Artefacts in multimodal imaging of titanium, zirconium and binary titanium-zirconium alloy dental implants: an in vitro study

TY - JOUR

T1 - Artefacts in multimodal imaging of titanium, zirconium and binary titanium-zirconium alloy dental implants: an in vitro study

AU - Smeets, Ralf

AU - Schöllchen, Maximilian

AU - Gauer, Tobias

AU - Aarabi, Ghazal

AU - Assaf, Alexandre T

AU - Rendenbach, Carsten

AU - Beck-Broichsitter, Benedicta

AU - Semmusch, Jan

AU - Sedlacik, Jan

AU - Heiland, Max

AU - Fiehler, Jens

AU - Siemonsen, Susanne

PY - 2017/2

Y1 - 2017/2

N2 - 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.

AB - 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.

U2 - 10.1259/dmfr.20160267

DO - 10.1259/dmfr.20160267

M3 - SCORING: Journal article

C2 - 27910719

VL - 46

SP - 20160267

JO - DENTOMAXILLOFAC RAD

JF - DENTOMAXILLOFAC RAD

SN - 0250-832X

IS - 2

ER -