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A NEW METHOD TO MEASURE THE LINEAR POLYMERIZATION SHRINKAGE OF COMPOSITES USING A PARTICLE TRACKING METHOD WITH COMPUTER VISION

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ÀÌÀκ¹, ¹Î¼±È«, ¼­´ö±Ô, ±è¼±¿µ, ±Ç¿µÃ¶,
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ÀÌÀκ¹ ( Lee In-Bog ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Á¸Çб³½Ç
¹Î¼±È« ( Min Sun-Hong ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Á¸Çб³½Ç
¼­´ö±Ô ( Seo Deog-Gyu ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Á¸Çб³½Ç
±è¼±¿µ ( Kim Sun-Young ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Á¸Çб³½Ç
±Ç¿µÃ¶ ( Kwon Young-Chul ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Á¸Çб³½Ç

Abstract

¼öº¹¿ë º¹ÇÕ·¹ÁøÀÌ µµÀÔµÈ ÀÌÈÄ ¸¹Àº ¹°¼ºÀÇ Çâ»óÀÌ ÀÌ·ç¾îÁ³À¸³ª ÁßÇÕ¼öÃàÀº ¾ÆÁ÷ ÇØ°áµÇÁö ¾ÊÀº ÁÖ¿ä ´ÜÁ¡À¸·Î ³²¾ÆÀÖ´Ù. ÁßÇÕ¼öÃàÀÌ ÀûÀº º¹ÇÕ·¹ÁøÀ» ¸¸µé±â À§ÇÑ ¸¹Àº ³ë·ÂÀÌ ÀÌ·ç¾îÁ® ÃÖ±Ù¿¡ silorane ±âÁúÀÇ Àú¼öÃà º¹ÇÕ·¹ÁøÀÌ °³¹ßµÇ¾ú°í, Á¤¹ÐÇÏ°Ô ÁßÇÕ¼öÃàÀ» ÃøÁ¤Çϱâ À§ÇÑ ¿©·¯ ¹æ¹ýµéÀÌ ½ÃµµµÇ¾ú´Ù. º» ¿¬±¸¿¡¼­´Â ÄÄÇ»ÅÍ ½Ã°¢(computer vision)À» ÀÌ¿ëÇÏ¿© ½ÃÆí¿¡ Á÷Á¢ Á¢ÃËÇÏÁö ¾ÊÀ¸¸ç ±¤ÁßÇÕ º¹ÇÕ·¹ÁøÀÇ ¼±ÇüÁßÇÕ¼öÃàÀ» ÃøÁ¤ÇÒ ¼ö ÀÖ´Â ÀÔÀÚ ÃßÀû ½Ã½ºÅÛÀ» °³¹ßÇÏ¿´°í À̸¦ ÀÌ¿ëÇÏ¿© silorane (P90) ¹× methacrylate (Z250°ú Z350) ±âÁúÀÇ ±¤ÁßÇÕ º¹ÇÕ·¹ÁøÀÇ ÁßÇÕ¼öÃà °Åµ¿À» ÃøÁ¤ÇÏ¿© ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù. 1. º¹ÇÕ·¹ÁøÀÇ ¼±ÇüÁßÇÕ¼öÃàÀº 0.33-1.41% ¿´À¸¸ç silorane±âÁúÀÇ º¹ÇÕ·¹ÁøÀÎ P90ÀÌ °¡Àå ³·¾Ò°í Z250, Z350ÀÇ ¼øÀ¸·Î Áõ°¡ÇÏ¿´´Ù. 2. º» Àåºñ´Â ¼±ÇüÁßÇÕ¼öÃàÀ» ½ÃÆíÀÇ ÇüÅ¿¡ ¹Î°¨ÇÏÁö ¾Ê°í º¹ÀâÇÑ °úÁ¤¾øÀÌ ½Ç½Ã°£À¸·Î ÃøÁ¤ÇÒ ¼ö ÀÖ¾ú´Ù.

Since the introduction of restorative dental composites, their physical properties have been significantly improved. However, polymerization shrinkage is still a major drawback. Many efforts have been made to develop a low shrinking composite, and silorane-based composites have recently been introduced into the market. In addition, many different methods have been developed to measure the polymerization shrinkage. In this study, we developed a new method to measure the linear polymerization shrinkage of composites without direct contact to a specimen using a particle tracking method with computer vision. The shrinkage kinetics of a commercial silorane-based composite (P90) and two conventional methacrylate-based composites (Z250 and Z350) were investigated and compared. The results were as follows: 1. The linear shrinkage of composites was 0.33-1.41%. Shrinkage was lowest for the silorane-based (P90) composite, and highest for the flowable Z350 composite. 2. The new instrument was able to measure the true linear shrinkage of composites in real time without sensitivity to the specimen preparation and geometry.

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º¹ÇÕ·¹Áø; ¼±ÇüÁßÇÕ¼öÃà; ÄÄÇ»ÅÍ ½Ã°¢; ÀÔÀÚÃßÀû
Composites; Silorane; Linear polymerization shrinkage; Computer vision; Particle tracking

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