Pathways to Children's Behavioral Problems during the COVID-19 Pandemic: Fathers' Parenting Stress and Parenting Approaches.

Although the family stress model theoretically focuses on the roles of both mothers and fathers as predictors of children's outcomes, studies generally have focused on mothers. The pandemic has brought additional burdens to parents' daily functioning, including fathers' involvement in childcare. The current study aimed to examine the contributions of fathers' parenting stress and parenting approaches to their children's behavior problems during the COVID-19 pandemic.

Examining the Contributions of Parents' Daily Hassles and Parenting Approaches to Children's Behavior Problems during the COVID-19 Pandemic.

The present study was designed to examine the direct and indirect contributions of parenting daily hassles and approaches to children's externalizing and internalizing behavior problems during the COVID-19 pandemic. The sample for this study was 338 preschool children (53.6% girls, = 56.

Evaluation of adipokines and inflammatory mediator expression levels in patients with periodontitis and peri-implantitis: a cross-sectional study.

Objectives: The aim of this study was to analyze the mRNA and protein expression of adiponectin, leptin, visfatin, tumor necrosis factor (TNF)-α, and interleukin (IL)-6 levels in periodontitis and peri-implantitis sites in systemically healthy individuals and to investigate the influence of the presence of current periodontitis on their expression levels in peri-implantitis sites.

Materials And Methods: Soft tissue biopsy samples were collected from 60 systemically healthy patients [15 periodontally healthy patients (group I), 16 patients with periodontitis (group II), 15 patients with peri-implantitis (group III), and 14 patients with peri-implantitis and periodontitis (group IV)]; mRNA expression levels of adiponectin, leptin, visfatin, TNF-α, and IL-6 were measured by quantitative real-time PCR; and their protein levels were assessed by immunohistochemistry.

Results: The mRNA expression levels of all biomarkers were significantly higher for group II compared to group I, while significantly higher levels of leptin, TNF-α, and IL-6 were observed in group III in comparison with group I.

The effects of ovariectomy on ghrelin expression in the rat uterus.

Background: Ghrelin is a hormone which has effects on the secretion of growth hormone, the gastrointestinal system, the cardiovascular system, cell proliferation and the reproductive system.

Objectives: The aim of this study is to investigate structural changes in the uterine tissue and to assess ghrelin immunoreactivity in the endometrium as a result of bilateral ovariectomization of rats.

Material And Methods: In this study, 28 adult female albino Wistar rats were used.

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.