#Closed tray impression coping verification#

When the implants are sufficiently parallel to each other.The closed tray impression technique is utilized: Implant analogs are fastened to the copings and then the impression is sent to the laboratory for the fabrication of the definitive cast and occlusion rim. An alternate approach would be to make the definitive impression using a modified stock tray. The impression should record the edentulous ridges and contains the temporary or impression copings (Fig 3). The loaded custom tray is placed and a finger or Q-tip is used to wipe across the occlusal opening to expose the occlusal aspect of the copings so their screws can be located before polymerization of the impression material occurs and for subsequent easy access for loosening.Īfter the impression material polymerizes, the screws in the temporary copings are loosened and the impression removed. Monophase impression material can be used as a convenient and practical alternative to the combination of heavy-body and light-body consistency. Concurrently light-body impression material is expressed around the copings to capture the morphology of the soft tissue (Fig 2). The impression tray is coated with adhesive and loaded with heavy-body impression material.

#Closed tray impression coping verification#

Connecting the copings may assist in improving the accuracy of the definitive impression and cast and may facilitate fabrication of a verification jig. The temporary copings can be connected using flowable composite, impression plaster or acrylic resin (Fig 1). The open tray technique is specifically indicated, when the implants are not sufficiently parallel to allow an impression to be withdrawn from multiple impression copings. The open tray technique for making a definitive impression is one of two choices (the other being a closed tray impression) in the fabrication of a fixed complete denture.