scholarly journals Flexural strength of nano-hybrid resin composite as a function of light attenuation distance and specimen dimension

2016 ◽  
Vol 31 (5) ◽  
pp. 520-529 ◽  
Author(s):  
Farid Sabry El-Askary ◽  
Sara Adel Botros ◽  
Mohamed Salah Abdelaziz Nassif ◽  
Mutlu Özcan
Keyword(s):  
Flexural Strength ◽  
Resin Composite ◽  
Light Attenuation ◽  
Hybrid Resin ◽  
Specimen Dimension

scholarly journals Mechanical properties of bulk-fill versus nanohybrid composites: effect of layer thickness and application protocols

2019 ◽  
Vol 22 (2) ◽  
pp. 234-242
Author(s):  
Aylin Cilingir ◽  
Alev Ozsoy ◽  
Meltem Mert Eren ◽  
Ozge Behram ◽  
Benin Dikmen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Hybrid Composite ◽  
Resin Composite ◽  
Flexural Modulus ◽  
High Viscosity ◽  
Hybrid Resin ◽  
Low Viscosity ◽  
The Mean

Objective: The objective of this study was to evaluate the compressive strength, flexural strength and flexural modulus of high-viscosity, low-viscosity bulk-fill, and conventional nano-hybrid resin composite materials alone and when covered with nano-hybrid resin composite at different incremental thicknesses on the bulk-fill composites. Materials and Methods: Specimens (N=60) were fabricated from the following materials or their combinations (n=10 per group): a) conventional nano-hybrid composite Z550 (FK), b) high-viscosity bulk-fill composite (Tetric N Ceram-TBF), c) low-viscosity bulk-fill composite SDR (SDR), d) Sonicfill (SF), e) SDR (2 mm)+FK (2 mm), f) SDR (4 mm)+FK (4 mm). After 24 h water storage, compressive strength was measured in a universal testing machine (1 mm/min). Additional specimens (N=40) (25x2x2 mm3) were made from FK, TBF, SDR and SF in order to determine the flexural strength and the flexural modulus, (n=10) and subjected to three-point bending test (0.5 mm/min). Data were analyzed using one-way ANOVA and Tamhane’s T2 post-hoc tests (p<0.05). Results: The mean compressive strength (MPa) of the nano-hybrid composite (FK) was significantly higher (223.8±41.3) than those of the other groups (123±27 - 170±24) (p<0.001). SDR (4 mm)+FK (2 mm) showed significantly higher compressive strength than when covered with 4 mm (143±30) or when used alone (146±11) (p<0.05). The mean flexural strength (159±31) and the flexural modulus of FK (34±7) was significantly higher than that of the high- or low-viscosity bulk-fill composites (p<0.001). The mean flexural strength of SF (132±20) was significantly higher compared to TBF (95±25) (p<0.05). Conclusion: Bulk-fill resin composites demonstrated poorer mechanical properties compared to nano-hybrid composite but similar to that of SF. Increasing the thickness of low-viscosity bulk-fill composite (SDR) from 2 to 4 mm underneath the nano-hybrid composite (FK) can improve the mechanical properties of the bulk-fill composites. KeywordsBulk-fill composites; Compressive strength; Flexural modulus; Flexural strength; Mechanical properties.

scholarly journals Study on Properties of Heat-Resistant Hybrid Resin Containing Silicon and Composites

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Lixin Xuan ◽  
Quan Zhou ◽  
Zhiqiang Wang ◽  
Tao Su
Keyword(s):  
Dielectric Properties ◽  
Flexural Strength ◽  
Heat Resistance ◽  
High Performance ◽  
Dissipation Factor ◽  
Cure Reaction ◽  
Hybrid Resin ◽  
Performance Matrix ◽  
Hot Press Process ◽  
Strength Retention

