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A STUDY ON THE HYGROSCOPIC EXPANSION OF COMPOMER

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Abstract

ÄÄÆ÷¸Ó´Â »ê¼ºÈ­µÈ ÀÌÁß ±â´É¼º ·¹Áø ´Ü·®Ã¼¿Í fluoro-alumino-silicate±Û¶ó½º ÀÔÀÚ·Î ±¸¼ºµÇ¾î Ãʱ⿡´Â º¹ÇÕ·¹Áø°ú °°ÀÌ ±¤¿ø¿¡ ÀÇÇØ ÁßÇյǸç ÀÌÂ÷ÀûÀ¸·Î ±¸°­³» ¼öºÐÀ» Èí¼öÇϸ鼭 ±Û¶ó½º ¾ÆÀÌ¿À³ë¸Ó ½Ã¸àÆ®¿Í À¯»çÇÑ »ê-¿°±â ¹ÝÀÀÀ¸·Î ÁßÇյǰí ÀÌÀÇ °á°ú·Î ¹°¼ºÀÇ ÀúÇϾøÀÌ Áö¼ÓÀûÀ¸·Î ºÒ¼Ò¸¦ À¯¸®ÇÑ´Ù°í º¸°íµÇ°í ÀÖÀ¸¸ç ¹°ºÐÀÚ¸¦ Èí¼öÇÏ¿© ¼öÈ­µÊ¿¡ µû¶ó ¼­¼­È÷ ÆØâÇÏ¿© ±¤ÁßÇÕ½ÃÀÇ ¼öÃàÀ» º¸»óÇÏ°í ¹Ì¼¼´©ÃâÀ» ÃÖ¼ÒÈ­ÇÒ ¼ö ÀÖ´Ù°í º¸°íµÇ°í ÀÖÀ¸³ª ¾ÆÁ÷ È®¸³µÇ¾î ÀÖÁö´Â ¾ÊÀº »óÅÂÀÌ´Ù ÀÌ¿¡ º» ¿¬±¸´Â ÇöÀç ¼Ò¾ÆÄ¡°ú ÀÓ»ó¿¡¼­ ¸¹ÀÌ »ç¿ëµÇ°íÀÖ´Â ÄÄÆ÷¸Ó¸¦ ´ë»óÀ¸·Î ÃʱâÀÇ ÁßÇÕ¼öÃà¿¡ ÀÇÇÑ ¹Ì¼¼´©ÃâÀÌ ¼öÈ­ ÆØâ¿¡ ÀÇÇØ °¨¼ÒµÇ´ÂÁö ¿©ºÎ¸¦ º¹ÇÕ·¹Áø°ú ºñ±³Çϱâ À§ÇÏ¿© 5±Þ ¿Íµ¿ÀÇ ±³ÇÕ¸éÃø°ú Ä¡Àº¸éÃøÀÇ ¹Ì¼¼´©Ãâ¾çÀ» 1ÀÏ°ú 30ÀÏ ÈÄ¿¡ ÃøÁ¤ÇÑ °á°ú 30ÀÏ ÈÄ ÄÄÆ÷¸ÓÀÇ Ä¡Àº¸éÃø¿¹¼­ ÇöÀúÈ÷ ³·Àº ¹Ì¼¼´©ÃâÀ» º¸¿´´Ù.

Compomer, like resin composite, undergoes shrinkage during setting. But, due to the structure of glass ionomers and their hydrophilic nature, water sorption and subsequent expansion may lead to compensation of the shrinkage.
The purpose of this study was to evaluate the change of microleakage after 30day-water-storage of compomer and composite resin.
40 sound third molars were used for the microleakage test. Z-100 resin was used for the control groups(Group I and 1). Dyract AP for the experimental groups (Group II and N). The storage time was 1 day in Group I , II and 30days in Group ll{ , IV.
The result from the this study can be summarized as follows;
1. No significant difference could be found in microleakage of occlusal margin between each group(p)0.05).
2. In microleakage of gingival margin, no significant difference could be found between group I and II , and between group I and III (p)0.05).
3. Group N was showed less micoleakage than group II and group 1Il in gingival margin(p(0.05).

Å°¿öµå

¼öÈ­ÆØâ;ÄÄÆ÷¸Ó;¹Ì¼¼´©Ãâ;Hygroscopic expansion;Compomer;Microleakage

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