Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/48673
Title: ENHANCING RESIN/DENTIN BOND DURABILITY: THE EFFECT OF CHITOSAN/RIBOFLAVIN MODIFICATION
Authors: UMER DAOOD
Keywords: dentin-collagen, crosslinking, riboflavin, Raman, hybrid layer, failure
Issue Date: 2-Aug-2013
Source: UMER DAOOD (2013-08-02). ENHANCING RESIN/DENTIN BOND DURABILITY: THE EFFECT OF CHITOSAN/RIBOFLAVIN MODIFICATION. ScholarBank@NUS Repository.
Abstract: Objectives: Changes of demineralized dentin collagen and resin/dentin interface with chitosan/riboflavin modification and addition of riboflavin in two-step etch-and-rinse adhesive were investigated. Materials and Methods: Dentin-disc were modified with 0.1% riboflavin or chitosan/riboflavin and photo-activated. An experimental adhesive-system was modified with riboflavin. Dentin surfaces were bonded, restored, and sectioned into beams to store for 24hr or 9-months in artificial saliva. Bond testing, scanning electron microscopy and degree of conversion were evaluated. AdperTM Single-Bond adhesive-system was modified with riboflavin; Confocal and Raman spectroscopy were performed. Results: Open-intact collagen with chemical changes, uniform hybrid-layer and higher resin infiltration were found with 0.1%RF and Ch/RF 1:4 modifications. Modification of adhesive with 1% and 3% riboflavin increased the bond strength. Higher resin-infiltration with 1% and 3% riboflavin modified commercial adhesives was found. Conclusions: Collagen network can be stabilized using chitosan/riboflavin modifications with uniform hybrid layer and increased bond strengths using riboflavin in experimental adhesive.
URI: http://scholarbank.nus.edu.sg/handle/10635/48673
Appears in Collections:Master's Theses (Open)

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