title: MicroCT-based evaluation of the trabecular bone quality of different implant anchorage sites for masticatory rehabilitation of the maxilla.
abstract: In the severely atrophied maxilla, implant anchorage in the zygomatic bone is considered a viable alternative to conventional dental implants with preceding bone augmentation procedures. The present microCT-based study compared the trabecular bone quality of the maxilla and zygomatic bone. MicroCT scanning was conducted in 12 halves of cadaver heads (5 male, 7 female) with edentulous, atrophied maxillae. Relevant trabecular bone quality parameters were determined in the anterior and posterior maxilla and in the zygomatic bone and compared by region and sex. Any difference in mean values between the anterior maxilla and the zygomatic bone was insignificant. Comparison of both with the posterior maxilla presented significantly higher values for bone volume fraction, surface density, and trabecular thickness and number, and significantly lower values for specific bone surface, structure model index, and trabecular separation. A significant sex-specific difference was not detected. The present microCT-based analysis is, to the best of our knowledge, the first intra-individual comparison of different implant anchorage sites for masticatory rehabilitation of the maxilla. The trabecular compartment of the zygomatic bone offered bone quality and, thus, an implant bed comparable with those of the anterior maxilla, and both were superior to the posterior maxilla.
authors.affiliation: Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna (Head: Prof. Christian Ulm, DMD, MD), Sensengasse 2a, A-1090 Vienna, Austria; Department of Periodontology, Faculty of Odontology, University of Malmö, Sweden. Electronic address: kristina.bertl@meduniwien.ac.at.
authors.forename: Kristina
authors.initials: K
authors.lastname: Bertl
authors.affiliation: Karl Donath Laboratory for Hard Tissue and Biomaterial Research, Division of Oral Surgery, Medical University of Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria; Ludwig Boltzmann Institute for Clinical and Experimental Traumatology, Vienna, Austria.
authors.forename: Patrick
authors.initials: P
authors.lastname: Heimel
authors.affiliation: Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna (Head: Prof. Christian Ulm, DMD, MD), Sensengasse 2a, A-1090 Vienna, Austria.
authors.forename: Michaela
authors.initials: M
authors.lastname: Rökl-Riegler
authors.affiliation: Center for Anatomy and Cell Biology, Department of Systematic Anatomy, Medical University of Vienna, Austria.
authors.forename: Lena
authors.initials: L
authors.lastname: Hirtler
authors.affiliation: Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna (Head: Prof. Christian Ulm, DMD, MD), Sensengasse 2a, A-1090 Vienna, Austria.
authors.forename: Christian
authors.initials: C
authors.lastname: Ulm
authors.affiliation: Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna (Head: Prof. Christian Ulm, DMD, MD), Sensengasse 2a, A-1090 Vienna, Austria.
authors.forename: Werner
authors.initials: W
authors.lastname: Zechner
mesh_terms: D001284:Atrophy; D015519:Bone Density / Q000502:physiology*; D002102:Cadaver; D000071556:Cancellous Bone / Q000000981:diagnostic imaging*; D015921:Dental Implants; D005260:Female; D006801:Humans; D007575:Jaw, Edentulous / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging*; D009929:Organ Size; D012737:Sex Factors; D055114:X-Ray Microtomography / Q000379:methods*; D015050:Zygoma / Q000000981:diagnostic imaging* / Q000601:surgery
chemical_list: D015921:Dental Implants
keywords: Dental implants; Maxilla; Micro-computed tomography; Zygoma