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Continuous rotary system°ú single file systemÀÇ ¸¸°î ±Ù°ü ÇüÅ À¯Áö´É¿¡ ´ëÇÑ ºñ±³ ¿¬±¸

Comparative Study on the Ability of Instruments to Maintain Original Canal Curvature of Continuous rotary System and Single File System

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¹Ú»óÈñ ( Park Sang-Hee ) - ÀüºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
±è´öÁß ( Kim Deok-Joong ) - ÀüºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
¼Û¿ë¹ü ( Song Yong-Beom ) - ÀüºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
ÀÌÇýÀ± ( Lee Hye-Yun ) - ÀüºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
±èÇü¼± ( Kim Hyoung-Sun ) - ÀüºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
À̱¤¿ø ( Lee Kwang-Won ) - ÀüºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
À¯¹Ì°æ ( Yu Mi-Kyung ) - ÀüºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç

Abstract

¼º°øÀûÀÎ ±Ù°üÄ¡·á¸¦ À§ÇÏ¿© ¿ø·¡ ±Ù°ü ÇüŸ¦ µû¸£´Â ±Ù°ü ¼ºÇü °úÁ¤ÀÌ Áß¿äÇÏ´Ù. ±×·¯³ª ´ëºÎºÐÀÇ ±Ù°üÀº ¸¸°îµÇ¾î ÀÖ°í, ±Ù°ü ¼ºÇü ±â±¸´Â Á÷¼±ÀÇ ±Ý¼ÓÀ» ±âº»À¸·Î ¸¸µé¾îÁö±â ¶§¹®¿¡ ±Ù°ü ¼ºÇü ÈÄ ¸¸°î ±Ù°üÀÌ ¿ø·¡ ±Ù°ü ÇüŸ¦ ¹þ¾î³ª´Â ¿À·ù°¡ ³ªÅ¸³¯ ¼ö ÀÖ´Ù. ÀÌ·± ¿À·ùµé·Î ÀÎÇÏ¿© ±Ù°ü Ä¡·á°¡ ½ÇÆÐÇÒ ¼ö ÀÖÀ¸¹Ç·Î ±Ù°ü ¼ºÇü½Ã ¿ø·¡ ¸¸°îÇüŸ¦ À¯ÁöÇÒ ¼ö ÀÖ´Â ´Ù¾çÇÑ ±â¼ú°ú ¹æ¹ýµéÀÌ ¼Ò°³µÇ°í ÀÖ´Ù. º» ¿¬±¸ÀÇ ¸ñÀûÀº ¸¸°î ±Ù°ü ÇüÅÂÀÇ ·¹Áø ¸ðÇüÀ» ÀÌ¿ëÇÏ¿© ±â±¸ÀÇ ÇüÅÂ¿Í »ç¿ë¹æ¹ýÀÌ ´Ù¸¥ ¼¼ °¡Áö Ni-Ti ÆÄÀÏÀ» »ç¿ëÇÏ¿© Ni-Ti ÆÄÀÏ Á¾·ù¿¡ µû¸¥ ¸¸°î ±Ù°ü¿¡ ´ëÇÑ ¼ºÇü ÈÄ ÇüÅ À¯Áö´ÉÀ» ºñ±³ÇÏ´Â °ÍÀÌ´Ù. Á÷°æ°ú °æ»çµµ°¡ ISO 15, 0.02ÀÎ 30°³ÀÇ ·¹Áø¸ðÇüÀ» »ç¿ëÇÏ¿´´Ù. ±×·ì 1Àº ProfileÀ» ÀÌ¿ëÇÏ¿© #20/.06±îÁö ±Ù°ü ¼ºÇüÇÏ¿´°í, ±×·ì 2´Â Mtwo¸¦ ÀÌ¿ëÇÏ¿© #35/.04±îÁö ±Ù
°ü ¼ºÇüÇÏ¿´À¸¸ç, ±×·ì 3Àº PathFileÀ» ÀÌ¿ëÇÏ¿© glide path¸¦ ¸¸µé¾îÁØ ´ÙÀ½ WaveOne ÆÄÀÏ Áß PrimaryÀ» »ç¿ëÇÏ¿© ±Ù°ü ¼ºÇüÇÏ¿´´Ù. ±â±¸ »ç¿ë Àü°ú ÈÄÀÇ ·¹Áø¸ðÇüÀ» ½ºÄµÇÏ¿© µðÁöÅÐ À̹ÌÁö·Î ¸¸µé¾ú´Ù. °¢ À̹ÌÁö¸¦ Áßø½ÃŲ ´ÙÀ½ Matlab r2010b ¼ÒÇÁÆ®¿þ¾î¸¦ ÀÌ¿ëÇÏ¿© °î·ü¹Ý°æÀÇ ºñ(CRr)¸¦ °è»êÇÏ¿´´Ù. À̸¦ ¹ÙÅÁÀ¸·Î Ni-Ti file °£ ¼ºÇü ÈÄ ÇüÅ À¯Áö´ÉÀ» ºñ±³Çϱâ À§ÇÏ¿© 1-way ANOVA¸¦ ÀÌ¿ëÇÏ¿© ¼¼ ±×·ìÀÇ CRrÀÇ Â÷ÀÌ¿¡ ´ëÇÑ À¯ÀǼº °ËÁ¤À» ½ÃÇàÇÏ¿´´Ù.(P<.05) ¶ÇÇÑ continuous rotary system°ú single file system°£ÀÇ ÇüÅ À¯Áö´ÉÀ» ºñ±³Çϱâ À§ÇÏ¿© independent t-test¸¦ ÀÌ¿ëÇÏ¿´´Ù.(P<.05) °î·ü¹Ý°æÀÇ ºñ(CRr)¸¦ ÀÌ¿ëÇÏ¿© Ni-Ti ÆÄÀÏ Á¾·ù¿¡ µû¸¥ ¸¸°î ±Ù°üÀÇ ÇüÅ À¯Áö´ÉÀ» ºñ±³ÇÑ °á°ú Ni-Ti file °£¿¡´Â Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ ÀÖ¾ú´Ù.(P<0.05) ProFile°ú WaveOneÀº Mtwo¿¡ ºñÇؼ­ ¸¸°î ±Ù°ü¿¡¼­ÀÇ ÇüÅ À¯Áö´ÉÀÌ ¿ì¼öÇÏ°Ô ³ªÅ¸³µ´Ù.Ni-Ti ±â±¸ »ç¿ë ¹æ¹ý¿¡ µû¸¥ ¸¸°î ±Ù°ü ÇüÅ À¯Áö´ÉÀ» ºñ±³ÇÑ °á°ú continuous rotary system°ú single file system °£¿¡´Â Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù.(P>0.05)
º» ¿¬±¸°á°ú¿¡ µû¸£¸é, ProFile°ú WaveOneÀº Mtwo¿¡ ºñÇÏ¿© ¸¸°î ±Ù°ü¿¡¼­ÀÇ ÇüÅ À¯Áö´ÉÀÌ Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô ³ô°Ô ³ªÅ¸³µÀ¸¹Ç·Î, ProFile°ú WaveOneÀÌ ¸¸°î±Ù°ü¿¡ ´ëÇÑ ÇüÅ À¯Áö´ÉÀÌ ¿ì¼öÇÏ´Ù°í ÇÒ ¼ö ÀÖ´Ù. ¸¸°î±Ù°ü¿¡¼­ÀÇ ÇüÅ À¯Áö´É¿¡ À־ continuous rotary system°ú single file systemÀº ¸¸°î±Ù°ü¿¡¼­ÀÇ ÇüÅ À¯Áö´É¿¡ Â÷ÀÌ°¡ ¾ø´Ù.

