The effectiveness of each resin composite material composition in enabling homogeneous monomer conversion and reducing polymerization shrinkage (PS) is an important issue. Thus, this study aimed to evaluate the degree (DC) PS low-shrinkage bulk-fill composites (BFCs) 4-mm thickness.Four bulk fill (Tetric EvoCeram Bulk Fill, Sonic XTra Venus Fill) one conventional (Filtek Z350 XT) were tested study. Teflon molds depth used prepare specimens. All packed then light cured for recommended time by...

The present investigation aimed to prepare and evaluate an innovated re-mineralizing oral films made from a blend of hydroxyethyl-cellulose (HEC) cellulose nanofibers (CNF), loaded with nepheline fluorapatite glass powder. Evaluation film thickness, folding endurance, disintegration time, surface pH, ions release, together SEM were carried out. In vitro effect the prepared on demineralized teeth was examined. Results revealed uniformity in thickness films, endurance more than 300, times 24...

Current study aimed to evaluate the effect of different decontamination procedures on micro-shear bond strength (μSBS) sound (SoD) and caries-affected dentin (CAD) two universal adhesives after blood-saliva contamination.One hundred eighty bovine anterior teeth were prepared allocated into respective groups according tested substrates [SoD, CAD], [Clearfil Bond Universal Quick (UBQ), All-Bond-Universal (ABU)], adhesive contamination stage [none, before light-curing], [no decontamination,...

Background: The aim was to evaluate the effect of different irrigation protocols and antioxidants application on shear bond strength (SBS) two adhesive systems deep coronal dentin at temperature.Material Methods: One hundred twenty human premolar teeth were cut longitudinally in halves, then prepared specimens allocated into four main groups according protocols; Distilled water (control), Sodium hypochlorite (NaOCl) + Ethylenediamine Tetra-acetic Acid (EDTA), NaOCl Editronate (HEDP),...

Abstract Background It has been noticed that failure of composite resin restorations can be attributed to either the two following causes: fracture or secondary caries. For reason, it is mandatory formulate a restorative material with antibacterial effect. An octenidine dihydrochloride (OCT) assessed as an alternative antimicrobial material, such chlorhexidine due their higher microbicidal effect and less cytotoxicity. Objective Current study aimed add different concentrations into...

Background: The aim of this study was to evaluate the effect chlorhexidine digluconate incorporation on degree conversion an experimental adhesive resin.Material and methods: resin prepared from 70 wt% bisphenol A glycerolate dimethacrylate, 30 hydroxyethyl methacrylate, silanized SiO 2 nanofillers, 0.5% camphorquinone ethyl 4-dimethylaminebenzoate (binary photo-initiator system).Five concentrations (0, 0.5, 1, 4 wt%) were then incorporated into resin.Thirty Potassium Bromide pellets divided...

The adhesion between the resin composite and perforation repair materials critically influences treatment outcomes. This study aimed to investigate effect of different surface on bond strength composite. Ninety blocks were prepared from Mineral trioxide aggregate (MTA) Angelus, EndoSequence (ERRM) one experimental Nano-MTA (n = 30 each). Then, they divided into two subgroups according performed, which was either etching with phosphoric acid gel or air abrasion Al2O3 particles. Adhesive...

Oriental Journal of Chemistry is a peer reviewed quarterly research journal pure and applied chemistry. It publishes standard papers in almost all thrust areas current chemistry academic commercial importance. provides platform for rapid publication quality papers, reviews letters. abstracted indexed reputed National International agencies.

Background/aim Investigation of polyetheretherketone (PEEK), a new synthetic thermoplastic polymer, as an alternative for zirconia veneering frameworks, to be used with weakened abutment teeth, in cases patients parafunctional habits. This study aimed investigate the two-body wear rate and roughness PEEK by itself against human enamel.Materials methods A total six disc-shaped (n=6) specimens (10 mm diameter thickness 2 mm) were prepared. Human enamel antagonists produced sectioning 12...

To evaluate the bleached enamel shear bond strength (SBS) after antioxidants application using an experimental adhesive.Sixty sound human molars had their roots removed then cut into buccal and lingual halves mounted in acrylic blocks. Enamel bleaching was done in-office chemical agent. Specimens were arbitrarily allocated 12 groups (n=10) regarding three levels of study: two antioxidant agents [10% açai berry extract, 10% sodium ascorbate prepared gels (applied for 15-min) control group (no...

