Transparent resin blockÀ» ÀÌ¿ëÇÑ K3, NRT, PROFILEÀÇ apical transportation ¹× working length º¯È¾ç»óÀÇ ºñ±³
Comparison of apical transportation and change of working length in K3, NRT AND PROFILE rotary instruments using transparent resin block
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À±¹ÎÁ¤ ( Yoon Min-Jung ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇк´¿ø º¸Á¸°ú
¼Û¹ÎÁÖ ( Song Min-Ju ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ °³²¼¼ºê¶õ½ºº´¿ø º¸Á¸°ú
½Å¼öÁ¤ ( Shin Su-Jung ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ °³²¼¼ºê¶õ½ºº´¿ø º¸Á¸°ú
±èÀǼº ( Kim Eui-Seong ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇк´¿ø º¸Á¸°ú
KMID : 0362320110360010059
Abstract
¿¬±¸¸ñÀû: º» ¿¬±¸ÀÇ ¸ñÀûÀº ¼·Î ´Ù¸¥ ±âÇÏÇÐÀû ÇüŸ¦ °¡Áø 3°¡Áö Ni-Ti ÆÄÀÏ, Áï K3, NRT, ProfleÀ» »ç¿ëÇÏ¿© ·¹Áø ºí·ÏÀ¸·Î Á¦ÀÛµÈ ¸¸°î ±Ù°ü¿¡¼ÀÇ apical transportation ¾ç»ó ¹× working length º¯È¸¦ ¼·Î ºñ±³ÇÏ´Â °ÍÀÌ´Ù.
¿¬±¸ Àç·á ¹× ¹æ¹ý: ½ÇÇè ¹æ¹ýÀº 30°³ÀÇ ·¹Áø ºí·ÏÀ» Schneider technqueÀ» »ç¿ëÇÏ¿© ¸¸°îµµ ÃøÁ¤ ÈÄ °¢ group´ç ÀÓÀÇ·Î 10°³¾¿ ¹èºÐÇÏ¿´´Ù. À̸¦ °¢ Ni-Ti ÆÄÀÏÀ» »ç¿ëÇÏ¿© crown down techniqueÀ¸·Î ±Ù°ü ¼ºÇüÇÏ¿´´Ù. ÀÌÀÇ ºÐ¼®À» À§ÇØ double radiograph superimposition method (Backman CA 1992)¸¦ »ç¿ëÇÏ°í, ºÐ¼®ÀÇ Á¤È®¼º°ú ÀÏ°ü¼ºÀ» À§ÇØ Æ¯º°È÷ °í¾ÈµÈ jig, digital X-ray ¹× apical transportationÀÇ ÃøÁ¤ ½Ã CAD/CAM software¸¦ ÀÌ¿ëÇÏ¿´´Ù. Apical transportation ¾çÀº ¡¯±Ù´Ü°ø-0.5 mm¡¯ºÎÀ§·ÎºÎÅÍ 0, 1, 3, 5 mm¿¡¼ ÃøÁ¤ ÇÏ¿´À¸¸ç, working length º¯È´Â ±Ù°ü ¼ºÇü ÀüÈÄÀÇ working length º¯È¸¦ ÃøÁ¤ÇÏ¿´´Ù. ¶Ç Åë°è 󸮴 °¢ groupÀÇ apical transportation ¾ç°ú working length º¯È¸¦ Kruskal-Wallis One Way Analysis·Î ºÐ¼® ÈÄ ´ÙÁß ºñ±³´Â Mann-Whitney U-test¸¦ »ç¿ëÇÏ¿´´Ù.
°á°ú: °¢ group°£ working lengh º¯È ¹× 0, 1, 3 mm ºÎÀ§¿¡¼ÀÇ apical transportation ÃøÁ¤ °ª »çÀÌ¿¡´Â À¯ÀÇÇÒ¸¸ÇÑ Â÷ÀÌ°¡ °üÂûµÇÁö ¾Ê¾ÒÀ¸³ª(p = 0.924), 5 mm ºÎÀ§¿¡¼´Â K3¿Í Profile»çÀÌ¿¡ À¯ÀÇÇÒ ¸¸ÇÑ Â÷ÀÌ°¡ ÀÖ¾ú´Ù(p = 0.027).
°á·Ð: ¼·Î ´Ù¸¥ ±âÇÏÇÐÀûÀÎ ÇüŸ¦ °¡Áø 3°¡Áö Ni-Ti ÆÄÀÏÀÇ apical transportation ¹× working length º¯È Á¤µµ Æò°¡½Ã, º» ¿¬±¸ÀÇ ¹üÀ§ ³»¿¡¼´Â 3°¡Áö ÆÄÀÏ ¸ðµÎ À¯ÀÇÇÒ ¸¸ÇÑ Â÷À̸¦ º¸ÀÌÁö ¾ÊÀº °¡¿îµ¥ º»·¡ÀÇ ±Ù°ü ÇüŸ¦ Àß À¯ÁöÇÑ´Ù°í ÇÒ ¼ö ÀÖ´Ù.
Objectives: The purpose of this study is to compare the apical transportation and working length change in curved root canals created in resin blocks, using 3 geometrically different types of Ni-Ti files, K3, NRT, and Profile.
Materials and Methods: The curvature of 30 resin blocks was measured by Schneider technique and each groups of Ni-Ti files were allocated with 10 resin blocks at random. The canals were shaped with Ni-Ti files by Crown-down technique. It was analyzed by Double radiograph superimposition method (Backman CA 1992), and for the accuracy and consistency, specially designed jig, digital X-ray, and CAD/CAM software for measurement of apical transportation were used. The amount of apical transportation was measured at 0, 1, 3, 5 mm from ¡¯apical foramen - 0.5 mm¡¯ area, and the alteration of the working length before and after canal shaping was also measured. For statistics, Kruskal-Wallis One Way Analysis was used.
Results: There was no significant difference between the groups in the amount of working length change and apical transportation at 0, 1, and 3 mm area (p = 0.027), however, the amount of apical transportation at 5 mm area showed significant difference between K3 and Profile system (p = 0.924).
Conclusions: As a result of this study, the 3 geometrically different Ni-Ti files showed no significant difference in apical transportation and working length change and maintained the original root canal shape.
Å°¿öµå
Apical transportation; K3; NRT; PROFILE; Working length changes
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