Pericervical Dentin Metrics in Mandibular First Molars Determined with Digital Periapical Radiography and Cone-beam Computed Tomography
Pericervical root dentin is decisive for the long-term mechanical integrity of root-filled teeth. Current treatment protocol does not include a customized step to determine the pretreatment residual pericervical root dentin.
Cyclic and torsional fatigue resistance of thermally treated rotary NiTi instruments with different designs
Introduction: The aim was to evaluate the cyclic and torsional fatigue resistance among thermally treated NiTi rotary instruments with different design features. Materials and methods: Sixty instruments of three systems were used (n=20): TruNatomy 26.04 (TN 26.04), BassiLogic 25.05 (BL 25.05), and Flat File 25.04 (FF 25.04). The cyclic fatigue test (n=10) was made in […]
Cyclic and torsional fatigue resistance of a new rotary file on a rotary and reciprocating motion
Abstract: This study evaluated the cyclic and torsional fatigue resistance of a new nickeltitanium (Flat File 25.04) instrument on the continuous and reciprocating motion. Sixty instruments of the ProDesign Logic2 25.03 and 25.05 (Easy Equipamentos Odontologicos, Belo Horizonte, Brazil), and MK Flat File 25.04 (n = 20) (MK Life, Porto Alegre, Brazil) were used. For the […]
Cyclic and torsional fatigue resistance of three different thermally treated nickel-titanium rotary instruments
Resumo The aim of this study was to evaluate the cyclic fatigue and torsional fatigue resistance of three thermally treated rotary instruments, such as: Logic 2 25.05 (LOG 25.05), Edge Taper Platinum 25.06 (EDT 25.06) and ProTaper Gold 25.08 (PTG 25.08). Methods: A total of 60 rotary instruments of LOG 25.05, EDT 25.06 and PTG […]
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 […]
Performance of Three Single Instrument Systems in the Preparation of Long Oval Canals
This study aimed to evaluate the performance of the Wave One, Easy ProDesign Logic and One Shape systems in the preparation of long oval root canals. Forty-two mandibular incisors were randomized into three groups: Group I, Wave One Primary (WO) (#25.08); Group II, Easy ProDesign Logic (EPL) (#25.06) and Group III, One Shape (OS) (#25.06). […]
Micro–computed Tomography versus the Cross-sectioning Method to Evaluate Dentin Defects Induced by Different Mechanized Instrumentation Techniques
The objective of this study was to compare the methods of micro–computed tomography (micro-CT) and cross-sectioning followed by stereomicroscopy in assessing dentinal defects after instrumentation with different mechanized systems. Methods: Forty mesial roots of mandibular molars were scanned and divided into 4 groups (n = 10): Group R, Reciproc; Group PTN, ProTaper Next; Group WOG, WaveOne […]
Comparison of two methods of irrigant agitation in the removal of residual filling material in retreatment
The aim of this study was to compare the efficacy of passive ultrasonic irrigation and EasyClean for removing residual filling material in retreatment. Twenty-two maxillary lateral incisors with apical curvature were instrumented with ProTaper files and filled with Endofill using the lateral compactation technique. Removal of filling material was performed with Reciproc, Mtwo and ProDesign […]
