Accuracy of digital lower complete implant assisted overdenture fabricated by two different pick up techniques

Abstract

Background Digital technology and its application in the design and fabrication of a single tooth to a complete prosthesis is advancing rapidly. The aim of this work was to evaluate the accuracy of digital implant assisted lower complete overdenture using two different pick-up techniques. Methods This experimental study was carried out on a mandibular completely edentulous model from epoxy resin material. Fourteen digital Implant Assisted Complete overdenture (IACOs) were fabricated and divided into two equal groups, seven digital complete denture before the two implant placement (group I), and seven digital implant assisted overdenture after two implant placement (group II). Results There was high significant difference between both groups as regards trueness and precision, with less mean deviation value of group II. For tissue surface adaptation at selected areas, there was no significant difference between both groups except at implant area. For group I, the left implant showed more pressure than the right implant, while both implants in group II showed no significant difference. The average surface adaptation values at right and left implant area showed significant difference with less average values in group II compared to group I. Conclusions IAOs (group II) showed better trueness, precision, and surface tissue adaptation than Group I digital complete denture where implant position in fitting surface added manually. The overall fit in group II was better than group I.