Effect of cellulose nanofiber content on flexural properties of a model, thermoplastic, injection-molded, polymethyl methacrylate denture base material

2020 ◽  
Vol 102 ◽  
pp. 103513 ◽  
Author(s):  
Tomohiro Kawaguchi ◽  
Lippo V.J. Lassila ◽  
Hirono Baba ◽  
Shu Tashiro ◽  
Ippei Hamanaka ◽  
...  
Keyword(s):  
Polymethyl Methacrylate ◽  
Base Material ◽  
Cellulose Nanofiber ◽  
Flexural Properties ◽  
Denture Base ◽  
Injection Molded

scholarly journals Enhancement of the Tensile and the Compression Properties for Heat- Cured Acrylic Resin Denture Base Materials

2018 ◽  
Vol 15 (4) ◽  
pp. 449-454
Author(s):  
Baghdad Science Journal
Keyword(s):  
Polymethyl Methacrylate ◽  
Compression Strength ◽  
Base Material ◽  
Acrylic Resin ◽  
Tensile Tests ◽  
Strength Test ◽  
Denture Base ◽  
Compression Properties ◽  
Base Materials ◽  
Styrene Butadiene

This work aims to investigate the tensile and compression strengths of heat- cured acrylic resin denture base material by adding styrene-butadiene (S- B) to polymethyl methacrylate (PMMA). The most well- known issue in prosthodontic practice is fracture of a denture base. All samples were a blend of (90%, 80%) PMMA and (10%, 20%) S- B powder melted in Oxolane (Tetra hydro furan). These samples were chopped down into specimens of dimensions 100x10x2.5mm to carry out the requirements of tensile tests. The compression strength test specimens were shaped into a cylinder with dimensions of 12.7mm in diameter and 20mm in length. The experimental results show a significant increase in both tensile and compression strengths when compared to control (standard) results for the preparation material.

Thermogravimetric Characterization of the Microstructure Composition of Polyamide Injection Molded Denture Base Material vs Conventional Compression Molded Heat-cured Denture Base Material

2016 ◽  
Vol 17 (2) ◽  
pp. 99-104 ◽  
Author(s):  
Ayman Al-Dharrab ◽  
Lana Shinawi
Keyword(s):  
Weight Loss ◽  
Base Material ◽  
Thermoplastic Resin ◽  
Denture Base ◽  
Excellent Thermal Stability ◽  
Rapid Injection ◽  
Group I ◽  
Injection Molded ◽  
Group Ii

ABSTRACT Background Thermoplastic resin polymers are widely used in medicine due to their biostability and hypoallergenic properties, making them a possible alternative to poly-methylmethacrylate (PMMA). The current research examined the microstructure of a rapid injection molding system thermoplastic resin for construction of flexible denture compared with that of heatcured PMMA. Materials and methods A total of 40 disk-shaped specimens (25 mm in diameter and 3 mm in thickness) were prepared and divided into two groups of 20 disks each (group I samples were of thermoplastic acrylic resin while group II was heat-cured PMMA resin). Results In group I, thermogravimetric analyzer showed that increasing the temperature up to 169°C resulted in about 1.3% of the material loss, and after that the material remains thermally stable up to 200°C. Group II showed 2.24% weight loss at 171°C, and further weight loss (12.025%) was observed on heating to 230°C. Fourier transform infrared (FTIR) spectrophotometer analysis in the range of 400–4000 cm-1 detected the presence of an amine group (N-H) in group I samples and the presence of methylene group attached to inorganic Si as reinforcement filler (Si-CH3). Conclusion Thermoplastic resin displayed excellent thermal stability and the absence of residual monomer within the polymerized material, suggesting its suitability for the fabrication dentures. How to cite this article Al-Dharrab A, Shinawi L. Thermogravimetric Characterization of the Microstructure Composition of Polyamide Injection Molded Denture Base Material vs Conventional Compression Molded Heat-cured Denture Base Material. J Contemp Dent Pract 2016;17(2):99-104.

