Purpose: The purpose of this in vitro study was to evaluate the effect plastic impression transfer copings on dimensional accuracy close tray implant impressions. Methods: A master model constructed using autopolymerizing acrylic resin. Five parallel holes were drilled for analogs. Custom trays made with polymethyl methacrylate consisted 2 groups (n=5): (group 1) Impression obtained coping 2) w...

Surface reproduction was evaluated for epoxy resin and polyether resin dies as well as for gypsum dies by observing the changes in roughness. Significant differences were found by the interaction of the impression and the dies. The resin dies generally showed better results than the gypsum dies when the elastomeric impressions were used. Especially the resin dies were both excellent in surface ...

Purpose: To investigate accuracy of dies obtained from different double-step putty-wash impression techniques. Materials and method: A master model was constructed having Co-Cr abutments (Remanium Star, Dentaurum, Germany) in a custom made acrylic dentoform (VertexDental B.V., The Netherlands) representing condition of missing maxillary left first molar. Impressions (Express, 3M ESPE, USA) were...

STATEMENT OF PROBLEM Movement of pick-up type impression copings inside the impression material during clinical and laboratory phases may cause inaccuracy in transferring the spatial position of implants from the oral cavity to the master cast. As a consequence, the laboratory technician may fabricate a restoration that requires corrective procedures. PURPOSE This in vitro study evaluated the...

The handling of vinyl polysiloxane (addition silicone) impression putties with latex gloves is said to interfere with the setting of these impression materials. The aim of this study is to evaluate the effect of handling techniques on the setting of vinyl polysiloxane impression putties using several types of gloves. The setting of these materials was evaluated by means of an elasticimeter. Fou...