This in vitro study evaluated the flexural strength, impact hardness, and surface roughness of 3D-printed denture base resin subjected to thermal cycling treatment.According ISO 20795-1:2013 standards, 120 acrylic specimens (40/flexural strength test, 40/impact 40/surface hardness n = 10) were fabricated distributed into two groups: heat-polymerized; (Major.Base.20) as control (NextDent) experimental group. Half each group 10,000 cycles 5 55°C simulating 1 year clinical use. Flexural (MPa),...

Polymethyl methacrylate (PMMA) is widely used for the fabrication of removable prostheses. Recently, zirconium oxide nanoparticles (nano-ZrO2) have been added to improve some properties PMMA, but their effect on optical and tensile strength are neglected.The aim this study was investigate nano-ZrO2 addition translucency PMMA denture base material.Eighty specimens (40 dumbbell-shaped 40 discs) were prepared out heat-polymerized acrylic resin divided into four groups per test (n=10). The...

Background: Repeated fracture of the denture base is a common problem in prosthodontics, and it represents nuisance time sink for clinician. Therefore, possibility increasing repair strength using new reinforcement materials great interest to prosthodontists. Aim study: This study aimed evaluate effects incorporation zirconia nanoparticles (nano-ZrO 2 ) on flexural impact repaired polymethyl methacrylate (PMMA) bases. Materials methods: One hundred eighty specimens heat-polymerized acrylic...

Inhibitory effect of zirconium oxide nanoparticles on Candida albicans adhesion to repaired polymethyl methacrylate denture bases and interim removable prostheses: a new approach for stomatitis prevention Mohammed M Gad,1 Ahmad Al-Thobity,1 Suliman Y Shahin,2 Badar T Alsaqer,3 Aiman A Ali4,5 1Department Substitutive Dental Sciences, 2Department Preventive College Dentistry, 3Department Microbiology, Medicine, 4Department Biomedical University Dammam, Saudi Arabia; 5Oral Pathology Toronto,...

This study is aimed at evaluating the hybrid reinforcement effects of zirconium oxide nanoparticles (nano-ZrO2) and glass fibers (GFs) different ratios on flexural impact strengths a polymethylmethacrylate (PMMA) denture base. A total 160 specimens were fabricated from heat-polymerized acrylic resins using water bath technique. For control group, did not receive any additions; for test concentrations nano-ZrO2/GFs 5% PMMA polymer added. The as follows: 5%-0%, 4%-1%, 3%-2%, 2.5%-2.5%, 2%-3%,...

Abstract Purpose To evaluate and compare the surface properties (roughness hardness) of poly(methylmethacrylate) denture base material modified with zirconium dioxide (ZNPs), silicon (SNPs), diamond (DNPs) nanoparticles. Materials methods Two hundred sixty heat‐polymerized acrylic resin disks (15 × 2 mm) were prepared. ZNPs, SNPs, DNPs added in concentrations 0%, 0.5%, 1.0%, 2.5%, 5.0% by weight powder. This yielded a total 13 groups for each test according to filler type concentration (n =...

Polymerization techniques have been modified to improve physical and mechanical properties of polymethylmethacrylate (PMMA) denture base, as the laboratory procedures that facilitate construction techniques. The purpose present study was investigate effect autoclave polymerization on flexural strength, elastic modulus, surface roughness, hardness PMMA base resins.Major Base Vertex Implacryl heat-polymerized acrylic resins were used fabricate 180 specimens. According technique, tested groups...

Candida albicans is the main causative pathogen of denture stomatitis, which affects many complete patients.To evaluate effect different concentrations nanodiamonds (NDs) added to polymethyl methacrylate (PMMA) base material on adhesion as well surface roughness and contact angle.Acrylic resin specimens sized 10×10×3 mm3 were prepared divided into four groups (n=30) according ND concentration (0%, 0.5%, 1%, 1.5% by wt). Surface was measured with a profilometer, angle goniometer. The NDs...

This study aimed to investigate the effects of nanoparticles (zirconium dioxide (ZrO2), titanium (TiO2), and silicon (SiO2)) on flexural strength, impact hardness, wear resistance acrylic resin denture base material.Acrylic specimens were fabricated in dimensions according American Dental Association (ADA) specifications per test. Specimens divided nanofiller into four groups; unmodified as control, ZrO2 (Z), TiO2, (T), SiO2 (S) groups. Each one was subdivided two subgroups nanoparticle...

This in vitro investigation aimed to compare the trueness, precision, internal fit, and marginal adaptation of Varseo Smile Crown Plus (VSCP), CROWNTEC (C), milled Enamic crowns (E) using a 5-axis dental milling machine (prograMill PM7). 39 (VSCP, E, C; n = 13) were designed fabricated. Internal/marginal adaptation, trueness assessed via die scans with/without fit checker. Dimensional discrepancies determined by superimposing scans. One-way ANOVA (α 0.05) analyzed results. No significant...

