Effect of light-activated bleaching on pulp chamber temperature rise: an in vitro study.

This study aimed to compare the pulp chamber temperature changes that occur with the use of different light sources during vital bleaching with and without application of bleaching agents. One hundred and forty-four mandibular incisor teeth were divided into four groups (n = 36) according to the use of halogen light, light-emitting diode, 3 W and 1.5 W diode laser.

Effect of different root canal sealers on fracture strength of simulated immature roots.

Objective: The objective of this study was to compare the effects of different root canal sealers on fracture resistance of simulated immature teeth.

Study Design: One hundred eight roots were divided into 9 groups. The roots were instrumented except the negative controls.

Sharp curvature of premolar resulting in external apical root resorption of the neighbouring molar.

This case report describes an external apical root resorption resulted from the unusual root morphology of the neighbouring tooth. A 28-year-old female was referred to the department of endodontics with a complaint of intense pain in her maxillary second premolar tooth. The clinical and radiographical evaluation revealed an external apical resorption in the mesial root of the maxillary first molar, which shows close proximity to the severely curved root of the premolar.

Temperature rise and shear bond strength of bondable buccal tubes bonded by various light sources.

The objective of the present investigation was to determine the intrapulpal temperature changes and to compare the shear bond strength (SBS) of bondable buccal tubes bonded by high-intensity light sources. Ninety caries-free human first molar teeth extracted for periodontal reasons were used. For the temperature measurement test, 30 teeth were randomly divided into three groups (n = 10) whereas 60 teeth were used in three groups (n = 20) for SBS testing.

Fracture resistance of roots obturated with three different materials.

Objective: The aim of this study was to compare the fracture resistance of roots obturated with different materials.

Study Design: Sixty root canals were instrumented and divided into 4 equal groups (n = 15 each). The root canals in group 1 were filled with AH26 sealer and gutta-percha, in group 2 with Resilon and Epiphany, and in group 3 with Ketac-Endo Aplicap and gutta-percha.

Effects of Er:YAG laser and Nd:YAG laser treatment on the root canal dentin of human teeth: a SEM study.

The objective of the study was to observe the morphological changes on root canal dentin after Er:YAG laser and Nd:YAG laser treatment. Twenty-one teeth biomechanically prepared were divided into three groups with seven teeth of each. Group A was unlased as a control.

Endodontic treatment of a maxillary second molar with 2 palatal roots: a case report.

The incidence of second palatal root in the maxillary second molar is very rare. This case report describes the treatment of a 4-rooted maxillary second molar with 2 distinct palatal roots. Clinical examination and radiographs showed the presence of a second palatal root.

Effects of Nd: YAG laser irradiation on the adaptation of composite resins to root dentin.

One of the most important goals of the restoration of endodontically treated teeth with a composite resin post system is to achieve good adaptation of the composite material to dentin walls to prevent microleakage apically and coronally. In post core systems, to avoid microleakage between the dentin wall and resin material, laser irradiation may seem to be an alternative therapy for increasing adaptation quality. The aim of this study was to investigate the adaptation of a packable composite resin to lased root canal dentin when it was used as post material.