Shear Bond Strength of Acrylic Denture Teeth to PMMA and Polyamide Denture Base Materials

Journal of Dental Materials and Techniques

hossein dashti¹  Mohammadreza Nakhaei²  reza Barazandeh³  nafiseh teimouri⁴ 

[1] Assistant Professor, Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran;AssociateProfessor, Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.;DDS, Mashhad, Iran;Postgraduate student , Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.;

关键词: bond strength;    Polyamide;    flexible dentures;    denture base materials;   

DOI  :  10.22038/jdmt.2017.10003

来源: DOAJ

【 摘 要 】

Introduction: Detachment of denture teeth from denture base is one of the most common reasons for costly denture repairs .This study aimed at evaluating the bond strength of an acrylic denture tooth to polyamide injection-molded thermoplastic denture base material compared with three conventional polymethylmethacrylate (PMMA) denture base resins. Materials and Method: A total of 40 acrylic denture molar teeth were randomly allocated into four groups (n=10) of heat-polymerized (HP), Auto-polymerized (AP), Injection molded (IM) and Polyamide thermoplastic (PT). All denture base/acrylic teeth combinations underwent 5000 thermal cycles (5-55◦C).Samples were subjected to shear bond strength test by a universal testing machine with a 1 mm/min crosshead speed .Data were analyzed using ANOVA and Tukey’s tests(α=0.05). Results: Mean ±SD of shear bond strength values were (MPa) 4.82±1.21, 4.52±1.67, 3.7±0.84 and 4.13±2.21 for groups HP, AP, IM and PT respectively. No significant difference was found among the experimental groups (P=0.429). Conclusion: Polyamide thermoplastic denture base resin was similar to conventional PMMA denture base materials in terms of bond strength to artificial denture teeth.

【 授权许可】

Unknown