Magnetic resonance imaging in zirconia-based dental implantology

Objectives X‐ray‐based planning and post‐implantation assessment of titanium implants is the commonly accepted standard to date. However, new implant materials such as zirconia (ZrO2) have become available, and magnetic resonance imaging may be a valuable alternative with these implants. The present...

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Bibliographic Details
Published in:	Clinical oral implants research Vol. 26; no. 10; pp. 1195 - 1202
Main Authors:	Duttenhoefer, Fabian, Mertens, Marianne E., Vizkelety, Josef, Gremse, Felix, Stadelmann, Vincent A., Sauerbier, Sebastian
Format:	Journal Article
Language:	English
Published:	Denmark Blackwell Publishing Ltd 01-10-2015
Subjects:	Animals computerized tomography cone beam ct Cone-Beam Computed Tomography Dental Implants Dental Materials Dentistry implantology magnetic resonance imaging Magnetic Resonance Imaging - methods Mandible - diagnostic imaging Radiography, Dental - methods Radiography, Panoramic Swine Titanium X-ray imaging zirconia Zirconium cone beam ct implantology magnetic resonance imaging titanium zirconia computerized tomography X-ray imaging dental implants
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Summary:	Objectives X‐ray‐based planning and post‐implantation assessment of titanium implants is the commonly accepted standard to date. However, new implant materials such as zirconia (ZrO2) have become available, and magnetic resonance imaging may be a valuable alternative with these implants. The present in vitro study investigated artifacts produced by titanium and zirconia implants in magnetic resonance imaging (MRI) and assessed the accuracy of pre‐implant planning and post‐implantation assessment comparing MRI to standard X‐ray‐based imaging modalities: Orthopantomogram (OPT), cone beam (CBCT), and computed tomography (CT). Materials and methods Twelve porcine mandibles were prepared and scanned (MRI, OPT, CBCT, μCT), and bone height above the nerve canal was measured. Specimens were implanted with either two titanium or zirconia implants and rescanned to investigate the influence of implant materials on post‐implantation assessment. MRI and μCT artifacts were quantified with implants embedded in gelatin phantoms and porcine specimens. Results Compared with CBCT set as standard, μCT, OPT, and MRI showed similar accuracy in pre‐op bone height measurements. Post‐implantation, while titanium implants induced a strong B0‐field distortion resulting in extensive signal voids, zirconia implants were clearly depictable with only minor distortions. Conclusions Excellent contrast, limited artifacts, radiation‐free and accurate implant assessment may indicate that MRI is a valuable imaging alternative for zirconia‐based implant dentistry.
Bibliography:	Dentalpoint AG, Switzerland ark:/67375/WNG-MFG64TM7-Q ArticleID:CLR12430 Camlog Foundation, Switzerland istex:0B629A065FA4B6CBBC70AE245A75C095856ED98C ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0905-7161 1600-0501
DOI:	10.1111/clr.12430