Factors Affecting Trust in Female and Male School Leaders

This research aims to determine the factors that affect teachers’ trust in male and female leaders. The study employed a qualitative research design. The data were collected with interview technique. In this regard, 20 teachers were interviewed. The participants were determined with purposeful sampling method. The data were analyzed with inductive analysis method. Results revealed that the participant teachers trust different behaviors or characteristics of their male or female leaders. In general, teachers trust in their female leaders’ more because of their objective, idealistic, dedicated behaviors, and also their motherly, sensitive and compassionate personality. On the other hand, teachers trust in their male leaders as they are fair, trustworthy, frank, competence, more rational and strong communicators. While male leaders are believed to take initiative and implement the laws and regulations more strictly, female administrators are more interested in the administration profession, behave meticulously and work devotedly. It is recommended that school administrators should create a climate of objectivity and trust in school.Esta investigación tiene como objetivo determinar los factores que afectan la confianza de los docentes en los líderes masculinos y femeninos. El estudio empleó un diseño de investigación cualitativo. Los datos fueron recolectados con la técnica de la entrevista. Al respecto, se entrevistó a 20 docentes. Los participantes se determinaron con el método de muestreo intencional. Los datos fueron analizados con el método de análisis inductivo. Los resultados revelaron que los docentes participantes confían en diferentes comportamientos o características de sus líderes masculinos o femeninos. En general, los docentes confían más en sus lideresas por su comportamiento objetivo, idealista, dedicado, y también por su personalidad maternal, sensible y compasiva. Por otro lado, los docentes confían en sus líderes masculinos ya que son comunicadores justos, confiables, francos, competentes, más racionales y fuertes. Si bien se cree que los líderes masculinos toman la iniciativa e implementan las leyes y reglamentos de manera más estricta, las administradoras están más interesadas en la profesión administrativa, se comportan meticulosamente y trabajan con devoción. Se recomienda que los administradores escolares creen un clima de objetividad y confianza en la escuela

Long-term effect of nanosized boric acid powder on optical properties of polymer infiltrated ceramic CAD-CAM material

The current study investigated the effect of boric acid (H3BO3) nanosized powder on the optical properties of a Computer-Aided Design and Computer-Aided Manufacturing (CAD-CAM) polymer infiltrated ceramic material. Specimens (n = 60), (15 x 8 x 1.5 mm(3)) were fabricated from a polymer infiltrated ceramic network (PINC) (Vita Enamic, Vita Zahnfabrik, VITA-shade scale A2). Boric acid (B) nano powder was applied to Vita Enamic in half of the specimens (n = 30), while the other half was left untreated (NB) (n = 30). Aging for all specimens was performed for 5 h at 134 degrees C. Color coordinates (L*, a*, and b*) before and after aging were measured to calculate the color change (Delta E-00) and the translucency parameter (TP) within and between the B and NB groups. One-way ANOVA was used to analyze the effect of boric acid on all color parameters (alpha = 0.05). Only L* increased in B after aging (p < 0.001). L* and b* significantly changed after aging in NB (p < 0.001). Boric acid application affected the color change within the ceramic after aging (p < 0.001). The mean color change (Delta E-00) in B after aging was significantly smaller than the color change in NB after aging (p < 0.001). The color difference between B and NB increased after aging (p < 0.001). No significant effect of aging was found on TP of B (p = 0.143). The TP of NB significantly decreased after aging (p < 0.001). The use of boric acid provided color stability and translucency on aged tested material

Long-Term Effect of Nanosized Boric Acid Powder on Optical Properties of Polymer Infiltrated Ceramic CAD-CAM Material

