A solid bar splint for open-tray implant impression technique.

摘要

The passive fit of an implant-supported prosthesis is essential to long-term treatment success. Prosthesis misfit is likely to increase the incidence of prosthetic failures, such as screw loosening, fracture of implant restorations, or adverse loading to implants.One of'the most important steps for a passive fitis an accurate impression.The direct impression technique, which uses square transfer copings with an open tray, may offer greater transfer precision due to the splinting stability.7,8 Assif et al investigated the accuracy of direct implant impression techniques with the use of various splinting materials and found that more accurate results were obtained by using techniques in which autopolymerizing acrylic resin or impression plaster was used as a splinting material.Autopolymerizing acrylic resin is commonly used in-traorally to join impression copings during the opentray implant impression technique. However, distortion can result from the residual polymerization shrinkage of the resin used for splinting. The use of a solid bar may decrease the amount of polymerizing shrinkage due to the smaller amount of acrylic resin needed. In addition, there is improved efficiency and a reduction of chair time. This article describes the direct impression technique using square transfer copings splinted with a solid acrylic resin bar and autopolymerizing resin.