Incidence of Dentinal Crack Formation Using ProTaper Universal and WaveOne Systems in Straight and Curved Root Canals.

Introduction: This study aimed to compare dentinal micro crack formation following root canal instrumentation with ProTaper Universal (PTU) and WaveOne (WO) rotary systems in straight and curved root canals.

Methods And Materials: One hundred mesiobuccal (MB) straight and curved canals of mandibular molars meeting inclusion criteria were divided into two control (=10) and four experimental groups (=20). After mounting the teeth and simulating the periodontal ligament, all the MB canals were coronally flared using Gates-Glidden drills #3 and 2 respectively.

Effect of pH on physical properties of two endodontic biomaterials.

Aims: To compare the surface microhardness, setting time, and elemental and topographic changes of mineral trioxide aggregate (MTA) and calcium-enriched mixture (CEM) in contact with acidic, neutral, and alkaline solutions.

Subjects And Methods: For evaluating 24-h and 28-day surface microhardness using Vickers test and initial setting time using Gillmore apparatus, glass molds were filled manually or ultrasonically, either with CEM or MTA and randomly immersed in solutions with acidic, neutral, and alkaline pH (5.4, 7.

X-ray Diffraction Analysis of ProRoot Mineral Trioxide Aggregate Hydrated at Different pH Values.

Introduction: The aim of this study was to compare the chemical compounds of white ProRoot mineral trioxide aggregate (WMTA) hydrated at different pH environments.

Methods And Materials: Mixed samples of WMTA were kept in acidic (pH=5.4), neutral (pH=7.

Tooth discoloration induced by calcium-silicate based materials: a literature review.

Introduction: Endodontic therapy may not focus only on biological and functional aspects, but should take esthetic considerations into account as well. It is common knowledge that calcium-silicate based materials may cause discoloration and thus impair the esthetic outcome of the treated tooth. The purpose of this review is to summarize the existing knowledge on the discoloration potential of these materials used for endodontic procedures.

Efficacy of Two Rotary NiTi Instruments in Removal of Resilon/Epiphany Obturants.

Introduction: The success of endodontic retreatment is related to the complete removal of the obturation material from the root canal system. The aim of this study was to evaluate the efficacy of Mtwo R and ProTaper retreatment files in removing the Resilon/Epiphany system with or without chloroform during retreatment.

Materials And Methods: Sixty distal roots of first mandibular molars were prepared and laterally condensed with Resilon/Epiphany, then divided into four groups (15 each for retreatment): 1) Mtwo R/solvent; 2) Mtwo R; 3) ProTaper D/solvent; and 4) ProTaper D.