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EFFECT OF CURING EFFICIENCY AND AGING ON THE PHYSICAL PROPERTIES OF DENTAL COMPOSITE RESINS

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Abstract

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È­ÇÐÁßÇÕÇü ÄÞÆ÷ÁþÆ® ·¹Áø 3 Á¾°ú ±¤ÁßÇÕÇü ÄÞÆ÷ÁþÆ® ·¹Áø 8 Á¾ µî ÃÑ 11 Á¾ÀÇ Ä¡°ú¿ë ÄÞ
Æ÷ÁþÆ® ·¹ÁøÀ¸·Î 1 Â÷ ÁßÇÕµµÀÇ Â÷ÀÌ ¹× 2Â÷ ÁßÇÕ¿¡ µû¸¥ ÁßÇÕµµ º¯È­°¡ Ä¡°ú¿ë ÄÞÆ÷ÁþÆ®
·¹ÁøÀÇ ¹°¼º¿¡ ÁÖ´Â ¿µÇâÀ» ÃøÁ¤Çϱâ À§ÇÏ¿©, ±¤ÁßÇÕÇü ÄÞÆ÷ÁþÆ® ·¹ÁøÀº ±¤ÁßÇÕ±âÀÇ ÀÔ·ÂÀü
¾ÐÀ» Á¶ÀýÇÏ¿© »ó´ë±¤µµ¸¦ 25, 60, 90¹× 100%·Î º¯È­ÇÏ¿© ÁßÇÕÇÑ ½ÇÇ豺, È­ÇÐÁßÇÕÇü ÄÞÆ÷
ÁþÆ® ·¹ÁøÀº ÁßÇÕÇÑ ÈÄ 37¡É ¿Í 60¡É ¿¡¼­ ½ÃÈ¿ÇÑ ½ÇÇ豺À¸·Î ºÐ·ùÇÏ¿© °ø±âÁß (´ëÁ¶±º), Áõ
·ù¼ö, ÀΰøŸ¾×, ¿¡Åº¿Ã ¹× 0.1 ¸ô ³óµµÀÇ ÃÊ»ê ¼ö¿ë¾×¿¡¼­ 1, 7, 14 ¹× 28 ÀÏ°£ ½Ãȿó¸®ÇÑ
ÈÄ ¾ÐÃà°­µµ, Æı«Àμº, ¿ëÇصµ ¹× ¼öºÐÈí¼ö¼ºÀ» ÃøÁ¤ÇÑ ¹Ù ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. »ó´ë±¤µµ°¡ Áõ°¡ÇÒ¼ö·Ï ±¤ÁßÇÕÇü ÄÞÆ÷ÁþÆ® ·¹ÁøÀÇ ¾ÐÃà°­µµ¿Í Æı«ÀμºÀº Áõ°¡ÇÏ¿´°í,
¿ëÇصµ´Â °¨¼ÒÇÏ¿´´Ù.
2.È­ÇÐÁßÇÕÇü ¹× ±¤ÁßÇÕÇüÀÇ ¾ÐÃà°­µµ´Â °ø±âÁß¿¡¼­ ½ÃÈ¿ÇÑ °æ¿ì °¡Àå ³ô¾Ò°í, Æı«ÀμºÀº
0.1 ¸ô ÃÊ»ê¼ö¿ë¾×¿¡¼­, ¿ëÇصµ´Â ¿¡Åº¿Ã¿¡¼­ ó¸®ÇÑ °æ¿ì °¡Àå ³ô¾Ò´Ù.
3.½ÃÈ¿±â°£¿¡ µû¸¥ ±¤ÁßÇÕÇüÀÇ ¾ÐÃà°­µµ´Â ¿¡Åº¿Ã¿¡¼­ °¡Àå ¸¹ÀÌ º¯È­ÇÏ¿´À¸¸ç, È­ÇÐÁßÇÕ
ÇüÀº 0.1 ¸ô ÃÊ»ê¼ö¿ë¾×¿¡¼­µµ Å©°Ô º¯È­ÇÏ¿´´Ù.
4. 36¡É ¿Í 60¡É¿¡¼­ ó¸®ÇÑ È­ÇÐÁßÇÕÇü ÄÞÆ÷ÁþÆ® ·¹ÁøÀÇ ¹°¼ºÀº À¯»çÇÏ¿´´Ù.
#ÃÊ·Ï#
Eleven kinds of dental composite resins were used in this study, which were three
chemical curing resins and eight light curing composite resins. The initial polymerization
degree of the light-curing composite resins was controlled by altering the light intensity
of the curing unit. Four different relative light intensities (25, 60, 90, and 100%) were
used. Specimens were aged various conditions ; four different aging periods (1, 7, 14,
and 28 days), four different aging environments (water, artificial saliva, ethanol, and 0.1
M acetic acid solution), and two different aging temperatures (36 and 60¡É). Then,
compressive strength and fracture toughness were measured by using Instron Testing
Machine. Solubility and absorption of water were evaluated by measuring the weight
changes.
From the experiment, the following results were obtained :
1. In light-curing composite resins, the higher relative light intensity used for curing,
the higher compressive strength, fracture toughness, and solubility resistance were
observed.
2. The highest compressive strength was obtained with the groups of aged in air, the
highest fracture toughness was obtained with the groups of aged in 0.1 M acetic acid
solution, and the highest solubility was obtained with the groups of aged in ethanol.
3. The groups aged in ethanol showed significant variation on compressive strength
with increasing of aging period. Aging treatment in 0.1 M acetic acid solution gave rise
to significant effect on compressive strength for the chemical-cured composite resins.
4. In chemical-curing composite resins, no significant difference was observed between
groups aged in 36¡É and groups aged in 60¡É.

Å°¿öµå

composite resin; light intensity; aging; organic solution; physical properties;

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