Surface Hardness Evaluation of a Thermoplastic Nylon Denture Base Material

Document Type : Original Article

Author

prosthesis, azhar

Abstract

Abstract:
Objective: This study was conducted to evaluate surface hardness of a thermoplastic nylon denture base material and comparing it with conventional heat cured acrylic resin.
Material and methods: Two different types of commercially available denture base materials were used in this study. divided two ggroups Group I: Heat cured acrylic resin denture base material. Group II: Thermoplastic nylon denture base material. each group had ten specimens .Each Specimens had dimensions of (65mm X 10mm X 2.5mm) length, width and thickness according to ADA Specifiication no 12. All species were tested using Digital Display Vicker`s microhardness test with values recorded in HV.
Results: It was found that acrylic resin group recorded statistically non-significant higher Vickers hardness mean value (33.591±1.850 HV) than Thermoplastic nylon group (31.331±2.5 HV) as indicated by unpaired t-test (P=0.0818> 0.05)
Conclusion : Thermoplastic material show to have less than the conventional acrylic resin in terms of surface hardness values.

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