TY - JOUR JF - gums-med JO - JGUMS VL - 13 IS - 51 PY - 2004 Y1 - 2004/10/01 TI - Comparative Study on Degree of Root Canal Transportation Using Two Rotary Systems of Protaper, Profile 0.04 Taper and Hand K- Flexofiles in a In Vitro Condition TT - بررسی مقایسه‌ای میزان جابجایی مسیر کانال ریشه دندان با استفاده از دو سیستم چرخشی ProFile. 04 taper, Protaper و فایلهای دستی K-Flexofile در شرایط آزمایشگاهی N2 - Abstract Introduction : Root canal preparation is one of the most important stages of endodontic treatment. It seems that rotary NiTi files are efficient instruments in root canal preparation. Objective: This in vitro study was designed to assess the degree of canal transportation, resulting from instrumentation by a new rotary system (protaper) and to compare it with rotary profile 0.04 taper series 29 system and hand K- flexofiles in a Step- back manner. Materials and Methods: Thirty six mesiobuccal canals of extracted human mandibular molars were instrumented in three groups by each of these methods respectively. Rotary systems were used in a crown- down manner according to the manufacture’s instruction, and stainless steel K- flexofiles were used in a conventional step- back method. Pre- and postoperative X- rays were taken, projected and degree of canal curvature was determined according to the schneider method. The difference of pre- and postoperative canal curvature was evaluated with ANOVA and student tests. Results: The results of statistical analysis indicated that the degree of canal transportion in protaper group was statistically less than that in K- flexofile group that this difference was statistically significant(P SP - 78 EP - 85 AU - Gheshlaghi- Azar, N AU - Javad zadeh Haghighat, AS AD - KW - ٌRoot Canal Prepration KW - Root Canal Therapy UR - http://journal.gums.ac.ir/article-1-658-en.html ER -