Shaping the root canal system to maintain original canal curvature is essential to clinical success in endodontic treatment.
Opposed to most root canals that are curved, endodontic instruments are made from straight metal blanks. They have a
tendency of straightening the root canal during preparation and frequently result in procedural errors. A new treatment
method to maintain original canal curvature during shaping has been introduced for preventing procedural errors. The aim
of this study was to compare the ability of instruments to maintain original canal curvature of continuous rotary system
and single file system. Thirty ISO 15, 0.02 taper, Endo Training Blocks(Dentsplay Maillefer) were used. Specimens were
assigned to 1 of 3 groups for shaping: specimens in group 1 were shaped with ProFile #20/.06 at the WL. Specimens
in group 2 were shaped with Mtwo #35/.04 at the WL. Specimens in group 3 were shaped with WaveOne Primary
reciprocating files at the WL after the glide path was achieved with PathFile. Pre- and postinstrumentation digital images
were superimposed and processed with Matlab r2010b(The MathWorks Inc, Natick, MA) software to analyze the
curvature-radius ratio(CRr), representing canal curvature modification. Data for comparison on the ability of instruments to
maintain original canal curvature depending on each Ni-Ti file were analyzed with 1-way ANOVA(P<.05). Data for
comparison on the ability of instruments to maintain original canal curvature depending on each Ni-Ti file system were
analyzed with independent t-test(P<.05). A statistically significant difference(P<0.05) was noted on each Ni-Ti file. ProFile
and WaveOne instrumentations maintained the original canal curvature significantly better(P<0.05) than Mtwo file. There
were no significant difference(P>0.05) between continuous rotary system and single file system. Under the conditions of
this study, ProFile and WaveOne instruments maintained the original curvature significantly better than Mtwo file and were
less modification of the canal curvature compared. There was no significant difference between continuous rotary system
and single file system in shaping of simulated canals. As clinical practitioners, it may be advantages to use hybrid approach when root canal shapes depending on the design and usage of Ni-Ti files.

Å°¿öµå

continuous rotary system;°î·ü¹Ý°æÀÇ ºñ;Mtwo;ProFile;single file system;WaveOne
continuous rotary system;curvature radius ratio;Mtwo;ProFile;single file system;WaveOne

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