The current study investigated the effect of boric acid (H$_{3}$BO$_{3}$) nanosized powder on the optical properties of a Computer-Aided Design and Computer-Aided Manufacturing (CAD-CAM) polymer infiltrated ceramic material. Specimens (n = 60), (15 × 8 × 1.5 mm$^{3}$) were fabricated from a polymer infiltrated ceramic network (PINC) (Vita Enamic, Vita Zahnfabrik, VITA-shade scale A2). Boric acid (B) nano powder was applied to Vita Enamic in half of the specimens ($n$ = 30), while the other half was left untreated (NB) ($n$ = 30). Aging for all specimens was performed for 5 h at 134 °C. Color coordinates (L*, a*, and b*) before and after aging were measured to calculate the color change (ΔE$_{00}$) and the translucency parameter (TP) within and between the B and NB groups. One-way ANOVA was used to analyze the effect of boric acid on all color parameters (α = 0.05). Only L* increased in B after aging (p < 0.001). L* and b* significantly changed after aging in NB (p < 0.001). Boric acid application affected the color change within the ceramic after aging (p < 0.001). The mean color change (ΔE$_{00}$) in B after aging was significantly smaller than the color change in NB after aging (p < 0.001). The color difference between B and NB increased after aging (p < 0.001). No significant effect of aging was found on TP of B (p = 0.143). The TP of NB significantly decreased after aging (p < 0.001). The use of boric acid provided color stability and translucency on aged tested material

Clinical outcomes of non-surgical multiple-visit root canal retreatment: a retrospective cohort study

This study aimed to investigate the effects of several clinical factors on the success and survival rates of multiple-visit non-surgical root canal (NSRC) retreatment. Failed endodontically treated 236 teeth in 161 patients (18-72 years, 48% males; and 52% females) were retreated between March 2014 and December 2015 and were enrolled in this study. Two calibrated examiners evaluated the preoperative, intraoperative, and postoperative outcomes using the periapical index (PAI) scores. The teeth were classified as healed (healthy apical tissues, PAI ≤ 2, no signs or symptoms), healing (no signs and symptoms, PAI > 2 but reduced from the initial PAI score), and not-healed (presence of apical periodontitis, signs and/or symptoms, PAI > 2). The teeth scored as healed and healing was considered to be successful, while the not-healed ones were considered as failures. Of the 236 teeth, 135 (57.3%) in 103 patients (63.9%) were lost to follow-up, yielding to follow-up of 101 teeth (42.7%) in 58 patients (36%). Three teeth were extracted yielding to an overall success rate of 85.1%, at a mean observation time of 33.8 months. The teeth with periapical lesions  0.05). While, age, gender, preoperative, intraoperative, and postoperative factors did not significantly affect the outcomes (P > 0.05), tooth type significantly affected the success rate (P < 0.05). The most frequently failed teeth were the mandibular first molars (P < 0.05). Based on these results, the multiple-visit NSRC retreatment exhibited a favorable success rate and could be offered for the endodontically failed teeth

Inadvertent right ventricular apical exit after stereotactic body radiotherapy for ventricular tachycardia: Every cloud has a silver lining

A 78-year-old man suffering from gastric cancer with ischemic cardiomyopathy and recurrent ICD shocks consented to ventricular tachycardia (VT) ablation. He had a previous endocardial VT ablation 1 year ago, and a stereotactic radioablation for his recurrent VT 4 months ago. We planned again left ventricular endocardial mapping for his incessant slow VT suggesting an apical exit site (Figure 1A). However, the activation mapping of LV did not cover the whole VT cycle length, and we decide to map the right ventricular septal side instead of the epicardial access due to the patient's poor frailty. Fortunately, the mid-diastolic potential (MDP) was acquired in an unusual position (Figures 1A and 1B); however, the pericardial location of the mapping catheter was confirmed fluoroscopically (Figures 1C and 1D). An urgent surgical consultation was called for, and operative preparations were initiated. However, since no pericardial tamponade occurred and blood pressure remained stable, we continued the endo-epicardial ablation by ablating the MDP (Video 1)

Transient changes in QRS morphology during a narrow complex tachycardia: What is the mechanism?

A22‐year‐old man with recurrent episodes of tachycardia inthe absence of structural heart disease underwent an electro-physiological evaluation. A narrow complex tachycardia (NCT)was induced by programmed by ventricular pacing. A transientchange in QRS morphology and H‐V interval in the middle of thetracing was noted during ongoing tachycardia (Figure1). What arethepossiblemechanismsoftachycardia and changes in QRS morphology

Does radiation therapy affect adhesion of tricalcium silicate cements to root dentin?

