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ORIGINAL ARTICLE
Year : 2018  |  Volume : 8  |  Issue : 1  |  Page : 25-32

Evaluation of shear bond strength of acrylic resin teeth to heat-polymerized denture base resin before and after thermocycling: An in vitro study


1 Department of Prosthodontics, VSPM Dental College and Research Centre, Nagpur, Maharashtra, India
2 Private Practitioner, Mumbai, Maharashtra, India

Correspondence Address:
Dr. Neelam Pande
C/O Dr. Abhay S. Pande, 123, “Rujuta” Apartments, Flat No. 1, Pande-Lay-Out, Khamla, Nagpur - 440 025, Maharashtra
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijmd.ijmd_6_18

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Introduction: One of the most common denture repairs is the replacement of detached acrylic resin teeth. Given one of the advantages of acrylic teeth is the ability to chemically bond to denture base resins. The ability of acrylic teeth to bond to denture base resins may also be affected by the type of denture teeth. Studies have addressed the degradation at the acrylic teeth/denture base resin interface as a result of thermal stress. Hence, the aim of this study was to determine the shear bond strength of commercially available heat-polymerized acrylic resins to denture base resins to acrylic resin teeth before and after thermocycling. Materials and Methods: Two heat-polymerized denture base resins (Meliodent and DPI) were selected and bonded to acrylic resin molar teeth. A total of 60 samples were prepared and divided into two main groups: 30 for Meliodent and 30 for DPI. These were again divided into two subgroups: with and without thermocycling. For half the number of samples of each brand, thermocycling was carried out and shear bond testing was done, using Instron universal testing machine. The findings were statistically analyzed and the shear bond strength was calculated in Map. Results and Conclusion: After comparing the results, it was found that the shear bond strength was not significantly affected before and after thermocycling for these two heat-polymerized denture base resins. Among two, Meliodent was found better denture base material for bonding to acrylic resin molar tooth than DPI, before and after thermocycling.


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