The effect of aluminum oxide addition on the flexural strength of heat activated acrylic resin: An in vitro study

Anne, Gopinadh; Oliganti, Swetha Hima Bindu; Atla, Jyothi; Budati, Sreedevi; Manne, Prakash; Chiramana, Sandeep

doi:10.4103/2277-8632.153307

Cited by 4 publications

(3 citation statements)

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“…Aluminum oxide (Al2O3) has been used to reinforce PMMA, [13] with Ellakwa et al [14] reporting that thermal conductivity and flexural strength increased with Al2O3 additions, leading to increased patient satisfaction [14]. Similarly, in our study, thermal conductivity was increased with the addition of Al2O3, but there was no difference in flexural strength.…”

Section: Resultssupporting

confidence: 73%

“…Because it contains a high covalent bond, it is more durable than oxide ceramics, with good thermal properties, good biocompatibility and excellent cytocompatibility, making it suitable for use in medical implants and prostheses [12]. Alumina has been used for reinforcing acrylic resins [13] and is the strongest and most rigid of the oxide ceramics [14]. It has wide application because of its exceptional hardness, excellent dielectric properties, good heat resistance and thermal properties [14].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Thermal Conductivity and Flexural Strength of Polymethylmethacrylate Denture Base Material with SiC and Al2O3 Added

Yeşildal¹,

Kul²,

Yeşildal³

et al. 2021

Mater. Plast.

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Although polymethylmethacrylate (PMMA) is widely used as a denture base material, its disadvantages include low strength and low thermal conductivity. The effects on thermal conductivity, flexural strength, thermal diffusivity, and elastic modulus of adding Al2O3 and SiC powders in different volumes to PMMA were investigated. A total of 60 specimens were prepared in 10 groups (five groups for the thermal conductivity test and five groups for the flexural strength test (n:6). The specimens were immersed in water for 30 days before the testing. Thermal conductivity values were measured by the transient hot bridge (THB) method, and flexural strengths were measured by the 3-point bend test. A significant difference was found in thermal conductivity, flexural strength, thermal diffusivity and elastic modulus values between independent groups (P [0.001) using the Kruskal-Wallis test. The Kruskal Wallis 1-way ANOVA was used for the post hoc tests after Kruskal Wallis (a;=.05). The thermal conductivity of PMMA increased significantly with the addition of 15% SiC and 15% Al2O3. The flexural strength values decreased significantly with the addition of 10% SiC and 15% Al2O3. The thermal diffusivity values increased significantly with the addition of 10% and 15% SiC. The Young modulus of PMMA decreased when 10% SiC, 10% Al2O3 and 15% Al2O3 were added. Environmental scanning electron microscope (ESEM) showed that ceramic powders were dissipated in PMMA. The addition of 15% SiC powders to PMMA increased thermal conductivity without significantly reducing flexural strength. This study helped determine the optimum volumes for the use of SiC and Al2O3 powders. Knowledge of the importance of this variable will help in more effective modification of denture base resin with SiC and Al2O3 powders to improve heat transfer without adversely affecting strength.

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Section: Resultssupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Investigation of the Thermal Conductivity and Flexural Strength of Polymethylmethacrylate Denture Base Material with SiC and Al2O3 Added

Yeşildal¹,

Kul²,

Yeşildal³

et al. 2021

Mater. Plast.

View full text Add to dashboard Cite

show abstract

“…For example, polymethyl methacrylate (PMMA) is one of the most common commercial materials used for the manufacture of denture bases. However, there are some technical challenges that hinder the application of PMMA, such as large shrinkage, low degree of one-time curing, poor mechanical strength, low bacterial resistance, etc., limiting their clinical applications [2,3,4]. This study aims to increase the mechanical properties of PMMA resin as well as to enhance its antibacterial activity by incorporation of the nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

A Study of 3D-Printable Reinforced Composite Resin: PMMA Modified with Silver Nanoparticles Loaded Cellulose Nanocrystal

et al. 2018

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With the rapid application of light-curing 3D printing technology, the demand for high-performance polymer resins is increasing. Existing light-curable resins often have drawbacks limiting their clinical applications. This study aims to develop a new type of polymethyl methacrylate (PMMA) composite resins with enhanced mechanical properties, high antibacterial activities and excellent biocompatibilities. A series of reinforced composite resins were prepared by mechanically mixing PMMA with modified cellulose nanocrystals (CNCs), which were coated with polydopamine and decorated by silver nanoparticles (AgNPs) via Tollen reaction. The morphology of CNCs-Ag was observed by transmission electron microscopy and the formation of AgNPs on CNCs was confirmed by X-Ray photoelectron spectroscopy analyses. Functional groups in PMMA-CNCs-Ag composites were verified by Fourier Transform infrared spectroscopy (FTIR) spectroscopy. The mechanical assessment and scanning electron microscopy analysis suggested that the evenly distributed CNCs-AgNPs composite effectively improve mechanical properties of PMMA resin. Cytotoxicity assay and antibacterial activity tests indicated excellent biocompatibility and high antibacterial activities. Furthermore, PMMA with CNCs-AgNPs of 0.1 wt.% (PMMA-CNCs-AgNPs-0.1) possessed the most desirable mechanical properties owing to the homogeneous distribution of AgNPs throughout the resin matrix. This specific composite resin can be used as a functional dental restoration material with potential of other medical applications.

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Evaluation of biofilm formation on acrylic resin surfaces coated with silicon dioxide: an in situ study

et al. 2022

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Biofilm on acrylic resin dental prostheses may cause gingival inflammation. This study evaluated the influence of a silicon dioxide coating layer applied onto acrylic resin on the adhesion of microorganisms. Blocks (5 x 5 x 3 mm) of acrylic resin were evaluated for surface roughness and divided into two groups: control (CG) and coated with silicon dioxide (LG group). The specimens were evaluated by scanning electron microscopy (n = 1) and by contact angle analysis (n = 3). For the in situ study, 20 volunteers wore acrylic palatal devices containing three samples from each group (n = 60) for 2 days. The biofilm formed was quantified by metabolic activity and total biomass using the crystal violet assay. The results were subjected to Bartlett's normality test and Gamma model with random effect for the response variable (α = 5%). The mean contact angle of the coated group was significantly lower than that of the uncoated group (p < 0.05). The metabolic activity of microorganisms in the biofilm on the blocks treated with coating was significantly lower than that of control blocks (p = 0.02). Regarding the amount of extracellular matrix produced by the microorganisms, there was no difference between the CG and LG group (p = 0.05). The application of a silicon dioxide coating on acrylic resin reduced the activity of the polymicrobial biofilm formed in situ. This coating may be advantageous for patients with conventional complete dentures or implants made of acrylic resin and who have motor difficulties that prevent them from cleaning their prostheses properly.

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The effect of aluminum oxide addition on the flexural strength of heat activated acrylic resin: An in vitro study

Cited by 4 publications

References 0 publications

Investigation of the Thermal Conductivity and Flexural Strength of Polymethylmethacrylate Denture Base Material with SiC and Al2O3 Added

Investigation of the Thermal Conductivity and Flexural Strength of Polymethylmethacrylate Denture Base Material with SiC and Al2O3 Added

A Study of 3D-Printable Reinforced Composite Resin: PMMA Modified with Silver Nanoparticles Loaded Cellulose Nanocrystal

Evaluation of biofilm formation on acrylic resin surfaces coated with silicon dioxide: an in situ study

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