title: Artefacts in magnetic resonance imaging caused by dental material.
abstract: A common problem in computer tomography (CT) based imaging of the oral cavity is artefacts caused by dental restorations. The aim of this study was to investigate whether magnetic resonance imaging (MRI) of the oral cavity would be less affected than CT by artefacts caused by typical dental restorative alloys. In order to assess the extent of artefact generation, corresponding MRI scans of the same anatomic region with and without dental metal restorations were matched using a stereotactic frame. MRI imaging of the oral and maxillofacial region could be performed without reduction of the image quality by metallic dental restorations made from titanium, gold or amalgam. Dental restorations made from titanium, gold or amalgam did not reduce the image quality of the MRI sequence used in imaging of the oral and maxillofacial region for dental implant planning. In this respect MRI is superior to CT in implant planning.
authors.affiliation: Department of Oral and Cranio-Maxillofacial Surgery, Heidelberg University Hospital, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany. georg.eggers@med.uni-heidelberg.de
authors.forename: Georg
authors.initials: G
authors.lastname: Eggers
authors.forename: Marcus
authors.initials: M
authors.lastname: Rieker
authors.forename: Bodo
authors.initials: B
authors.lastname: Kress
authors.forename: Jochen
authors.initials: J
authors.lastname: Fiebach
authors.forename: Hartmut
authors.initials: H
authors.lastname: Dickhaus
authors.forename: Stefan
authors.initials: S
authors.lastname: Hassfeld
mesh_terms: D000818:Animals; D016477:Artifacts; D003722:Dental Alloys; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D066298:In Vitro Techniques; D007568:Jaw / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008670:Metals; D011859:Radiography; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013552:Swine
chemical_list: D003722:Dental Alloys; D008670:Metals