الفهرس | Only 14 pages are availabe for public view |
Abstract The lack of passive fit between prosthesis and osseo-integrated dental implant is likely to increase the incidence of mechanical and biological complications23, 129. Reproducing the intraoral relationship of implants through impression procedures is the first step in achieving an accurate, passively fitting prosthesis25. A new implant impression tray with patent foil technology was introduced as a mean of acquiring precise pick-up impressions with ease19. The present in vitro study was carried out to compare the accuracy of casts produced by the newly introduced self-perforating tray against literature’s golden standard; the open custom tray with the use of different splinting techniques when taking impressions of multiple implants with different angulations. Forty impressions were taken of a master cast that contained two implant analogues with different angulations (0-15º) using two types of tray (custom) (n=20) and (self-perforating) (n=20) with different splinting techniques (Splinted) (n=20) and (Non-splinted) (n=20) using one step-double phase impression technique utilizing (putty soft& regular) consistency additional silicone. The acquired impressions were poured using type IV dental stone and a base of type II plaster made with a base forming device. The stone casts were positioned on a special platform using a positioning device and their respective inter-abutment distances were investigated using images acquired by a USB digital microscope with a 10x magnification and analyzed by Adobe Photoshop® CS6. Data was collected and statistically analyzed using SPSS® version 23.00. Results revealed that Impression taken with the custom tray produced significantly more accurate castings than the self-perforating tray. Splinting was found to significantly improve the accuracy of impression taken with the custom tray while it had no significant effect on self-perforating tray. |