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The Effect of Sulfuric Acid Concentration on Calcium Sulfate Dihydrate Crystal Morphology and Bond Strength between Enamel and Composite Resin in Crystal Growth Method

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Abstract

°á·Ð
Ȳ»ê ¼ö¿ë¾×À¸·Î ¹ý¶ûÁú Ç¥¸éÀ» ó¸®ÇÏ¿© º¹ÇÕ ·¹Áø°úÀÇ Àü´Ü °áÇÕ °­µµ¸¦ ÃøÁ¤ÇÑ °á°ú
0.1M¿¡¼­ ÃÖ´ëÀÇ °áÇÕ °­µµ¸¦ ³ªÅ¸³»¾ú°í Ȳ»ê ³óµµ°¡ Áõ°¡ÇÔ¿¡ µû¶ó 0.3M±îÁö´Â °áÇÕ °­
µµ°¡ °¨¼ÒÇÏ¿´°í 0.4M¿¡¼­ 0.6MÀÇ ¹üÀ§¿¡¼­´Â °áÇÕ °­µµ¸¦ ³ªÅ¸³»Áö ¸øÇÏ¿´À¸¸ç 0.7M ÀÌ
ÈÄ·Î °áÇÕ °­µµ°¡ ¼­¼­È÷ Áõ°¡ÇÏ¿´´Ù.
ÁÖ»ç ÀüÀÚ Çö¹Ì°æ °üÂû °á°ú, 0.1M ³óµµ¿¡¼­´Â ºÎ½Ä¸¸ ÀϾ¸ç 0.2M¿¡¼­ ÃÖÃÊ·Î
gypsum °áÁ¤ÀÌ Çü¼ºµÇ¾ú°í, 0.3MºÎÅÍ´Â ¹ý¶ûÁúÀ» ¿ÏÀüÈ÷ ÇǺ¹ÇÏ¿´´Ù. Ȳ»ê³óµµ°¡ Áõ°¡ÇÔ¿¡
µû¶ó °áÁ¤ »ý¼º¾çÀº Áõ°¡Çϸç, °áÁ¤ÀÇ ±æÀ̴ ª¾ÆÁö°í ¹è¿­Àº ¹«Áú¼­ÇØÁ³´Ù. °áÁ¤ÀÌ ¹ý¶ûÁú
À» ¿ÏÀüÈ÷ ÇǺ¹ÇÏ´õ¶óµµ °áÁ¤ÀÇ ÇÙ¸¸ÀÌ ¹ý¶ûÁú°ú °áÇյǹǷΠ0.4M¿¡¼­ 0.6MÀÇ ¹üÀ§¿¡¼­ °á
ÇÕ °­µµ´Â ¸Å¿ì ³·¾Ò´Ù. 0.7M ÀÌÈÄ·Î °áÇÕ °­µµ°¡ Áõ°¡ÇÏ´Â °ÍÀº Ȳ»ê ³óµµ°¡ Áõ°¡ÇÔ¿¡ µû
¶ó ÇÙ »ý¼º ¼Óµµ°¡ Áõ°¡Çϱ⠶§¹®À¸·Î Çؼ®µÈ´Ù.
°áÁ¤ ¼ºÀå ¹æ¹ý¿¡¼­ °áÇÕ °­µµ¸¦ Çâ»ó½ÃÅ°±â À§Çؼ­ °áÁ¤À» ¹ý¶ûÁú¿¡ °ß°íÈ÷ ºÎÂø½ÃÅ°°Å
³ª ÇÙ »ý¼º ¼Óµµ¸¦ Á¦¾îÇÒ ¼ö ÀÖ´Â ¹°ÁúÀÇ Ã·°¡¿¡ ´ëÇÑ ¿¬±¸°¡ °è¼Ó ¼öÇàµÇ¾î¾ß ÇÒ °ÍÀ¸·Î
»ç·áµÈ´Ù.
#ÃÊ·Ï#
The calcium sulfate dihydrate(gypsum) crystal morphology on enamel surface treated
by sulfuric acid aqueous solution(from 0.1M to 1.0M was observed by scanning electron
microscope. The shear bond strength between enamel and composite resin was measured
by universal testing machine.
From the experimental results, the conclusions of this study were; (1) The shear bond
strength between enamel and composite resin was maximum at 0. 1M sulfuric acid. The
shear bond strength was decreased to 0.3M, hardly bonded from 0.4M to 0.6M, and
increased from 0.7M as increasing sulfuric acid concentration. (2) The crystal contents
formed by sulfuric acid were increased, however the length of crystals was shortened
and the arrangement of crystals was disordered as increasing sulfuric acid concentration.
(3) The crystals formed by sulfuric acid aqueous solution were not firmly bonded on
enamel surface because only crystal nuclei were attached on enamel, so fracture was
occurred between enamel and crystal interface.

Å°¿öµå

composite resin; crystal growth method; enamel; shear bond strength; sulfate ion;

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