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A STUDY ON THE PHYSICAL PROPERTIES OF RESTORATIVE MATERIALS FOR PHOTO-POLYMERIZATION OF ARGON LASER

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Abstract

°á·Ð
±¤ÁßÇÕÇü º¹ÇÕ ·¹Áø ¼öº¹ÀçÀÎ Z-100°ú polyacidmodified resin composite·Î ºÒ¸®´Â ÄÞÆ÷¸Ó
ÀÎ DyractÀÇ °¡½Ã±¤¼± 40ÃÊ ÁßÇÕ°ú 0.5W Ãâ·Â ¾Æ¸£°ï ·¹ÀÌÀú 5ÃÊ ¹× 10ÃÊ ÁßÇÕ¿¡¼­ ¾ÐÃà°­
µµ ÃøÁ¤, Ç¥¸é ¹Ì¼¼°æµµ ÃøÁ¤, µÎ²²¸¦ ´Þ¸®ÇÑ Àç·áÀÇ »óÇϸé°æµµ Â÷À̸¦ ÀÌ¿ëÇÑ ÁßÇÕ ±íÀÌ
Á¤µµ ºñ±³, ÁßÇÕ½ÃÀÇ ¿Âµµ »ó½Â ¹× ÁßÇÕ ¼öÃà·®À» ÃøÁ¤ ºñ±³ÇÏ¿© ´ÙÀ½ÀÇ °á°ú¸¦ ¾ò¾ú´Ù.
1. ¾ÐÃà °­µµ´Â Z-100¿¡¼­ ¾Æ¸£°ï ·¹ÀÌÀú ÁßÇÕ±ºÀÌ °¡½Ã±¤¼± ÁßÇÕ±ºº¸´Ù ³ô¾Ò°í(p<0.05),
Dyiact´Â ¾Æ¸£°ï ·¹ÀÌÀú 5Ãʱº°ú °¡½Ã±¤¼± 40Ãʱº »çÀÌ¿¡´Â À¯ÀÇÀû Â÷ÀÌ°¡ ¾ø¾úÀ¸¸ç, ¾Æ¸£
°ï ·¹ÀÌÀú 10Ãʱº¿¡¼­ µÎµå·¯Áø °¨¼Ò¸¦ º¸¿´´Ù(p<0.05).
2. Ç¥¸é ¹Ì¼¼ °æµµ´Â Z-100ÀÌ ¿ì¼öÇÏ¿´°í(p<0.05), Z-100°ú Dyract ¸ðµÎ °¡½Ã±¤¼± 40Ãʱº
°ú ¾Æ¸£°ï ·¹ÀÌÀú 10Ãʱº »çÀÌ¿¡ À¯ÀÇÀû Â÷ÀÌ°¡ ¾ø¾ú´Ù.
3. ÁßÇÕ ±íÀÌ ¿¬±¸´Â Z-100ÀÇ °æ¿ì ·¹ÀÌÀú ÁßÇÕ±ºÀÌ µÎ²²º° »óÇÏ °æµµ °¨¼Ò·®ÀÇ Â÷ÀÌ°¡
¾ø¾î¼­, ÀÏ°üµÈ ÁßÇÕÀÇ °æÇâÀ» º¸¿´Áö¸¸, µÎ²²¸¦ ÅëÁ¦ (control)ÇÏ¿© ºñ±³ÇÑ °á°ú´Â ·¹ÀÌÀú
ÁßÇÕ±º°ú °¡½Ã±¤¼± ÁßÇÕ±º °£¿¡ À¯ÀÇÀû Â÷ÀÌ°¡ ¾ø¾ú°í, Dyract´Â ·¹ÀÌÀú ÁßÇÕº¸´Ù °¡½Ã±¤¼±
40ÃÊ¿¡¼­ ÁßÇÕÀÌ ¿ì¼öÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù(p<0.05).
4. ÁßÇսà ¿Âµµ »ó½ÂÀº Z-100ÀÌ ´õ ³ô¾Ò°í(p<0.05), ±¤Á¶»ç ½Ã°£¿¡´Â À¯ÀÇÀû Â÷ÀÌ°¡ ¾ø¾ú
´Ù.
5. ÁßÇÕ ¼öÃà ÃøÁ¤¿¡¼­´Â Àç·á°£ÀÇ À¯ÀÇÀû Â÷ÀÌ´Â ¾ø¾ú°í, ·¹ÀÌÀú 5Ãʱº¿¡¼­ ÁßÇÕ ¼öÃàÀÌ
°¡Àå ÀÛ¾Ò°í(p<0.05), ·¹ÀÌÀú 10Ãʱº°ú °¡½Ã±¤¼± 40Ãʱº »çÀÌ¿¡´Â À¯ÀÇÀû Â÷ÀÌ°¡ ¾ø¾ú´Ù.
ÀÌ»óÀ¸·Î Z-100Àº Áø·á ½Ã°£ÀÇ ´ÜÃàÀ¸·Î ·¹ÀÌÀú ÁßÇÕÀÌ ¿ì¼öÇÏ°í, ¹Ý¸é¿¡ Dyract´Â °¡½Ã
±¤¼± ÁßÇÕÀÌ ¿ì¼öÇÑ °ÍÀ¸·Î »ç·áµÈ´Ù.
#ÃÊ·Ï#
The purpose of this study is to evaluate and compare the results of argon laser for 5
seconds, argon laser for 10 seconds, and visible light for 40 seconds
photo-polymerization in compressive strength, microhardness, curing depth, temperature
rising during polymerization, and polymerization shrinkage. Hybrid type composite
resin(Z-100) and compomer(Dyract) were used to be compared.
The comparessive strength was measured by an Instron(1 §®/min cross head speed)
in 60 specimens and the microhardne
ss of the surface was expressed by Vickers
Hardness Number(VHN) in 30 specimens. The curing depth was evaluated comparing
the different values of upper and lower VHN according to irradiation time and thickness
for the light source polymerization in 60 specimens. The temperature rising during
photopolymerization was observed by the temperature changer with thermocouple
sensitizxer beneath 40 specimens at the argon laser for 10 seconds and visible light 40
seconds irradiation. The polymerization shinkage was evaluated by calculationg the
decrease of % volume by using a dilatometer in 30 specimens.
The results were as follows ;
1. In the case of compressive strength, the argon laser polymerization groups were
higher than visible light group in Z-100(p<0.05). In Dyract, the argon laser 5 seconds
group did not show a significant difference with the visible light 40 seconds group. The
argon laser 10 seconds group showed the markedly low value when compared with
other groups(p<0.05)
2. In microhardness, Z-100 was better than Dyract when comparing by VHNs
(p<0.05); however, there was not a significant difference between two materials in the
visible light 40 seconds group and the argon laser 10 seconds group.
3. In the study of curing depth, Z-100 showed the consistent polymerization in argon
laser irradiation because there was no difference in the VHN decrease according to the
thickness change. Over the thickness control, the results did not show a significant
difference between visible light and argon laser group in Z-100 ; however, in the case
of Dyract, the visible light 40 seconds group was better than the argon laser
groups(p<0.05).
4. There was a significant difference between the two materials in temperature rising
during polymerization(p<0.05), but not a significant difference between irradiation times.
5. There was not a significant difference between the two materials in polymerization
shrinkage. The argon laser 5 seconds group was smaller than the other groups (p<0.05).
It could be concluded that Z-100 polymerization was recommended to use the argon
laser for reduction of the irradiation time while Dyract was recommended to use the
visible light polymerization.

Å°¿öµå

composite; compomer; argon laser; visible light; polymerization;

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