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A COMPARATIVE STUDY OF WATER ABSORPTION AND RELATED CHANGES OF COMPRESSIVE STRENGTH IN THREE RESTORATIVE MATERIALS

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Abstract

·¹Áø°è¿­ÀÇ ½É¹Ì¼º ¼öº¹Àç´Â ±¸¼º¼ººÐ¿¡ µû¶ó °¢±â ´Ù¸¥ Ư¼º°ú ¹°¸®Àû ¼ºÁúÀ» ³ªÅ¸³¾ »Ó¸¸ ¾Æ´Ï¶ó, ¼öº¹¹° ÁÖº¯ÀÇ È¯°æµµ ¹°¼º¿¡ ¸¹Àº ¿µÇâÀ» ¹ÌÄ£´Ù. ƯÈ÷ ¼öºÐÀÇ Èí¼ö´Â ¼öº¹Àç ¹°¼º º¯È­¿¡ Å« ¿ªÇÒÀ» Çϸç, Àç·áÀÇ Á¶¼º°ú Ä£¼ö¼º Á¤µµ, °æÈ­±âÀü, ħÁö±â°£°ú ¹èÁö µîÀÇ ´Ù¾çÇÑ ¿ä¼Ò¿Í °ü·ÃµÇ¾î ¼öº¹À縶´Ù °¢±â ´Ù¸¥ ¾ç»óÀ» ³ªÅ¸³½´Ù. º» ¿¬±¸ÀÇ ¸ñÀûÀº ÀÓ»ó¿¡¼­ ¸¹ÀÌ ÀÌ¿ëµÇ°í ÀÖ´Â ·¹Áø°è¿­ÀÇ ¼öº¹¹° Áß¿¡¼­ º¹ÇÕ·¹Áø, ·¹Áøº¯Çü ±Û¶ó½º¾ÆÀÌ¿À³ë¸Ó ¹× ÄÞÆ÷¸ÓÀÇ Ä§Áö±â°£¿¡ µû¸¥ ¼öºÐÈí¼öµµ¿Í ¾ÐÃà°­µµÀÇ º¯È­¸¦ °èÃøÇÏ¿© ºñ±³ÇÏ°í, ¼öºÐÈí¼öµµ¿Í ¾ÐÃà°­µµ °£¿¡ ³ªÅ¸³ª´Â »ó°ü°ü°è¸¦ ¹àÈ÷°íÀÚÇÔÀÌ´Ù.
º¹ÇÕ·¹ÁøÀ¸·Î´Â Z-100(3M, U.S.A.), ÄÞÆ÷¸Ó´Â F-2000(3M, U.S.A.), ·¹Áøº¯Çü ±Û¶ó½º¾ÆÀÌ¿À³ë¸Ó´Â Vitremer Restorative(3M, U.S.A.)¸¦ ÀÌ¿ëÇÏ¿© ¼öºÐÈí¼öµµ¿Í ¾ÐÃà°­µµ ÃøÁ¤À» À§ÇÑ ½ÃÆíÀ» °¢°¢ Á¦ÀÛÇÏ¿´´Ù. °¢ ½ÃÆíÀ» 1ÀÏ, 2ÁÖ, 4ÁÖ, 8ÁÖ°£ 37¡É Áõ·ù¼ö¿¡ ³Ö¾î º¸°üÇÑ ÈÄ ¼öºÐÈí¼öµµ´Â ħÁö Àü°ú ÈÄÀÇ Áú·®Â÷¸¦ ºÎÇÇ·Î ³ª´­ °ªÀ¸·Î »êÃâÇÏ°í, ¾ÐÃà°­µµ´Â Instron(Instron Corporation Headquarters, U.S.A.)À» ÀÌ¿ëÇÏ¿© ÃøÁ¤ÇÑ ÈÄ ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ¼¼ °¡Áö ¼öº¹Àç ¸ðµÎ ħÁö±â°£ÀÌ ±æ¾îÁü¿¡ µû¶ó ¼öºÐÈí¼öµµ°¡ Áõ°¡ÇÏ¿´À¸¸ç, ¼öºÐÈí¼öÀÇ ´ëºÎºÐÀº Ãʱâ 2ÁÖ µ¿¾È¿¡ ³ªÅ¸³µ´Ù(P<0.001).
2. ·¹Áøº¯Çü ±Û¶ó½º¾ÆÀÌ¿À³ë¸ÓÀÇ ¼öºÐÈí¼öµµ°¡ º¹ÇÕ·¹Áø°ú ÄÞÆ÷¸Ó¿¡ ºñÇØ »ó´ëÀûÀ¸·Î Å©°Ô ³ªÅ¸³µ´Ù.
3. ¼¼ °¡Áö ¼öº¹Àç ¸ðµÎ ħÁö½Ã°£¿¡ µû¶ó ¾ÐÃà°­µµ°¡ °¨¼ÒÇÏ¿´À¸¸ç(º¹ÇÕ·¹Áø°ú ÄÞÆ÷¸Ó: P<0.001, ·¹Áøº¯Çü ±Û¶ó½º¾ÆÀÌ¿À³ë¸Ó : P<0.05), ƯÈ÷ º¹ÇÕ·¹ÁøÀÌ ´Ù¸¥ Àç·á¿¡ ºñÇØ °¡Àå Å« °¨¼Ò °æÇâÀ» ³ªÅ¸³Â´Ù.
4. ¼¼ °¡Áö ¼öº¹Àç ¸ðµÎ ¼öºÐÈí½ºµµ°¡ Áõ°¡ÇÔ¿¡ µû¶ó ¾ÐÃà°­µµ°¡ °¨¼ÒÇÏ¿´´Ù(P<0.05).
