Accuracy of angulated implant position transfer by two types of impression trays using splinted open tray technique

Abstract

Background and Objectives Accurate impression taking is a prerequisite for achieving passive fit between the implant and superstructure This study sought to assess the accuracy of impressions taken from deg and deg angulated implants by two plastic and metal stock trays using the splinted open tray technique Materials and Methods This in vitro experimental study was conducted on gypsum casts An acrylic model was fabricated with a first premolar to first premolar edentulous area and second premolar and first second and third molar teeth present in both sides Two implants were placed vertically at the site of lateral incisors At the site of first premolars one implant with deg angulation and another one with deg angulation relative to the midline were inserted Ten plastic and metal stock trays were used for open tray impression taking with addition silicon impression material at the site of copings Casts were poured and coded Measurements were made using coordinate measuring machine CMM The data were analyzed using t test for normally distributed data and non parametric tests for non normally distributed data Results The A distancewas plusmn mm in plastic and plusmn mm in metal tray group These values were plusmn mm and plusmn mm respectively for A plusmn and plusmn respectively for A plusmn and plusmn respectively for A and plusmn and plusmn respectively for A These differences were not statistically significant P gt Conclusion Both plastic and metal stock trays are accurate for position transfer of parallel and angulated implants in splinted open tray technique