This study aimed at assessing the mechanical properties and degradation of commercial bioactive materials. The materials (Activa Bioactive Restorative, Beautifil Flow Plus F00, F03, Predicta Bulk Bioactive) composite resin Filtek Supreme were submitted to flexural diametral tensile strength tests (FS, DTS), modulus elasticity (ME) evaluation, analysis aging in 70% ethanol saliva on their hardness sorption. results for DTS ranged from 33.16 MPa (Beautifil F03) 47.74 (Filtek Flow). highest FS...

Bisphenol A-glycidyl methacrylate (bis-GMA) and urethane dimethacrylate (UDMA) are usually combined with low-viscosity monomers to obtain more desirable viscosity, handling characteristics general properties. The present study determined the flexural strength (FS), modulus (FM), diametral tensile (DTS), hardness (HV) of five matrices composites based on these resins. polymerization shrinkage stress (PSS) was also studied for composites. polymer were formed using bis-GMA UDMA. TEGDMA, HEMA...

The contraction stress generated during the photopolymerization of resin dental composites is major disadvantage. water sorption in oral environment should counteract stress. purpose was to evaluate influence composite materials on polymerization shrinkage at restoration-tooth interface. following were tested: Filtek Ultimate, Gradia Direct LoFlo, Heliomolar Flow, Tetric EvoCeram, EvoCeram Bulk Fill, EvoFlow, EvoFlow X-tra Base, Venus BulkFil, and Ceram.X One. measured immediately after...

Abstract Aim of the study was to evaluate influence filler amounts on mechanical properties and contraction stress light-curing experimental composite. Hardness, flexural strength, diametral tensile strength material filled with 40, 50 or 60 wt. % silanized silica were tested. The measured after 24 h by means photoelastic study. addition 40-60 composite caused significant increase in hardness, Young’s modulus strength. DTS , incorporating into polymer matrix, valued at ~26 MPa. containing 40...

The aim of this article was to compare the biomechanical properties commercial composites containing different photoinitiators: Filtek Ultimate (3M ESPE) camphorquinone (CQ); Estelite Σ Quick (Tokuyama Dental) with CQ in RAP Technology®; Tetric EvoCeram Bleach BLXL (Ivoclar Vivadent AG) and Lucirin TPO; Evoceram Powerfill IVB Ivocerin TPO. All samples were cured a polywave Valo Lamp (Ultradent Products Inc.) 1450 mW/cm2. microhardness, hardness by Vicker's method, diametral tensile strength,...

The long-term success of a composite restoration largely depends on its smoothness, which can be achieved by the appropriate polishing tools and material selection. purpose this study was to evaluate surface roughness two materials after application selected systems. Filtek Ultimate (FU) Z250 (FZ) were tested. Forty specimens each prepared. After polymerization under Mylar strip, five samples from group measured. Subsequently, all ground 600 grit sandpaper. per tested again. randomly...

The aim of the study was to compare hardness, coefficient friction, and wear experienced by four different ceramic samples: 3Y-TZP zirconium oxide ceramics—Zi—Ceramill Zi (Amman Girrbach), 5Y-PSZ transparent ceramics—Zol—Ceramill Zolid Sak—feldspathic ceramics—Sakura Interaction (Elephant), Glaze Girrbach). Vickers hardness samples measured. Friction tests ball-on-disc were performed between discs ceramics a zirconia ball, then premolar tooth as counter-sample. mass loss friction...

Ion-releasing polymeric restorative materials seem to be promising solutions, due their possible anticaries effect. However, acid functional groups (monomers) and glass filler increase hydrophilicity and, supposedly, water sorption. The purpose of the study was evaluate influence sorption on stress state at restoration-tooth interface. Beautifil Bulk Fill Flow, Flow Plus F00, F02, Dyract eXtra, Compoglass Ionosit, Glasiosite, TwinkiStar, Ionolux Fuji II LC were used for study. measured using...

Dual-curing composites have a wide spectrum of use in practice (rebuilding, reconstruction, and luting). The characterization this type material comparative study selected mechanical properties with light-cured materials were carried out for paper. In study, we used six dual-cure system—Bulk EZ, Fill-Up!, StarFill 2B, Rebilda DC, MultiCore Flow, Activa Bioactive-Restorative—and three materials—Filtek Bulk Fill Posterior, Charisma Classic, G-aenial Universal Flo. conditioned 24 h water at 37...

There has been no direct comparison of all existing plates dedicated for fracture osteosynthesis mandibular condyle base until now. The aim the study was to test mechanically available designs titanium on market polyurethane mandibles using an individually designed clamping system. Forces required a 1 mm displacement fixed and incidents screw loosening were recorded. Results indicated best mechanical among available. It occured that some osseofixation should not be used any more, whereas...

In the literature no information about plates for high-neck mandibular condylar osteosynthesis could be found despite that 30 plate designs have been published. The main course consider basal or diacapitular fractures. aim of study was to test mechanically all available (only 4 proper) on polyurethane mandibles using an individually designed clamping system.Forces required a 1 mm displacement fixed fracture fragments and incidents screw loosening were recorded.It has occured dedicated...

