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Effects of Polishing Methods on the Surface Characteristics of Composite Resins

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¹é¹Î°æ, ±èÁ¾Ã¶, Àå±âÅÃ,
¼Ò¼Ó »ó¼¼Á¤º¸
¹é¹Î°æ ( Baik Min-Kyung ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
±èÁ¾Ã¶ ( Kim Chong-Chul ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
Àå±âÅà( Jang Ki-Taeg ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

º» ¿¬±¸´Â º¹ÇÕ·¹ÁøÀÇ ¿¬¸¶¹æ¹ý¿¡ µû¸¥ Ç¥¸éƯ¼ºÀ» Æò°¡Çϱâ À§ÇØ, microhybrid ·¹Áø(FiltekTM Z250)°ú nanofill ·¹Áø(FiltekTM Z350)À» ¿¬¸¶ Àü, abrasive disk(Sof-lex) ¿¬¸¶ ÈÄ, polishing brush(Occlubrush) ¿¬¸¶ ÈÄ·Î ³ª´©¾î ºÐ¼®ÇÏ¿´´Ù. ±× °á°ú ·¹Áø Ç¥¸éÁ¶µµ´Â ¿¬¸¶ ÈÄ Áõ°¡ÇÏ¿´´Âµ¥, ¹Ì¼¼Á¶µµ´Â ¿¬¸¶¹æ¹ý¿¡ µû¸¥ Â÷ÀÌ°¡ ¾ø¾úÀ¸³ª °Å½ÃÁ¶µµ´Â Occlubrush¸¦ ÀÌ¿ëÇÑ °æ¿ì ÇöÀúÇÏ°Ô Ä¿Á³´Ù(p < 0.05). Sof-lex ¿¬¸¶ÀÇ °æ¿ì ·¹ÁøÀÇ filler±îÁö ¿¬¸¶µÇ¾î Ç¥¸éÀÌ º¸´Ù ±ÕÀÏÇÑ Çü»óÀ» º¸¿´À¸³ª Occlubrush ¿¬¸¶½ÃÆíÀº ±âÁúÃþÀÌ ¶â°ÜÁ® ³ª°£ ºÒ±ÕÀÏÇÑ Çü»óÀ» º¸¿´´Ù. µÎ ¿¬¸¶¹æ¹ý °£ÀÇ ¹Ì¼¼°æµµ À¯ÀÇÂ÷´Â ¾ø¾úÀ¸¸ç(p > 0.05), ¿¬¸¶ ÈÄ °æµµ °ªÀÌ ¾à 25% »ó½ÂÇÏ¿´´Ù. °á·ÐÀûÀ¸·Î, º¹ÇÕ·¹ÁøÀÇ Ç¥¸é°æµµ Çâ»óÀ» À§ÇÏ¿© ÀûÇÕÇÑ ¿¬¸¶°¡ ÇÊ¿äÇϸç, Sof-lex¸¦ ÀÌ¿ëÇÑ ¿¬¸¶°¡ ´õ ¿ì¼öÇÑ °ÍÀ¸·Î »ç·áµÈ´Ù.

The aim of this study was to evaluate the surface characteristics of composite resins polished with two different polishing methods. 30 disk-shaped specimens were prepared with microhybrid (FiltekTM Z250) and nanofilled (FiltekTM Z350)
resins respectively, and classified into three groups: not polished as controls, polished by an abrasive disk (Soflex), and polished by a polishing brush (Occlubrush). Surface roughness was increased after polishing. In terms of micro-roughness, there were no significant differences between the two polishing methods. But macro-roughness values were markedly increased in the Occlubrush group (p < 0.05). In the Sof-lex group, the matrix and fillers were polished together, resulting into a smoother and homogeneous surface. However, in the Occlubrush group, the matrix layer was torn off, with more heterogeneous surfaces and large scratches. In regards to micro-hardness, no significant differences were observed between the two polishing systems (p >0.05). And the hardness value increased about 25% after polishing.
In conclusion, the method of polishing should be chosen deliberately in view of the hardness characteristics of composite resins. Sof-lex is recommended to improve the surface characteristics of polished resins.

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º¹ÇÕ·¹Áø; ¿¬¸¶¹æ¹ý; Ç¥¸éÁ¶µµ; Ç¥¸éÇü»ó; ¹Ì¼¼°æµµ
Composite resin; Polishing method; Surface roughness; Surface morphology; Micro-hardness

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