In recent years, one kind of novel hybrid polymer containing silicon has already been reported in the field of high-temperature resistance polymer. Gradually, it has been a research hotspot in the field of high-performance matrix resins because of excellent heat resistance and dielectric properties. The composite was prepared by M-aminophenylacetylene terminated polymethyldiphenylethynyl silane (MDPES-2) as a matrix and nonalkali glass cloth as reinforced material using a hot press process. The cure reaction of MDPES-2 was characterized. Meanwhile, heat resistance, mechanical properties, and dielectric properties of MDPES-2 composites were systematically studied in this paper. The results showed that flexural strength at room temperature is 321 MPa and flexural strength retention at 240°C was 98.3%. Flexural strength retention after thermal treatment at 500°C for 7 min was 84%. In addition, ε and dielectric dissipation factor ( tan δ ) were 3.9 and 2.0 × 10 − 3 (10 GHz).

Influence of Different Restoration Techniques on Fracture Resistance of Root-filled Teeth: In Vitro Investigation

2018 ◽  
Vol 43 (2) ◽  
pp. 162-169 ◽  
Author(s):  
ME Hshad ◽  
EE Dalkılıç ◽  
GC Ozturk ◽  
I Dogruer ◽  
F Koray
Keyword(s):  
Fracture Strength ◽  
Resin Composite ◽  
Testing Machine ◽  
Compressive Force ◽  
Control Group ◽  
Hybrid Resin ◽  
Flowable Composite ◽  
In Vitro Investigation ◽  
Significant Difference

SUMMARY Objective: The purpose of this study was to determine the fracture strength of endodontically treated mandibular premolar teeth restored with composites and different reinforcement techniques. Methods and Materials: Forty-eight freshly extracted human mandibular premolar teeth were randomly divided into four groups: group IN, group CR, group FRC, and group PRF. Group IN consisted of teeth with intact crowns and served as the control group. In the other three groups, endodontic treatment was performed and standard mesio-occluso-distal (MOD) cavities were prepared. Then cavities were restored with hybrid resin composite only, flowable composite and hybrid resin composite, and Ribbond, flowable composite and hybrid resin composite in groups CR, FRC and PRF, respectively. All of the teeth were subjected to fracture by means of a universal testing machine, and compressive force was applied with a modified stainless-steel ball at a crosshead speed at 0.5 mm/min. Results: The highest values were observed in group IN, while the lowest values were determined in group CR. There was not any statistically significant difference between group CR and group FCR (p&gt;0.05). When groups CR, FCR, and PRF were compared, group PRF showed significantly better fracture strength than did groups CR and FCR (p&lt;0.05). It was determined that there was not any significant difference between group IN and group PRF (p&gt;0.05). Conclusions: Polyethylene ribbon fiber considerably increases the fracture strength of mandibular premolar teeth with MOD cavities restored with composite.

Study on fatigue strength and wear resistance of hybrid resin composite with cluster filler

2017 ◽  
Vol 2017.92 (0) ◽  
pp. M823
Author(s):  
Takuya SAKAGUCHI ◽  
Izuru NISHIKAWA ◽  
Takahiro KATO ◽  
Teruo ANRAKU
Keyword(s):  
Wear Resistance ◽  
Fatigue Strength ◽  
Resin Composite ◽  
Hybrid Resin

Clinical Evaluation of Indirect Composite Restorations at Baseline and 36 Months After Placement

2010 ◽  
Vol 35 (2) ◽  
pp. 156-164 ◽  
Author(s):  
W. Dukic ◽  
O. L. Dukic ◽  
S. Milardovic ◽  
B. Delija
Keyword(s):  
Clinical Evaluation ◽  
Clinical Relevance ◽  
Resin Composite ◽  
Good Choice ◽  
Hybrid Resin ◽  
Composite Restorations ◽  
Clinical Difference ◽  
Indirect Composite

Clinical Relevance Indirect resin composite restorations represent a good choice for the therapy of severely damaged teeth. There is no clinical difference between Ormocer and nano-hybrid resin composite after 36 months.

