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Year : 2017  |  Volume : 7  |  Issue : 2  |  Page : 47-52

Evaluation of interfacial adhesion of two fiber post systems to composite core material following different surface chemical treatments – An In vitro study

Department of Prosthodontics, Government Dental College, Thiruvananthapuram, Kerala, India

Correspondence Address:
Zacharia Mareeza
Department of Prosthodontics, Government Dental College, Thiruvananthapuram, Kerala
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jid.jid_35_17

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Aim: The aim of the study was to evaluate and compare the effect of various surface chemical treatments on the interfacial adhesion of glass and quartz fiber posts to composite core material by assessing the microtensile bond strength. Materials and Methods: A total of 40 glass fiber posts (Group I) and 40 quartz fiber posts (Group II) were selected. Posts in each group were divided into four subgroups based on the surface chemical treatment employed such as A (10% hydrogen peroxide), B (4% hydrofluoric acid), C (37% phosphoric acid), and D (control silanization alone). After prescribed surface treatment protocol for respective subgroups, a core was built around each post using a dual-cure core buildup composite material. Each bonded specimen was sectioned to obtain 'microtensile' specimen which was subjected to tensile load at a crosshead speed of 1 mm/min until failure, in a Universal Testing Machine. The changes in the post surface characteristics after surface treatments were evaluated using scanning electron microscope. Results: Mean bond strength was higher in quartz fiber posts when compared to glass fiber post. Surface treatment with hydrogen peroxide had the greatest impact on post surface in both glass and quartz fiber post groups. Conclusion: Surface chemical treatments of fiber posts significantly increased the interfacial bond strength by enhancing the chemical and micromechanical interaction between the fiber posts and composite core.

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