The aesthetic restorative materials are widely used in recent dentistry, showed not only the different quality between each component but also showed that the environment of the material has important effect on the physical properties of the material. Especially, when the restoratives are restored in the mouth, and since saliva is existing, the restoratives are always exposed to water and affected by the saliva. The purpose of this study was to research and compare the change of the degree of water sorption after water immersion of three types of the resin-based materials and the compressive strength. and observe the relation between the change of the water absorbing degree and the compressive strength.
Z-100(3M, U.S.A) as a composite resin. F-2000(3M, U.S.A) as a compomer, and Vitremer Restoratives(3M, U.S.A) as a resin-modified GIC were used. and each specimen was made to measure the water sorption and to evaluate the compressive strength. The specimens for measurement of the water sorption and the compressive strength were divided into 4 groups(l day, 2 weeks, 4 weeks, and 8weeks). Each specimen was filled in the 30cc vial with 20cc of distilled water during the fixed amount of period in 37 C. The water sorption is decided by dividing the difference of weight before and after the immersion by the volume, and the compressive strength was measured by using the instron after the immersion.
The following results were obtained ;
1. The more the water sorption increased, the more the immersion period of three restorative materials was long. And the most of water sorption was obtained during the first 2 weeks(P<0.001).
2. The water sorption of resin-modified GIC was higher than composite resin and compomer.
3. The more the compressive strength decreased, the more the immersion period of three restorative materials increased(composite resin and compomer: P(0.001. resin-modified GIC: P(0.05). Especially. the amount of the reduction in compressive strength of the composite resin was the highest.
4. The more the water sorption of all materials increased, the more the compressive s rength decreased(P<0.05).

Å°¿öµå

¼öºÐÈí¼öµµ;¾ÐÃà°­µµ;º¹ÇÕ·¹Áø;ÄÞÆ÷¸Ó;·¹Áøº¯Çü ±Û¶ó½º¾ÆÀÌ¿À³ë¸Ó;Water sorption;Compressive strength;Composite resin;Compomer;Resin-modified GIC

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