OBJECTIVES: To analyze and evaluate imaging artefacts induced by zirconium, titanium and titanium-zirconium alloy dental implants. METHODS: Zirconium, titanium and titanium-zirconium alloy implants were embedded in gelatin and MRI, CT and CBCT were performed. Standard protocols were used for each modality. For MRI, line-distance profiles were plotted to quantify the accuracy of size determination. For CT and CBCT, six shells surrounding the implant were defined every 0.5 cm from the implant surface and histogram parameters were determined for each shell. RESULTS: While titanium and titanium-zirconium alloy induced extensive signal voids in MRI owing to strong susceptibility, zirconium implants were clearly definable with only minor distortion artefacts. For titanium and titanium-zirconium alloy, the MR signal was attenuated up to 14.1 mm from the implant. In CT, titanium and titanium-zirconium alloy resulted in less streak artefacts in comparison with zirconium. In CBCT, titanium-zirconium alloy induced more severe artefacts than zirconium and titanium. CONCLUSIONS: MRI allows for an excellent image contrast and limited artefacts in patients with zirconium implants. CT and CBCT examinations are less affected by artefacts from titanium and titanium-zirconium alloy implants compared with MRI. The knowledge about differences of artefacts through different implant materials and image modalities might help support clinical decisions for the choice of implant material or imaging device in the clinical setting.
OBJECTIVES: To analyze and evaluate imaging artefacts induced by zirconium, titanium and titanium-zirconium alloy dental implants. METHODS:Zirconium, titanium and titanium-zirconium alloy implants were embedded in gelatin and MRI, CT and CBCT were performed. Standard protocols were used for each modality. For MRI, line-distance profiles were plotted to quantify the accuracy of size determination. For CT and CBCT, six shells surrounding the implant were defined every 0.5 cm from the implant surface and histogram parameters were determined for each shell. RESULTS: While titanium and titanium-zirconium alloy induced extensive signal voids in MRI owing to strong susceptibility, zirconium implants were clearly definable with only minor distortion artefacts. For titanium and titanium-zirconium alloy, the MR signal was attenuated up to 14.1 mm from the implant. In CT, titanium and titanium-zirconium alloy resulted in less streak artefacts in comparison with zirconium. In CBCT, titanium-zirconium alloy induced more severe artefacts than zirconium and titanium. CONCLUSIONS: MRI allows for an excellent image contrast and limited artefacts in patients with zirconium implants. CT and CBCT examinations are less affected by artefacts from titanium and titanium-zirconium alloy implants compared with MRI. The knowledge about differences of artefacts through different implant materials and image modalities might help support clinical decisions for the choice of implant material or imaging device in the clinical setting.
Authors: R Schulze; U Heil; D Gross; D D Bruellmann; E Dranischnikow; U Schwanecke; E Schoemer Journal: Dentomaxillofac Radiol Date: 2011-07 Impact factor: 2.419
Authors: O Tymofiyeva; S Vaegler; K Rottner; J Boldt; A J Hopfgartner; P C Proff; E J Richter; P M Jakob Journal: Dentomaxillofac Radiol Date: 2013-04-22 Impact factor: 2.419
Authors: P F New; B R Rosen; T J Brady; F S Buonanno; J P Kistler; C T Burt; W S Hinshaw; J H Newhouse; G M Pohost; J M Taveras Journal: Radiology Date: 1983-04 Impact factor: 11.105
Authors: Alexandre T Assaf; Tomislav A Zrnc; Chressen C Remus; Michael Schönfeld; Christian R Habermann; Björn Riecke; Reinhard E Friedrich; Jens Fiehler; Max Heiland; Jan Sedlacik Journal: J Craniomaxillofac Surg Date: 2014-04-13 Impact factor: 2.078
Authors: Katrine Mølgaard Johannsen; João Marcus de Carvalho E Silva Fuglsig; Brian Hansen; Ann Wenzel; Rubens Spin-Neto Journal: Oral Radiol Date: 2022-09-30 Impact factor: 1.882
Authors: Tim Hilgenfeld; Marcel Prager; Franz S Schwindling; Johann M E Jende; Peter Rammelsberg; Martin Bendszus; Sabine Heiland; Alexander Juerchott Journal: J Vis Exp Date: 2018-05-17 Impact factor: 1.355