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A study on the changes in polymerization of light-activated composite resin with various exposure time and distance

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¾È¸í±â, Á¤Å¼º, ±è½Å,
¼Ò¼Ó »ó¼¼Á¤º¸
¾È¸í±â ( Ahn Myung-Ki ) - ºÎ»ê´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
Á¤Å¼º ( Jeong Tae-Sung ) - ºÎ»ê´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
±è½Å ( Kim Shin ) - ºÎ»ê´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

º» ¿¬±¸¿¡¼­´Â ±¤ÁßÇÕÇü º¹ÇÕ·¹ÁøÀ» ´ë»óÀ¸·Î ÁßÇհŸ®¿Í ½Ã°£ÀÇ º¯È­¿¡ µû¸¥ ÁßÇÕµµ¿Í °Å¸®¿¡ µû¸¥ ÀûÀýÇÑ ÁßÇսð£À» ¾Ë¾Æº¸±â À§ÇÏ¿© ÀÏÁ¤ ÁßÇÕ ±¤µµÇÏ¿¡¼­ ÁßÇհŸ®¿Í ½Ã°£À» ´Þ¸®ÇÏ¿© Àç·áÀÇ Ç¥¸é°ú 2mm ÇϹæÀÇ ¹Ì¼¼°æµµ¸¦ ÃøÁ¤ÇÑ ÈÄ À̸¦ ÅëÇÏ¿© °£Á¢ÀûÀ¸·Î ÁßÇÕµµ¸¦ Æò°¡ÇÏ¿´´Ù. ±¤ÁßÇÕÇü º¹ÇÕ·¹ÁøÀ¸·Î Z100°ú B25OÀ» »ç¿ëÇÏ¿´°í °¢ Àç·áº°·Î Á¶»ç´Ü°úÀÇ °Å¸®°¡ 0, 2, 4, 6mmÀÎ »óÅ¿¡¼­ 20, 30, 40, 60, 80ÃÊ°£ ±¤Á¶»ç¸¦ ½ÃÇàÇÏ¿´´Ù. ÁßÇÕ ÈÄ Ç¥Ãþ°ú ³»ÃþÀÇ °æµµ¸¦ ¹Ì¼¼°æµµ ÃøÁ¤±â·Î ÃøÁ¤ÇÏ¿´´Ù. ÃøÁ¤Ä¡¸¦ Åë°èó¸®ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.

1. °Å¸®ÀÇ Áõ°¡¿¡ µû¶ó »ó´ë±¤µµ´Â 2mm À̻󿡼­ ±Þ°ÝÈ÷ °¨¼ÒÇÏ¿´´Ù(p<0.05).

2. ¹Ì¼¼ °æµµ´Â »ó´ë±¤µµ¿Í Á¶»ç½Ã°£ÀÇ Áõ°¡¿¡ µû¶ó Ç¥Ãþ ¹× ³»Ãþ¿¡¼­ ¸ðµÎ Áõ°¡ÇÏ¿´´Ù(p<005).

3. ³»ÃþÀÌ Ç¥Ãþ¿¡ ºñÇØ »ó´ëÀûÀ¸·Î ÁßÇհŸ®¿Í ½Ã°£ÀÇ ¿µÇâÀ» ¸¹ÀÌ ¹Þ¾Ò´Ù(p<0.05).

4. Á¶»ç ½Ã°£ÀÇ Áõ°¡¿¡µµ ºÒ±¸ÇÏ°í Z100 ½ÃÆí¿¡¼­ ÁßÇհŸ®°¡ 4mm ÀÌÇϱº°ú 6mm±º¿¡¼­, Z25O ½ÃÆí¿¡¼­´Â 2mm ÀÌÇϱº°ú 4mm À̻󱺿¡¼­ ³»ÃþÀÇ ¹Ì¼¼ °æµµ Â÷ÀÌ°¡ ºñ±³Àû Å©°Ô ³ªÅ¸³µ´Ù(p<0.05).

The aim of this study was to evaluate the effect of the distance of the light tip to the surface of restoration and

exposure tome on the polymerization of surface and 2mm below the surface of light-activated composite resins.

Two light-activated composite resins were used. From the experiment, the following results were obtained.

1. Relative light Intensity rapidly decreased when distance of the light tip to the sulfate of material is more than 2mm(p<0.05).

2. In all groups, microhardness was increased according to the increase of relative light intensity and exposure time(p<0.05).

3. The distance of the light tip to the surface of restoration and exposure time more affected 2mm below the surface rather than the surface(p<0.05).

4. Although exposure time was increased, difference of microhardness of the 2mm bolow the surface with the

distance of the light tip to the surface of restoration was relatively high in Z100 between below 4mm and

other groups and Z250 between below 2mm and other groups(p<0.05).

Å°¿öµå

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Light-activated composite resin;Exposure time;Distance;Microhardness

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