Poly(methylmethacrylate) Microwave Processing: A Technique Paper

Selecman, Audrey; Brodine, Brian A.

doi:10.1111/jopr.13130

Cited by 6 publications

(2 citation statements)

References 8 publications

(8 reference statements)

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“…Strategies for toughening denture bases min. Microwave energy was used for practical reasons in this study, and has demonstrated similar results to conventional denture processing (21,22). Resulting bar samples were deflasked after flask cooling at room temperature, and finished with acrylic resin finishing and polishing stones and sandpapers with decreasing abrasiveness.…”

Section: Sample Preparationmentioning

confidence: 99%

Strategies for Potential Toughening of Acrylic Denture Bases Polymerized With Microwave Energy

Paula

Fugolin²,

Pfeifer³

2020

Braz. Dent. J.

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Thiourethane additives have been shown to improve properties in several dental polymer applications. The aim of this study was to verify the effect of the addition of thiourethane oligomers and acrylamide or isobornyl-based plasticizers on the physical properties of the denture base acrylic resin polymerized with microwaves. Thiourethane oligomer (TU) was synthetized and added to microwaved acrylic resin in proportions varying between 3 and 14 wt%. Separate experimental groups included the addition of dimethyl acrylamide (DMAM) and isobornyl methacrylate as plasticizers, at concentrations varying from 5 to 20 wt%. Samples were polymerized using microwave energy at 500 Watts for 3 min, deflasked at room temperature, stored in water at 37 °C for 24 h, and evaluated for: linear dimensional change, gloss, Knoop hardness, surface roughness, impact strength, yield strength, elastic modulus, toughness, yield strength, viscosity, glass transition temperature and network heterogeneity, and water sorption/solubility. Data were analyzed with ANOVA/Tukey’s post-hoc test (a=5%). The addition of TU led to properties that were similar or worse than the materials to which it was not added, except for dimensional stability. The impact on properties was statistically significant for all materials above 20% addition of TU. The addition of DMAM at 5 wt% or isobornyl methacrylate at 10 wt% improved yield strength and modulus, but increased water sorption and solubility. Except for dimensional stability, the addition of thiourethane oligomers to acrylic denture base materials compromised most tested properties. The use of DMAM and isobornyl methacrylate improved properties for selected compositions.

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Section: Sample Preparationmentioning

confidence: 99%

Strategies for Potential Toughening of Acrylic Denture Bases Polymerized With Microwave Energy

Paula

Fugolin²,

Pfeifer³

2020

Braz. Dent. J.

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“…Edentulism is a matter of public health and research developed in order to improve techniques and materials, seeking the quality of total dentures are of great relevance and scientific appeal [1,2]. Several authors attribute to the materials used in the manufacture of prostheses the causes of problems [3] such as, lack of adaptation, increased vertical dimension occlusion, porosity and lack of resistance.…”

Section: Introductionmentioning

confidence: 99%

Linear dimensional change of edentulous models made of high-density laboratory silicones at different storage times

DAMASCENO

Castro

SILVA

et al. 2023

RGO, Rev. Gaúch. Odontol.

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Objective: To evaluate the dimensional change of edentulous models made of high density laboratory silicones at different storagetimes. Methods: A metallic master model simulating an edentulous maxilla was used. The model had projections of 1.8 cm located in the regions of canines (A and B) and molars (C and D) allowing the linear measurement of distances AB, BC, CD, DA, AC and BD. A laboratory silicone mold was made for duplication of master model in the following materials (n = 10): G1: Zetalabor 85, G2: Titanium 95, G3: Platinum 95 and G4: Gypsum type III (control). The samples were photographed and measured using a software (Image J) at times T1 (baseline) and T2 (after one week of models fabrication). The data were statistically analyzed using Kruskal- Wallis and Dun non-parametric tests (α = 0.05). Results: The storage time influenced the behavior of the materials evaluated. All groups presented dimensional changes in both times and the group Tit95 presented the best results. Only Zet85 group showed a different behavior related to the region of the model. Conclusions: The high density laboratory silicones showed satisfactory results when compared to the gypsum group. Tit95 was the most stable material and it can be recommended as an edentulous model for total protheses.

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Applications of poly(methyl methacrylate) polymer in dentistry: A review

Kaur

Thakur

2022

Materials Today: Proceedings

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Poly(methylmethacrylate) Microwave Processing: A Technique Paper

Cited by 6 publications

References 8 publications

Strategies for Potential Toughening of Acrylic Denture Bases Polymerized With Microwave Energy

Strategies for Potential Toughening of Acrylic Denture Bases Polymerized With Microwave Energy

Linear dimensional change of edentulous models made of high-density laboratory silicones at different storage times

Applications of poly(methyl methacrylate) polymer in dentistry: A review

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