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TEMPERATURE CHANGE IN THE PULP ACCORDING TO POLISHING CONDITION OF VARIOUS RESTORATIVE MATERIALS

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Abstract

¼öº¹¹°ÀÇ ¿¬¸¶ÀÇ Á߿伺¿¡ ´ëÇÏ¿© ¸¹Àº ¿¬±¸µéÀÌ ÀÌ·ç¾îÁ® ¿ÔÀ¸¸ç, ÀÌ´Â ¼öº¹¹°ÀÇ ±Ý¼Ó¼ºÁúÀÇ °³¼±, º¯¿¬ÀûÇÕ¼ºÀÇ Áõ°¡ ±×¸®°í Ä¡ÅÂÃàÀûÀÇ °¨¼Ò µîÀ» ÀÌÀ¯·Î ½ÃÇàµÈ´Ù. ±×·¯³ª ºÒÇàÇÏ°Ôµµ ¼öº¹¹°¿¡ ´ëÇÑ ¿¬¸¶½Ã ¿­ÀÇ ¹ß»ýÀ¸·Î ÀÎÇÏ¿© Ä¡¼öºÎÀ§¿¡ ¼Õ»óÀ» ÃÊ·¡ÇϹǷΠ¿­ÀÇ ¹ß»ýÀ» ÃÖ¼ÒÈ­ÇÏ·Á´Â ³ë·ÂÀÌ µÚµû¶ó¾ß ÇÒ °ÍÀÌ´Ù.
ÀÌ¿¡ º» ¿¬±¸¿¡¼­´Â ¼öº¹¹°ÀÇ ¿¬¸¶½Ã ȸÀü¼ÓµµÀÇ Â÷ÀÌ, ³Ã°¢Á¦ÀÇ Àû¿ë À¯¹«, ¿©·¯ Á¾·ùÀÇ ¼öº¹¹°ÀÇ Â÷ÀÌ, °£ÇæÀûÀÎ ¿¬¸¶¿Í ¿¬¼ÓÀûÀÎ ¿¬¸¶ÀÇ Â÷ÀÌ ±×¸®°í ÀÜÁ¸ »ó¾ÆÁúÀÇ µÎ²²ÀÇ Á¤µµ¿¡ µû¸¥ Ä¡¼ö³»ºÎ¿¡¼­ÀÇ ¿­ÀÇ º¯È­¸¦ ¾Ë¾Æº¸±â À§ÇÏ¿© ¹ß°ÅµÈ ±¸Ä¡¿¡ 5±Þ ¿Íµ¿À» Çü¼ºÇÑ ÈÄ º¹ÇÕ·¹Áø(Z100, 3M co), resin-modified GIC(Dyract, Fuji¥± LC) ±×¸®°í ¾Æ¸»°¨(Degussa) µîÀ¸·Î ÃæÀüÇÏ¿´À¸¸ç, ´Ù¾çÇÑ Á¶°Ç¿¡¼­ÀÇ ¿¬¸¶¸¦ ½ÃÇà, Ä¡¼ö³»ºÎ¿¡¼­ÀÇ ¿­ÀÇ º¯È­¸¦ ÃøÁ¤ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. AmalgamÀ» °ÇÁ¶ÇÑ »óÅ¿¡¼­ ¿¬¸¶½Ã ´Ù¸¥ Àç·á¿¡ ºñÇØ °¡Àå Å« Ä¡¼ö³» ¿Âµµ »ó½ÂÀ» º¸¿´´Ù(P<0.05). ±×·¯³ª, Z1OO, Dyract, Fuji¥± LC °£¿¡´Â °£ÇæÀû ¼öº¹¹° ¿¬¸¶¿Í ¿¬¼ÓÀûÀÎ ¼öº¹¹° ¿¬¸¶ ¸ðµÎ ¾î¶² °æ¿ìµç À¯ÀÇÂ÷°¡ ¾ø¾ú´Ù(P>0.05).
2. °°Àº Á¶°ÇÀ¸·Î ¿¬¸¶¸¦ ½ÃÇàÇßÀ» ¶§, °£ÇæÀûÀÎ ¿¬¸¶º¸´Ù ¿¬¼ÓÀûÀÎ ¿¬¸¶¸¦ ÇÑ °æ¿ì°¡ Ä¡¼ö³» ¿Âµµ°¡ ´õ Å©°Ô »ó½ÂÇÏ¿´´Ù(P<0.01).
3. ¾Æ¸»°¨°ú Dyract¿¡ À־´Â ÀÜÁ¸ »ó¾ÆÁúÀÇ Â÷ÀÌ¿¡ µû¸¥ Ä¡¼ö³» ¿Âµµº¯È­¿¡ À¯ÀÇÇÑ Â÷À̸¦ º¸¿´À¸³ª(P<0.01), Fuji¥± LC¿¡ À־´Â À¯ÀǼºÀÌ ¾ø¾ú´Ù(P>0.05).
4. ³Ã°¢Á¦ÀÇ À¯¹«¿¡´Â °ü°è¾øÀÌ ¾î¶² °æ¿ìµç ½Ã°£¿¡ µû¸¥ ¿Âµµ »ó½ÂÀ» º¸¿´´Ù. ±×·¯³ª, ³Ã°¢Á¦¸¦ »ç¿ëÇÑ °æ¿ì°¡ ³Ã°¢Á¦¸¦ »ç¿ëÇÏÁö ¾ÊÀº °æ¿ì¿¡ ºñÇØ ¿Âµµ »ó½Â°ªÀÌ ÈξÀ ÀÛ¾Ò´Ù(P<0.01).

The importance of finishing and polishing the restoration has been described by several authors. The final step provides for improved metallurgical properties, better marginal adaptation, reduced plaque accumulation. Unfortunately, finishing of the restorations can produce damage from tem¡©perature rises at the pulpal wall.
The aim of this study was to determine the changes in temperature can be occurred during the use of finishing and polishing instruments under a variety of conditions. ; with or without a wa¡©ter coolant, intermittent or continuous operation, high or low rotation speed, remaining dentin thickness, and various restorative materials.
Class V preparations were cut on extracted molars and restored with composite resin(Z 100), resin-modified glass ionomer cements(Dyract, Fuji II LC), and amalgam. Finishing was done with aluminum oxide coated disc(Sof-lex¢ç polishing disc, 3M, USA).
The following results were obtained.
1. The rise of temperature during polishing of amalgam restorations was the highest among the all experimental groups except polishing with water coolant (P(0.05) . However, there were no statistical differences in temperature rises between Z 100, Dyract and Fuji II LC (P)0.05).
2. The intrapulpal temperature was greatly influenced by the applied time, and intermittent pol¡©ishing was showed significantly lower temperature rises than continuous polishing(p<0.01).
3. The intrapulpal temperature was increased according to the application of polishing regard¡©less -of using water coolant. However, polishing with water coolant showed significant) lo er temperature in the pulp than not used water coolant(P(0.01).

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