The Effect of Tamsulosin on Iris Morphology, Ciliary Muscle Thickness, and Pupil Diameter.

Purpose: To investigate the effect of tamsulosin on iris morphology, ciliary muscle thickness (CMT), pupil diameter (PD), and pupil responses to light using anterior segment optical coherence tomography and corneal topography.

Design: Prospective clinical before-and-after study METHODS: The right eyes of 43 patients with newly diagnosed benign prostatic hyperplasia were included in this study. Iris dilator muscle region (DMR) thickness, sphincter muscle region (SMR) thickness, DMR/SMR ratio, PD (scotopic, mesopic and photopic light conditions), CMT1 (1 mm posterior to the scleral spur), CMT2 (2 mm posterior to the scleral spur), CMT3 (3 mm posterior to the scleral spur) and anterior chamber depth (ACD) were measured before and after dilation.

The Accuracy of Intraoral Scanners in Maxillary Defects with Different Model Variations.

Advances in digital technology and intraoral scanners (IOSs) have the potential to enable accurate digital impressions for patients with maxillary defects. This study aimed to compare the accuracy of IOSs in completely and partially edentulous models with maxillary defects. Three polyurethane models-one completely edentulous (CE) and two partially edentulous, following Aramany classifications I (ACI) and II (ACII)-were created using stereolithography.

The effects of different lighting conditions on the accuracy of intraoral scanning.

Purpose: This study aimed to investigate the extent to which intraoral scanning are affected by clinical conditions, and whether ambient lighting and different color temperatures have an impact on the accuracy of intraoral scanner, as well as to evaluate scanning time.

Materials And Methods: Twelve different environments were created using various ambient lighting conditions (0, 500, 1000 and 1500 lux) and color temperatures (white, blue and yellow). A partially edentulous mandibular model with two implants and a three-unit bridge was scanned under each environment until 10 digital models were obtained, and scanning times were recorded using a virtual stopwatch.

Comprehensive analysis of lateral nasal wall anatomy to optimize the osteotomy in different skeletal patterns.

Purpose: Variations in nasal wall anatomy are crucial in patients with dentofacial deformities undergoing Le Fort I osteotomy. These structural variations heighten the potential for complications during surgical procedures. Hence, the study focused on evaluating the differences in the lateral nasal wall anatomy across different skeletal Classes.

Peripapillary and macular vascular densities in healthy, ocular hypertensive, and different stages of glaucomatous eyes.

Aim: To investigate vascular changes in different stages of glaucoma and to evaluate the role of optical coherence tomography angiography (OCTA) in the early diagnosis of glaucoma.

Methods: Glaucoma patients and healthy controls (=29 eyes) were investigated in this cross-sectional comparative study. Glaucoma patients were grouped as ocular hypertension (=44 eyes), preperimetric glaucoma (PPG; =32 eyes), early glaucoma (EG; =35 eyes), moderate stage glaucoma (MG; =36 eyes), and advanced glaucoma (AG; =35 eyes).

Effects of 16% Carbamide Peroxide on Optical Properties of Thermally Aged Monolithic CAD-CAM Glass Ceramics with Different Surface Treatments.

This study aimed to investigate the effects of 16% carbamide peroxide (CP) on the relative translucency parameter (RTP) and color stability of thermally aged CAD-CAM glass-ceramics with glazing or polishing. Three different CAD-CAM blocks-feldspathic (VM), lithium disilicate (IPS), and zirconia-reinforced lithium silicate ceramic (VS)-were used in this study. The specimens were divided into two groups (n=10) according to surface treatments (glazing or polishing).

Effect of different surface treatments on the biaxial flexural strength of zirconia ceramics.

Statement Of Problem: Different surface treatments have been applied to zirconia restorations in clinical practice to increase the bond strength between zirconia and cement, but their effect on flexural strength is unknown.

Purpose: The purpose of this in vitro study was to evaluate the effect of different surface treatments before and after sintering on the flexural strength of zirconia.

Material And Methods: Sixty disk-shaped specimens with an initial diameter of 18.

Multisystem inflammatory syndrome in children during severe acute respiratory syndrome coronavirus-2 pandemic in Turkey: A single-centre experience.

