft¢ç, 3M ESPE). After airborne-particle abrasion procedure, three-point bending test was done to determine the flexural strength and flexural modulus. The diameter of each posts was measured to an accuracy of 0.01 mm using a digital micrometer. There was no diameter change before and after airborneparticle abrasion. The mean flexural moduli and flexural strengths calculated using the appropriate equations. The results were statistically analyzed using One-way ANOVA and Scheffe¡¯s post-hoc test at 95% confidencial level.

Results: There was no significant difference on flexural strength between groups.

Conclusion: In the limitation of this study, flexural strength and flexural modulus of fiber post are not affected by airborne-particle abrasion.

Å°¿öµå

¹Ì¼¼ÀÔÀÚ ºÐ»ç¸¶¸ð Ç¥¸éó¸®; ±¼°î°­µµ; FRCÆ÷½ºÆ®; 3Á¡ ±ÁÈû½ÃÇè
airborne-particle abrasion; flexural strength; FRC post; three-point flexural test

¿ø¹® ¹× ¸µÅ©¾Æ¿ô Á¤º¸

 

µîÀçÀú³Î Á¤º¸

KCI