Accuracy of different Implant Impressions utilizing recent self-perforating tray with and without external supporting splint

Abstract

Thelackof passivefitbetweenprosthesisand osseo-integrated dentalimplantislikelytoincreasethe incidenceofmechanical and biologicalcomplications23, 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 vitrostudy 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.