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C-factor¿Í ÃæÀü¹ýÀÌ º¹ÇÕ·¹ÁøÀÇ ÁßÇÕ ¼öÃà¿¡ ÀÇÇÑ Ä¡Áú¿¡¼­ÀÇ ¼öÃà ÀÀ·Â¿¡ ¹ÌÄ¡´Â ¿µÇâ

EFFECT OF C-FACTOR AND LAYERING TECHNIQUE ON THE CONTRACTION FORCE OF COMPOSITE RESIN RESTORATION TO TOOTH SURFACE

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À̺À±Ô ( Lee Bong-Kyu ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
À̳­¿µ ( Lee Nan-Young ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
ÀÌ»óÈ£ ( Lee Sang-Ho ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

ÃÊ·ÏÀÌ ÀÖ½À´Ï´Ù.
¿Íµ¿ Çü¼º½Ã C-factor¿Í ÃæÀü¹æ¹ýÀÌ º¹ÇÕ·¹Áø ¼öº¹¹°¿¡¼­ÀÇ ¼öÃà ÀÀ·Â¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Æò°¡ÇÏ°íÀÚ ¹ß°ÅµÈ ¼Ò±¸Ä¡¸¦ ´ë»óÀ¸·Î C-factor°¡ 3.6°ú 1.0ÀÎ ¿Íµ¿À» °¢°¢ Çü¼ºÇÑ ÈÄ hybridÇü º¹ÇÕ·¹ÁøÀÎ Filtek Z-250¢â(3M ESPE, U.S.A.)°ú flowableÇü º¹ÇÕ·¹ÁøÀÎ Filtek flow¢â(3M ESPE, U.S.A.)¸¦ »ç¿ëÇÏ¿© layeringÀ» ½ÃÇàÇÏ°í ±¤ÁßÇÕÇϸ鼭 strain gauge¹ýÀ» ÀÌ¿ëÇÏ¿© Ä¡Áú¿¡¼­ÀÇ ¼öÃà ÀÀ·ÂÀ» ÃøÁ¤ÇÏ¿´´Ù. ½ÃÆíÀ» Àý´ÜÇÏ¿© ·¹Áø°ú »ó¾ÆÁú »çÀÌ °è¸éÀÇ Á¢Âø»óŸ¦ ÁÖ»çÀüÀÚÇö¹Ì°æÀ¸·Î °üÂûÇÑ °á°ú ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.

1. C-factor¿¡ µû¸¥ ¼öÃà ÀÀ·ÂÀ» ÃøÁ¤ÇÑ °á°ú C-fator°¡ 3.7ÀÎ Á¦ 1±º°ú Á¦ 2±º, ±×¸®°í Á¦ 5±ºÀÌ 900ÃÊ ÈÄ °¢°¢ 0.11, 0.07, 0.07 MPa·Î C-factor°¡ 1.0ÀÎ Á¦ 3±º°ú Á¦ 4±ºÀÇ 0.05¿Í 0.04MPa¿¡ ºñÇØ Å©°Ô ³ªÅ¸³µ´Ù(P<0.05). 1,800ÃÊÈÄ¿¡´Â Á¦ 1±º, Á¦ 5±º, Á¦ 2±º, Á¦ 3±º, Á¦ 4¼øÀ¸·Î Å©°Ô ³ªÅ¸³µÀ¸³ª Á¦ 2±º°ú Á¦ 3±º, ±×¸®°í Á¦ 3±º°ú Á¦ 4±º »çÀÌ¿¡´Â À¯ÀǼºÀÌ ¾ø¾ú´Ù.

2. Àç·á¿¡ µû¸¥ ¼öÃà ÀÀ·ÂÀÇ Â÷ÀÌ´Â C-factor°¡ 3.7ÀÎ ¿Íµ¿ÀÇ °æ¿ì hybridÇü ·¹ÁøÀÎ Filtek Z-250¢âÀÌ flowable ·¹ÁøÀÎ Filtek flow¢â¿¡ ºñÇØ ¼öÃà ÀÀ·ÂÀÌ Å©°Ô ³ªÅ¸³µÀ¸³ª(P<0.05), C-factor°¡ 1.0ÀÎ ¿Íµ¿ÀÇ °æ¿ì Àç·áÀÇ Â÷ÀÌ¿¡ µû¸¥ ¼öÃàÀÀ·ÂÀÇ À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù.

