Internal Prosthetic Manual - BioHorizons

IMPRESSION TECHNIQUESOverviewThere are three types of impression techniquesutilized in implant dentistry:Prepared Abutment – An intra-oral impression ismade of prepared abutment(s), similar to a standardcrown & bridge impression.Implant-level – An intra-oral impression is madetransferring the emergence of the implant. Theimplant’s location and angle are recorded, with orwithout the orientation of the internal hex.Abutment-level – An intra-oral impression is madeof Abutments for Screw that have been placed ontothe implants. Abutments for Screw location andangle are recorded for screw-retained prosthesis.Prepared AbutmentImpression Technique OptionsImplant-level and abutment-level impressions canbe made by either of the following techniques:Closed Tray (Indirect) Transfer TechniqueorOpen Tray (Direct) Pick-up TechniquePrepared Abutment impressions are always madeusing the Closed Tray technique.Implant-levelThe option chosen is dependent on the treatmentplan and the degree of accuracy needed to fabricatethe final restoration. The Open Tray Technique ismore accurate than the Closed Tray Technique andis recommended in multiple-unit restorations.See the facing page for details on the two options.Abutment-levelshop online at www.biohorizons.com10