Three-Dimensional Radiographic Evaluation of the Malar Bone Engagement Available for Ideal Zygomatic Implant Placement.

Autor:	Pellegrino G; University Researcher of Medical-technical Science, Oral and Maxillofacial Surgery Unit, DIBINEM, University of Bologna, 40125 Bologna, Italy., Grande F; Teaching Tutor, Oral Surgery Unit, DIBINEM, University of Bologna, 40125 Bologna, Italy., Ferri A; Contractor of Oral and Maxillofacial Surgery Unit, DIBINEM, University of Bologna, 40125 Bologna, Italy., Pisi P; University Researcher of Dental Radiology, DIBINEM, University of Bologna, 40125 Bologna, Italy., Gandolfi MG; Associate Professor of Medical-technical Science, DIBINEM, University of Bologna, 40125 Bologna, Italy., Marchetti C; Professor of Maxillo-facial Surgery and Chief of Oral and Maxillofacial Surgery Unit, DIBINEM, University of Bologna, 40125 Bologna, Italy.
Jazyk:	angličtina
Zdroj:	Methods and protocols [Methods Protoc] 2020 Jul 22; Vol. 3 (3). Date of Electronic Publication: 2020 Jul 22.
DOI:	10.3390/mps3030052
Abstrakt:	Zygomatic implant rehabilitation is a challenging procedure that requires an accurate prosthetic and implant plan. The aim of this study was to evaluate the malar bone available for three-dimensional zygomatic implant placement on the possible trajectories exhibiting optimal occlusal emergence. After a preliminary analysis on 30 computed tomography (CT) scans of dentate patients to identify the ideal implant emergencies, we used 80 CT scans of edentulous patients to create two sagittal planes representing the possible trajectories of the anterior and posterior zygomatic implants. These planes were rotated clockwise on the ideal emergence points and three different hypothetical implant trajectories per zygoma were drawn for each slice. Then, the engageable malar bone and intra- and extra-sinus paths were measured. It was possible to identify the ideal implant emergences via anatomical landmarks with a high predictability. Significant differences were evident between males and females, between implants featuring anterior and those featuring posterior emergences, and between the different trajectories. The use of internal trajectories provided better bone engagement but required a higher intra-sinus path. A significant association was found between higher intra-sinus paths and lower crestal bone heights.
Databáze:	MEDLINE
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