Publications by authors named "Al-Qahtani N"

Polyetheretherketone (PEEK) has emerged as a revolutionary material in modern dentistry because of its unique combination of mechanical strength, biocompatibility, and versatility. This literature review examines the current applications and future potential of PEEK in various dental disciplines. PEEK's favorable properties, including its low specific weight, high strength-to-weight ratio, and ability to be easily machined, have led to its adoption in prosthetics, implantology, and dental esthetic restorations.

View Article and Find Full Text PDF

Introduction: Appendiceal mucinous neoplasms (AMNs) represent a rare and diagnostically challenging group of tumors. This systematic review aims to summarize the reported molecular and immunohistochemical markers (IHC) associated with AMNs and compare them with ovarian mucinous neoplasms (OMNs) and colorectal adenocarcinoma (CRC).

Methods: A comprehensive search was performed in PubMed/MEDLINE/PMC, Scopus, Embase, and Web of Science databases to identify studies looking at IHC and molecular markers in AMNs.

View Article and Find Full Text PDF

The increasing number of individuals with limb loss worldwide highlights the need for advancements in prosthetic knee technology. To improve control and quality of life, integrating brain-computer communication with motor imagery offers a promising solution. This study introduces a hybrid system that combines electromyography (EMG) and functional near-infrared spectroscopy (fNIRS) to address these limitations and enhance the control of knee movements for individuals with above-knee amputations.

View Article and Find Full Text PDF
Article Synopsis
  • Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disease affecting synovial joints, often linked to environmental factors and genetics, characterized by both joint and extra-articular symptoms.
  • The review explores the therapeutic potential of natural products in managing arthritis through three methodologies: in-silico analysis identifies molecular targets, in-vivo studies assess safety and effectiveness in reducing inflammation, and in-vitro studies examine cellular interactions and signaling pathways.
  • Overall, the study suggests that natural compounds could serve as valuable adjuncts to traditional RA treatments, highlighting their anti-inflammatory properties and the need for further research to enhance their therapeutic benefits.
View Article and Find Full Text PDF
Article Synopsis
  • This study analyzed the reliability of manual segmentation for paraspinal muscle cross-sectional area (CSA) using axial-T2-weighted MRI at three intervertebral levels (L3/4, L4/5, L5/S1).
  • The research involved 238 patients and five raters, assessing both intra-rater and inter-rater reliability, with low variability and excellent reliability scores found for several muscle groups.
  • Results indicate that while manual segmentation is generally reliable, factors like fat infiltration and muscle size can affect accuracy, suggesting that following consistent guidelines could enhance segmentation outcomes.
View Article and Find Full Text PDF

The rapid emergence of antibiotic-resistant microorganisms and the demand for sustainable water purification methods have spurred research into advanced disinfection, with photocatalysis as a promising approach. This study explores magnetic nanomaterials as catalysts in photocatalytic processes for microorganism inactivation. Magnetic nanoparticles and composites, due to their unique properties, are promising for enhancing photocatalytic disinfection.

View Article and Find Full Text PDF
Article Synopsis
  • - Undernutrition is a critical issue in low-income countries like Yemen, where recent conflicts have worsened conditions for children, leading to higher rates of wasting, stunting, and underweight.
  • - A study in the Jiblah district examined 120 children aged six months to five years, revealing that almost half experienced wasting, with key risk factors identified including age, gender, low birthweight, and household conditions.
  • - Understanding these risk factors is essential for raising awareness and potentially guiding international policy to address ongoing nutritional challenges faced by children in Yemen.
View Article and Find Full Text PDF

Ocular drug delivery presents significant challenges due to intricate anatomy and the various barriers (corneal, tear, conjunctival, blood-aqueous, blood-retinal, and degradative enzymes) within the eye. Lipid-based nanoparticles (LNPs) have emerged as promising carriers for ocular drug delivery due to their ability to enhance drug solubility, improve bioavailability, and provide sustained release. LNPs, particularly solid lipid nanoparticles (SLNs), nanostructured lipid carriers (NLCs), and cationic nanostructured lipid carriers (CNLCs), have emerged as promising solutions for enhancing ocular drug delivery.

View Article and Find Full Text PDF

Infertility is a common issue that threatens couples worldwide. Infertility can result from the male or female partner alone, or both partners. It can be due to multiple factors related to the patient's overall health or lifestyle.

View Article and Find Full Text PDF

Objective:  The aim is to coat orthodontic brackets with two different bioactive materials and to compare the mechanical and morphological properties of coated brackets and tooth surfaces.

Materials And Methods:  A total of 120 stainless steel brackets were divided equally into three groups, that is, the uncoated brackets and nanohydroxyapatite (nHA)-coated, and nanobioactive glass (nBG)-coated brackets using a spin coater machine. The brackets were bonded on the enamel surface and underwent remineralization/demineralization cycles for days 1, 7, 14, and 30.

View Article and Find Full Text PDF

The global rise in lower limb amputation cases necessitates advancements in prosthetic limb technology to enhance the quality of life for affected patients. This review paper explores recent advancements in the integration of EEG and fNIRS modalities for smart lower prosthetic limbs for rehabilitation applications. The paper synthesizes current research progress, focusing on the synergy between brain-computer interfaces and neuroimaging technologies to enhance the functionality and user experience of lower limb prosthetics.

View Article and Find Full Text PDF

Background: The incorporation of digital health technologies in undergraduate teaching, such as the MyDispense program, provides a simulated opportunity to support students' competency development in dispensing tasks.

Objective: This study aimed to evaluate the impact of using MyDispense, an online pharmacy simulation platform, on pharmacy students' self-reported reaction, learning, and accuracy in performing dispensing tasks.

