Characterizations and testing some mechanical properties of prepared PMMA-Lithium disilicate glass ceramic composite for denture base application

Mohammed, Dhuha H; Tukmachi, Mustafa S.; Safi, Ihab Nabeel

doi:10.1016/j.matpr.2020.12.567

Cited by 2 publications

(2 citation statements)

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“…The MPS organosilane was used as coupling agent due to its ability to couple with organic matrix, such as acrylic-based polymers, and to inorganic fillers, like the SiO 2 -Ag hybrid nanoparticles [ 52 ]. The inserted functional groups, especially the methacryloxy group, are expected to improve both the dispersion and interaction of the nanofillers in the acrylic matrix.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, the methacrylate group is present in soft reliner, glaze, and MPS structure and this molecular structure similarity favors the interaction between the components [ 53 ]. In addition, the C=C bond in the MPS methacrylate group can copolymerize with the C=C bond of ethyl methacrylate (soft reliner) and methyl methacrylate (glaze) during the polymerization reactions of the dental materials [ 52 ].…”

Section: Discussionmentioning

confidence: 99%

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Silver-Coated Silica Nanoparticles Modified with MPS: Potential Antimicrobial Biomaterials Applied in Glaze and Soft Reliner

Rossi

Menezes²,

Sampaio³

et al. 2022

Polymers

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Soft reliner and glaze are materials used over full or partial dental prosthesis to prevent excessive pressure on the supporting tissues. They are also indicated as supportive treatment for dental stomatitis, especially when modified by the addition of medications. The objective of the work was to evaluate the antimicrobial effect of silver-coated silica nanoparticles in a glaze and a soft reliner. The nanoparticles were synthesized, characterized, and tested by minimum inhibitory concentration (MIC) for C. albicans SC5314. Then, the nanoparticles were incorporated to a glaze and a soft reliner, which were called nanocomposites. Then, the nanocomposites were divided into six groups (n = 12): CG: glaze/reliner; CR: reliner; G1: glaze + 1% nanoparticles/reliner; G2: glaze + 2.5% nanoparticles/reliner; R1: reliner + 1%; R2: reliner + 2.5%. The nanocomposites were characterized by a goniometer and by a scanning electron microscope. The antibiofilm test was performed against C. albicans SC5314. According to the MIC results, the non-functionalized nanoparticles reduced fungal growth at 1000 μg/mL and the functionalized nanoparticles at 2000 μg/mL. The functionalized nanoparticle had a superior dispersion being selected for the antibiofilm test. There was a reduction of 64% in CFU/specimen count for the glaze, not statistically significant (p = 0.244). For the soft reliner, there was an increase in CFU/specimen with the presence of nanoparticles, still not statistically significant (p = 0.264). In conclusion, it is necessary to conduct new studies to increase the release of silver, thus improving nanoparticles’ antifungal potential.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Silver-Coated Silica Nanoparticles Modified with MPS: Potential Antimicrobial Biomaterials Applied in Glaze and Soft Reliner

Rossi

Menezes²,

Sampaio³

et al. 2022

Polymers

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Nanocomposites obtained by incorporation of silanized silver nanowires to improve mechanical properties and prevent fungal adhesion

Menezes¹,

Sampaio

Silva³

et al. 2021

Nano Select

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In this work, the surfaces of silver nanowires (AgNWs) were modified by silanization process to improve the mechanical and antibiofilm properties of polymethylmethacrylate (PMMA) dental resins. A two-route methodology was used to silanize the AgNWs: first, a surface treatment using tetraethyl orthosilicate (TEOS) was performed to act as interface agent; and then, γmethacryloxypropyltrimethoxysilane (MPS) was used to insert functional groups compatible to the acrylic resin. PMMA/AgNWs composites were obtained using pristine (AgNW P ) and modified AgNWs (AgNW M ) at concentrations of 0.5 and 1.0 wt%. The mechanical (flexural and impact strength) and antibiofilm properties against Candida albicans was investigated. AgNW M showed an enhancement in the dispersion and adhesion within the PMMA matrix, which were responsible for improvements in the mechanical properties. Results of flexural strength showed significant improvements for the sample with incorporation of 0.5 wt% of AgNW M and no significative changes for the sample with AgNW P . In addition, a reduction of about 50% in the biofilm formation by C. albicans was observed for the samples with 0.5 and 1.0 wt% of AgNW M . The incorporation of silanized-AgNWs into PMMA dental resins can combine improvements in antimicrobial activity and in the flexural strength, being a potential antimicrobial biomaterial for dental applications.

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Characterizations and testing some mechanical properties of prepared PMMA-Lithium disilicate glass ceramic composite for denture base application

Cited by 2 publications

References 24 publications

Silver-Coated Silica Nanoparticles Modified with MPS: Potential Antimicrobial Biomaterials Applied in Glaze and Soft Reliner

Silver-Coated Silica Nanoparticles Modified with MPS: Potential Antimicrobial Biomaterials Applied in Glaze and Soft Reliner

Nanocomposites obtained by incorporation of silanized silver nanowires to improve mechanical properties and prevent fungal adhesion

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