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REAL-TIME MEASUREMENT OF DENTINAL TUBULAR FLUID FLOW DURING AND AFTER AMALGAM AND COMPOSITE RESTORATIONS

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Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº ¾Æ¸»°¨°ú º¹ÇÕ·¹ÁøÀÇ ¼öº¹ °úÁ¤°ú ¼öº¹ ÈÄ »ó¾Æ¼¼°ü¾×ÀÇ È帧(dentinal fluid flow, DFF)À» ÃøÁ¤Çϱâ À§ÇÔÀÌ´Ù. Ä¡±ÙÀ» ÀýÁ¦ÇÑ Á¦ 3 ´ë±¸Ä¡¸¦ ÀÚü Á¦ÀÛÇÑ ¹Ì¼¼ À¯Ã¼ È帧 ÃøÁ¤ÀåÄ¡¿¡ ¿¬°áÇÑ ÈÄ 1±Þ ¿Íµ¿À» Çü¼ºÇÏ¿© ¾Æ¸»°¨°ú º¹ÇÕ·¹Áø ¼öº¹À» ½ÃÇàÇÏ¿´´Ù. DFFÀÇ ÃøÁ¤Àº ¿Íµ¿ Çü¼ººÎÅÍ ¼öº¹ ÈÄ 30ºÐ±îÁö ¿¬¼ÓÀûÀ¸·Î ÀÌ·ç¾îÁ³°í, ¼öº¹ ÈÄ 3, 7ÀÏ¿¡ Àç ÃøÁ¤ÇÏ¿´´Ù. ÁÖ¼ö ÇÏ¿¡ ¿Íµ¿ Çü¼º ½Ã DFF´Â inward·Î, ³¡³­ ÈÄ¿¡´Â outward·Î ¹Ù²î¾ú´Ù. ¾Æ¸»°¨ ÃæÀü ½Ã DFF´Â inward·Î ¹Ù²î¾ú°íÃæÀü ¿Ï·á ÈÄ ¹Ì¾àÇÑ outward DFF¸¦ º¸¿´´Ù. º¹ÇÕ·¹Áø ¼öº¹ÀÇ °æ¿ì, »ê ó¸® ÈÄ ¼ö¼¼¿Í °ÇÁ¶ ½Ã °¢°¢ inward¿Í outward DFF¸¦ º¸¿´°í primer µµÆ÷ ÈÄ °ø±â ºÐ»ç´Â ±Þ°ÝÇÑ outward, ¼Ò¼ö¼º º»µùÁ¦¸¦ Àû¿ëÇÏ´Â ´Ü°è¿¡¼­´Â outward ¿´´ø DFF°¡ °¨¼ÒÇÏ¿© 0¿¡ °¡±î¿öÁö°Å³ª ¾à°£ inward È帧À» º¸¿´´Ù. Á¢ÂøÁ¦¿Í º¹ÇÕ·¹ÁøÀÇ ±¤ÁßÇÕÀº ±Þ°ÝÇÑ inwardÀÇ DFF¸¦ ÀÏÀ¸Ä×´Ù. ¼öº¹ ÈÄ 30ºÐ, 3ÀÏ, 7ÀÏ° ¼öº¹ Àç·á¿¡ µû¸¥ DFFÀÇ °¨¼Ò¿¡ Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ´Â ¾ø¾ú´Ù (P > 0.05).

The aim of this study was to measure the dentinal tubular fluid flow (DFF) during and after amalgam and composite restorations. A newly designed fluid flow measurement instrument was made. A third molar cut at 3 mm apical from the CEJ was connected to the flow measuring device under a hydrostatic pressure of 15 cmH2O. Class I cavity was prepared and restored with either amalgam (Copalite varnish and Bestaloy) or composite (Z-250 with ScotchBond MultiPurpose: MP, Single Bond 2: SB, Clearfil SE Bond: CE and Easy Bond: EB as bonding systems). The DFF was measured from the intact tooth state through restoration procedures to 30 minutes after restoration, and re-measured at 3 and 7days after restoration. Inward fluid flow (IF) during cavity preparation was followed by outward flow (OF) after preparation. In amalgam restoration, the OF changed to IF during amalgam filling and slight OF followed after finishing. In composite restoration, application CE and EB showed a continuous OF and air-dry increased rapidly the OF until light-curing, whereas in MP and SB, rinse and dry caused IF and OF, respectively. Application of hydrophobic bonding resin in MP and CE caused a decrease in flow rate or even slight IF. Light-curing of adhesive and composite showed an abrupt IF. There was no statistically significant difference in the reduction of DFF among the materials at 30 min, 3 and 7 days after restoration (P > 0.05). [J Kor Acad Cons Dent 34(5):467-476, 2009]

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Dentinal tubular fluid flow;Amalgam;Composite;Bonding system

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