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Bulk-base º¹ÇÕ ·¹ÁøÀÇ ÁßÇÕ ±íÀÌ¿¡ µû¸¥ ¹Ì¼¼°æµµ Æò°¡

Evaluation of Microhardness of Bulk-base Composite Resins According to the Depth of Cure

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³ëÀ¯¹Ì, ½Åºñ¼Ö, ±èÁ¾¼ö, À¯½ÂÈÆ,
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³ëÀ¯¹Ì ( No Yoo-Mi ) - ´Ü±¹´ëÇб³ Ä¡ÀÇÇаú ¼Ò¾ÆÄ¡°úÇб³½Ç
½Åºñ¼Ö ( Shin Bi-Sol ) - ´Ü±¹´ëÇб³ Ä¡ÀÇÇаú ¼Ò¾ÆÄ¡°úÇб³½Ç
±èÁ¾¼ö ( Kim Jong-Soo ) - ´Ü±¹´ëÇб³ Ä¡ÀÇÇаú ¼Ò¾ÆÄ¡°úÇб³½Ç
À¯½ÂÈÆ ( Yoo Seung-Hoon ) - ´Ü±¹´ëÇб³ Ä¡ÀÇÇаú ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

º¹ÇÕ ·¹ÁøÀº ¼Ò¾ÆÄ¡°ú ¿µ¿ª¿¡¼­ ´ëÁßÀûÀ¸·Î »ç¿ëµÇ´Â Àç·á°¡ µÇ¾ú´Ù. ÇÏÁö¸¸ º¹ÇÕ ·¹ÁøÀº ÁßÇÕ ¼öÃàÀ» ÃÖ¼ÒÈ­Çϱâ À§ÇÏ¿© ÀûÃþ ÃæÀüÀ» ÇØ¾ß Çϱ⠶§¹®¿¡ ±ä ½Ã¼ú ½Ã°£ÀÌ ÇÊ¿äÇÏ´Ù. ÀÌ·¯ÇÑ ¹®Á¦¸¦ ±Øº¹Çϱâ À§ÇÏ¿© ÀÓ»ó°¡µéÀº bulk-filling Àç·á¿¡ °ü½ÉÀ» µ¹¸®±â ½ÃÀÛÇÏ¿´°í, ÃÖ±Ù bulk-base º¹ÇÕ ·¹ÁøÀÌ »õ·Î Ãâ½ÃµÇ¾ú´Ù. º» ¿¬±¸´Â bulk-base º¹ÇÕ ·¹ÁøÀÇ ±íÀ̺° ¹Ì¼¼°æµµ ÃøÁ¤°ªÀ» ºñ±³, Æò°¡ÇÏ¿´´Ù.

½ÇÇ豺À¸·Î 1Á¾ÀÇ ÀúÁ¡µµ bulk-base º¹ÇÕ ·¹Áø°ú 1Á¾ÀÇ °íÁ¡µµ bulk-base º¹ÇÕ ·¹ÁøÀ» »ç¿ëÇÏ¿´°í ´ëÁ¶±ºÀ¸·Î 1Á¾ÀÇ ÀüÅëÀû º¹ÇÕ ·¹ÁøÀ» »ç¿ëÇÏ¿´´Ù.

°¢ ±íÀ̺° Àç·áµéÀÇ ¹Ì¼¼°æµµ¿¡ ´ëÇÑ °á°ú·Î ´ëÁ¶±ºÀÇ °æ¿ì´Â ÁßÇÕ ±íÀÌ°¡ ±í¾îÁú¼ö·Ï ¹Ì¼¼°æµµÀÇ À¯ÀÇÇÑ Â÷À̸¦ º¸¿´´Ù(p < 0.05). ÀÌ¿¡ ¹ÝÇØ ½ÇÇ豺 ÀÎ HFB´Â 0 mm¿Í 4 mm¿¡¼­, ±×¸®°í MFB´Â 0 mm¿Í 2 mm, 0 mm¿Í 3 mm¿¡¼­ °¢°¢ À¯ÀÇÇÑ Â÷À̸¦ º¸¿´À¸³ª ³ôÀÌ¿¡ µû¸¥ À¯ÀÇÇÑ °¨¼Ò °æÇâÀ» º¸ÀÌÁö´Â ¾Ê¾Ò´Ù.

