Evaluation of Polymerization Shrinkage of Provisional Materials Based on Di-Methacrylate (in Vitro)

Background& Objective: Acrylic resin, poly-methacrylate provisional materials, have been no longer used because of low strength, poor marginal fit, low resistance, and color stability. New resin systems, such as higher (meth) acrylates, and di-methacrylate were developed to improve the mechanical and physical properties. Investigate polymerization shrinkage-strain, and Exo-thermic peak-temperatures of three new provisional materials based on di-methacrylate, and one of mono-methacrylate.