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THE EFFECT OF DIFFERENT FLUTE DESIGN AND TORQUE-CONTROLLED MOTOR ON THE SHAPING ABILITY OF SIMULATED RESIN ROOT CANALS

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Abstract

ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº ´ÏÄÌ-´ÏŸ´½ ÆÄÀÏÀÇ »èÁ¦ ¼ºÇâ°ú ¿£ÁøÀÇ ÅäÅ© Á¶Àý ´É·ÂÀÌ ±Ù°ü ¼ºÇü¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Æò°¡ÇÏ´Â °ÍÀÌ´Ù ·¹Áø ¸ðÇü 40°³¸¦ »ç¿ëÇÏ¿´À¸¸ç, Hero Shaper(R)¿Í Endo-Mate2À» ÀÌ¿ëÇÑ HE±º, Hero Shaper(R)¿Í Tecnika(R)¸¦ ÀÌ¿ëÇÑ HT±º, Profile(R)°ú Endo-Mate2(R)¸¦ ÀÌ¿ëÇÑ PE±º, Profile(R)°ú Tecnika(R)¸¦ ÀÌ¿ëÇÑ PT±ºÀ¸·Î ±¸ºÐÇÏ¿© ±Ù°ü¼ºÇü ÇÏ¿´´Ù. °¢ ±ºº° ±Ù°ü ¼ºÇü ½Ã°£À» ±â·ÏÇÏ¿´´Ù. ±Ù´Ü°øÀ¸·ÎºÎÅÍÀÇ ¼öÁ÷ À̵¿ °Å¸® 1, 3 ±×¸®°í 5mm À§Ä¡¿¡¼­ÀÇ ±Ù°ü »èÁ¦·®, Áß½ÉÀÌ µ¿·üÀ» »êÃâÇÏ¿© ´ÙÀ½ÀÇ °á·ÐÀ» ¾ò¾ú´Ù. 1. ±Ù°ü ¼ºÇü ½Ã°£Àº HT±ºÀÌ °¡Àå »¡¶ú´Ù (p<0.05). 2. »èÁ¦·®Àº 1mmÁöÁ¡¿¡¼­ HE±ºÀÌ PT±ºº¸´Ù ÄÇ°í (p<0.05), 3mmÁöÁ¡¿¡¼­´Â PT±ºÀÌ ´Ù¸¥ ±ºµéº¸´Ù ÀÛ¾Ò´Ù (p<0.05). 5mm¿¡¼­´Â PE±ºÀÌ PT±ºº¸´Ù ÄÇ´Ù (p<0.05). 3. Á᫐ À̵¿·üÀº 1mm ÁöÁ¡¿¡¼­ HE±ºÀÌ ´Ù¸¥ ±ºµéº¸´Ù ÄÇÀ¸¸ç (p<0.05), 5mm¿¡¼­´Â HT±ºÀÌ PE±º°ú PT±ºº¸´Ù ÄÇ´Ù (p<0.05). µû¶ó¼­ ÅäÅ© Á¶ÀýÀÌ µÇ´Â ¿£ÁøÀ» »ç¿ëÇÏ´Â °ÍÀÌ ±Ù°üÀÇ º¯À§¸¦ Àû°Ô À¯¹ßÇÏ°í °úµµÇÑ »èÁ¦ ·®À» ¿¹¹æ ÇÒ ¼ö ÀÖÀ¸¸ç ±Ù°ü ¼ºÇü½Ã°£µµ ´ÜÃà ÇÒ ¼ö ÀÖ´Â °ÍÀ¸·Î º¸ÀÌ¸ç µû¶ó¼­ ¾çÈ£ÇÑ ±Ù°ü ¼ºÇü °á°ú¿¡ ¿µÇâÀ» ÁØ´Ù°í º¼ ¼ö ÀÖ´Ù.

The purpose of this study was to compare the shaping ability of the two different Ni-Ti file systems and the two different engine systems in simulated canals. A total of four groups of each 10 were tested. Each group was instrumented with HeroShaper and Endo-Mate2 (Croup HE), HeroShaper and Tecnika (Croup HT), ProFile and Endo-Mate2 (Group PE), and ProFile and Tecnika (Croup PT). Canal preparation time was recorded. The images of pre- and post- instrumented root canals were scanned and superimposed. The amounts of increased width and centering ratio were measured and calculated at apical 1, 3 and 5mm levels. These data were statistically analyzed with one-way ANOVA and Duncan¡¯¡¯s multiple range test The results of this study were as fellows ; 1. Canal preparation time of HT group was the shortest (p<0.05). 2. The amount of increased canal width in HE group was significantly larger than PT group at apical 1mm level (p<0.05) At apical 3mm level, PT group was significantly smaller than other groups (p<0.05). At apical 5mm level, PE group was significantly larger than PT group (p<0.05). 3. The amount of centering ratio in HE group was significantly larger than other groups (p<0.05). At apical 5mm level, HT group was significantly larger than PE group and PT group (p<0.05). Under the condition of this study, torque-controlled endodontic motor is safer than no torque controlled motor, especially when the active file is used.

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