Abstract
Contemporary dentistry literally cannot be performed without use of resin-based restorative materials. With the success of bonding resin materials to tooth structures, an even wider scope of clinical applications has arisen for these lines of products. Understanding of the basic events occurring in any dental polymerization mechanism, regardless of the mode of activating the process, will allow clinicians to both better appreciate the tremendous improvements that have been made over the years, and will also provide valuable information on differences among strategies manufacturers use to optimize product performance, as well as factors under the control of the clinician, whereby they can influence the long-term outcome of their restorative procedures.
Highlights
Chemically cured productsUse of resin-based products as restorative materials is not new. The first products utilized for these purposes were based on plant or animal components, and were molded to shape using heat (thermoplastic).[2]
Contemporary dentistry literally cannot be performed without use of resin-based restorative materials
In order to understand dental photocuring, one must be able to correlate electromagnetic energy contained in light photons with the ability to activate free radicals, via interaction with photoinitiator molecules
Summary
Use of resin-based products as restorative materials is not new. The first products utilized for these purposes were based on plant or animal components, and were molded to shape using heat (thermoplastic).[2]. Forms of a direct, esthetic restorative material (Sevitron, LD Caulk Company, Milford, DE, USA) used a powder/liquid system.[4] Initial results were good, the restoration discolored, wore at a very high rate, and displayed unacceptable leakage at the margins It was not until advancements in monomer chemistry (Bis-GMA, “Bowen’s monomer”) and the incorporation of finely ground inorganic filler became available, through efforts of the Paffenbarger Research Center at the National Institutes for Science and Technology, that serious consideration for use of resin-based, direct, esthetic restorative materials became a reality.[5]. This gave clinicians what they wanted, namely a direct, esthetic restorative material that literally quickly “set on command,” when the clinician decided the moment for polymerization was needed.[10]
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