title: Computer-aided placement of endosseous oral implants in patients after ablative tumour surgery: assessment of accuracy.
abstract: The objective of this study was to evaluate the feasibility and accuracy of a novel surgical computer-aided navigation system for the placement of endosseous implants in patients after ablative tumour surgery. Pre-operative planning was performed by developing a prosthetic concept and modifying the implant position according to surgical requirements after high-resolution computed tomography (HRCT) scans with VISIT, a surgical planning and navigation software developed at the Vienna General Hospital. The pre-operative plan was transferred to the patients intraoperatively using surgical navigation software and optical tracking technology. The patients were HRCT-scanned again to compare the position of the implants with the pre-operative plan on reformatted CT-slices after matching of the pre- and post-operative data sets using the mutual information-technique. A total of 32 implants was evaluated. The mean deviation was 1.1 mm (range: 0-3.5 mm). The mean angular deviation of the implants was 6.4 degrees (range: 0.4 degrees - 17.4 degrees, variance: 13.3 degrees ). The results demonstrate, that adequate accuracy in placing endosseous oral implants can be delivered to patients with most difficult implantologic situations.
authors.affiliation: University Hospital of Cranio-Maxillofacial and Oral Surgery, Medical School, University of Vienna, Vienna, Austria. arne.wagner@univie.ac.at
authors.forename: Arne
authors.initials: A
authors.lastname: Wagner
authors.forename: Felix
authors.initials: F
authors.lastname: Wanschitz
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Birkfellner
authors.forename: Konstantin
authors.initials: K
authors.lastname: Zauza
authors.forename: Clemens
authors.initials: C
authors.lastname: Klug
authors.forename: Kurt
authors.initials: K
authors.lastname: Schicho
authors.forename: Franz
authors.initials: F
authors.lastname: Kainberger
authors.forename: Christian
authors.initials: C
authors.lastname: Czerny
authors.forename: Helmar
authors.initials: H
authors.lastname: Bergmann
authors.forename: Rolf
authors.initials: R
authors.lastname: Ewers
mesh_terms: D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D005240:Feasibility Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D007573:Jaw Neoplasms / Q000601:surgery*; D010347:Patient Care Planning; D019651:Plastic Surgery Procedures; D012984:Software; D025321:Surgery, Computer-Assisted / Q000706:statistics & numerical data; D014057:Tomography, X-Ray Computed
chemical_list: D015921:Dental Implants