Related Experiment Video
Updated: May 4, 2026
06:02
2-Methacryloyloxyethyl Phosphorylcholine Polymer Treatment of Complete Dentures to Inhibit Denture Plaque Deposition
Published on: December 26, 2016
10.3K
Maximizing dental composite performance: Strength and hardness enhanced by innovative polymer-coated MgO
Ghada H Naguib1, Dalia Abuelenain2, Jumana Mazhar3
1Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Oral Biology, Cairo University School of Dentistry, Cairo, Egypt.
Journal of Dentistry
|July 28, 2024
Summary
Zein-incorporated magnesium oxide nanoparticles (zMgO NPs) enhance dental resin composites. Low concentrations (0.3-0.5%) significantly improved compressive strength, flexural strength, and hardness, benefiting dental restoration durability.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials Science
Background:
- Zein-incorporated magnesium oxide nanoparticles (zMgO NPs) show potential for modifying dental material properties.
- The impact of zMgO NPs on the mechanical characteristics of resin composites remains largely unexplored.
- Investigating these effects is crucial for advancing dental restorative materials.
Purpose of the Study:
- To evaluate the influence of varying zMgO NP concentrations on the mechanical properties of conventional, flowable, and bulk-fill resin composites.
- To determine the optimal concentration of zMgO NPs for enhancing compressive strength, flexural strength, and microhardness.
- To assess the potential of zMgO NPs as a reinforcing agent in dental composites.
Main Methods:
- Four hundred fifty resin composite samples (conventional, flowable, bulk-fill) were prepared with 0%, 0.3%, 0.5%, 1%, or 2% zMgO NPs.
- Mechanical property testing included compressive strength, flexural strength, and microhardness analysis.
- Specimen characterization utilized X-ray diffraction, FTIR, SEM, EDS, and TEM for structural and compositional analysis.
Main Results:
- zMgO NPs were uniformly distributed within the composite matrix, forming a stable hybrid material.
- Composites with 0.3% and 0.5% zMgO NPs exhibited significant increases in compressive strength, flexural strength, and hardness compared to controls.
- Bulk-fill composites with zMgO NPs showed a significant increase in hardness across all tested concentrations.
Conclusions:
- Incorporating zMgO NPs, particularly at low concentrations (0.3-0.5%), can enhance the mechanical properties of various dental resin composites.
- The modified composites demonstrated improved or maintained mechanical integrity, suggesting their suitability for dental applications.
- zMgO NPs represent a promising additive for developing more durable and resilient dental restorative materials.
Related Concept Videos
01:17Mortar Properties
685
Mortar properties encompass a range of characteristics crucial for construction and masonry work, including workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Workability refers to mortar's ability to be easily applied and manipulated without sagging or falling off surfaces, which is important for efficient masonry unit placement and alignment. Water retention is essential to prevent the mortar from losing moisture too quickly to...
685
01:12Bonding and Strength of Aggregate
1.2K
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
1.2K
01:30Superplasticizers
468
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
468
01:29Additives and Fillers in Concrete
493
Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
The...
The...
493