Effect of Reinforcement on the Flexural Properties of Injection-Molded Thermoplastic Denture Base Resins

2015 ◽  
Vol 26 (4) ◽  
pp. 302-308 ◽  
Author(s):  
Hirono Sasaki ◽  
Ippei Hamanaka ◽  
Yutaka Takahashi ◽  
Tomohiro Kawaguchi
Keyword(s):  
Flexural Properties ◽  
Denture Base ◽  
Injection Molded

Effect of phosphate ester addition on transverse strength and hardness of heat cured acrylic denture base material

2018 ◽  
Vol 30 (2) ◽  
pp. 5-9
Author(s):  
Zahraa S. Abed karkosh ◽  
Basima M.A. Hussien
Keyword(s):  
Polymethyl Methacrylate ◽  
Testing Machine ◽  
Base Material ◽  
Hardness Test ◽  
Acrylic Resin ◽  
Control Group ◽  
Phosphate Ester ◽  
Denture Base ◽  
Hardness Tester ◽  
Transverse Strength

Background: acrylic resin denture base consider a common denture base material for its acceptable cost, aesthetic and easy processing but still has disadvantages including easy of fracture and low impact strength. Material and method: The experimental group was prepared by addition of 15% phosphoric acid 2-hydroxyethyl methacrylate ester (PA2HEME) with polymethyl methacrylate monomer; the experimental groups was compared with the control one. The specimens were prepared according to ADA specification No. 12 with dimension 65 mm x 10 mm x2.5 mm (length x width x thickness respectively). The prepared specimens were tested by three-point flexural strength utilizing Instron Universal Testing Machine (WDW, Layree Technology Co.), Shore D hardness tester used to measure hardness test. Statistical analysis used student T- test, mean and standard deviation. Results: The result of PA2HEME group showed high significant reduction comparing to the control group for both transverse strength and hardness test. Conclusion: Mixing 15% of PA2HEME with 85% methyl methacrylate (MMA) can reduce the mechanical properties of new modified polymethyl methacrylate (PMMA) acrylic resin.

scholarly journals Experimental and Theoretical Approach for Evaluating the Flexural Properties of a Denture Base Material Relined with Three Soft Lining Materials

2008 ◽  
Vol 7 (1) ◽  
pp. 19-26 ◽  
Author(s):  
Yasuhiro Tanimoto ◽  
Hiroyuki Saeki ◽  
Suguru Kimoto ◽  
Kihei Kobayashi ◽  
Norihiro Nishiyama
Keyword(s):  
Theoretical Approach ◽  
Base Material ◽  
Flexural Properties ◽  
Denture Base

scholarly journals Effect of Phosphoric Containing and Varnish-Coated Groups on Candida Albicans Adhesion and Porosity of Heat Cure Acrylic Denture Base Material

2018 ◽  
Vol 11 (1) ◽  
pp. 179-185 ◽  
Author(s):  
Zahraa S. Abed Karkosh ◽  
Basima M. A. Hussein ◽  
Wifaq M. Ali AL-Wattar
Keyword(s):  
Candida Albicans ◽  
Polymethyl Methacrylate ◽  
Base Material ◽  
Acrylic Resin ◽  
Denture Base ◽  
Heat Cure ◽  
Varnish Layer ◽  
Varnish Coating ◽  
Methacrylate Monomer ◽  
Experimental Group

The aim of this study was to evaluate the effect of modified heat cured polymethyl methacrylate denture base (PMMA) or varnish coating of the denture base on candida albicans adhesion and porosity. First experimental group was prepared by addition of 15% phosphoric acid 2-hydroxyethyl methacrylate ester with polymethyl methacrylate monomer. While second experimental group prepared by varnish layer coating after material processing, these groups were compared with the control one. Three groups of vertex acrylic resin used as control, mPMMA and varnish coated group (PPH Cerkamed Wojciech Pawlowski, Poland). The inverted light microscope was used to measure the candida albicans adherence after one week and one month of processing. Two-way ANOVA, LSD test, T- test and Dunnett T3 were performed on data. Modified Acrylic resin showed highly significant reduction in candida albicans adhesion and porosity, also for varnish coating group showed highly significant reduction in candida albicans adhesion and porosity test.

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