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ORIGINAL ARTICLE
Year : 2008  |  Volume : 8  |  Issue : 2  |  Page : 87-93

In vitro evaluation of transverse strength of repaired heat cured denture base resins with and without surface chemical treatment


1 Department of Prosthodontics, MNR Dental College & Hospital, Sangareddy, Andhra Pradesh, India
2 Department of Prosthodontics, Government Dental College, Goa, India

Correspondence Address:
Shreya Siddesh Colvenkar
A-135, KMR Luxor Park, PJR Enclave, Chandanagar, Hyderabad
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-4052.43592

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Purpose of Study: Denture repair involves joining two parts of fractured denture with a denture repair material. The success of denture repair relies on the phenomenon of adhesion. Polymer surface can be etched by appropriate chemical, which changes the morphology and chemical properties of surface and promotes better adhesion. Taking into account the importance of adhesion in denture repair, the study was designed to evaluate and compare the transverse strength of repaired conventional, high-impact and glass fiber-reinforced heat cure denture base resins with and without surface chemical treatment with ethyl acetate and methylene chloride. Methodology: The study was conducted by surface treatment of different denture base resins (conventional, high impact, and glass fiber) with different chemicals (ethyl acetate and methylene chloride), with control group formed without surface chemical treatment. Specimens were repaired with autopolymerizing acrylic resin using 'sprinkle on' technique. The testing of the transverse strength of the repaired specimen was carried out on universal testing machine. Principal Conclusion: The study revealed that surface chemical treatment with methylene chloride and ethyl acetate improved the transverse strength of repaired heat cure denture base when compared with control group. The glass fiber subgroup with methylene chloride surface treatment is recommended as the combination possessing the most superior transverse strength among the various combinations.


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