Evaluation of the flexural mechanical properties of various thermoplastic denture base polymers
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- LEE Hae-Hyoung
- Department of Biomaterials Science, College of Dentistry, Dankook University Institute of Tissue Regeneration Engineering, Dankook University
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- LEE Jung-Hwan
- Institute of Tissue Regeneration Engineering, Dankook University
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- YANG Tae-Hyun
- Department of Biomaterials Science, College of Dentistry, Dankook University
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- KIM Yu-Jin
- Department of Biomaterials Science, College of Dentistry, Dankook University
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- KIM Si-Chul
- Department of Dental Technology, Chungbuk Health & Science University
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- KIM Gyu-Ri
- Department of Dental Laboratory, Gimcheon University
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- KIM Hyung-Rae
- Department of Biomaterials Science, College of Dentistry, Dankook University
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- LEE Chung-Jae
- Department of Dental Technology, Shinhan University
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- OKUBO Chikahiro
- Department of Removable Prosthodontics, School of Dental Medicine, Tsurumi University
抄録
<p>This study evaluated the flexural mechanical properties of various thermoplastic denture base polymers (six polyamides, four acrylic resins, polyester, polypropylene, and polycarbonate) by three different testing conditions; specimens were tested in water bath at 37°C (Wet/Water, by ISO 20795-1), or in ambient air (Wet/Air) after being immersed in distilled water for 50 h, or after desiccation for 7 days (Dry/Air). The mean ultimate flexural strength (UFS) and flexural modulus (FM) for most products ranged from 27 to 61 MPa and from 611 to 1,783 MPa respectively, which failed to meet the minimum requirements of the international standard, except for polycarbonate (89 and 2,245 MPa). The mean UFS and FM values were ranked Dry/Air>Wet/Air>Wet/Water (p<0.05). In conclusion, the flexural mechanical properties of denture base polymers varied with the products and were significantly affected by the testing medium (air or water) and specimen conditions (wet or dry).</p>
収録刊行物
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- Dental Materials Journal
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Dental Materials Journal 37 (6), 950-956, 2018-11-27
日本歯科理工学会