3. Layering¿¡ µû¸¥ ¼öÃà ÀÀ·ÂÀº Filtek Z-250¢âÀ» layering ¾øÀÌ bulk ÃæÀüÇÑ Á¦ 1±º¿¡ ºñÇØ flowable ·¹ÁøÀ» layering ÇÑ Á¦ 5±ºÀÌ Àü ÃøÁ¤ ½Ã°£´ë¿¡ °ÉÃÄ ¼öÃà ÀÀ·ÂÀÌ À¯ÀÇÇÏ°Ô ³·°Ô ³ªÅ¸³µ´Ù.(P<0.05).

4. C-factor°¡ 3.7ÀÎ Á¦ 1±º°ú Á¦ 2±º, Á¦ 5±ºÀº 900ÃÊ°¡Áö ¼öÃà ÀÀ·ÂÀÌ Áõ°¡ÇÏ´Ù ÀÌÈÄ Á¡Â÷ °¨¼ÒÇÏ´Â °æÇâÀ» º¸¿´´Ù.

5. C-factor°¡ 1.0ÀÎ ¿Íµ¿ÀÇ °æ¿ì ÃæÀü¿ë ·¹Áø Á¾·ù¿¡ °ü°è¾øÀÌ ·¹Áø°ú ¿Íµ¿º® »çÀÌ¿¡ ±ä¹ÐÇÑ Á¢Âø »óŸ¦ º¸¿´À¸³ª C-factor°¡ 3.7ÀÎ ¿Íµ¿ÀÇ °æ¿ì ºÎºÐÀûÀ¸·Î Æ´ÀÌ °üÂûµÇ¾ú´Ù. Àü¹ÝÀûÀ¸·Î ¿Íµ¿Àú¿¡ ºñÇØ ¿Íµ¿º®¿¡¼­ Æ´ÀÌ ´õ ¸¹ÀÌ °üÂûµÇ¾ú´Ù.

ÀÌ»óÀÇ °á°ú¸¦ Á¾ÇÕÇÏ¿© º¸¸é º¹ÇÕ·¹Áø ¼öº¹½Ã ¼öÃà ÀÀ·Â¿¡ µû¸¥ ÇÕº´ÁõÀ» ¿¹¹æÇϱâ À§ÇØ C-factor¸¦ Å©Áö ¾Ê°Ô ¿Íµ¿À» ¼³°è, Çü¼ºÇÏ¿©¾ß Çϸç C-factor°¡ Ŭ °æ¿ì flowable ·¹ÁøÀ» ÀÌÀåÇÏ´Â µî Àç·áÀûÀÎ ¸é¿¡¼­ÀÇ ¼±Åðú Àû¿ë¹ýÀÌ Áß¿äÇÒ °ÍÀ¸·Î »ç·áµÈ´Ù.

The aim of this study was to investigate the relationship between the C-factor and shinkage strain values of composite resin and examine the strain values in different incremental filling techniques. Experiment consisted two aims. First, we compared with strain value in two different C-factors(3.7 and 1.0). Second, we examined the strain values in three different filling techniques.

The results of the present study can be summarized as follow:

1. High C-factor groups showed higher contraction stress values than low C-factor groups at 900 sec after polymerization.

2. Hybrid resion showed higher contraction stress values than flowable resin in high C-factor cavities. But contraction stress was not revealed signivicant difference between hybrid resin and flowable resin in low C-factor cavities(P>0.05).

3. Bulk filling with hybrid resin(Group 1) showed high contraction stress and lining with flowable resin followed hybrid resin(Group 5) showed lower contraction stress.

4. Contraction stress were increased during 900 sec after polymerization in high C-factor groups but decreased gradually after 900 sec.

5. Low C-factor groups showed tight marginal seal between resin and cavity wall but high C-factor groups showed gaps formed between resin and cavity wall in part.

On the basis above results, layering techniques in high C-factor cavity showed abvantages in reducing contraction stress and gap formation between cavity wall and resin restoration.

Å°¿öµå

º¹ÇÕ·¹Áø;±¤ÁßÇÕ;C-factor;ÁßÇÕ ¼öÃà;¼öÃà ÀÀ·Â
Composite resin;Light curing;C-factor;Polymerization shinkage;Contraction stress

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