![]() Within the limits of this study, the mounting fixture transferred the implant position with the same accuracy as the open-tray implant level impression with respect to point deviations. See Table 11.3.1 for a comparison of the latter types. In a surface comparison, the open-tray implant level impression showed mean deviations of 36.0 µm and a mounting fixture of 2.0 µm (p > 0.05). Impression techniques used in implant dentistry include abutment-level impressions, both direct and indirect and implant-level impressions, both pick-up (open-tray) and transfer (closed-tray). A passive fit is the objective, as a misfit may lead to stress placed on the implants, resulting in bone loss and even loss of integration. Impressions for multiple implant restorations are even more critical. Implants do not have a periodontal ligament that may allow for minor inaccuracies such as in teeth. The fit of implant prostheses requires extreme accuracy due to the precise machine fit and the rigid connection to bone. Silicone tends to have a favourable modulus of elasticity that allows simpler removal from the mouth, especially in soft-tissue undercuts. Silicone impression materials have better biomechanical stability than polyether, which is susceptible to moisture and sunlight. ![]() There are several ways to rehabilitate patients using dental implants. The use of polyether or additional polyvinyl siloxane has been recommended. Figures 8 and 9 show the clinical step of an impression at the implant level and impressions at the abutment level (restoration at implant level/restoration at abutment level). The requirements of impression materials include: Soft-tissue contour (emergence profile).A poor impression may lead to an inaccurately fitting prosthesis or compromised result, which may add to the cost incurred as well as extend treatment times and inconvenience for the patient. An impression is usually made at the implant level or abutment level with an elastomeric impression material such as polyether or polyvinyl siloxane. Additionally, this captures the soft-tissue contours that frame the restoration, providing the pink aesthetic frame around the tooth. This clinical report describes the use of. In most cases, the Temporary Abutment is customized by the dental technician. clinician or in the laboratory by the dental technician. An impression is necessary to transfer the position and design of an implant or abutment to a master cast. An implant-level impression is often desired for designing and fabricating an implant-supported fixed restoration. Implant-level impression 12 Permanent implant restoration Atlantis® abutments 15 Direct Abutment 17 TiDesign 21 ZirDesign 23 CastDesign 26 Torque guide 29.
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