The effect of the addition of surface treated chopped and continuous poly (methyl methacrylate) fibres on some properties of acrylic resin

2008 ◽  
Vol 28 (9) ◽  
pp. 865-872
Author(s):  
D. Jagger ◽  
A. Harrison ◽  
R. Vowles ◽  
R. Jagger
Keyword(s):  
Methyl Methacrylate ◽  
Acrylic Resin ◽  
Poly Methyl Methacrylate

scholarly journals Nanopigmented Acrylic Resin Cured Indistinctively by Water Bath or Microwave Energy for Dentures

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
L. S. Acosta-Torres ◽  
M. C. Arenas ◽  
R. E. Nuñez­-Anita ◽  
F. H. Barceló-Santana ◽  
C. A. Álvarez-Gayosso ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Methyl Methacrylate ◽  
Acrylic Resin ◽  
Microwave Energy ◽  
Water Bath ◽  
Poly Methyl Methacrylate ◽  
Transverse Strength ◽  
Acrylic Resins

The highlight of this study was the synthesis of nanopigmented poly(methyl methacrylate) nanoparticles that were further processed using a water bath and/or microwave energy for dentures. The experimental acrylic resins were physicochemically characterized, and the adherence ofCandida albicansand biocompatibility were assessed. A nanopigmented acrylic resin cured by a water bath or by microwave energy was obtained. The acrylic specimens possess similar properties to commercial acrylic resins, but the transverse strength and porosity were slightly improved. The acrylic resins cured with microwave energy exhibited reducedC. albicansadherence. These results demonstrate an improved noncytotoxic material for the manufacturing of denture bases in dentistry.

scholarly journals The Effect of Fiber Reinforcement on the Dimensional Changes of Poly Methyl Methacrylate Resin after Processing and after Immersion in Water: An in vitro Study

2011 ◽  
Vol 12 (4) ◽  
pp. 305-317 ◽  
Author(s):  
Sathish Abraham ◽  
LM Ranganath ◽  
Ravindra Ganguly Keshav Shet ◽  
AG Rajesh
Keyword(s):  
Methyl Methacrylate ◽  
Fiber Reinforcement ◽  
In Vitro Study ◽  
Acrylic Resin ◽  
High Impact ◽  
Vitro Study ◽  
Poly Methyl Methacrylate ◽  
Dimensional Changes ◽  
Heat Cure

ABSTRACT Aims and objectives To evaluate and compare the effect of fiber reinforcement on the dimensional changes of heat-cured poly (methyl methacrylate) resin after processing and immersion in water. Materials and methods Three different heat-cure resins were selected for the present study: (1) Nonreinforced heat-cure methyl methacrylate resin, (2) High Impact heat-cured methyl methacrylate resin and (3) Fiberglass reinforced methyl methacrylate resin. Ninety samples were prepared using three different resins and denture bases obtained for the same. The amount of space between the tissue surface and the cast in the anterior, middle and posterior regions is measured after processing and immersion in water for 17 days using a traveling microscope having a least count of 0.001 cm. Results Mean and standard deviation were calculated for the dimensional changes and were subjected to statistical analysis (Student t-test, unpaired). Among the three groups of resins, fiber reinforced heat-cured methyl methacrylate resin was found to be statistically highly significant in terms of dimensional changes when compared with the nonreinforced and high impact heat-cured resins. Conclusion Dimensional changes were evident in all the planes in the three groups studied and were in the following decreasing order—fiberglass reinforced heat-cured poly (methyl methacrylate) resin, high impact heat-cured poly (methyl methacrylate) resin and nonreinforced heat-cured poly (methyl methacrylate) resin. Clinical significance The fibers are added in order to increase the strength of acrylic resin. Considering only the strength may in turn affect the dimensional accuracy of the acrylic resin resulting in loss of retention and stability, affecting the fit of the denture. How to cite this article Ranganath LM, Shet RGK, AG Rajesh, Abraham S. The Effect of Fiber Reinforcement on the Dimensional Changes of Poly Methyl Methacrylate Resin after Processing and after Immersion in Water: An in vitro Study. J Contemp Dent Pract 2011;12(4):305-317.

Physical and Mechanical Characterization of Poly(methyl methacrylate) Based Cements for Bone Regeneration

2021 ◽  
Vol 13 (3) ◽  
pp. 427-435
Author(s):  
Abeer Sheikh ◽  
Eraj Humayun Mirza ◽  
Saif ur Rehman Baig ◽  
Fatima Fareedi ◽  
Umar Khan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Methyl Methacrylate ◽  
Chemical Characterization ◽  
Acrylic Resin ◽  
Physicochemical Characteristics ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Bone Cements ◽  
Poly Methyl Methacrylate ◽  
Measurement Surface

This laboratory study set out to characterize Calcium Phosphate (CaP) based bone cements with added Zinc Oxide (ZnO) embedded in Poly (methyl methacrylate) (PMMA). Bone cements with varying percentages of CaP mixed with and without varying percentages of ZnO in PMMA were fabricated by one-step polymerization by reacting equimolar ratios of MMA powder and acrylic resin. Neat-PMMA was used as control throughout the experiment. Fabricated samples were tested for their contact angle measurement, surface roughness, nanohardness, elastic modulus, and also their chemical characterization using Fourier-transform infrared spectroscopy (FTIR) and Raman spectroscopy. A one-way analysis of variance (ANOVA) was used as a statistical method, and a p-value of less than 0.05 was considered statistically significant. It was found that increasing CaP content elevated the hydrophobicity of the composites while mechanical properties increased with the increase of CaP. On the contrary, the addition of ZnO did not show any significant effect. The optimal concentration was observed to be at 20% CaP loading where the mechanical properties were balanced with the hydrophilic nature of CaP. It was also noted that different wt.% of ZnO and CaP did not affect the physicochemical characteristics of the composites. The PMMA-CaP composites demonstrated encouraging results and necessitate further studies to ascertain the implementation of these bone cements clinically.

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