Abstract Purpose To evaluate the effect of addition different concentrations thymoquinone (TQ) on flexural strength, elastic modulus, surface roughness, and hardness PMMA denture base material. Materials Methods A total 160 rectangular specimens were prepared from heat‐polymerized acrylic resin, with dimensions 65 × 10 2.5 mm 3 for strength testing 20 property testing. The divided into eight groups specimens: one control group without TQ seven test by adding to powder in 0.5, 1, 1.5, 2, 2.5,...

Abstract Purpose To evaluate the effect of several denture cleansing solutions on color stability, surface roughness, and flexural strength three base materials. Materials Methods Twenty‐seven specimens were prepared using heat‐polymerized (HP) material, 27 autopolymerized (AP) visible‐light‐polymerized (VLP) base, creating a total 81 specimens. The randomly divided into groups (n = 27): distilled water group (DWG), Corega (CG), Renew (RG). Color changes (ΔE), roughness (Ra, nm), (MPa) each...

BACKGROUND:Many novel biomaterials have been incorporated in toothpastes to promote remineralization of tooth structure. OBJECTIVES:This study was carried out compare the discrepancies between declared and actual total fluoride (TF) or soluble (TSF) concentration two modern too thpastes containing bioactive glasses; these were also assessed for their potential. MATERIALS AND METHODS:The TF TSF using a ion selective electrode. Enamel evaluated through micro-hardness analysis. Eighteen enamel...

To evaluate and compare the effects of glass fiber (GF), Zirconium oxide nanoparticles (nano-ZrO2 ), silicon dioxide (nano-SiO2 ) addition on flexural strength impact repaired denture base material.Heat-polymerized acrylic resin specimens were fabricated. All sectioned centrally beveled creating 2.5 mm repair gap except for 10 controls. Specimen grouping (n = 10/group) was done according to filler concentration 0%, 0.25%, 0.5%, 0.75% auto-polymerized powder. Modified mixed, packed in gap,...

This study assessed the impact of surface treatments and repair resin reinforcement with zirconium oxide nano-particles (nano-ZrO2) on flexural strength (FS) repaired denture base. A total 320 heat-polymerized acrylic specimens were prepared sectioned creating 2-mm gap. According to treatment, distributed into four groups: I) methyl methacrylate (M); II) alumina-blasted (AB); III) AB+silane coupling agent (SC); IV) AB+methacrylate based composite bonding (MA). Groups subdivided 4 (n=20)...

This study aimed to evaluate the influence of different salivary pH on flexural strength, hardness, and surface roughness computer-aided design manufacturing (CAD/CAM) milled three-dimensional (3D)-printed denture base resins. One heat-polymerized, two CAD/CAM (IvoCad, AvaDent), 3D-printed (FormLabs, NextDent) resins were fabricated divided into five groups (n = 10) according solutions: three immersed in (5.7, 7.0, or 8.3), one group was distilled water (DW) as a positive control, had no...

The current study evaluated the effects of autoclave polymerization both with and without glass fiber (GF) reinforcement on surface roughness hardness acrylic denture base material. Ninety disc specimens (30×2.5 mm) were prepared from Vertex resin divided according to techniques into a water bath, short long groups. Tested groups three subgroups GF concentration (0, 2.5, 5 wt%). Profilometer Vickers tests performed measure hardness. ANOVA Tukey-Kramer multiple comparison analyzed results,...

Candida albicans adhesion and proliferation on denture bases may lead to stomatitis, which is a common recurrent problem in wearers. The goal of this study was assess the inhibitory effect thymoquinone incorporated polymethyl methacrylate base material against albicans. Eighty acrylic resin specimens were fabricated divided into eight groups (n = 10) according concentrations 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 5% powder. Two methods used evaluate albicans: slide count serial dilution test. A...

The objective of this study was to evaluate the effect nano-SiO2 addition on flexural strength (FS) repaired acrylic denture base. Heat-polymerized resin specimens were fabricated in dimensions (65 × 10 2.5 ± 0.1 mm3 ) and then sectioned prepared, creating repair gap with butt (90 degrees) bevel (45 surface designs forming two main groups according joint design. Further subdivision done into four (n = 10) concentration: one unmodified group three modified (0.25, 0.5, 0.75 wt %)...

Denture care and maintenance are necessary for both denture longevity underlying tissue health. However, the effects of disinfectants on strength 3D-printed base resins unclear. Herein, distilled water (DW), effervescent tablet, sodium hypochlorite (NaOCl) immersion solutions were used to investigate flexural properties hardness two (NextDent FormLabs) compared with a heat-polymerized resin. The elastic modulus investigated using three-point bending test Vickers before (baseline) 180 days...

Abstract Purpose To evaluate the flexural strength, elastic modulus, microhardness, and surface roughness of monolithic zirconia, lithium disilicate ceramics, feldspathic ceramics after being exposed to different acidic solutions. Materials Methods Rectangular specimens (n = 180) were prepared from three ceramic materials: disilicate, porcelain. Initial Surface ninety 30/material) was evaluated using an optical noncontact profilometer. Thirty each material immersed in one following solutions...