طراحي و ساخت مدل آزمايشگاهي جهت بررسي دقت و تكنيك هاي مختلف مواد قالب گيري

Evaluation of the carreut techniques of impression for their accuracy wsing a fabricated model

Background: A laboratory model is needed for investigating the techniques and accuracy of impression materials. There are three techniques of making a laboratory model: 1. Replica method 2. Simulation method 3. Abstract method Aim: This laboratory model was prepared on the basis of simulation method, to test ifs reliability. Material and Methods: This model consisted of two individnal dies (one with an undercut under its margin and the other one without us chundercut). Special tray and guide rods were used to unify special trays path of insertion and exertion on the dies.