Effect of modified NaOCl irrigation solution on bond strength of bioceramic-based root canal sealer to dentin.

Introduction: Biomechanical shaping and hermetic obturation play an important role in the success of root canal treatment.

Aims And Objectives: This study aimed to examine the bonding strength of the bioceramics sealer to the dentin surface with or without core when irrigated with conventional NaOCl, modified NaOCl, EDTA, MTAD and distilled water. Materials and Methods: 120 single-root teeth dissected at the level of enamel-cement junction were grouped according to different irrigation and filling techniques; each group consisted 12 teeth.

Effect of retreatment instruments on microcrack formation: a microcomputed tomography study.

Introduction: The purpose of this study was to compare the occurrence of microcracks in teeth prepared with different retreatment systems using microcomputed tomography (micro-CT).

Methods: Forty-two freshly extracted mandibular premolar teeth were used. The root canals were instrumented with stainless steel K-files to an apical size of 35/.

Effect of propolis as a root canal irrigant on bond strength to dentin.

Purpose: The purpose of this in vitro study was to evaluate the effect of propolis on bond strength to dentin of a self-etch adhesive when used as a final irrigant.

Methods: 126 human third molars were sectioned 3 mm below the occlusal level and then randomly divided into 7 groups (n = 18). The exposed dentin surfaces were treated with irrigation solutions as follows: Group 1: 5.

Power Hydrogen Evaluation of Apexification Materials: EndoCal 10, Mineral Trioxide Aggregate and Calasept Plus.

Aim: The present study was to evaluate pH values of apexification materials.

Materials And Methods: The materials were placed in 1 cm long and 4 mm diameter tubes. After sample immersion, glass flasks were hermetically sealed with rubber caps to attenuate any effects of external environmental factors and maintained at 37°C.

The evaluation of two rotary instrumentation techniques under "operator-related variables" standardized conditions.

Objective: We aimed here to evaluate the enlargement characteristics of two nickel-titanium rotary instrument systems that use two different preparation techniques, in simulated root canals under "operator-related variables" standardized conditions.

Materials And Methods: A total of 40 simulated canals in resin blocks were divided into two groups as the Mtwo group for use with a single-length technique and the ProTaper instrument system group for use with crown down technique. To standardize the operator-related variables, all preparations were carried out with a computer controlled device that was developed and used previously as described in a published study.

Age and sex-related differences of pulp chamber size in mandibular second molars.

Aim: The aim of this study was to compare the size of the pulp chamber in mandibular second molars with the gender and age by means of panoromic radiographs.

Materials And Methods: In this study, 200 panoromic radiographs of patients were randomly selected from the archives of the Faculty of Dentistry of Ondokuz Mayis University. The radiographs of the patients were measured under a stereomicroscope and categorized according to the gender and age.

Temperature variation on root surface with three root-end cavity preparation techniques.

Introduction: Thermal changes can occur on the external root surface when root-end cavity preparation is performed, which may damage periodontal ligament cells and alveolar bone.

Objective: The purpose of this study was to evaluate the temperature changes during preparation of the root-end cavities at 1 and 3 mm to the sectioned apical root surfaces when either tungsten carbide round bur, diamond round bur or ultrasonic diamond tip was used.

Methods: Root-end resection was performed at 90 degrees to the long axis of the root, 3 mm from the apex.

Temperature variation during apicectomy with Er:YAG laser.

Objective: The purpose of this in vitro study was to evaluate the generated temperature of the Er:YAG laser, with three different pulse durations for apicectomy, compared with tungsten bur and surgical saw.

Background Data: Apicectomy is an endodontic surgery performed to remove the root apex and curette adjacent periapical tissue because of lesions of the apical area that are not healing properly.

Methods: Sixty single-rooted extracted human teeth were resected by three cutting methods: tungsten bur, surgical saw, and Er:YAG laser irradiation with three different pulse durations; pulse duration 50 μs, pulse duration 100 μs, and pulse duration 300 μs.

