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Photogrammetric Impression Technique for the Rehabilitation of Multiple Dental Implants

Dentistry has developed from its past to today by becoming just about completely digitized. With the introduction of intraoral scanners (IOSs), the digitization process has become easier for clinicians. IOSs have important advantages in reducing human errors, patient burden, material complications, vomiting reflex and improving the fit of the prosthesis. Previous studies agreed that IOSs are clinically acceptable substitutes for conventional impression procedures in single crowns and short spam fixed dental prostheses. However, the impression for the full-arch restorations with IOS is still a challenge for clinicians. The photogrammetric system (PG) is an option instead of IOS for multiple implant-supported restorations. The PG has been used virtually in many science fields and Lie and Jemt introduced this accurate technic in dentistry. Photogrammetry (PG) is a technique for determining geometrical characteristics of objects and their 3D spatial orientation by recording digital images following a specific protocol. In photogrammetry, scans are recorded by an extraoral receiver, eliminating the need for overlapping images with intraoral scanners and, theoretically, positioning the 3-dimensional (3D) implants more accurately than intraoral scanners. The authors defined that the photogrammetric method was used to achieve levels of trueness and precision comparable with the conventional impression method. These case series aim to describe the use of the photogrammetric system as an accurate technique to record 3D implant positions of a full-arch maxillary fixed implant-supported rehabilitation.

Gökçen Ateş
Istanbul UniversityFaculty of Dentistry


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