Aims and objectives
Magnesium (Mg) alloys have recently been rediscovered as biodegradable implants in musculoskeletal surgery [1,2].
A major advantage of Mg-based biomaterials is their property to produce only little artifacts in the common imaging modalities .
there is very limited experience with imaging of Mg-based orthopedic materials.
This study is an ex-vivo trial to evaluate the imaging characteristics of Mg implants in different imaging modalities as compared to conventional titanium (Ti)...
Methods and materials
A CE-approved Mg Herbert screw (MAGNEZIX®) and a Ti screw of the same dimensions (3.2x20 mm) were imaged using different modalities: digital radiography (DX),
multidetector computed tomography (MDCT),
high resolution flat panel CT (FPCT) and magnetic resonance imaging (MRI).
The screws were scanned native and after implantation in a fresh chicken tibia in order to simulate surrounding bone and soft tissue.
Different scanning protocols and screw positions with respect to the longitudinal...
In all modalities,
the artifacts generated by the Mg screw had a lesser extent and were less severe as compared to the Ti screw.
The mean difference of artifact size of the native screws was in DX: 0.7 mm,
MDCT: 6.2 mm,
FPCT: 5.9 mm,
MRI PD TSE: 2.6 mm and in MRI T1: 4.5 mm with p < 0.005.
1 illustrates the artifacts in a FPCT scan of a Mg and a Ti screw without any surrounding soft or bony tissue.
Moreover it demonstrates the superiority of a 3D reconstruction of the Mg screw in...
Mg implants generate significantly less artifacts in common imaging modalities as compared with conventional implants and therefore may facilitate post-operative follow-up.
and Jag Sankar.
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and J.A Planell.
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and Matthew B.
“Revolutionizing Orthopaedic Biomaterials: The Potential...