Methodology: 16 MyDispense cases simulating real-practice scenarios from prescription dispensing and verification to patient counseling were created for 55 professional year 1 pharmacy students as part of a professional skills course.

View Article and Find Full Text PDF

Urolithiasis, characterized by the formation of solid crystalline structures within the urinary tract, presents a significant global health burden with high recurrence rates and limited treatment efficacy. Recent research has identified various protein receptors and enzymes implicated in the pathogenesis of urolithiasis, offering potential targets for therapeutic intervention. Protein receptors such as the calcium-sensing receptor and vasopressin V2 receptor play crucial roles in regulating urinary calcium excretion and water reabsorption, respectively, influencing stone formation.

View Article and Find Full Text PDF

Objectives: The aim of this study is to evaluate the effect of different surface treatments on the shear bond strength (SBS) of clear aligner attachments bonded to Bis-acryl provisional crowns.

Methods: 120 cylindrical bisacrylic composite material (ProTemp type) specimens were prepared and divided into six groups ( = 20) based on surface treatment, control: (no treatment); super coarse grit diamond bur, carbide bur, alumina-blasting, non-thermal plasma treatment, and Er:YAG laser treatment. The features of treated surfaces were examined using scanning electron microscopy (SEM).

View Article and Find Full Text PDF

Silver oxide (AgO) particles are wonderful candidates due to their unique properties, and their use in a wide range of research, industrial and biomedical applications is rapidly increasing. This makes it fundamental to develop simple, environmentally friendly methods with possible scaling. Herein, sodium borohydride and leaf extract were applied as chemical and biological stabilizing and reducing agents to develop AgO particles.

View Article and Find Full Text PDF

This study successfully synthesized ZnO-CuO nanocomposite using the hydrothermal method with Carica papaya leaf extract. The incorporation of the leaf extract significantly enhanced the nanocomposite properties, a novel approach in scientific research. Characterization techniques, including X-ray diffraction, Fourier Transmission Infrared spectroscopy, and Scanning Electron Microscopy with Energy Dispersive X-Ray Analysis, confirmed a cubic crystal structure with an average size of 22.

View Article and Find Full Text PDF

The relationship between diabetes and dental caries remains uncertain. The main objective of this study was to quantify dental caries in children and adolescents with and without poorly-controlled diabetes to examine whether poorly-controlled diabetes influences caries prevalence and severity. This was a case-control study of children and adolescents with poorly-controlled diabetes and age-matched controls attending paediatric clinics at Sheikh Shakhbout Medical City, Abu Dhabi, UAE in August 2022.

View Article and Find Full Text PDF

Accurate channel state information (CSI) is crucial for optimizing wireless communication systems. In scenarios with varying user-to-base station angles, the angle-dependent coherence time impacts conventional pilot strategies. Due to small angles, the coherence time of the user decreases dramatically because of doppler shift, which causes an increase in the number of pilots.

View Article and Find Full Text PDF

Bilayer electrospun fibers aimed to be used for skin tissue engineering applications were fabricated for enhanced cell attachment and proliferation. Different ratios of PHBV-PLLA (70:30, 80:20, and 90:10 /) blends were electrospun on previously formed electrospun PHBV membranes to produce their bilayers. The fabricated electrospun membranes were characterized with FTIR, which conformed to the characteristic peaks assigned for both PHBV and PLLA.

View Article and Find Full Text PDF

The economic impact of Human Immunodeficiency Virus (HIV) goes beyond individual levels and it has a significant influence on communities and nations worldwide. Studying the transmission patterns in HIV dynamics is crucial for understanding the tracking behavior and informing policymakers about the possible control of this viral infection. Various approaches have been adopted to explore how the virus interacts with the immune system.

View Article and Find Full Text PDF

Ethylene Glycol (EG) and diethylene Glycol (DEG) are two contaminants known to cause various human health problems. These glycols might be present in drug syrups that are based on glycerol, sorbitol, or polyethylene glycol. In late 2022, several batches of cough, antipyretics, and antihistamine syrups were reported to contain toxic levels of EG and DEG in multiple countries; this incident concerned the World Health Organization (WHO).

View Article and Find Full Text PDF

Corrosion-related damage incurs significant capital costs in many industries. In this study, an anti-corrosive pigment was synthesized by modifying calcium carbonate with sodium alginate (SA), and smart self-healing coatings were synthesized by reinforcing the anti-corrosive pigments into a polyolefin matrix. Structural changes during the synthesis of the anti-corrosive pigment were examined using scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis.

View Article and Find Full Text PDF

Objectives: This study aimed to present the magnitude and determinants of awareness about refractive surgery among the adult Saudi population and recommend knowledge improvement.

Methods: This web-based cross-sectional study was conducted between June 2020 and May 2021 across various regions of Saudi Arabia on the adult Saudi population. A total of 11 close-ended questions regarding indication, contraindication, preparation and surgery procedures were asked.

View Article and Find Full Text PDF

The study involves a collection of data from the published article titled "Active sites engineered biomass-carbon as a catalyst for biodiesel production: Process optimization using RSM and life cycle assessment "" journal. Here, the activated biochar was functionalized using 4-diazoniobenzenesulfonate to obtain sulfonic acid functionalized activated biochar. The catalyst was comprehensively characterized using XRD, FTIR, TGA, NH-TPD, SEM-EDS, TEM, BET, and XPS analysis.

View Article and Find Full Text PDF

Background Molar pregnancy (MP) incidence and clinical presentation vary significantly worldwide. Recent trends show changes in its clinical representation and incidence, particularly with the adoption of early diagnosis using first-trimester ultrasonography, which has reduced the prevalence of classical second-trimester presentations. This study aimed to analyze the changes in clinical presentation and incidence of MP among the Saudi population over the past 30 years.

View Article and Find Full Text PDF