How can surface hardness of denture bases be enhanced by fillers?
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The surface hardness of denture bases can be enhanced by incorporating fillers. Studies have shown that the addition of fillers, such as glass fibers, micron or nano-sized metal/metal oxide particles, and ceramic fillers, can improve the mechanical properties of denture base resin, including surface hardness . The fillers should be well-dispersed and chemically bonded to the denture base resin to achieve the desired effect . The use of fiber mesh reinforcement has also been found to increase the fracture resistance of denture bases without significantly affecting surface hardness . By incorporating fillers into the denture base resin, the material becomes stiffer and more resistant to deformation, resulting in enhanced surface hardness .
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59 Citations | The addition of fillers such as nitrile rubber and ceramic particles can enhance the impact and fracture resistance of denture bases, but it does not significantly improve surface hardness. |
10 Citations | The surface hardness of denture bases can be enhanced by incorporating fillers with specific surface characteristics, quantity, and level of dispersion. |
| The surface hardness of denture bases can be enhanced by incorporating fillers such as nano-fillers into the poly methyl methacrylate (PMMA) material. | |
13 Citations | The surface hardness of denture bases can be enhanced by using fillers with a higher elastic modulus, but this may compromise other mechanical properties. |
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What is the effect of PN filler?4 answersThe effect of PN filler varies depending on the specific system and conditions. In the case of PEO/PAN + NaPF6 films, the addition of nano-sized TiO2 filler reduces ion pair formation in the polymeric separator, resulting in improved electrical conductivity and thermal stability. In interpenetrating polymer networks (IPNs), the introduction of filler affects the crosslinking reaction and microphase segregation of homopolymers, leading to changes in phase segregation and internal stress appearance. In PBAT/organoclay nanocomposites, the incorporation of organoclays improves the performance of PBAT by increasing stiffness, slightly improving thermal stability, and not affecting the glass transition temperature. In binary frontal polymerization systems, the choice of filler can affect front temperature and velocity, but front temperature is rarely affected by filler choice.
What is the main function of a denture base?5 answersThe main function of a denture base is to provide support, stability, and retention for the artificial teeth in a dental prosthesis. It plays a crucial role in improving the physical properties of the prosthesis, such as fracture resistance, dimensional stability, accuracy, and weight reduction. Additionally, the denture base helps prevent resorption of residual ridges in the mouth. It also allows for the bonding of artificial teeth within tooth socket compartments, ensuring a consistent and predictable bond between the teeth and the base. The denture base can also be customized to carry information about the wearer, such as engraved marks that provide identification or other relevant details. Overall, the denture base is essential for the successful rehabilitation of complete edentulous patients and the fabrication of dentures that closely resemble the natural condition.
Surface rouhness of denture base reinforced with nanofillers?5 answersThe addition of nanofillers to denture base materials has been shown to affect the surface roughness. In some studies, the addition of nanofillers resulted in a significant increase in surface roughness compared to the control group. However, it was found that the increase in surface roughness was only significant when the concentration of nanofillers exceeded 0.5%. On the other hand, other studies have reported that the addition of nanofillers did not significantly affect the surface roughness. Overall, it can be concluded that the effect of nanofillers on surface roughness of denture base materials is dependent on the type and concentration of the nanofillers used.
Surface hardness of denture base reinforced with nanofillers?5 answersThe addition of nanofillers to denture base resin has been shown to improve surface hardness. Different types of nanofillers, such as ZrO2 nanoparticles, TiO2 nanoparticles, E-glass fiber, silicon dioxide nanoparticles, diamond nanoparticles, SnO2 nanoparticles, and natural egg shell powder, have been investigated for their reinforcing effects. The optimal concentration of nanofillers for enhancing surface hardness varies depending on the specific filler used. For example, a concentration of 0.5% has been suggested as the most appropriate ratio for improving hardness with acceptable surface roughness. Other studies have reported an increase in surface hardness with higher percentages of nanofillers. It is important to note that the addition of nanofillers may also affect other mechanical properties of the denture base resin, such as flexural strength and surface roughness.
How can impact strength of denture bases be enhanced by fillers?3 answersThe impact strength of denture bases can be enhanced by the addition of fillers. One study found that the addition of 0.05 wt.% Ag-doped carbon nanotubes (CNT) to PMMA-based denture base material significantly increased the impact strength compared to the control group. Another study showed that the flexural strength of denture base polymer was strengthened by adding fibre reinforcement, with impregnated or re-impregnated fibres providing greater reinforcement. A systematic review found that well-dispersed lower filler loading PMMA denture base resin can enhance the fracture strength and other related mechanical properties. Additionally, the incorporation of a composite of halloysite nanotubes (HNTs) and multi-walled carbon nanotubes (MWCNTs) into the PMMA denture base improved the flexural strength and surface roughness properties. Therefore, the use of fillers such as Ag-doped CNTs, fibre reinforcement, and nanotube composites can enhance the impact strength of denture bases.
Enhancement of PMMA acrylic denture base?3 answersPoly methyl methacrylate (PMMA) denture base material can be enhanced by adding various additives such as fibers, fillers, and nanofillers. These enhancements have been shown to improve the mechanical properties of PMMA, including flexural strength, impact strength, compression strength, and tensile strength. Fiber reinforcement, both impregnated and re-impregnated, has been found to strengthen the denture base polymer. The addition of fillers, fibers, and nanofillers has been shown to improve the properties of PMMA, but most studies have been limited to in vitro investigations without clinical implications. Silanized nanoparticle addition and a hybrid reinforcement system have been suggested as modifications to improve the properties of PMMA. Overall, while there is no ideal denture base material, PMMA can be enhanced through various modifications to improve its properties for denture applications.