Objective: This study aimed to analyze the effect of irradiation on the push-out bond strength of mineral trioxide aggregate (MTA) and Biodentine to radicular dentin. Methodology: A total of 60 extracted mature human teeth with single root canals were categorized into two groups (irradiated and non-irradiated) (n=30). Each group was further divided into two sub-groups based on cements used (Biodentine and MTA). Then, a cumulative radiation dose of 60 Gy was divided into 30 fractions (two Gy for every fraction) and administered for five successive days per week over six weeks. Obturation was then performed using MTA and Biodentine. Afterwards, 1.5 mm thick horizontal sections were procured from the middle one-third of all the specimens and then subjected to push-out bond test. Results were analyzed using one-way analysis of variance with post-hoc Tukey’s test. Results: The bond strength of Biodentine and MTA to irradiated teeth was lower than non-irradiated teeth. Highest push-out bond strength was observed in non-irradiated specimens filled with Biodentine (p=0), followed by irradiated specimens filled with Biodentine (p=0); non-irradiated specimens filled with MTA (p=0); and irradiated specimens filled with MTA (p=0.9). Conclusion: The push-out bond strength of Biodentine and MTA to root canal dentin decreased significantly post irradiation

Effect of various beverages on adhesion of repaired CAD/CAM restorative materials

(1) Background: The purpose of this study was to determine the effect of commonly consumed beverages on the bond strength of three different computer-aided design-computer-aided manufacturing (CAD/CAM) resin-ceramic hybrid materials repaired with resin-based composite (RBC) materials. (2) Materials and Methods: Rectangular prism specimens (N = 138) measuring 6 mm x 5 mm x 2 mm were obtained from GC Cerasmart (GC), Lava Ultimate (LU), and Vita Enamic (VE) blocks. These blocks were polished and then subjected to thermal cycling (10,000 cycles, 5 & DEG;C to 55 & DEG;C). After the surface treatment was applied, the average surface roughness value was measured. All the surfaces were repaired with RBC. Thermal cycling was performed for the second time. Each group was then distributed into three subgroups according to the beverage used: tea (t), cola (c), and distilled water (0) (n = 15). The specimens were stored in these solutions for 28 days and then subjected to the shear bond strength (SBS) test. Statistical analysis was performed using a two-way ANOVA test with Bonferroni adjustment. (3) Results: The surface roughness of the materials presented no significant difference after different surface treatments (p > 0.05). No significant difference was observed among the materials (p > 0.05). Tea and cola presented similar SBS values (p > 0.05). Both were significantly lower than distilled water (p < 0.001, p < 0.001, respectively). (4) Conclusions: Consumption of beverages reduces the bond strength in surfaces repaired with RBC to CAD/CAM resin-ceramic hybrid materials. (5) Clinical Significance: Repairing damaged resin matrix dental restorations with RBC is advantageous in terms of time and cost by achieving adequate bond strengths. Frequently consumed beverages reduce the bond strength of repaired CAD/CAM resin-ceramic hybrid materials

Reply to letter to the editor: '2D LGE or 3D high-resolution LGE: Role of cardiovascular magnetic resonance imaging in the treatment of ventricular arrhythmias'

We are pleased that our paper raised interest among readers of the Anatolian Journal of Cardiology. Even though the late gadolinium enhancement cardiac magnetic resonance (LGE-CMR) imaging was first established for ventricular tissue characterization in localizing ventricular tachycardia (VT) ablation targets (CMR-aided), it is by now widely used as a clinical tool to guide VT ablation (CMR-guided) through the detection of the arrhythmogenic substrate and conducting channels. While the CMR-derived information has been used alongside electroanatomic mapping (EAM) data to aid VT ablation (CMR-aided), the CMR-guided approaches, where EAM acquisition is completely avoided, make procedures faster, and the operator relies solely on imaging data.1 As the authors reported, the analysis of CMR images with software, which is known as ADAS (ADAS 3D, Barcelona, Spain), is very helpful for identifying these conducting channels.2 The preliminary results showed that the mean procedure duration was lower in CMR-guided when compared to CMR-aided and No-CMR substrate ablation (109 ± 61 vs. 206 ± 70 and 233 ± 48 minutes, respectively; P <.001 for both comparisons).1 VOYAGE is a prospective, randomized, multicenter controlled open-label study designed to compare in terms of efficacy, efficiency, and safety of a CMR-aided or guided workflow to standard EAM-guided VT ablation