Background: In the literature, no information on plates for low-neck mandibular condylar osteosynthesis can be found, despite fact that 30 plate designs have already been published. The aim of this study was to compare any dedicated possible use in fracture osteosynthesis. Methods: force required 1-mm displacement fixed fragments and incidents screw loosening were recorded polyurethane mandibles among 16 titanium by 6-mm screws a 2.0 system. Results: Double-straight fixation mechanical gold...

The successful restoration of teeth requires a good connection between the inlay and natural tissue. A strong bond may improve retention reinforce tooth structure. purpose this study was to evaluate influence cement layer thickness on contraction stress generated during photopolymerization, determine changes in state occurring aging water (over 84 days). Two cements were used: resin composite (NX3) self-adhesive (Maxcem Elite Chroma). cylindrical sample made CuZn alloy used imitate inlay....

Pathological tooth wear is an escalating social problem. Occlusal veneers can be alternative to traditional prosthetic restorations such as crowns, inlays, and onlays. Background: The aim of this study assess the fracture resistance occlusal made various materials depending on their thickness. Methods: In total, 120 were examined. four ceramics: leucite LC (IPS Empress Esthetic), hybrid HC (Vita Enamic), lithium disilicate LDC e.max Press), zirconium oxide ZOC (Ceramill Zolid HT). A total 30...

The aim of this study was to evaluate gap formation after using two universal adhesives, Peak Universal Bond (P), which contains chlorhexidine and Adhese (A), 10-MDP monomer, compare them with gold standard adhesives. adhesives were tested in different etching modes, etch-and-rinse (ER) or self-etch (SE), under thermomechanical loading (TML). Two identical Class V cavities prepared each 30 human third molar teeth, resin-composite restorations made. Before TML, replicas the prepared. Gap...

This study aimed to evaluate internal tooth-filling interfaces of composite fillings made using universal adhesives micro-computed tomography (µCT). Sixty class V cavities were randomly assigned into six groups: Peak Universal etch and rinse (PER), self-etch (PSE), Adhese (AER), (ASE). Two further considered gold standards used as control OptiBond FL (OER) for the technique Clearfil SE (CSE). All teeth subjected thermomechanical loading four-year water storage. Next, they analyzed µCT...

(1) Background: Mandibular fractures are common, with the condylar process being a frequent site of injury, accounting for 25–45% cases. This research aims to assess mechanical suitability various plates high-neck condyle fractures. (2) Methods: Polyurethane models mimicking were utilized in this study. Sixteen distinct plate designs, constructed from titanium sheets, tested. The figures underwent force assessments on durability testing apparatus, and relationship between used fracture...

Wprowadzenie. Wiązaniu materiałów kompozytowych towarzyszy skurcz polimeryzacyjny, który wywołuje naprężenia skurczowe w materiale i otaczających go tkankach zęba jest przyczyną powikłań klinicznych. Podczas wykonywania wypełnień ważne ograniczenie naprężeń skurczowych powstających na granicy wypełnienie–tkanki zębów. W celu ograniczenia generowanych przez sieciujący materiał kompozytowy proponuje się wykorzystanie nowo opracowanych o zmodyfikowanym składzie matrycy polimerowej. O wartości...

In the surgical treatment of most common fracture mandible, which is a condylar base, great choice different plate shapes observed. The aim this study was to determine shape gives greatest fixation stiffness. To ensure homogeneity in comparison, tests were performed on polyurethane models divided at level base and each fixed with 51 plates. plates cut from 1 mm thick grade 23 titanium sheet. then loaded force required for displacement recorded. It noted that addition osteosynthesis two...

The surface of zirconia-based dental ceramic restorations require preparation prior to adhesive cementation. purpose this study was assess the influence airborne-particle abrasion with different sizes alumina particles (50 μm, 110 or 250 μm) on mechanical strength ceramics’ frameworks and extent phase transformations. A fracture resistance test performed. central subjected a load [N]. identification quantitative determination crystalline present in zirconia specimens assessed using X-ray...

The composite materials used in conservative dentistry were obtained through polymerization of dimethacrylate resins by light with different power density. effects irradiation method on the shrinkage stresses induced material and selected properties cured product analyzed. was carried out for 60 s irradiating sample from one side continuously, intermittently (after every 20 sec exposure samples conditioned 5 min), using "soft-start" (10s at 200 mW/cm2, 200–1400 remaining time 1400 mW/cm2) or...

ABSTRACTThree types of matrix with constant amount TEGDMA (30 wt.%), and Bis-EMA (10 wt.%) variable values Bis-GMA (10, 5, or 0 UDMA (50, 55, 60 were prepared. Composites filled 45 wt.% silanized silica. Both matrices composites tested for flexural strength (FS), diametral tensile (DTS), hardness (HV) polymerization shrinkage stress. There no significant differences the DTS test. All materials meet FS requirements type 2 dental composites. A decrease in HV was observed non-containing...

(1) Background: The mandible is the most frequently injured component of facial skeleton, with 25–45% mandibular fractures involving condylar process. This study aims to mechanically compare which plates are suitable for use in low-neck condyle. (2) Methods: Polyurethane models simulated were tested using 37 distinct plate designs. These fabricated from 1 mm thick, grade 23 titanium sheets. then subjected force tests on a strength machine, and correlation between applied fracture...