Clinical Research Directory

Fully Versus Partially Guided Implants Placement: Measurement of Accuracy of Implant Position and Passivity of Superstructures.

compare fully versus partially guided all on four implants placement immediately loaded by maxillary and mandibular screw retained overdentures: A radiographic and photogrammetric measurement of accuracy of implant position and passivity of superstructures. The measurements will be done as follows: 1. Photogrammetric scan immediately after implant instalments to measure 3D accuracy of implant position and Passivity of super structure 2. Cone beam X ray to measure the implant marginal bone height changes. 3. Implant marginal soft tissue evaluations including pocket probing depth, plaque and gingival indices. Evaluation will be done immediately, one and two years after loading.

Accuracy of Full Arch Intraoral Scanning

Although an intraoral scanner IOS can offer the clinician a completely digital workflow, achieving trustworthy digital scans in edentulous jaws is challenging because of the lack of fixed anatomical landmarks. From this perspective, several methods have been proposed to improve the accuracy of digital scanning, however, related results remain inconclusive, and previously proposed devices have had limitations, such as bulkiness, excessive manufacturing requirements, and poor commercial applicability. Thus, this study aims to clinically compare the effect of conventional versus photogrammetry intraoral scanning methods on the passive fit of mandibular all-on four screw-retained frameworks.