Aims:
The objective of this study was to evaluate the effect of two collagen crosslinking agents on shear bond strength of a nanocomposite using total-etch adhesive to deep dentin.
Materials and Methods:
Thirty maxillary central incisors were selected for the study and each tooth was divided into two equal halves with diamond disc (n = 60). Proximal surfaces were prepared to expose the deep dentin until the remaining dentin thickness was approximately 1 mm. The specimens were divided into three groups based upon the biomodification of dentin with collagen crosslinking agents. In Group I (n = 20), no collagen crosslinking agent was used before bonding system. In Group II, deep dentin biomodification was done with 6.5% proanthocyanidin (PA). In Group III, deep dentin biomodification was done with Riboflavin. Shear bond strength was evaluated using universal testing machine.
Statistical Analysis Used:
One-way analysis (ANNOVA). Pairwise comparison of groups was done with post hoc test.
Results:
Biomodification of deep dentin with PA showed the highest shear bond strength followed by riboflavin and control group.
Conclusion:
Biomodification of dentin surface with collagen cross-linking agents results in improvement of bond strength of total-etch adhesive to deep dentin.
ABSTRACT:Complete or partial denture fabrication encounters a major problem when hard and soft tissue undercuts, mandibular tori, exostosis, titled teeth, interferences and de-arranged occlusion are seen in the oral cavity and thus complicate the treatment plan. Flexible dentures have emerged as a viable option to treat various edentulous conditions where conventional dentures have some limitations of their rigid base. The present article reviews the evolution, applications, advantages, disadvantages, indications and contraindications of flexible dentures.
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