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 radiotherapy on the coronal-sealing ability of two different root canal sealing materials.

Objective: This study aimed to assess the coronal-sealing ability of two different root canal obturation materials: gutta-percha with AH Plus and Resilon with Epiphany SE between radiated and nonirradiated groups.

Materials And Methods: Fifty-six extracted premolar teeth were randomly divided into two main groups according to the presence or absence of radiotherapy. Specimens were divided into two equal groups.

Evaluation of root canal morphology of human primary mandibular second molars by using cone beam computed tomography.

Objectives: The aim of the present study was to investigate the root canal configurations of primary mandibular second molars (PMSMs) using Vertucci classification. Materials and Methods: The root canal types of 228 PMSMs (228 mesial and 228 distal roots) were evaluated. In addition, the relationship between external root morphology and Vertucci classification was investigated.

Severe unintentional extrusion of mineral trioxide aggregate during apexification.

The aim of this report was to present the long-term clinical and radiographic outcomes of a case including severe unintentional extrusion of mineral trioxide aggregate (MTA). An 11-year-old boy was referred with a previously traumatized permanent central incisor which was temporarily treated by using calcium hydroxide root canal filling material. Since having an open apex and a large periapical lesion, root canal treatment with MTA apexification was planned.

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/.

Patterns of incisor-premolar agenesis combinations: A retrospective study.

Background: Tooth agenesis is the most common dental anomaly which causes serious problems in humans. Many theories were asserted to explain the main etiologic factor of this anomaly, and genetic factors were considered as primary reasons.

Aims: The aim of the present study was to evaluate the relationship between incisor and premolar tooth agenesis and to reveal a considerable data about combinations of incisor-premolar agenesis and their frequency.

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.

Clinical and radiological evaluation of calcium sulfate as direct pulp capping material in primary teeth.

Aim: To evaluate the clinical and radiological response of primary molars to direct pulp capping with calcium sulfate hemihydrate.

Materials And Methods: Forty primary molar teeth in 40 healthy children aged 5-9 years were treated by direct pulp capping. Teeth were randomly assigned to two groups (n=20) according to material used for capping, as follows: Group 1: calcium hydroxide cement (Dycal); Group 2: calcium sulfate hemihydrate (Dentogen).

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.

Comparison of hardness of three temporary filling materials cured by two light-curing devices.

Aim: Polymerization ability of light-curing devices can affect the light-cured material hardness. The purpose of the present study was to evaluate and compare the hardness of three temporary filling materials that had been light-cured by either a light emitting diode (LED) or a halogen light-curing unit.

Methods: The temporary filling materials, First Fill, Voco Clip and Bioplic, were placed in wells in a Teflon plate.

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.

Management of anterior dental crossbite with removable appliances.

Unlabelled: This case report describes the treatment of an 8-year-old girl with anterior dental crossbite using a series of removable appliances to bring the teeth into a normal position.

Clinical Presentation And Intervention: A removable acrylic appliance with a bite plate incorporating a screw was used to correct the anterior dental crossbite and align the incisors. The subsequent eruption of the maxillary left lateral incisor on the palatinal side was treated with a second acrylic plate incorporating a labiolingual spring.

Comparison of halogen versus LED light-cured temporary endodontic filling materials for sealing.

Aim: The purpose of this study was to compare the sealing ability of the three light-cured temporary restorative materials curing with two different light curing devices; halogen and LED.

Methods: After the preparation of standard endodontic access cavities, the canal systems were instrumented by using a step-back technique irrigated with sodium hypochlorite and EDTA. Light-cured temporary restorative materials; First fill, Bioplic, and Diatemp were applied and polymerized with either of the LED or Halogen light-curing devices.

The effects of calcium hydroxide removal methods on bond strength of Epiphany SE with two irrigation protocols.

Objective: The purpose of this study was to compare the effects of five calcium hydroxide removal methods on the bond strength of Epiphany SE sealer after canal irrigation with NaOCl+EDTA or NaOCl+MTAD.

Materials And Methods: The 120 roots were instrumented by using the ProTaper rotary system under irrigation with 2.5% sodium hypochlorite and randomly divided into two major groups according to the final irrigation: 1.

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.

Bacterial survival in the radiographic processes.

Aim: The purpose of this study was to investigate the microbial contamination in hand-operated and automatic radiographic solutions and on contact surfaces during radiographic procedures such as X-ray cone and button and surface of hand-operated and automatic radiographic solution tanks in dental clinics.

Methods: A 10 mL liquid solution was taken with syringe at 5, 10, 24, and 48 hour time intervals from freshly prepared hand-operated and automatic processing solution. The swab samples were taken from the surfaces of radiographic solution tanks, X-ray cone and its button.

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.

Evaluation of the relationship between passive smoking and salivary electrolytes, protein, secretory IgA, sialic acid and amylase in young children.

Objective: To evaluate the relationship between passive smoking as determined by salivary cotinine levels and salivary electrolytes, protein, secretory IgA, sialic acid and amylase in children.

Design: Saliva was collected from 90 passive smoker (PS) subjects (the study group) and 90 healthy age-matched children (the control group). The study group was divided into three subgroups according the number of cigarettes smoked.

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.