Open Tray Impression Technique Using the Direct Pick-Up Coping: A Case Report

Abstract

The success of implant-supported restorations relies on how well the hard and soft tissue information is transferred to the laboratory [1,2]. The critical aspect is to record the threedimensional orientation of the implant as it is present intraorally, other than reproducing fine surface detail for successful implant prosthodontic treatment [3-5]. The development of impression techniques to accurately record implant position has become more complicated and challenging. Several impression techniques have been suggested to obtain a master cast that will ensure the passive fit of prosthesis on implants [6]. In implant dentistry, the two traditional ways of making an impression are the closed tray and the open tray technique. Both impression techniques have their advantages and disadvantages [7]. A recent systematic review revealed that the open tray impression technique is more accurate than the closed tray impression technique [8,9]. It has been shown that the pickup type impression coping is the more accurate type of impression as errors occur on removal and replacement of the transfer type impression copings, especially in the occluso-gingival direction [10,11].