°¢°¢ÀÇ ±íÀÌ¿¡¼­ ½ÃÆíµéÀÇ ¹Ì¼¼°æµµ¸¦ ºñ±³ÇÏ¿´À» ¶§ Ç¥¸é°ú 2 mm¿¡¼­´Â ´ëÁ¶±ºÀÌ ½ÇÇ豺º¸´Ù Å« ¹Ì¼¼°æµµ¸¦ º¸¿´´Ù(p < 0.05). 3 mm¿¡¼­´Â ÀúÁ¡µµ ½ÇÇ豺ÀÌ ´ëÁ¶±ºº¸´Ù ¹Ì¼¼°æµµ°¡ Å©°Ô ³ª¿ÔÀ¸³ª Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ´Â ¾Æ´Ï¾ú´Ù. ÇÏÁö¸¸ 4 mm¿¡¼­´Â ¸ðµç ½ÇÇ豺ÀÌ ´ëÁ¶±ºº¸´Ù Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô Å« ¹Ì¼¼°æµµ °ªÀ» º¸¿´´Ù(p < 0.05).

À̹ø ½ÇÇèÀ» ÅëÇÏ¿© bulk-base º¹ÇÕ ·¹ÁøÀÌ 4 mm¿¡¼­ ±âÁ¸ÀÇ º¹ÇÕ ·¹Áøº¸´Ù ´õ ³ôÀº ¹Ì¼¼°æµµ¸¦ º¸¿´°í Ç¥¸é°ú 2 mm¿¡¼­´Â ´õ ³·Àº ¹Ì¼¼°æµµ¸¦ º¸ÀÌ´Â °ÍÀ» °üÂûÇÏ¿´´Ù. ±×·¯¹Ç·Î bulk-base ·¹ÁøÀÇ ±â°èÀû ¼ºÁúÀÇ Çâ»óÀ» ÅëÇØ Ç¥¸éÀÇ ³·Àº ¹Ì¼¼°æµµ Ư¼ºÀÌ ±Øº¹µÈ´Ù¸é ¼Ò¾Æ ȯÀÚÀÇ ¼öº¹ Ä¡·á ½Ã Àû¿ëÀÌ °í·ÁµÇ¾î Áú ¸¸ ÇÒ °ÍÀÌ´Ù.

Composite resin becomes an essential material in pediatric dentistry. However, incremental filling of composite resin to minimize the polymerization shrinkage takes time. To reduce the polymerization shrinkage, clinicians and researchers have focused on bulk-filling materials. Bulk-base composite resin is newly introduced as bulk-filling composite resin. The purpose of this study was to evaluate microhardness profile of bulk-base composite resin according to the depth of cure.

A high flow bulk-base material and a low flow bulk-base material were used for experimental group, and a conventional composite resin was used for control group. Each group consist of 20 specimens, 3.5 ¡¿ 3.5 ¡¿ 5.0 mm mold was used to make specimen. Specimens were sectioned at the 2 mm and the 3 mm depth with milling machine. Microhardness profile was measured at the surface, 2 mm depth, 3 mm depth, and 4 mm depth.

Microhardness of control group showed statistically significant difference (p < 0.05) according to the polymerization depth. In contrast, experimental group showed no statistically significant difference, except between 0 mm and 4 mm at HFB, 0 mm and 2 mm, 0 mm and 3 mm at MFB.

At the surface and the 2 mm depth, the control group showed higher microhardness than the experimental groups (p < 0.05). However, at the 4 mm depth, the experimental groups showed significantly higher microhardness (p < 0.05).

The results from this study, the bulk-base composite resin showed higher microhardness at the 4 mm and lower microhardness at the surface and the 2 mm depth. Therefore, if bulk-base resin overcomes the mechanical weakness, it could be considered using in pediatric dentistry.

Å°¿öµå

Bulk-base º¹ÇÕ ·¹Áø; ¹Ì¼¼°æµµ; ÁßÇÕ ±íÀÌ
Bulk-base resin composites;Microhardness;Depth of cure

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