Splinted vs. Nonsplinted Implant Impression Techniques

Investigators: Panos Papaspyridakos, DMD, ITI fellow; Virginia Hogsett (DMD 2013)

This retrospective clinical study includes 13 fully edentulous jaws, in which five to eight implants were placed in each jaw to support stress imposed by a permanent prosthesis. Implants for all patients were placed by one of two prosthodontists using a computer-guided system that standardizes the surgical procedures, as well as the placement and angulation of the implants. Two different implant impression techniques were used on each patient, one in which the abutments were splinted with acrylic resin and one in which they were not. Working casts were made from each type of impression to serve as the two test groups. Jigs serve as controls of the patients’ mouth, and were fabricated intraorally by connecting the abutments together will acrylic resin.

The hypothesis is that there is no clinically significant difference in the accuracy of different implant impression techniques. We will test this hypothesis by comparing splinted versus nonsplinted impression techniques using patient models. Accuracy will be determined by fit, as measured both macroscopically using an explorer tool and microscopically using microtomography (microCT).