Polymethylmethacrylate–graphene (PMMA/RGO) nanocomposites were prepared via in situ bulk polymerization using two different preparation techniques. In the first approach, a mixture of graphite oxide (GO) and methylmethacrylate monomers (MMA) polymerized method with free radical initiator. After addition reducing agent hydrazine hydrate (HH), product was reduced microwave irradiation (MWI) to obtain R-(GO-PMMA) composites. second sheets (RGO) MMA initiator RGO-(PMMA) The composites...

While the durability of thermoplastic aligners has been subject numerous studies, retainers received significantly less attention. Patients are often advised to wear their indefinitely, so materials used in fabrication is crucial determining whether they worth cost. Limited studies have evaluated properties retainer and effects thermocycling on mechanical properties. Thus, this study aimed examine six after thermoforming with without thermocycling. The materials' flexural modulus, hardness,...

Background: Students differ in their preferred methods of acquiring, processing, and recalling new information. The aim this study was to investigate the learning style preferences undergraduate dental students examine influence gender, Grade Point Average (GPA), academic year levels on these preferences. Methods: Arabic version visual, aural, read/write, kinesthetic (VARK) questionnaire administered 491 from first- fifth-year classes at College Dentistry, King Saud University. Descriptive...

Polystyrene-reduced graphene oxide (PSTY/RGO) composites were prepared via the in situ bulk polymerization method using two different preparation techniques. The general approach is to use microwave irradiation (MWI) enhance exfoliation and dispersion of RGO nanosheets within PSTY matrix. In first approach, a mixture GO styrene monomers (STY) polymerized facilitated by obtain R-(GO-PSTY) composites. second STY RGO-(PSTY) characterized FTIR, 1H-NMR, XRD, SEM, HRTEM, TGA DSC. results indicate...

Abstract Background Orthodontic treatment presents challenges with plaque accumulation around brackets, archwires, and elastics, leading to retained gingival inflammation. Conventional toothbrushing may not be enough, requiring additional oral hygiene aids like interproximal brushes, dental flosses, water flossers. Limited research exists on comparing flossing interdental in orthodontic patients. Therefore, this study aims assess their effectiveness maintaining during active treatment....

Aim: To overview dental magnification loupes and to present the updated scientific evidence supporting its use.Background: The practice of dentistry places considerable stress on operators' visual acuity musculoskeletal system.The use has spanned many decades with claims postural capacities professionals enhancing diagnostic procedural accuracy.Review results: Galilean prismatic both provide lightweight clinically appropriate magnifications between 2.5× 5.0×, beneficial features such as a...

Due to the fact that retainers are often recommended for a lifetime, their endurance and longevity directly related quality of materials used in production. Our study examined water sorption, solubility, Fourier transform infrared (FTIR) spectroscopy six commercially available thermoplastic retainer (Essix Plus, Zendura, Duran Tru-Tain DX, Imprelon S pd, Essix ACE). Moreover, this evaluated effect thermoforming thermocycling on sorption solubility surface molecular composition tested...

Herein, we report a facile process for the preparation of styrene and methyl-methacrylate copolymer nanocomposites containing reduced graphene oxide silver nanoparticles ((R-(GO-(PS-PMMA))/AgNPs)) by using (i) microwave irradiation (MWI) to obtain R-(GO-(PS-PMMA))/AgNPs (ii) in situ bulk polymerization technique produce RGO/AgNPs-(PS-PMMA). Various characterization techniques, including FT-IR, XPS, Raman spectroscopy, XRD, SEM, HR-TEM, DSC, TGA analysis, were used characterize prepared...

This study aimed to evaluate the associations of self-reported diabetic status with clinically assessed dental end points, including teeth untreated coronal and root caries, missing teeth, complete tooth retention, edentulism routine services utilization among adults aged ≥20 years in United States.We pooled data from 2015-2016 2017-2018 cycles National Health Nutrition Examination Survey (NHANES), a nationally representative, cross-sectional, continuous survey noninstitutionalized US...

Aim: This study investigated the knowledge of elementary school staff regarding management traumatic dental injuries (TDIs) in children. Methods: The present cross-sectional analyzed data collected between September 2016 and April 2017. sample consisted 2,027 members Riyadh, Saudi Arabia. A stratified cluster random sampling technique was used to select required sample. Those who agreed participate completed a 4-part self-administered questionnaire comprising questions demographic data, on...

