A Comparison between the New Method of Impression and Connected (Contiguous) Open-Tray Method in Implants

摘要

Despite various impression techniques were done for implant, the quarter of implant position and angle in the mouth is important. So, the aim of the current study was to determine comparison between the new method of impression and connected (contiguous) open-tray method in implants. In this study, 4 DIO implant analogues with the diameter of 3 mm and length of 12 mm were placed perpendicular to the surface of themandibular acrylic model. Times using open-tray technique and four times using acrylic model technique. In the first group (open-tray technique), the impression of copings was connected by duralay (resin pattern GC) and shoulder blade acrylic resin, and casted with the help of a special perforated tray and dental increase Silicon impression materials. In the second group, impression was conducted using acrylic model. In this way, instead of coping impression, DIO system titanium abutments, with a 2 mm cuff, height of 5.5 mm and a diameter of 4 mm, were used. Then the results compared using independent t-tests. Also, two way ANOVA test was also used to show the interaction of positioning and techniques. Results: these results suggest there is no significant difference between the mean absolute deviation of X and Y dimensions using two impression techniques (P>0.05) but a significant difference detected in Z line dimension (P<0.05). These results suggest replacement of open try technique with acrylic method needs more investigations