Journal of Conservative Dentistry
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ORIGINAL ARTICLE
Year : 2011  |  Volume : 14  |  Issue : 1  |  Page : 28-31

Evaluation of post-surface conditioning to improve interfacial adhesion in post-core restorations


1 Department of Conservative Dentistry & Endodontics, Meenakshi Ammal Dental College, MAHER University, Chennai, India
2 Department of Conservative Dentistry & Endodontics, SRM Dental College, SRM University, Chennai, India

Correspondence Address:
Mylswamy Sumitha
Department of Conservative Dentistry & Endodontics, Meenakshi Ammal Dental College, MAHER University, Chennai
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-0707.80728

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Aim : To examine the influence of different post-surface treatments on the interfacial strength between epoxy resin-based fiber posts and methacrylate-based resin composites that are employed as core build-up materials. Materials and Methods : Forty clear posts were divided into four groups of 10 each. The different surface treatments used were etching with alkaline potassium permanganate, 10% hydrogen peroxide, 37% phosphoric acid, and silanization alone. After etching and thorough rinsing, a single layer of silane was applied to the post surface. Then the post was placed in a rectangular plastic matrix and core bulid-up was done using Multi Core, a dual cured composite resin. A slab of uniform thickness, with the post in the center and the core build-up composite on either side was created. The specimens were cut so as to obtain microtensile sticks that were loaded in tension at a cross-head speed of 1 mm/min until failure. The statistical analysis was performed using two-way ANOVA and the paired T test for post-hoc comparisons. Results : The results achieved with potassium permanganate had a significant influence on microtensile interfacial bond strength values with the tested material. Conclusion : Surface chemical treatments of the resin phase of fiber posts enhance the silanization efficiency of the quartz fiber phase, so that the adhesion in the post/core unit may be considered as a net sum of chemical and micromechanical retention.


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