Effect of soft tissue thickness on accuracy of conventional and digital implant impression techniques.

Background: Placing implants deep sub-gingivally may affect the accuracy of implant impression techniques and the fit of final restoration.

Purpose: The aim of this in-vitro study was to evaluate the effect of soft tissue thickness on accuracy of conventional and digital implant impression techniques.

Methods: Four parallel implant analogues (A, B, C, D) placed in each of two epoxy resin models representing edentulous mandible covered by flexible polyurethane material with two different thickness two mm and four mm.