Effect of F-File on removal of the smear layer: a scanning electron microscope study.

The aim of this study was to evaluate the effectiveness of F-File with NaOCl on removal of the smear layer. A total of 48 single-rooted teeth were instrumented using crown-down technique with one of the irrigation agents: distilled water, 5.25% NaOCl, RC-Prep, Glyde, MTAD or F-File with NaOCl.

The effect of irrigation solutions on the apical sealing ability in different root canal sealers.

The aim of this study was to assess the effect of three root canal irrigation solutions on the apical sealing ability of three root canal obturation materials: gutta-percha/AH plus or MM-seal and Resilon/Epiphany SE. A total of 100 teeth with single straight root canals were randomly divided into three equal groups of 30 samples each, with the other 10 teeth (5 positive and 5 negative) used as controls. Each irrigation group was divided into three groups according to the use of three different root canal obturation materials (n = 10): Gutta-percha with AH plus or MM-seal, Resilon with Epiphany SE.

Radiopacity of an endodontic core material.

Purpose: To evaluate and compare the relative density values of a new endodontic core material (Resilon) and conventional gutta-percha.

Methods: 15 Resilon and gutta-percha discs for testing radiopacity were prepared by first coiling three size 35 cones. The coiled material was evenly compressed into the well of a brass mold 10 mm in diameter and a depth of 1 mm.

Can radiotherapy affect the apical sealing ability of resin-based root canal sealers?

Background: The authors conducted a study to assess the influence of radiotherapy on the apical sealing ability of one recently introduced resin-based root canal sealer and two sealers that have been in use for several years.

Methods: The authors divided 90 human maxillary anterior teeth into three groups according to the type of root canal sealer used and, using lateral condensation, obturated the roots with gutta-percha. They randomly divided all roots into two main groups according to the presence or absence of radiotherapy.

The resistance of collagen-associated, planktonic cells of Enterococcus faecalis to calcium hydroxide.

This study examined whether collagen association by an endodontic isolate of Enterococcus faecalis conferred resistance to the bacterium against calcium hydroxide. E. faecalis A197A was grown at 46 degrees C until early stationary phase.

Efficacy of 3 techniques in removing root canal filling material.

Objective: Retreatment of a root canal in the case of infection requires complete removal of previous filling material. This study evaluated the efficacy of 3 techniques in removing laterally compacted Resilon/Epiphany and gutta-percha/AH Plus from straight and curved canals during retreatment.

Materials And Methods: Extracted human teeth (90 maxillary anterior teeth with single,straight root canals and 90 mandibular molars with mesial canal root curvatures of 20 degrees to 35 degrees ) were divided into 6 groups each consisting of 15 straight and 15 curved root canals.

Solubility of root canal sealers with different organic solvents.

Objective: The aim of this study was to assess the solubility of the new root canal sealer Epiphany and to compare it with 2 conventional sealers against 2 organic solvents commonly used in retreatment.

Study Design: Standardized cylindric glass molds 5 mm wide and 2 mm high were filled with freshly mixed root canal sealers AH Plus, Ketac-Endo, and Epiphany. Samples were stored at 37 degrees C for 2 weeks.

The antimicrobial and antifungal efficacy of tetracycline-integrated gutta-percha.

The purpose of this study was in vitro evaluation of the antimicrobial and antifungal efficacy of commercially available gutta-percha containing tetracycline on some potential endodontic pathogens. The test microorganisms were Enterococcus faecalis, Pseudomonas aeruginosa, Staphylococcus aureus, Porphyromonas endodontalis, and Candida albicans . Tetracycline-integrated gutta-percha (TGP) cones, tetracycline disc, and conventional gutta-percha cones of the same size were placed on the inoculated plates.

Biocompatibility of retrograde root filling materials: a review.

