The effects of different cavity disinfectants on fracture resistance of tooth fragment reattachments.

Purpose: This study was conducted to investigate the fracture strength of reattached tooth fragments after different cavity disinfection protocols.

Materials And Methods: Incisal edges of 144 bovine incisors were sectioned and then randomly divided into 4 different groups as follows: Group C: no disinfectant; Group NaOCl: 2.5% sodium hypochlorite solution; Group NaOCl+Asc: 2.

Efficacy of Endoscope and Periapical Radiography to Detect Residual Root Canal Filling Using Micro-CT as Reference.

Introduction: To evaluate the efficacy of examinations by endoscope of root canals to determine residual root canal filling materials by comparison with microcomputed tomographic (micro-CT) images as reference.

Methods: Thirty maxillary second premolars with oval canals received root canal treatment. Then D-Race retreatment files were used to remove the root canal fillings supplemented by XP-endo Finisher.

Comparative genomic analysis of expansin superfamily gene members in zucchini and cucumber and their expression profiles under different abiotic stresses.

Unlabelled: Zucchini and cucumber belong to the Cucurbitaceae family, a group of economical and nutritious food plants that is consumed worldwide. Expansin superfamily proteins are generally localized in the cell wall of plants and are known to possess an effect on cell wall modification by causing the expansion of this region. Although the whole genome sequences of cucumber and zucchini plants have been resolved, the determination and characterization of expansin superfamily members in these plants using whole genomic data have not been implemented yet.

Metallurgical characterisation and torsional resistance of blue thermomechanically treated nickel titanium instruments after simulated ex vivo retreatment procedure.

To compare used and unused Reciproc Blue and Reciproc after retreatment, the instruments were used in the mesiobuccal canals of maxillary molars with curvature. The torsional resistances were tested and then unused instruments were subjected to XRD, DSC and microhardness tests. Student's t, ANOVA and Tukey's tests were performed (α-level 0.

The fracture strength of endocrowns manufactured from different hybrid blocks under axial and lateral forces.

Aim: This in vitro study was conducted to compare the fracture strength of endocrowns manufactured from different hybrid blocks under axial and lateral forces.

Material And Methods: Following root-canal treatment, 100 permanent mandibular first molars were randomly distributed among 5 groups according to restoration material. Endocrown restorations were produced from IPS e.

Clinical evaluation of a low-shrinkage resin composite in endodontically treated premolars: 3-year follow-up.

Objectives: This study compared the 3-year clinical performance of a low-shrinkage silorane-based composite material with that of a methacrylate-based composite material in the restoration of endodontically treated premolar teeth.

Materials And Methods: A total of 70 patients requiring a Class II composite-resin restoration of a premolar tooth following root-canal treatment participated in the study. Cavities were restored with either a silorane-based restorative (Filtek Silorane + Silorane System Adhesive) or a methacrylate-based restorative (Filtek Z250 + Clearfil SE Bond) system applied according to the manufacturer's instructions.

Cyclic Fatigue Resistance of XP-Endo Shaper, K3XF, and ProTaper Gold Nickel-titanium Instruments.

Introduction: The aim of this study was to compare the cyclic fatigue resistance of the ProTaper Gold (PTG; Dentsply Maillefer, Ballaigues, Switzerland), K3XF (SybronEndo, Orange, CA), and XP-endo Shaper (FKG Dentaire, La Chaux-de-Fond, Switzerland) nickel-titanium rotary instruments at intracanal temperatures.

Methods: Eighteen XP-endo Shaper (30.01), 18 K3XF (30.

Scanning electron microscopy with energy dispersive X-ray spectrophotometry analysis of reciprocating and continuous rotary nickel-titanium instruments following root canal retreatment.

This study aimed to evaluate superficial defects and the composition of Reciproc R25 and ProTaper Retreatment file systems (Dentsply Maillefer, Ballaigues, Switzerland) used for retreatment. A total of 100 maxillary incisor teeth were randomly divided into the following two groups: Reciproc R25 (n = 25) and ProTaper Retreatment instrument (n = 75) groups. The nickel-titanium (Ni-Ti) compositions of the files before and after use were analyzed using energy dispersive X-ray spectrophotometry (EDX).