Aim: Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection may result in a life-threatening hyperinflammatory condition named multisystem inflammatory syndrome in children (MIS-C). We aimed to assess demographics, clinical presentations, laboratory characteristics and treatment outcomes of patients with MIS-C.

Methods: We performed a retrospective study of patients with MIS-C managed between August 2020 and March 2021 at Dr.

Bilateral Acute Anterior Uveitis and Corneal Punctate Epitheliopathy in Children Diagnosed with Multisystem Inflammatory Syndrome Secondary to COVID-19.

: To report bilateral anterior uveitis and corneal punctate epitheliopathy in children with multisystem inflammatory syndrome (MIS-C) secondary to coronavirus disease (COVID-19).: Five patients who were positive for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibodies and diagnosed with MIS-C were evaluated. Ophthalmologic examinations were performed in order to reveal ocular findings in MIS-C disease.

Peripapillary and Macular Vessel Density Measurement With Optical Coherence Tomography Angiography in Exfoliation Syndrome.

Precis: Although peripapillary retinal nerve fiber layer thickness (RNFLTs) and vessel density (VD) values were similar to healthy group, eyes with exfoliation syndrome had significantly lower superficial macular VDs and minimum ganglion cell analysis values.

Purpose: To compare peripapillary and macular perfused capillary densities with optical coherence tomography angiography (OCT-A) between patients with eyes having exfoliation syndrome (XFS) and normal age-matched healthy controls.

Patients And Methods: This cross-sectional study included patients diagnosed with XFS from December 2017 to January 2020 at the Glaucoma Department.

Spectral domain optical coherence tomography findings of patients with ankylosing spondylitis.

Purpose: The aim of this study is to evaluate the possible effects of (ankylosing spondylitis) AS on choroidal thickness (CT) and other retinal layers using spectral domain optical coherence tomography (SD-OCT).

Methods: This cross-sectional study group comprised 41 AS patients and age and sex-matched 46 control subjects. None of our patients had active anterior uveitis during the measurements.

Effect of sintering parameters on the mechanical properties of monolithic zirconia.

Zirconia restorations with high mechanical properties are the current treatment options for fixed restorations with advantages of high biocompatibility and low pulp irritation. Although the effect of sintering time and temperature on the optical and mechanical properties of zirconia core material were investigated, the effect of these parameters on the translucent monolithic zirconia is still uncertain. This study aimed to evaluate the effect of the changes in sintering temperature and holding time on the mechanical and structural properties of monolithic zirconia.

Influence of bleaching agents on the color change and translucency of resin matrix ceramics.

Objective: The aim of this study was to investigate the color change, translucency, and whiteness index of three different resin matrix ceramics and a resin composite subjected to different bleaching agents.

Materials And Methods: Twenty disc-shaped specimens (A2 shaded) for three different resin matrix ceramic brands (Groups Ena, Ulti, and Cera) (totally 60) were prepared using the CAD/CAM technique and 20 nanofiller composite specimens (Group Comp) (A2 shaded) with the same dimensions were prepared as the control group. The color change (∆E ), relative translucency parameter (RTP), and whiteness index (WI ) of the specimens initial and after different bleaching procedures (home-bleaching and office-bleaching) were calculated using ∆E , TP , and WI formulas.

The Diagnostic Ability of Ganglion Cell Complex Thickness-to-Total Retinal Thickness Ratio in Glaucoma in a Caucasian Population.

Objectives: To evaluate the diagnostic accuracy of the macular ganglion cell complex-to-total retinal thickness (G/T) ratio in a Caucasian population.

Materials And Methods: A total of 86 patients were enrolled in this cross-sectional study. Patients were divided into 4 groups: healthy; ocular hypertension; preperimetric glaucoma; and early glaucoma.

Influence of heating rate on the flexural strength of monolithic zirconia.

Purpose: Fabrication of zirconia restorations with ideal mechanical properties in a short period is a great challenge for clinicians. The purpose of the study was to investigate the effect of heating rate on the mechanical and microstructural properties of monolithic zirconia.

