Wear resistance of injection-molded thermoplastic denture base resins

Powder injection molding (PIM) process was applied to Fe-based metamorphic alloy powders, and microstructure, hardness, and wear resistance of the PIM products were analyzed and compared with those of conventional PIM stainless steel products. When Fe-based metamorphic powders were injection-molded and then sintered at 1200 oC, completely densified products with almost no pores were obtained. They contained 34 vol.% of (Cr,Fe)2B borides dispersed in the austenitic matrix without amorphous phases. Since these (Cr,Fe)2B borides were very hard and thermally stable, hardness, and wear resistance of the PIM products of Fe-based metamorphic powders were twice as high as those of conventional PIM stainless steel products. Such property improvement suggested new applicability of the PIM products of Fe-based metamorphic powders to structures and parts requiring excellent mechanical properties.

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Comparative adaptation accuracy of different injection molded resin denture base materials: A scanning electron microscope study

Indian Journal of Oral Sciences ◽

10.4103/0976-6944.187445 ◽

2016 ◽

Vol 0 (0) ◽

pp. 0

Author(s):

KhajaYousuf Sharif ◽

AKalyan Chakravarthy ◽

M Mallikarjun ◽

PGautham Reddy ◽

BVeerendra Prasad ◽

...

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Microscope Study ◽

Electron Microscope Study ◽

Denture Base ◽

Scanning Electron Microscope Study ◽

Base Materials ◽

Injection Molded ◽

Scanning Electron

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

Journal of the Mechanical Behavior of Biomedical Materials ◽

10.1016/j.jmbbm.2019.103513 ◽

2020 ◽

Vol 102 ◽

pp. 103513 ◽

Cited By ~ 3

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

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Accuracy and wear resistance of the small injection-molded plastic gears. For high-strength and heat-resistance plastics filled with fiber or carbon.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.56.1000 ◽

1990 ◽

Vol 56 (524) ◽

pp. 1000-1004

Author(s):

Shigetada TANAKA ◽

Satoru EZOE ◽

Yohichi FUJIOKA ◽

Kiyoshi MORIMOTO

Keyword(s):

Wear Resistance ◽

Heat Resistance ◽

High Strength ◽

Injection Molded ◽

Injection Molded Plastic ◽

Plastic Gears

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Shear bond strength of an autopolymerizing repair resin to injection-molded thermoplastic denture base resins

Acta Odontologica Scandinavica ◽

10.3109/00016357.2012.757645 ◽

2013 ◽

Vol 71 (5) ◽

pp. 1250-1254 ◽

Cited By ~ 17

Author(s):

Ippei Hamanaka ◽

Hiroshi Shimizu ◽

Yutaka Takahashi

Keyword(s):

Bond Strength ◽

Shear Bond Strength ◽

Denture Base ◽

Injection Molded

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

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1810 ◽

2016 ◽

Vol 17 (2) ◽

pp. 99-104 ◽

Cited By ~ 2

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.

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