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A STUDY ON THE MODE OF POLYMERIZATION OF LIGHT-CURED RESTORATIVE MATERIALS CURED WITH PLASMA ARC LIGHT CURING UNIT

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Abstract

º» ¿¬±¸´Â Çҷΰձ¤°ú ºñ±³ÇÏ¿©, °í°­µµÀÇ ´ÜÃàµÈ ÁßÇÕ ½Ã°£À» ÀåÁ¡À¸·Î ÇÏ´Â ÇöóÁ±¤ÀÇ È¿À²¼ºÀ» Æò°¡ÇÒ ¸ñÀûÀ¸·Î, ù°, ÁßÇÕ ½Ã°£°ú ÁßÇÕ °Å¸®¿¡ µû¸¥ ÁßÇÕµµÀÇ º¯È­¸¦ °ËÅä, ±¤Á¶»ç ½Ã°£À» Áõ°¡½Ãų °æ¿ì ƯÁ¤°Å¸® À̻󿡼­µµ ¼öº¹¹° ÇÏÃþ±îÁö ÃæºÐÇÑ ÁßÇÕÀÌ ÀÌ·ç¾îÁö´ÂÁö ¾Ë¾Æ º¸°í, µÑ°, ÁßÇÕ ¹Ý°æ¿¡ µû¶ó ±ÕÀÏÇÑ ÁßÇÕÀÌ ÀÌ·ç¾îÁö´ÂÁö º¸±â À§ÇØ ±¤Á¶»ç ºÎÀ§ÀÇ Áß
½ÉºÎ¿Í ¿ÜÃø º¯¿¬ºÎÀÇ ÁßÇÕµµ Â÷À̸¦ ºñ±³ÇÏ¿´´Ù. 2mm µÎ²²ÀÇ º¹ÇÕ·¹Áø ½ÃÆíÀÇ »ó¡¤ÇÏ¸é ¹Ì¼¼°æµµ ÃøÁ¤À» ÅëÇØ ÁßÇÕµµ¸¦ ºñ±³ÇØ º» °á°ú, ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. °Å¸®Áõ°¡¿¡ ¹Ù¸¥ »ó´ë±¤µµÀÇ °¨¼Ò´Â Çҷΰձ¤¿¡ ºñÇØ ÇöóÅ©¸¶±¤¿¡¼­ ±× Â÷ÀÌ°¡ Àû¾ú´Ù(p<0.05).
2. ÇöóÁ±¤, Çҷΰձ¤ ¸ðµÎ »ó¸éÀÇ ¹Ì¼¼°æµµ´Â ÁßÇհŸ® 2mm ÀÌ»óºÎÅÍ À¯ÀÇÇÏ°Ô °¨¼ÒµÇ¾úÀ¸¸ç, ÁßÇսð£ÀÇ Áõ°¡¿¡ µû¶ó Áõ°¡µÇ¾ú´Ù(p<0.05).
3. ÇöóÁ±¤ 3Ãʸ¦ Á¦¿ÜÇÏ°í, ÇϸéÀÇ ¹Ì¼¼°æµµ º¯È­´Â 4mmÀ̻󿡼­ ±Þ°ÝÈ÷ °¨¼ÒÇÏÀ¸¸ç, »ó¸é¿¡ ºñÇØ ÁßÇսð£°ú °Å¸®ÀÇ ¿µÇâÀ» ¸¹ÀÌ ¹Þ¾Ò´Ù(p<0.05).
4. ÇöóÁ±¤, Çҷΰձ¤ ¸ðµÎ Á¶»ç½Ã°£ÀÇ Áõ°¡¿¡µµ ºÒ±¸ÇÏ°í 4mm¿Í 6mm»çÀÌ¿¡¼­ ÇϸéÀÇ ¹Ì¼¼ °æµµÂ÷´Â ºñ±³Àû Å©°Ô ³ªÅ¸³µ´Ù(p<0.05).
5. ÇöóÁ±¤À» 6~9ÃÊ Àû¿ëÇÑ ¶§¿Í Çҷΰձ¤À» 40~80ÃÊ Àû¿ëÇÑ ¶§ÀÇ ¹Ì¼¼°æµµÄ¡ ¹× °Å¸®¿¡ µû¸¥ °æµµ º¯È­´Â À¯»çÇÏ¿´´Ù(p>0.05).
6. ÇöóÁ±¤, Çҷΰձ¤ ¸ðµÎ ·¹Áø ½ÃÆíÀÇ Áß¾Ó¿¡¼­ ¿ÜÃøÀ¸·Î °¥¼ö·Ï ¹Ì¼¼°æµµ´Â À¯ÀÇÇÏ°Ô °¨¼ÒÇÏ¿´´Ù(p<0.05).

The purpose of this study was to compare the effect of distance of light tip to resin surfaces and exposure time on the polymerization of surface and 2 mm subsurface of composite resins cured with two light sources; conventional halogen light (XL 3000. 3M, U.S.A.) and plasma arc light (Flipo, LOKKI, France) and compare the uniformity of polymerization from the center to the periphery of resin surfaces according to polymerization diameter cure with two light sources.
From the experiment, the following results were obtained.
1. Difference of relative light intensity decrease in plasma arc light smaller than that of conventional halogen light(p ( 0.05).
2. In all groups, microhardness of top surfaces was decreased when distance of the light tip to resin surfaces is more than 2mm and increased according to increase of exposure time(p ( 0.05).
3. Difference of microhardness of the 2mm subsurface was rapidly decreased when distance of light tip to resin surfaces is more than 4mm(except, plasma arc light exposure time of 3 seconds). and the distance of light tip to resin surfaces and exposure time more affected 2mm subsurface rather than top surface(p ( 0.05).
4. Although exposure time was increased. difference of microhardness of the 2mm subsurface with the distance of light tip to resin surfaces was relatively high in groups between below 4mm and 6 mm(p ( 0.05).
5. Plasma arc light exposure time of 6 to 9 seconds produced microhardness values and microhardness change according to various distance similar to those produced with 40 to 80 second exposure to a conventional halogen light (00.05) .
6. In all groups, microhardness was decreased gradually from the center to the periphery of resin surfaces(p ( 0.05).

Å°¿öµå

ÇöóÁ±¤;º¹ÇÕ ·¹Áø;ÁßÇÕ ½Ã°£;ÁßÇÕ °Å¸®;ÁßÇÕ ¹Ý°æ;Plasma arc light;Composite resins;Exposure time;Distance;Polymerization diameter

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