![]() ![]() However, due to its complicated operation, photogrammetry technology could not be further applied in clinical practice. reported that photogrammetry technology could successfully record the implant replica positions of an edentulous mandible cast, and the accuracy of this technology was comparable to that of the conventional impression technique. As early as 1994, photogrammetry technology was introduced to implant dentistry to detect the marginal adaptation between the prosthesis and the implants. Photogrammetry technology is a method of making precise measurements by using reference points in photographs. When scanning a complete edentulous arch, multiple clinical factors have been proven to influence the accuracy of intraoral scanning, such as intraoral scanner brand, ambient light, scan body types, interimplant distance, scanning range, characteristics of the mucosa, movable mucosa, and scanning pattern. However, whether intraoral scanners can be applied to complete-arch implant impressions is still questionable. The accuracy of intraoral scanners used with implant-supported single crown and short-span restorations has been recognized. Intraoral scanning is a widely used digital impression technique in clinical practice. With the development of CAD/CAM, digital impression methods have gained popularity in implant dentistry. Moreover, the accuracy of definitive casts is influenced by multiple factors, for instance, impression materials, matching tolerance of components and dimensional changes in master cast. The splined open-tray impression technique provides acceptable clinical results, but it requires complicated procedures that are time consuming and discomfortable for the patient. In the workflow of conventional procedures, the splinted open-tray impression technique is mostly used to transfer the implant positions from the patient’s mouth through the impression material. Accurately recording implant locations is an integral prerequisite for fabricating an accurately fitting prosthesis, either by digital or conventional impression techniques. ![]() It is generally believed that the passive fit of a prosthesis is a key factor affecting the long-term success of implant-fixed complete dental prostheses, and a compromised fit may cause a series of mechanical and biological complications. The Creative Commons Public Domain Dedication waiver ( ) applies to the data made available in this article, unless otherwise stated in a credit line to the data. ![]() ![]() If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. ![]()
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