The aim of this study was to evaluate the influence different restoration techniques (immediate dentin sealing (IDS) techniques) and cavity designs on cuspal deflection posterior teeth that were restored with resin composite inlays. Sixty caries-free extracted maxillary premolars selected equally divided into two experimental groups. Group D1: MOD cavities prepared. D2: gingival steps. Each group subdivided three subgroups (n = 10) as follows: inlay without IDS; IDS adhesive system; system...

<title>Abstract</title> The authors have requested that this preprint be removed from Research Square.

Abstract Background This study aims to determine the smear layer removal from root canals using different irrigant solutions with diode laser. Methods A set of sixty human upper incisor teeth were chosen. Access cavity preparation was done followed by canal instrumentation. Samples divided into six groups (Group A: sodium hypochlorite NaOCl, Group B: NaOCl + laser, group C: EDTA ethylene diamine tetra-acetic acid solution, D: E: garlic extract, F: extract Examining at coronal, middle and...

Abstract Background The objective of the study was to prepare and assess novel remineralizing oral films loaded with fluorapatite powder composed a combination hydroxyethyl cellulose (HC) nanofibers (CF). Methods Three concentrations prepared nano-fluorapatite were tried tested after loading in blends using solvent cast technique. Along SEM, measurements thickness film, bending tolerance, time disintegration, surface pH release ions made. produced film’s ability remineralize demineralized...

Abstract Background This research assessed two materials to be used as endodontic sealing material. The setting time, pH change, calcium ions release, microhardness and push-out bond strength were compared. Methods In this in vitro experimental study, comparison was done between: one commercial perforation repair material MTA Angelus Nano-MTA. For each material, testing for time using Vicat apparatus, measurement of values established by meter, the discharged measured at 1 day, week 4 weeks...

Background: The aim of this study was to evaluate the effect two different concentrations titanium dioxide nano particles TiO2NP on color and surface roughness enamel surface. Material methods: 20 bovine anterior teeth were selected. Each tooth divided into equal halves distributed groups A B. Group A: one half is subjected bleaching agent (AI) other mixed with 5% (AII). B: (BI) 10% (BII). Surface (Ra) changes evaluated using stereomicroscope spectrophotometer. Results: There no...

BACKGROUND: One of the important parameters in assessing definitive physical, mechanical, and biological characteristics resin composites is degree conversion (DC), as composite qualities have been proven to improve with increasing DC after photo-polymerization. Besides, fracture or secondary caries are most common causes failure. Accordingly, this reflects need formulating dental restorative materials possessing antibacterial activity. AIM: This study was designed incorporate different...

Anthropometric measurements of the lip and mouth are great importance in clinical dysmorphology as well reconstructive plastic surgery. In this study, philtrum length (PhL) intercommissural distance (ICmD) nomograms for Egyptian children mixed dentition period were established. A group 1,338 students primary schools (735 boys 603 girls) included study. The at their ages ranged from 7 to 12 years. norms PhL ICmD developed with significant sex difference certain groups. ratio between was...

Purpose:The objective of this study was to prepare an experimental dental composite resin core material loaded with prepared nanotitanium dioxide fillers and evaluate the compressive strength experimentally materials Materials methods: dioxidefillers, commercial nanosilica were used as a filler added matrix commercially available Nexcomp control.Preparation characterization through following techniques: X-ray diffraction (XRD) analysis, Fourier transform infrared (FTIR) spectroscopy Scanning...

Purpose: the aim of this study was to assess effect silanized silicon dioxide and titanium nanoparticles loading on compressive strength experimentally prepared resin composite core material.Materials Methods: Resin matrix by adding 70 wt% Bis-GMA,30 TEGDMA, 0.5 CQ EDAB.Sintering silica performed then sintered fillers together with were mixed matrix.Specimens experimental control in split Teflon moulds (4x6mm) for testing using universal machine.Results: There no statistically significant...

Aim: The aim of this study was to assess the effect using turmeric powder extract on changes tooth color with extra-coronal and intra-coronal bleaching methods. Materials Methods: Turmeric weighted mixed two different hydrogen peroxide concentrations (3% 6%) be used as a agent. Thirty teeth were allocated into three groups (n = 10): Group A: agent (6%) applied labial surface, B: (3%) inside pulp chamber, C: extra- techniques (6% 3%, respectively). A standardized access cavity opened in...