The ability of three nickel–titanium mechanized systems to negotiate and shape MB2 canals in extracted maxillary first molars: a micro-computed tomographic study
Aim To evaluate the influence of three engine-driven NiTi file systems manufactured from different NiTi alloys for the preparation of second mesiobuccal (MB2) canals in extracted maxillary first molars using a micro-computed tomographic (micro-CT) scanner. Methodology Thirty maxillary molars with two canals in the mesiobuccal root were selected and randomly divided into three groups (n […]
Evaluation of apical transportation and centring ability of five thermally treated NiTi rotary systems
Aim To evaluate apical transportation and centring ability during root canal preparation in mesial root canals of mandibular molars associated with ProTaper Gold (PTG), ProDesign S (PDS), Hyflex CM (HCM), Hyflex EDM and ProDesign Logic (PDL). Methodology Sixty mandibular first molars with two separate canals in the mesial root were selected after root anatomy pairing […]
Cyclic Fatigue Resistance of WaveOne Gold, ProDesign R and ProDesign Logic Files in Curved Canals In Vitro
Introduction: Endodontic instruments are developed to provide a better cleaning of the root canal system and reduce its risk of fracture. The aim of this study was to evaluate the instrumentation time and cyclic fatigue resistance of WaveOne Gold, ProDesign R and ProDesign Logic files. Methods and Materials: Thirty Nickel-titanium (NiTi) rotary instruments were divided into 3 […]
Cyclic Fatigue and Torsional Resistance of Four Martensite-Based Niti Reciprocating Instruments
Objective: To evaluate cyclic fatigue and torsional resistance of Reciproc Blue R25 (VDW, Munich, Germany), WaveOne Gold Primary (Dentsply Maillefer, Ballaigues, Switzerland), ProDesign R (Easy Equipamentos Odontológicos, Belo Horizonte, Brazil), and X1 Blue File (MK Life, Porto Alegre, Brazil) nickel titanium (NiTi) martensite reciprocating instruments. Methods: In each group, ten instruments were tested for cyclic fatigue resistance […]
Cyclic fatigue using severely curved canals and torsional resistance of thermally treated reciprocating instruments
Objectives To evaluate the cyclic fatigue using severely curved canals and torsional resistance of ProDesign R (Easy Equipamentos Odontológicos, Belo Horizonte, MG, Brazil), Reciproc Blue (VDW, Munich, Germany), and WaveOne Gold (Dentsply Maillefer, Ballaigues, Switzerland) reciprocating instruments. Materials and methods: Twenty instruments of the ProDesign R (25/0.06) system, 20 instruments of the Reciproc Blue (25/0.08v) […]
Cyclic fatigue and torsional strength of three different thermally treated reciprocating nickel-titanium instruments
Objectives: The aim of this study was to evaluate the cyclic and torsional fatigue resistance of the reciprocating single-file systems Reciproc Blue 25.08 (VDW GmbH, Munich, Germany), Prodesign R 25.06 (Easy Dental Equipment, Belo Horizonte, Brazil), and WaveOne Gold 25.07 (Dentsply/Tulsa Dental Specialties, Tulsa, OK, USA). Materials and methods: Sixty reciprocating instruments of the systems Reciproc Blue […]
Cyclic and Torsional Fatigue Resistance of Reciprocating Single Files Manufactured by Different Nickel-titanium Alloys
Introduction: The aim of this study was to evaluate the cyclic and torsional fatigue resistance of the following reciprocating single-file systems: ProDesign R 25.06 (Easy Equipamentos Odontológicos, Belo Horizonte, Brazil), Reciproc R25 (VDW GmbH, Munich, Germany), and Unicone L25 (Medin SA, Nov_e M_esto in Morav_e, Czech Republic). Methods: Sixty instruments of the ProDesign R, Reciproc R25, […]
Bending Resistance and Cyclic Fatigue of a New Heat-Treated Reciprocating Instrument
The current study aimed to evaluate the bending resistance and the cyclic fatigue life of a new heat-treated reciprocating instrument (ProDesign R). Untreated ProDesign R, Reciproc R25, and WaveOne Primary instruments were used as reference instruments for comparison. The bending resistance was performed in ten instruments of each system by using a universal testing machine […]
Ultrasonic tips as an auxiliary method for the instrumentation of oval-shaped root canals
To evaluate the influence of novel ultrasonic tips as an auxiliary method for the rotary preparation of flattened/oval-shaped canals. Fortyfive mandibular incisors were selected and divided into one of three experimental g roups (n = 15): Group PFCP – P roDesign L ogic 2 5/.05 + Flatsonic + Clearsonic + Prodesign Logic 40/.01; Group FCP […]
Torsional fatigue resistance of pathfinding instruments manufactured from several nickel-titanium alloys
The torsion tests were performed based on ISO 3630-1 (1992). Three millimetres of each instrument tip was clamped to a small load cell by a lever arm linked to the torsion axis. Data were analysed using a one-way analysis of variance (ANOVA) and Tukey test with a significance level at a = 5%. Results: The […]
