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KMID : 1023820190110010032
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The Journal of Advanced Prosthodontics
2019 Volume.11 No. 1 p.32 ~ p.40
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Physical properties and color stability of injection-molded thermoplastic denture base resins
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Song So-Yeon
Kim Kyoung-Soo
Lee Jeong-Yol
Shin Sang-Wan
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Abstract
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PURPOSE: The purpose of this study was to compare mechanical and physical properties of injection-molded thermoplastic denture base resins.
MATERIALS AND METHODS: In this study, six commercially available products (VA; Valplast, LC; Lucitone, ST; Smiltone, ES; Estheshot-Bright, AC; Acrytone, WE; Weldenz) were selected from four types of thermoplastic denture base materials (Polyamide, Polyester, Acrylic resin and Polypropylene). The flexural properties and shore D hardness have been investigated and water sorption and solubility, and color stability have evaluated.
RESULTS: For the flexural modulus value, ES showed the highest value and WE showed significantly lower value than all other groups (P<.05). Most of experimental groups showed weak color stability beyond the clinically acceptable range.
CONCLUSION: Within the limits of this study, thermoplastic denture base resin did not show sufficient modulus to function as a denture base. In addition, all resins showed discoloration with clinical significance, and especially polyamides showed the lowest color stability.
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KEYWORD
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Thermoplastic denture base resins, Nonmetallic clasp dentures, Denture base polymers, Color stability, Flexural strength
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