The spine journal : official journal of the North American Spine Society
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We developed the technique of expansive lumbar laminoplasty in 1981. In the procedure of laminoplasty, the spinal canal is decompressed by rotatory elevation of the laminae, and bone grafts from the spinous process and posterior iliac bone are placed on the surface of the operated laminae. Therefore, adjacent segment disease due to mechanical stress could be anticipated in the long-term follow-up. ⋯ It should be taken into account that adjacent segment disease occurs after expansive lumbar laminoplasty. Spondylolisthesis might be a risk factor for the disease. Although reoperation was effective, it is necessary to consider the patient's age and physical condition before choosing further surgical therapy.
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Interbody spacers for anterior spine fusion are made of different materials, which can affect the postfusion magnetic resonance imaging (MRI) scans. Susceptibility artifacts specially for metallic implants can decrease the image quality. ⋯ Susceptibility artifacts were clearly affected by the implant material, shape, and implant volume. Independent of the implant material, with regard to a more advantageous IV/TAV and CSA/MAA relation, for larger implants the artifact rate was more limited to the implant's direct surroundings. On the basis of a high magnetizability for titanium implants with an equal IV, the range of implant-related susceptibility artifacts was influenced by the material as well as implant shape in favor of cylindric implants. According to the very low MRI artifact rate of carbon implants, the implant shape did not have any significant effect on the artifact behavior.