Materials And Methods: Forty monolithic zirconia specimens were prepared from presintered monolithic zirconia blanks.

Repair bond strength of composite to Er,Cr:YSGG laser irradiated zirconia and porcelain surfaces.

Background: Fracture or chipping are major concerning failures of an all-ceramic restoration. Repairing of the failure restoration using intra-oral technique is time saving and cost effective treatment modality. The present study was proposed to evaluate effect of Er,Cr:YSGG laser irradiation on shear bond strength between zirconia/porcelain and composite resin.

Gallic and carnosic acids improve quality of frozen-thawed ram spermatozoa.

The objective was to determine effects of gallic acid (GA) and carnosic acid (CA), present in carob pods and rosemary extract respectively, on frozen-thawed ram spermatozoa. Thirty ejaculates were collected from five Merino rams, pooled, diluted in Tris-based extender and divided into five equal portions containing: 0.05 or 2 mM of GA; 0.

DNA damaging effect of paclitaxel in the epididymal sperms as a chemotherapeutic agent and possible remedies to prevent this effect: A study on reproductive potential of male cancer patients of reproductive age.

Cancer is a major public health problem, young cancer patients therefore undergo chemotherapy, and most of them may lose their fertility. DNA damage level provides important clues about the quality and reproductive potential of spermatozoa. In this study, we evaluated the levels of both DNA fragmentation and abnormal DNA integrity in the epididymal sperms of New Zealand rabbit (Oryctolagus cuniculus) after cryopreservation using the terminal deoxyribonucleotidyl transferase-mediated dUTP nick end-labelling (TUNEL) assay and the toluidine blue (TB) staining methods and assessed the effects of paclitaxel, resveratrol, l-glutamine (LG), and basal medium eagle (BME) solution on DNA damage.

Evaluation of the fracture resistance of root filled thin walled teeth restored with different post systems.

Background: Restoration of the teeth with extensive root canals with different post systems is a challenge for clinicians. Evaluation of these systems is important for clinical success. The aim of this study was to compare the fracture resistance and fracture mode of endodontically treated thin-walled teeth which restored with different post systems.

Influence of different surface finishing techniques on machinable feldspathic and leucite-reinforced ceramics.

The effect of surface finishing techniques on machinable ceramics to obtain optimum smoothness is unclear. The aim of the study was to evaluate the effects of surface finishing techniques on machinable feldspathic and leucite-reinforced ceramics. Forty specimens were divided into four subgroups according to surface finishing techniques and ceramic structure.

Evaluation of quality of life after implantation of a new trifocal intraocular lens.

Purpose: To evaluate the vision-related quality of life (QOL) after implantation of a new trifocal intraocular lens (IOL), by using the National Eye Institute Visual Function Questionnaire-14 (VF-14 QOL questionnaire).

Setting: Baskent University Faculty of Medicine, Department of Ophthalmology, Ankara, Turkey.

Design: Prospective noncomparative case series.

Bilateral Asymmetric Rhegmatogenous Retinal Detachment in a Patient with Stickler Syndrome.

Here we present the long-term anatomical and visual outcomes of bilateral asymmetric rhegmatogenous retinal detachment repair in a patient with Stickler syndrome. A 17-year-old girl presented with decreased visual acuity in both eyes for more than one year. Her best-corrected visual acuity (BCVA) was 0.

Evaluation of the retention characteristics of various stud attachment systems for implant retained overdenture.

Purpose: The purpose of the study was to analyze and compare retention characteristics of different stud attachments including a standard and two low profile attachments on two implant embedded test models.

Methods: Three different stud attachment systems (Ball attachment and two different low profile stud attachments - Equator and Locator) were used in this study. Two dental implants were placed vertically into a custom-made acrylic resin block within a 22 mm distance.

Effects of arginine and trehalose on post-thawed bovine sperm quality.

The present study was conducted to examine the protective role of arginine and trehalose on post-thaw bull sperm and oxidative stress parameters. Five ejaculates for each bull were used in the study. Each ejaculate, split into three equal aliquots and diluted at 37 °C with base extenders containing 2 mM arginine, 25 mM trehalose and no antioxidant (control) was cooled to 5 °C and then frozen.