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Dimensional Changes of Dental Impression Materials by Thermal Changes

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Abstract

°á·Ð
Àλóäµæ½ÃÀÇ ¿ÂµµÀÎ 37¡É¿Í ¸ðÇüÀç ÁÖÀԿµµÀÎ 23¡É »çÀÌÀÇ ¿Âµµº¯È­¿¡ ÀÇÇÑ ÀλóÀçÀÇ
Å©±âº¯È­¸¦ ¾Ë¾Æº¸±â À§ÇÏ¿© Imprint(IM, 3M Co.), Examix(EM, GC Co.), Extrude(ET,
Kerr Co.), Contrast(CT, Voco Co.),Perfect(PF, Hankook JP Co.)µî 5Á¾ÀÇ ºÎ°¡ÁßÇÕÇü ½Ç¸®
ÄÜ °í¹« ÀλóÀ縦 ¼±ÅÃÇÏ¿© ¿­¿ªÇкм®±â·Î °¢ ÀλóÀçÀÇ ¿­ÆØâ°è¼ö¸¦ ÃøÁ¤ÇÏ°í ½ÇÁ¦ Àλó
¿¡¼­ ¹ÌÄ¥ ¼ö ÀÖ´Â ¿µÇâÀ» ¿¹ÃøÇϱâ À§ÇÏ¿© °¡»óÀûÀÎ Ä¡¾Æ¿Í Æ®·¹ÀÌÀÇ ¸ðµ¨À» ¼³Á¤ÇÏ°í °è
»êÇÑ °á°ú ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ¿­ÆØâ·üÀº CT, PF, EM, EX, IF ¼øÀ¸·Î ÀÛ¾ÒÀ¸¸ç À̵é Áß CT¿Í PF, EM°ú EX, EX
¿Í IM »çÀÌ¿¡´Â À¯ÀÇÇÑ Â÷°¡ ¾ø¾ú´Ù(p<0.05).
2. °°Àº ¿­ÆØâ·üÀ» °®´Â ÀλóÀç¶óµµ ±¸Ä¡ºÎº¸´Ù ÀüÄ¡ºÎ¿¡¼­ ´õ Å« ±æÀ̺¯È­·®À» º¸¿´´Ù.
3. °¡»ó¸ðµ¨À» ÀÌ¿ëÇÑ ºÐ¼® °á°ú ÀüÄ¡ºÎÀÇ °æ¿ì ¸ðµç ÀλóÀç¿¡¼­ 40§­ÀÌ»óÀÇ ±æÀ̺¯È­·®
À» º¸¿´À¸¸ç, ±¸Ä¡ºÎÀÇ °æ¿ì ¸ðµç ÀλóÀç¿¡¼­ 40 §­ÀÌÇÏÀÇ º¯È­·®À» º¸¿´´Ù.
ÀÌ»óÀÇ °á°ú·Î ÀλóÀç¿¡ µû¶ó ¿­ÆØâ·üÀÇ À¯ÀÇÇÑ Â÷ÀÌ°¡ ÀÖÀ¸¸ç µ¿ÀÏ ÀλóÀç¶óµµ ÀλóºÎ
À§¿¡ µû¶ó º¯¿¬ÀûÇÕ¼ºÀÇ Â÷ÀÌ°¡ ÀÖÀ¸¹Ç·Î ÀüÄ¡ºÎ Àλóäµæ½Ã ´õ Ưº°ÇÑ ÁÖÀÇ°¡ ¿ä±¸µÊÀ» ¾Ë
¼ö ÀÖ¾ú´Ù.
#ÃÊ·Ï#
Dental impression materials are necessary for prosthodontic treatment and should have
some desirable properties that easy to use, reprocuctibility to oral tissue, dimensional
stability and compatibility to gypsum materials and additional silicone impression
materials are used mostly. All materials have dimensional charge by thermal changes.
So, impression materials shrink during cooing from oral temperature(37¡É) to room
temperature(23¡É). 5 kinds of light body of addition silicone materials(Imprint ¥±(IM), 3M
Co., USA; Examix(EX), GC Co., Japan; Extrude(EX), Kerr Co., USA; Contrast(CT),
Voco Co., Germany; Perfect(PF), Hankook JP, Korea) were chosen and the cylinderical
specimens(6 §® dia., 12§® height)were made and thermal expansion were measured by
thermomechanical analyzer(TMA 2940, TA Instrument, U.S.A.) between 23¡É and 37¡É.
The data were analyzed by Mann Whitney U-Test.
The results were as follows:
1. Thermal expansions of impression materials were increased in order to CT>PF)
EM>EX¡ÃIM(p<0.05).
2. Anterior area had more dimensional change than posterior area in same impression
materials.
In conclusion, thermal expansions of impression materials were significantly different
from each other(p<0.05), and anterior area had more dimensional change than posterior
area in same impression materials.

Å°¿öµå

impression materials; dimensional change; thermal change;

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