The aim of a retrograde filling material is to fill the apical canal space and to obtain a hermetic seal between the periodontium and the root canal system. Several materials have been suggested for root-end filling including: amalgam, gutta-percha, zinc oxide-eugenol cements, glass ionomer cement, gold foil pellets, Cavit, composite resin and mineral trioxide aggregate (MTA). Super-ethoxy benzoic acid and MTA are the most suitable materials and provide better results in apicoectomy procedures than other filling materials.

Accuracy of two apex-locating handpieces in detecting simulated vertical and horizontal root fractures.

The aim of this study was to evaluate in vitro the effectiveness of TCM Endo V and Tri Auto ZX handpieces in detecting simulated horizontal and vertical root fractures. Forty extracted maxillary incisor teeth were randomly divided into 2 groups as simulated incomplete horizontal and vertical root fractures. Auto reverse and electronic apex locator functions of the 2 handpieces were used in both groups.

The apical sealing ability of a new root canal filling material.

Purpose: To assess the apical sealing property of a new root canal filling material, Epiphany.

Methods: Seventy extracted maxillary and mandibular single-rooted teeth were used. They were randomly divided into three groups and obturated by lateral condensation with gutta-percha and AH 26/AH Plus sealers and Resilon core material and Epiphany sealer.

Coronal sealing ability of a new root canal filling material.

Background And Objective: To date, many different materials have been proposed for root canal fillings, but gutta-percha (used with various types of sealers) has remained the material of choice for over a century. A new root canal obturation system, the Epiphany endodontic obturation system, has been developed to replace gutta-percha and traditional sealers for root canal obturation. The purpose of this study was to evaluate the coronal sealing ability of the new endodontic obturation system.

The antimicrobial and antifungal activity of a root canal core material.

Background: The authors conducted an in vitro study to determine the antimicrobial and antifungal activity of a recently introduced thermoplastic, synthetic, polymer-based polyester root canal core material (Resilon, Resilon Research, Madison, Conn.) against five different microorganisms by means of the agar diffusion test over different periods.

Methods: The microorganisms tested were Enterococcus faecalis, Pseudomonas aeruginosa, Staphylococcus aureus, Porphyromonas endodontalis and Candida albicans.

Radiopacity of a new root canal sealer, Epiphany.

Objective: The purpose of this study was to evaluate the radiopacity of a new root canal sealer, Epiphany, relative to 3 other root canal sealing materials, AH 26, Sealapex, and Ketac-Endo.

Study Design: Radiographs were taken of 1-mm-thick specimens of 4 root canal sealers and dentine slides, as well as a range of aluminum thicknesses, by using a step-wedge. The radiographic density of each specimen was measured and correlated with the equivalent thickness of aluminum.

Use of a pin and bar-retained composite bridge in anterior tooth loss: a case report.

A pin and bar-retained composite bridge can be used to replace missing teeth in cases when minimal tooth reduction is desired and patients refuse implant surgery for psychological reasons. This case report describes the clinical procedure for a pin and bar-retained composite bridge as a conservative solution for replacing missing teeth. The location and width of the toothless region, the patient's occlusion state, and poor oral habits may significantly affect the success of this alternative treatment.

The response of subcutaneous connective tissue to a new endodontic filling material.

The purpose of this histopathologic study was to assess and compare the subcutaneous connective tissue reaction to a new root canal filling material, Resilon and gutta-percha. The test materials were directly inserted subcutaneously into the dorsal connective tissue of Wistar albino rats. Histopathological examinations were done at 7, 15, 30, and 60 days after the implantation procedure.

Influence of immediate and delayed post space preparation on sealing ability of resilon.

Objective: The purpose of this study was to evaluate the effect of immediate and delayed post space preparation on the sealing ability of a new root canal filling material.

Study Design: Seventy-two extracted teeth were prepared and obturated with gutta-percha/AH-Plus and Resilon/Epiphany sealer by the lateral compaction technique. The teeth were divided randomly into 4 groups, and the post space was prepared either immediately after filling or after the obturated teeth had been stored in saline at 37 degrees C for a week.