Evaluation of goat milk as storage media to preserve viability of human periodontal ligament cells in vitro.

Background And Aim: The purpose of this study was to evaluate the effectiveness of goat milk as a storage media for maintenance of periodontal ligament (PDL) cell viability of avulsed teeth and compare it with commonly used and/or investigated storage media.

Materials And Methods: PDL cells were obtained from the root surface of healthy premolars and were cultured in Eagle's maintenance medium (EMM). Cell cultures were treated with the following storage media: tap water (negative control); EMM (positive control); Hank's balanced salt solution; ultra high temperature (UHT) long-shelf-life lactose-free cow milk; UHT long-shelf-life whole cow milk; UHT long-shelf-life skimmed cow milk; UHT long-shelf-life soy milk; UHT long-shelf-life goat milk, UHT long-shelf-life follow on milk with probiotic, 20% propolis, and egg white.

Antibacterial effect of N-acetylcysteine and taurolidine on planktonic and biofilm forms of Enterococcus faecalis.

Aim: This study investigated the antimicrobial activity of taurolidine and N-acetylcysteine (NAC) on planktonic and biofilm Enterococcus faecalis phenotypes.

Materials And Methods: The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of NAC and taurolidine were determined using broth microdilution, utilizing calcium hydroxide (CH), sodium hypochlorite, and chlorhexidine for comparisons. Thereafter, the ability of dentin powder to neutralize the antibacterial activity of NAC and taurolidine was studied.

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.

The Effects of Smoking on the Osmotic Pressure of Human Dental Pulp Tissue.

Objective: We aimed to investigate the effect of smoking on the osmotic pressure (OP) of human dental pulp tissue.

Materials And Methods: Sixty male dental patients (smokers and nonsmokers) scheduled for root canal treatment for prosthodontics were included in the study. Fifteen patients (1 premolar tooth/patient) were allocated to each of the following groups according to their smoking habits, i.

Effect of 1-piece post and core fabrication techniques on fracture strength.

Purpose: The purpose of this in vitro study was to evaluate and compare the fracture strengths of post and core systems produced with different fabrication techniques and materials.

Methods: Forty extracted human single-root premolars were used in this study. After root canal treatment, the teeth were randomly divided into 4 groups of 10 each as follows: group C: metallic 1-piece posts and cores fabricated by casting, and serving as the control; group CM: metallic posts and cores fabricated with the copy milled technique; group LS: 1-piece posts and cores fabricated with the laser sintering technique; and group ZR: 1-piece zirconia posts and cores fabricated with computer-aided design and computer-aided manufacturing (CAD-CAM).

A comparative scanning electron microscopy evaluation of smear layer removal from teeth with different irrigation solutions and lasers.

The aim of this study was to evaluate the efficacy of smear layer removal from teeth following root canals using lasers (Er:YAG and Nd:YAG), NaOCl, 17% EDTA, and MTAD by scanning electron microscopy (SEM). Root canals were irrigated with 3 mL of 5.25% NaOCl after each file.

The effect of different power outputs of carbon dioxide laser on bonding between zirconia ceramic surface and resin cement.

Objective: The purpose of this in vitro study was to evaluate the influence of different power outputs of a carbon dioxide (CO2) laser on shear bond strength of resin cement to zirconium dioxide-based ceramic.

Materials And Methods: Fifty zirconium dioxide core specimens (10 mm diameter and 2 mm thickness) were produced and they were embedded in the centers of auto-polymerizing acrylic resin blocks. Ten specimens served as control and no surface treatment was applied.

Effect of immediate and delayed post space preparation on the apical seal of root canals obturated with different sealers and techniques.

Unlabelled: During mechanical preparation of the post space, the root canal filling may be twisted or vibrated, depending on several factors associated with the preparation technique and quality of filling.

Objective: The purpose of this study was to investigate the effect of immediate and delayed post space preparation on the integrity of the apical seal.

Material And Methods: Sixty-four extracted human incisors were biomechanically prepared using the step-back technique.