Comparative evaluation of the shaping ability of WaveOne, Reciproc and OneShape single-file systems in severely curved root canals of extracted teeth

• Published in: International endodontic journal 2015-01, Vol.48 (1), p.109-114
• Main Authors: Saber, S. E. D. M., Nagy, M. M., Schäfer, E.
• Format: Article
• Language: English
• Subjects: apical transportation; canal straightening; Dental Pulp Cavity - anatomy & histology; Dental Pulp Cavity - diagnostic imaging; Dentistry; Equipment Design; Humans; In Vitro Techniques; Materials Testing; Molar; OneShape; Radiography, Dental, Digital; Reciproc; Root Canal Preparation - instrumentation; shaping ability; WaveOne
• ISSN: 0143-2885; 1365-2591
• DOI: 10.1111/iej.12289

Aim To compare the shaping ability of WaveOne, Reciproc and OneShape single‐file systems in severely curved root canals in extracted human molar teeth. Methodology Sixty mandibular molars with mesio‐buccal canals with curvatures ranging between 25° and 35° and radii of curvature ranging between 4 and 9 mm were divided into three groups of 20 teeth each: group W (WaveOne), group R (Reciproc) and group O (OneShape). Using standardized pre‐ and post‐instrumentation radiographs, straightening of canal curvatures was determined using the NIH Image J software. A double‐digital standardized radiographic technique was used to determine apical transportation at 0.5 mm from the working length (1.5 mm coronal to the major foramen). Preparation time and instrument failures were also recorded. Data were analysed using one‐way analysis of variance (anova) and post‐hoc Tukey‐test. Results During root canal preparation, no instruments fractured but all OneShape instruments were deformed after preparation of four canals. The use of OneShape resulted in significantly greater canal straightening and apical transportation than WaveOne and Reciproc (P  0.05). Instrumentation with OneShape was significantly faster than with WaveOne and Reciproc (P