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Evaluation of Dental Ceramics Using Light Curing Molding Liquids

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Abstract

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À» ¹®Áö¸¦ ¶§ ¸¶¸êÀÌ ÀϾ´Ù.
2. ½ÃÇ豺ÀÇ ¼Ò¼º¼öÃà·üÀº (12.06¡¾1.26)£¥À¸·Î ´ëÁ¶±ºÀÇ ¼Ò¼º¼öÃà·ü (15.41¡¾1.09)£¥º¸´Ù
À¯ÀÇÇÏ°Ô ³·¾Ò´Ù (p<0.05).
3. ½ÃÇ豺ÀÇ 3Á¡±ÁÈû°­µµ´Â (69.12¡¾2.32) §ç·Î ´ëÁ¶±ºÀÇ 3Á¡±ÁÈü°­µµ (77.35¡¾8.86) §çº¸´Ù
À¯ÀÇÇÏ°Ô ³·¾Ò´Ù(p<0.05).
4. ½ÃÇ豺ÀÇ L*°ª°ú a*°ªÀº ´ëÁ¶±º¿¡ ºñÇØ À¯ÀÇÇÏ°Ô ³ô¾Ò°í
(p.<0.05), b*°ªÀº À¯ÀÇÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù (p>0.05).
ÀÌ»óÀÇ °á°ú·Î ±¤ÁßÇÕÇü ¼ºÇü¾×À» ÀÌ¿ëÇÑ ¼¼¶ó¹ÍÀÇ ¼ºÇü°ú °æÈ­°¡ °¡´ÉÇÏ¿´°í °­µµ¸¦ º¸
°­ÇÒ ¼ö ÀÖ´Â ¹æ¹ýÀ» Ãß°¡·Î Àû¿ëÇÑ´Ù¸é ½É¹Ì¼ºÀÌ Áß¿äÇÏÁö ¾ÊÀ¸¸é¼­ ¼Ò¼º¼öÃàÀÌ Àû¾î¾ß ¿ì
¼öÇÑ ¼¼¶ó¹Í ÄھƿëÀ¸·Î »ç¿ëÀÌ °¡´ÉÇÒ °ÍÀÌ´Ù.
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The molding technique of dental ceramics are very important. Because dental ceramics
are purchased with powder state, they must be mixed with adhesive liquids or water for
plasticized materials. The procedures to mix with liquids, condense and build up were
very careful and mechanical properties of dental ceramics were closely related with
them. If it will be possible to use of light curing liquids, molding procedures will be
easier than using water. To evaluate the physical properties of dental ceramics using
light curing molding liquids, light curing liquids were made with triethylene glycol
dimethacrylate(balance), camphoroquinone(1£¥) and ethyldimethylaminobenzoate (1£¥) and
one type of dental ceramics(Ceradent, Ssangyong Co., Taegu, Korea) was chosen(A3
dentin). The specimens were formed in mold(25¡¿5¡¿3 §®) using light curing liquid for
experimental group(LC) and using distilled water for control group(CO). LC were light
cured and air-fired for elimination of organic materials and CO were vacuum fired.
Sintering shrinkage was measured by measuring microscope(Measuroscope ¥±, Nikon
Co., Tokyo, Japan), 3-point flexural strength was measured by universal testing
machine(Instron 6022, Instron Co., High Wycomb, U.K.), and color was measured
according to CIEL*a*b* system by
spectrophotometer(Minolta 3500D, Minolta Co., Osaka, Japan). The results were analyzed
by Wilcoxon Rank Sum Test. Sintering shrinkage and flexural strength of LC lower
than CO(p<0.05). But they were acceptable to standards of ISO specification:6872.
L*, a* values of LC had higher than those of CO(p<0.05),
but b*value of LC had no significance compared with CO(p>0.05) and ¡âE
was 26.7. The application of light curing liquids for molding liquids of dental ceramics
was considerable, especially core materials, because of color changes.

Å°¿öµå

color; dental ceramic; flexural strength; light curing; molding liquid; shrinkage;

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