Two-year clinical performance of a nanofiller vs a fine-particle hybrid resin composite

2006 ◽  
Vol 10 (2) ◽  
pp. 119-125 ◽  
Author(s):  
Claus-Peter Ernst ◽  
Mathias Brandenbusch ◽  
Gerrit Meyer ◽  
Kerem Canbek ◽  
Franziska Gottschalk ◽  
...  
Keyword(s):  
Fine Particle ◽  
Clinical Performance ◽  
Resin Composite ◽  
Hybrid Resin

scholarly journals Effect of Low Shrinkage Monomers on Physicochemical Properties of Dental Resin Composites

2015 ◽  
Vol 26 (3) ◽  
pp. 272-276 ◽  
Author(s):  
Dayane Carvalho Ramos Salles de Oliveira ◽  
Karla Rovaris ◽  
Viviane Hass ◽  
Eduardo José Souza-Júnior ◽  
Francisco Haiter-Neto ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Physicochemical Properties ◽  
Statistical Difference ◽  
Resin Composite ◽  
Multiple Comparisons ◽  
Resin Composites ◽  
Dental Resin ◽  
Tukey Test ◽  
Dental Resin Composites ◽  
One Way Anova

The aim of this study was to evaluate the effect of low shrinkage monomers on physicochemical properties of dental resin composites. Two low shrinkage resin composites: one with a crosslink branching monomer (Kalore, GC Corp) and a novel monomer (Venus Diamond, Heraeus Kulzer) were compared to a conventional resin composite formulation (Filtek Z250, 3M/ESPE). The volumetric shrinkage was evaluated by µCT analysis (n=5) and the physicochemical properties by degree of C=C conversion (DC), flexural strength (FS) and Young's modulus (YM) (n=10). All samples were light cured by a LED device (Radii, SDI) with 16 J/cm2. The results were analysed by one-way ANOVA and Tukey test for multiple comparisons (α=0.05). No statistical difference was found between µCT shrinkage values to Kalore (1.8%) and Venus Diamond (1.7%) (p≥0.05); Z250 presented statistical highest shrinkage value (2.0%). Kalore presented higher statistical DC (60.8%) than Venus Diamond (49.5%) and Z250 (49.6%). No statistical difference was found between FS or YM properties to Venus Diamond and Z250; Kalore presented statistical lowest FS and YM properties (p≥0.05). Conclusion: Using novel monomers seem to reduce polymerization shrinkage without affecting the physicochemical properties evaluated of resin composites rather than using crosslink branching monomers.

Fiber Reinforced Epoxy Resin Composite Materials Using Carboxylate-Alumoxanes as Cross-Linking Agents

1999 ◽  
Vol 581 ◽  
Author(s):  
Cullen T. Vogelson ◽  
Yoshihiro Koide ◽  
Andrew R. Barrona
Keyword(s):  
Composite Materials ◽  
Resin Composite ◽  
Diglycidyl Ether ◽  
Alumina Nanoparticles ◽  
Resin Matrix ◽  
Hybrid Resin ◽  
Organic Hybrid ◽  
New Class ◽  
Epoxy Resin Composite ◽  
Ceramic Fillers

ABSTRACTChemically functionalized alumina nanoparticles (carboxylate-alumoxanes) are used as the inorganic component of a new class of inorganic-organic hybrid materials. Lysine- or para- hydroxybenzoic acid-derivatized alumoxanes are readily prepared from the reaction of boehmite, [Al(O)(OH)]n, with the appropriate carboxylic acid. The peripheral organic hydroxides and amines of these carboxylate-alumoxanes either react directly with epoxide resins, such as the diglycidyl ether of bisphenol-A (DER 332), to form a hybrid material, or in the presence of an organic resin and hardener system to form a composite material. SEM and AFM show a uniform distribution of alumina nanoparticles within the resin matrix. The properties and cure times of the alumoxane hybrid and composite materials are distinct from both the pure resins and from a physical blend of the resins with traditional ceramic fillers. A significant increase in thermal stability and tensile strength is observed for both the hybrid and composite resin systems. In addition, both carbon fiber and carbon/Kevlar® matting have been successfully incorporated into the hybrid resin systems resulting in further property improvements.

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