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Obturation efficiency of non-standardized gutta-percha cone in curved root canals prepared with 0.06 taper nickel-titanium instruments
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KMID : 0362320050300020079
Abstract
ÃÖ±Ù, ´Ù¾çÇÑ °æ»çµµÀÇ ´ÏÄÌ-ƼŸ´½ ±Ù°ü±â±¸¿Í ´õºÒ¾î ´Ù¾çÇÑ °æ»çµµÀÇ gutta-percha coneÀÌ ¼Ò°³µÇ¾ú´Ù. È¿À²ÀûÀÎ ±Ù°ü ÃæÀüÀ» À§Çؼ´Â ªÀº ½Ã°£¿¡ ÀûÀº ¼öÀÇ ±â±¸ ¹× Àç·á¸¦ »ç¿ëÇÏ¿© ±ÕÀÏÇÑ gutta-percha·Î ±Ù°üÀ» ÃæÀüÇÒ ÇÊ¿ä°¡ ÀÖ´Ù. º» ¿¬±¸¿¡¼´Â 0.06 °æ»çµµÀÇ ´ÏÄÌ-ƼŸ´½ Àüµ¿ÈÀÏ·Î Çü¼ºµÈ ¸¸°î ±Ù°ü¿¡¼ Ãø¹æ °¡¾Ð¹ýÀ¸·Î ±Ù°üÃæÀü½Ã ºñÇ¥ÁØÈ medium Å©±â master gutta-percha coneÀÇ ÃæÀüÈ¿À²À» ISO Ç¥ÁØÈ ±Ô°ÝÀÇ master cone°ú ºñ±³ÇÏ¿© Æò°¡ÇÏ°íÀÚ ÇÏ¿´´Ù. 60°³ÀÇ ¸ðÇü·¹Áø ¸¸°î±Ù°ü¿¡¼ 0.06 °æ»çµµÀÇ ´ÏÄÌ-ƼŸ´½ Àüµ¿ÈÀÏ ($ProTaper^{TM},\;ProFile^{(R)}$, Dentsply-Maillefer, Ballaigues, Switzerland)À» »ç¿ëÇÏ¿© ±Ù´ÜºÎ ±Ù°üÀÌ 30¹ø Å©±â°¡ µÇ°Ô crown-down¹ýÀ¸·Î ±Ù°üÀ» Çü¼ºÇÏ¿´´Ù. ±Ù°üÀº master gutta-percha cone, AH 26 ½Ç·¯ (Dentsply-DeTrey, Konstanz, Germany), ±×¸®°í type A accessory cone (Dentsply-Maillefer, Ballaigues, Switzerland)À» »ç¿ëÇÏ¿© Ãø¹æ°¡¾Ð¹ýÀ¸·Î ÃæÀüÇÏ¿´À¸¸ç, ÀÌ ¶§ »ç¿ëµÈ master gutta-percha cone(Diadent, Chongju, Korea)°ú Finger spreader(B type, Dentsply-Maillefer, Ballaigues, Switzerland)¿¡ µû¶ó ÀÓÀÇ·Î 15°³¾¿ 4°³ÀÇ ±ºÀ¸·Î ³ª´©¾î ½ÇÇèÇÏ¿´´Âµ¥, St/SS ±º¿¡¼´Â ISO Ç¥ÁØÈ ±Ô°ÝÀÇ 30¹ø master cone°ú ½ºÅ×Àη¹½º ½ºÆ¿ finger spreader¸¦, St/NT ±º¿¡¼´Â ISO Ç¥ÁØÈ ±Ô°ÝÀÇ 30¹ø master cone°ú ´ÏÄÌ-ƼŸ´½ finger spreader¸¦, Non-St/SS ±º¿¡¼´Â ºñÇ¥ÁØÈ medium ±Ô°Ý master cone°ú ½ºÅ×Àη¹½º ½ºÆ¿ spreader¸¦, ±×¸®°í Non-St/NT ±º¿¡¼´Â ºñÇ¥ÁØÈ medium Å©±â master cone°ú ´ÏÄÌ-ƼŸ´½ finger spreader¸¦ °¢°¢ »ç¿ëÇÏ¿´´Ù. ÃæÀüµÈ ±Ù°üÀº $37^{\circ}C$, »ó´ë½Àµµ $100\%$ÇÏ¿¡¼ 24½Ã°£ º¸°üÇÑ ÈÄ, Ä¡±Ù´Ü 1, 3¹× 5 mm¼öÁØ¿¡¼ ȾÀý´ÜÇÏ¿© ÀÔüÇö¹Ì°æ ÇÏ¿¡¼ °üÂûÇÏ°í ÄÄÇ»ÅÍ¿¡ ÀúÀåÇÑ ´ÙÀ½, $Auto^{(R)}$CAD 2000 ÇÁ·Î±×·¥À» ÀÌ¿ëÇÏ¿©, Çü¼ºµÈ ±Ù°ü ¹× gutta-percha ÃæÀü¹°ÀÇ ¿ÜÇüÀ» ÃßÀûÇÏ¿© ±Ù°ü³» gutta-percha ¸éÀûºñ¸¦ °è»êÇÏ¿´´Ù. Gutta-percha ¸éÀûºñÀÇ °á°úÄ¡´Â two-way ANOVA¸¦, ±×¸®°í accessory cone ¼ö´Â one-way ANOVA ¹× Duncan¡¯¡¯s multiple range test¸¦ ÀÌ¿ëÇÏ¿© Åë°è ºÐ¼®ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù. ½ºÅ×Àη¹½º ½ºÆ¿ finger spreader¸¦ »ç¿ëÇÑ °æ¿ì ¹× ´ÏÄÌ-ƼŸ´½ finger spreader¸¦ »ç¿ëÇÑ °æ¿ì °øÈ÷, ¸ðµç Ä¡±Ù´Ü ¼öÁØ¿¡¼ ºñÇ¥ÁØÈ medium Å©±â master cone »ç¿ë±ºÀÌ ISO Ç¥ÁØÈ ±Ô°ÝÀÇ master cone »ç¿ë±º¿¡ ºñÇØ À¯ÀÇÇÏ°Ô ³ôÀº gutta-percha ¸éÀûºñ¸¦ ³ªÅ¸³»¾ú´Ù (p < 0.01). ºñÇ¥ÁØÈ mediumÅ©±â master cone »ç¿ë±º¿¡¼´Â Ç¥ÁØÈ ±Ô°ÝÀÇ master cone »ç¿ë±º¿¡ ºñÇØ À¯ÀÇÇÏ°Ô ÀûÀº ¼öÀÇ accessory coneÀÌ »ç¿ëµÇ¾ú´Ù (p < 0.01).
The purpose of this study was to evaluate the obturation efficiency of a non-standardized gutta-percha cone in curved root canals prepared with 0.06 taper nickel-titanium instruments. Sixty simulated curved root canals in clear resin blocks were prepared with crown-down technique using 0.06 taper rotary $ProTaper^{TM}$and ProFile (Dentsply-Maillefer) until apical canal was size 30. Root canals were randomly divided into 4 groups of 15 blocks and obturated with cold-laterally compacted gutta-percha technique by using either a non-standardized size medium gutta-percha cone or an ISO-standardized size 30 one as a master cone. Gutta-percha area ratio were calculated at apical levels of 1, 3 and 5 mm using AutoCAD 2000 after cross-sectioning, and the data were analyzed with one-way and two-way ANOVAs and Duncan¡¯¡¯s multiple range test. Non-standardized size medium cone groups showed significantly higher gutta-percha area ratio than standardized cone groups at all apical levels (p < 0.01). Non-standardized cone groups used significantly less accessory cones than standardized cone groups (p < 0.01).
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