The interobserver-validated relevance of intervertebral spacer materials in MRI artifacting

Ernstberger, Thorsten; Heidrich, Gabert; Bruening, Thomas H.; Krefft, S.; Buchhorn, Gottfried; Klinger, Hans-Michael

doi:10.1007/s00586-006-0064-5

Cited by 30 publications

(26 citation statements)

References 22 publications

(20 reference statements)

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“…Three-dimensional (3D) approaches (MRI and CT) suffer from artifacts due to the orthopaedic metallic hardware required to secure massive allografts [10,16]. To overcome these issues, we developed dynamic contrast-enhanced (DCE)-MRI as a quantitative assessment tool of intramedullary vascularity in a canine ostectomy model and cone beam (CB)-CT to quantify new bone formation around massive allografts [7].…”

Section: Introductionmentioning

confidence: 99%

Quantifying Massive Allograft Healing of the Canine Femur In Vivo and Ex Vivo: A Pilot Study

Santoni

Ehrhart

Betancourt-Benitez

et al. 2012

Clinical Orthopaedics &Amp; Related Research

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Background Allograft integration in segmental osseous defects is unpredictable. Imaging techniques have not been applied to investigate angiogenesis and bone formation during allograft healing in a large-animal model. Questions/purposes We used dynamic contrast-enhanced (DCE)-MRI and cone beam (CB)-CT to quantify vascularity and bone volume in a canine femoral allograft model and determined their relationship with biomechanical testing and histomorphometry. Methods Femoral ostectomy was performed in three dogs and reconstructed with a 5-cm allograft and compression plate. At 0.5, 3, and 6 months, we performed DCE-MRI to quantify vascular permeability (Ktrans) and perfused fraction and CB-CT to quantify bone volume. We also performed posteuthanasia torsional testing and dynamic histomorphometry of the grafted and nonoperated femurs. Results DCE-MRI confirmed the avascular nature of allograft healing (perfused fraction, 2.08%-3.25%). CB-CT demonstrated new bone formation at 3 months (26.2, 3.7, and 2.2 cm 3

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Section: Introductionmentioning

confidence: 99%

Quantifying Massive Allograft Healing of the Canine Femur In Vivo and Ex Vivo: A Pilot Study

Santoni

Ehrhart

Betancourt-Benitez

et al. 2012

Clinical Orthopaedics &Amp; Related Research

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“…Carbon allowed superior evaluation of local implant situation and pathological process while maintaining a lower susceptibility to cause image artifact. [24] …”

Section: Cervical Spinementioning

confidence: 99%

Utility of Carbon Fiber Implants in Orthopedic Surgery: Literature Review

Hillock¹,

Howard²

2014

JISRF

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Carbon fiber (CF) consists of a multitude of unique physical, chemical and biological characteristics that can be utilized and exploited for a number of diverse applications. Found in aerospace systems, structural elements, energy storage and other products, the most recent application of CF has expanded into the realm of surgical implants. The material properties of CF, historical development and applications and methods of manufacturing are illustrated upon. The various surgical applications of CF are defined, from biocompatibility within the human body and wound healing products to numerous surgical implantations. Keywords: carbon fiber; orthopedics; historical review

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“…We selected a matrix of 512 x 512 pixels combined with a field of view (FOV) of 500 mm. The T1w-TSE sequence has been established to produce the best imaging results for implants and the least amount of intrinsic artifacting [3,5,6,[8][9][10]12,20]. Using a current version of DICOM reader software, one author (TE) measured the artifact area on the scan of each of the nine implants six times; 54 individual tracings were recorded and analyzed.…”

Section: Magnetic Resonance Imagingmentioning

confidence: 99%

“…Spacers made of these non-metallic biomaterials do not suffer from the postoperative diagnostic problems of titanium because carbon produces a very low rate of artifacting, and its radiolucency properties allow easier evaluation of the fusion process by MRI [3]. The modulus of elasticity of CFRPs affords good load-bearing with sufficient hardness.…”

Section: Introductionmentioning

confidence: 99%

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Intervertebral test spacers and postfusion MRI artifacting: A comparative in vitro study of magnesium versus titanium and carbon fiber reinforced polymers as biomaterials

2009

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AbstractIntervertebral spacers are made of different materials, which can effect the postfusion magnetic imaging (MRI) scans. Susceptibility artifacts specially for metallic implants can decrease the image quality. This study aimed to determine whether magnesium as a lightweight and biocompatible metal is suitable as a biomaterial for spinal implants based on its MRI artifacting behavior. To compare artifacting behaviors, we implanted into one porcine cadaveric spine different test spacers made of magnesium, titanium and CFRP. All test spacers were scanned using 2 T1-TSE MRI sequences. The artifact dimensions were traced on all scans and statistically analyzed. The total artifact volume and median artifact area of the titanium spacers were statistically significantly larger than magnesium spacers (p < 0.001), while magnesium and CFRP spacers produced almost identical artifacting behaviors (p > 0.05). Our results suggest that spinal implants made with magnesium alloys will behave more like CFRP devices in MRI scans.

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The interobserver-validated relevance of intervertebral spacer materials in MRI artifacting

Cited by 30 publications

References 22 publications

Quantifying Massive Allograft Healing of the Canine Femur In Vivo and Ex Vivo: A Pilot Study

Quantifying Massive Allograft Healing of the Canine Femur In Vivo and Ex Vivo: A Pilot Study

Utility of Carbon Fiber Implants in Orthopedic Surgery: Literature Review

Intervertebral test spacers and postfusion MRI artifacting: A comparative in vitro study of magnesium versus titanium and carbon fiber reinforced polymers as biomaterials

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