Previous studies have found that first premolar extractions during orthodontic treatment may alter the upper airway dimensions. The objective of this study is to investigate effects second extraction on dimensions in a sample female adults.Twenty-nine adult patients with ages between 18 and 30 years old incisor bimaxillary protrusion were included study. They treated comprehensive which four premolars. Pre post cephalometric radiographs analyzed using Dolphin imaging software for changes...

Objective: To evaluate the effect of different surface treatment methods on shear bond strength (SBS) metal brackets bonded to two types CAD/CAM composite restorations: milled and 3D-printed. Materials Methods: A total 160 flat-shaped specimens (10×10×2 mm³) were prepared from four CAD-CAM composites; (Lava Ultimate™ [LU], Grandio™ [GR]) 3D-printed (Crowntec™ [CT] C&B Permanent™ [CB]). These underwent thermocycling (5000 cycles at 5-55 °C), then categorized based into groups (n=10):...

Historical sandstone surfaces and architectural heritage may undergo unwanted changes due to the exposure many mechanical, physical chemical deterioration factors.This paper evaluates effectiveness of inorganic compatible treatments; Based on nanoparticles silica (SiO 2 ) dispersed in silicon based product, commonly used as a water-repellent/ consolidation for decayed construction materials.The nanocomposites obtained by dispersing polymeric matrices SILRES® BS OH 100 (solventless mixtures...

This study was undertaken to evaluate the influence of changes in gingival display maxillary teeth on smile attractiveness assessed by Saudi Arabian dental professionals and laypeople. A total 138 professional 182 laypeople rated male female smiles a computerized survey. smiling photograph students were selected digitally manipulated create amount from 4 mm 4mm covered upper lip 1 increments. Each photo accompanied visual analog scale (VAS) for rating. Among professionals, 61% with 1-mm low...

Massive limestones were used in construction of ancient Egyptian tombs, temples, obelisks and other sculptures. These stones are always exposed to physico-mechanical deterioration destructive forces, leading partial or total collapse. The task reassembling this type artifacts represents a big challenge for the conservators. Recently, researchers turning new technologies improve properties traditional adhesive materials techniques re-assembly broken massive stones. epoxy resins extensively...

The aim of this study was to identify potential occupational stressors among orthodontists practicing in Saudi Arabia, and evaluate their relationship personal professional characteristics.Using a validated stress assessment (OSA) questionnaire, demographic information data pertaining characteristics the participants were collected. OSA questionnaire adopted modified based on Cooper et al. classification stressors. To assure anonymity protocol, respondents given at clinical settings or...

Abstract Objective This study examines the differences, by state, in dental care utilization and tooth retention between adults with without diabetes mellitus (DM). Methods We conducted a secondary analysis of data from 2020 Behavioral Risk Factor Surveillance System, an annual, state‐based, random telephone survey noninstitutionalized US civilian adults. The predictor variable was DM status. outcome variables were time since last appointment loss. utilized multiple multinomial logistic...

This study aimed to evaluate the efficiency of chewing gum and using bite wafers in reducing pain after placement separators orthodontic patients compare that with ibuprofen use. Additionally, this evaluated effect non-pharmacological control methods on frequency falling out. The sample comprised 105 female between 15 35 years age. were randomly selected classified into three groups (35 each). Each group was given either ibuprofen, viscoelastic wafers, or immediately every 8 h for 1 week, as...

Objective: The objective of this study was to evaluate the effect different surface treatment methods on shear bond strength (SBS) metal brackets bonded two types CAD/CAM composite restorations: milled and 3D-printed. Materials Methods: A total 160 flat-shaped specimens (10 × 10 2 mm3) were prepared from four composites; (Lava Ultimate™ [LU] Grandio™ [GR]) 3D-printed (Crowntec™ [CT] C&B Permanent™ [CB]). These underwent thermocycling (5000 cycles at 5–55 °C), then categorized based into...

Background: Orthodontics treatment aimed to make patient satisfied about result starting from appearance the function. Orthodontic retention is consider as important stage stabilize of orthodontic and avoid relapse that caused by normal age changes. Methods: A cross-sectional study performed through questionnaires. total 450 patients were included in study. The questionnaire 19 questions. consisted question socio-demographic status respondents such age, gender, also type retainer fixed or...

Juvenile dermatomyositis (JDM) is a chronic autoimmune inflammatory disorder and considered the most common form of idiopathic myopathies. JDM primarily affects skin skeletal muscles. Characteristic signs symptoms include Gottron papules, heliotrope rash, calcinosis cutis, symmetrical proximal muscle weakness. However, presenting with generalized scaly poikeloderma an unfamiliar presentation. Herein we report 14-month-old female toddler presented progressive asymptomatic mottled violaceous...