Biomechanical evaluation and comparison of polyetheretherketone rod system to traditional titanium rod fixation

Ponnappan, Ravi K.; Serhan, Hassan; Zarda, Brett; Patel, Ravi R.; Albert, Todd J.; Vaccaro, Alexander R.

doi:10.1016/j.spinee.2008.08.002

Cited by 150 publications

(129 citation statements)

References 21 publications

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“…These implants consist of carbon fibers with reinforced polyetheretherketone (carbon/PEEK). They also have proven high performance properties in orthopedic implants on account of their high fatigue strength, low weight and improved load transfer to the bone [23]. Thus, stress shielding is reduced and bone healing is supported.…”

Section: New Hardware Materialsmentioning

confidence: 99%

CT and MRI Techniques for Imaging Around Orthopedic Hardware

Duong

Sutter

Skornitzke

et al. 2017

Fortschr Röntgenstr

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ZUSAMMENFASSUNGOrthopädische Implantate verringern die Bildqualität in der Schnittbildgebung. Bei steigendem Einsatz von orthopädi-schen Implantaten in einer alternden Bevölkerung ist eine Metallartefaktreduktion von zunehmender Bedeutung. Im folgenden Review möchten wir einen Überblick über die wesentlichen Artefakte in der Computertomografie und Magnetresonanztomografie sowie die neuesten Standards zur Verbesserung der Bildqualität geben. Alle Schritte der Bildakquisition von Gerätewahl über Scanvorbereitungen und -parameter bis hin zur Bildverarbeitung beeinflussen das Ausmaß der Metallartefakte. Technische Fortschritte wie die Dual-energy-Computertomografie mit der Option der Virtuellen monochromatischen Bildgebung sowie neue Implantatmaterialien bieten weitere Möglichkeiten der Metallartefaktreduktion in CT und MRT. Dezidierte MetallartefaktSequenzen beinhalten Algorithmen zur Artefaktreduktion und zur Verbesserung der Bildqualität des umgebenden Gewebes und sind essenzielle Werkzeuge in der orthopä-dischen Bildgebung zur frühzeitigen Detektion von postoperativen Komplikationen. ABSTR AC TOrthopedic hardware impairs image quality in cross-sectional imaging. With an increasing number of orthopedic implants in an aging population, the need to mitigate metal artifacts in computed tomography and magnetic resonance imaging is becoming increasingly relevant. This review provides an overview of the major artifacts in CT and MRI and state-ofthe-art solutions to improve image quality. All steps of image acquisition from device selection, scan preparations and parameters to image post-processing influence the magnitude of metal artifacts. Technological advances like dual-energy CT with the possibility of virtual monochromatic imaging (VMI) and new materials offer opportunities to further reduce artifacts in CT and MRI. Dedicated metal artifact reduction sequences contain algorithms to reduce artifacts and improve imaging of surrounding tissue and are essential tools in orthopedic imaging to detect postoperative complications in early stages.

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Section: New Hardware Materialsmentioning

confidence: 99%

CT and MRI Techniques for Imaging Around Orthopedic Hardware

Duong

Sutter

Skornitzke

et al. 2017

Fortschr Röntgenstr

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“…Due to PEEK's translucency to X-rays, radiographic evaluation is more accessible and precise, which simplifies the postoperative evaluation and decisions for further treatment. 7,9 By reinforcing PEEK with carbon fibers, the elastic modulus can be approximated to that of the cortical bone, which has been suggested to decrease stress shielding after spinal surgery compared to metal implants. 4,[10][11][12][13][14] The untreated surface of PEEK is bioinert and hydrophobic and it does not osseointegrate.…”

Section: Introductionmentioning

confidence: 99%

Biomechanical evaluation and surface characterization of a nano-modified surface on PEEK implants: a study in the rabbit tibia

Johansson¹,

Jimbo²,

Kjellin³

et al. 2014

IJN

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Polyether ether ketone (PEEK) is today frequently used as a biomaterial in different medical operations due to its excellent mechanical and chemical properties. However, the untreated surface of PEEK is bioinert and hydrophobic, and it does not osseointegrate in its pure form. The aim of this study was to evaluate a unique nano-modified surface of PEEK with respect to osseointegration. Forty-eight threaded, non-cutting PEEK implants were inserted bilaterally in the tibia of 24 rabbits. Half of the implants (n=24) were coated with nanocrystalline hydroxyapatite (test) and the remaining implants (n=24) were left uncoated (control). Half of the animals (n=12) were euthanized after 3 weeks of healing and the remaining (n=12) after 12 weeks. The implant retention was measured with a removal torque apparatus. Surface analysis was performed with interferometry, scanning electron microscopy, and X-ray photon spectroscopy to relate the removal torque to the applied surface. The test implants revealed a significantly higher retention after 3 weeks ( P =0.05) and 12 weeks ( P =0.028) compared to controls. The result of the present study proves that the addition of nanocrystalline hydroxyapatite coating to PEEK surfaces significantly increases its removal torque and biocompatibility.

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“…Poly ether ether ketone (PEEK) was introduced in spine surgery more than 10 years ago, mainly for producing cages to support and promote interbody fusion and is still used in most institutions [7,8]. Biomechanical studies [9,10] comparing Ti alloy rods to the new PEEK rods posterior systems demonstrated that they provide, under the same primary stability, increased load sharing on the anterior column and lower stress on the bone-screw interface, possibly reducing the rate of the above-mentioned complications. Being PEEK translucent to X-rays, the new rods cause less artefacts on CT scan making radiologic follow-up easier [9,11].…”

Section: Introductionmentioning

confidence: 99%