Tooth loss reduces the masticatory ability, compromises esthetics, and may consequently diminish social interactions, which could significantly impact on the quality of life of individuals [1,2,3]. Treatment options for teeth loss are continuously evolving, from the removable prosthesis to the increasing preference for fixed choices. Furthermore, the progress in the manufacturing of titanium implants added to their long-term success, increasing the fixed prosthetic options for replacement of missing teeth, making implants an essential part of contemporary dental practice and a popular choice for both patients and clinicians [4].

An implant impression is primarily a three-dimensional record of the implant and the surrounding tissues. Impression accuracy is a significant factor in implant long-term success. Inaccuracies or errors occurring at any stage of the superstructure construction may lead to a lack of precision fit between various components. The lack of potential compensatory readjustment, due to the absence of intervening periodontal ligament, may have the consequence of related complications or failure [5, 6].

The fit of an implant superstructure is considered “passive” if it does not create or lead to any static loading within the prosthesis, or in the surrounding bone. Imperfections in the precision fit may increase the incidence of mechanical problems or abutment loosening as well as possible fracture of the prosthetic or implant components. Furthermore, any resultant marginal discrepancies as a consequence of inaccurate impressions may enhance plaque accumulation, which would impact negatively on the soft and hard tissues around the implant [7].

The research on implant impression accuracy is mostly from in vitro studies, and the limited number of clinical studies might be contributing to the controversy as to which technique should be considered to be more superior [5, 8]. We hypothesize that clinically, there is no impact or differences in impression accuracy.

This study aimed to evaluate the accuracy of the open and closed implant impression techniques in partially edentulous patients with two adjacent implants.