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Comparison of shaping ability using various Nickel-Titanium rotary files and hybrid technique

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Abstract

ÇöÀç ´Ù¾çÇÑ Á¾·ùÀÇ ´ÏÄÌ Æ¼Å¸´½ ÆÄÀÏ ½Ã½ºÅÛÀÌ ±Ù°ü Ä¡·á¿¡ »ç¿ëµÇ°í ÀÖÁö¸¸, ÇÑ Á¾·ùÀÇ ±â±¸·Î º¹ÀâÇÑ ±¸Á¶ÀÇ ±Ù°üÀ» ¸ðµÎ Ä¡·áÇϱâ´Â ¾î·Á¿î ½ÇÁ¤ÀÌ´Ù. µû¶ó¼­ ¿©·¯°¡Áö ÆÄÀÏ ½Ã½ºÅÛÀÇ °¢±â ´Ù¸¥ ÀåÁ¡À» °°ÀÌ ÀÌ¿ëÇÏ¿© ÀÓ»ó¿¡¼­ ´õ ½±°í, Á¤È®ÇÏ°Ô ±Ù°ü ¼ºÇüÀ» Çϱâ À§ÇØ hybrid method¸¦ »ç¿ëÇÑ´Ù.
ProTaper´Â Ãʱ⠱ٰü È®´ë È¿À²¼ºÀÌ ÁÁÁö¸¸ ±Ù´ÜºÎ ¼ºÇü¿¡ ¿©·¯°¡Áö ºÎÀûÀýÇÔÀÌ ÁöÀûµÇ¾î¿ÔÀ¸¸ç ±Ù·¡¿¡ ÀÌ·¯ÇÑ ¹®Á¦Á¡À» º¸¿ÏÇÑ ProTaper UniversalÀÌ ½ÃÆǵǾú´Ù.
º» ¿¬±¸ÀÇ ¸ñÀûÀº ProTaper ¹× ProTaper Universal°ú ProTaper UniversalÀÇ S-series¿Í ProFile ȤÀº Hero Shaper¸¦ »ç¿ëÇÑ hybrid methodÀÇ ±Ù°ü¼ºÇü È¿À²À» ºñ±³ÇÏ´Â °ÍÀÌ´Ù.
°æ·Â 10³âÀÇ ±Ù°üÄ¡·áÀü¹®ÀÇ°¡ ·¹Áø ºí·Ï ±Ù°üÀ» ÇÑ ¹æ¹ýÀ¸·Î 25°³¾¿, ¸ðµÎ 100°³¸¦ Çü¼ºÇÏ¿´´Ù. ±Ù°ü¼ºÇü ¼Ò¿ä ½Ã°£ ¹× ¼ºÇü ÀüÈÄÀÇ ±Ù°ü ¸¸°îÀ̳ª ¸¸°î ¹Ý°æÀÇ º¯È­, ±Ù°ü ÀÌÇü¼º ¿©ºÎ ¹× À̹ÌÁö ÁßøÀ» ÅëÇØ Ä¡±Ù´ÜÀ¸·ÎºÎÅÍ 1, 2, 3, 4, 5 mm À§Ä¡¿¡¼­ ±Ù°ü»èÁ¦·®, ±Ù°üÁ߽ɺ¯À§À²À» »êÃâ, ºñ±³ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ½Ã¼ú ½Ã°£ÀÇ °æ¿ì, ProFileÀÌ °¡Àå ¸¹Àº ¼ºÇü ½Ã°£À» ÇÊ¿ä·Î ÇÏ¿´°í, ProTaper UniversalÀÌ ProTaperº¸´Ù ´õ ºü¸¥ ¼ºÇü ½Ã°£À» ³ªÅ¸³Â´Ù(p < 0.05).
2. ±Ù°ü »èÁ¦·®¿¡ À־µµ ProFileÀÌ °¡Àå ÀûÀº »èÁ¦·®À» ³ªÅ¸³ÂÀ¸¸ç, Àü¹ÝÀûÀ¸·Î ProTaper UniversalÀÌ ProTaperº¸´Ù ÀûÀº »èÁ¦·®À» º¸¿´´Ù(p < 0.05).
3. ±Ù°ü Á᫐ º¯À§À²Àº ProFileÀÌ °¡Àå ÁÁÀº Á᫐ À¯ÁöÀ²À» º¸¿´À¸³ª(p < 0.05), ´Ù¸¥ ±ºÀº Å« Â÷ÀÌ°¡ ¹ß°ßµÇÁö ¾Ê¾Ò´Ù.
4. ´Ù¸¥ °üÂû Ç׸ñ¿¡¼­µµ À¯ÀÇÇÒ¸¸ÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù.
ÀÌ ½ÇÇè Á¶°ÇÇÏ¿¡, ProTaper UniversalÀÌ ProTaper¿¡ ºñÇØ ¼ºÇü ½Ã°£À̳ª »èÁ¦ Æø°æ µî ¼ºÇü È¿À²ÀÌ °³¼±µÈ ¸éÀÌ ÀÖ´Â °ÍÀ¸·Î ÆÇ´ÜµÇ¸ç ´É¼÷ÇÑ ¼úÀÚÀÇ °æ¿ì ¸¸°îµµ°¡ Å« ±Ù°ü¿¡¼­ FroTaper UniversalÀÌ ´Ù¾çÇÑ ÆÄÀÏÀ» »ç¿ëÇÏ´Â hybrid technique¸¸Å­ ÃæºÐÇÑ È¿À²¼ºÀ» °¡Áø °ÍÀ¸·Î ÃßÁ¤µÈ´Ù.

Currently, various Nickel-Titanium rotary files are used in endodontic treatment, but there is no one perfect system that can be applied to any clinical situation. Therefore, the combined uses of various file systems which can emphasize the advantages of each system are introduced as hybrid instrumentation.
The ProTaper system is efficient in body shaping and apical pre-enlargement but is reported to have more possibility of transportation and produce more aberrations and deformation in more or less severe curved canals. Recently, new ProTaper system(ProTaper Universal) with different configuration and cross-sectional design to overcome the week points of ProTaper have been marketed.
The purpose of this study was to compare and evaluate the shaping abilities of ProTaper, ProTaper Universal system, and two hybrid methods using S-series of ProTaper Universal and Hero Shaper or ProFile.
The time lapses for instrumentation were measured and the used files were inspected for distortion. The pre- and post-instrumented root canals were scanned and superimposed to evaluate the aberrations and reduction of root canal curvature and change of radius of canal curvature. The increased canal width and apical centering ratio were calculated at 1, 2, 3, 4 and 5 mm levels from apical foramen.
Under the conditions of this study, the ProTaper Universal seems to have better shaping ability than ProTaper in terms of instrumented width and instrumentation time. It may be suggested that the ProTaper Universal system is efficient as much as hybrid instrumentation using ProTaper and other constant-tapered NiTi file systems in highly experienced operators.

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Shaping ability;Hybrid method;ProTaper;ProTaper Universal;Experienced operator

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