Joerg Franke

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A Prospective randomised controlled study was done to determine statistical difference between the standard microsurgical discotomy (MC) and a minimally invasive microscopic procedure for disc prolapse surgery by comparing operation duration and clinical outcome. Additionally, the transferability of the results was determined by a bicentric design. The(More)
UNLABELLED Surgery on the degenerative cervical spine disorders aims at decompression of the neural structures and restoring the physiological profile of the cervical spine. The aims of internal fixation are to gain primary stability, introduce a bony fusion and to correct the shape of the spine. The present study will give answers to the following(More)
BACKGROUND Image-guided spinal instrumentation reduces the incidence of implant misplacement. OBJECTIVE To assess the accuracy of intraoperative computed tomography (iCT)-based neuronavigation (iCT-N). METHODS In 35 patients (age range, 18-87 years), a total of 248 pedicle screws were placed in the cervical (C1-C7) and upper and midthoracic (T1-T8)(More)
BACKGROUND Image-guided spinal instrumentation may reduce complications in spinal instrumentation. OBJECTIVE To assess accuracy, time efficiency, and staff radiation exposure during thoracolumbar screw instrumentation guided by intraoperative computed tomography (iCT)-based neuronavigation (iCT-N). METHODS In 55 patients treated for idiopathic and(More)
Maximal voluntary contraction changes the mechanical properties of skeletal muscle. Using ultrasound, we investigated whether these changes are reflected by changes in muscle architecture in the vastus lateralis muscle of 8 healthy volunteers. The mean pennation angle during the time interval from 3 to 6 min after maximal voluntary contraction (late(More)
This study investigated the effects of aerobic capacity on brain structure and memory performance. A sample of 33 healthy young subjects completed (i) assessment of aerobic capacity based on blood-lactate concentration, (ii) structural magnetic resonance imaging (MRI) scanning and analysis of grey matter density using voxel-based morphometry (VBM) and (iii)(More)
Bipedalism is a distinguishing feature of the human race and is characterised by a narrow base of support and an ergonomically optimal position thanks to the appearance of lumbar and cervical curves. The pelvis, adapted to bipedalism, may be considered as the pelvic vertebra connecting the spine to the lower limbs. Laterally, the body’s line of gravity is(More)
Recombinant human Bone Morphogenetic Protein-2 (rhBMP-2) can replace autogenous bone grafting in single-level lumbar interbody fusion. Its use is associated with a higher initial price for the intervention; 2,970€ in Germany, 2,950€ in France and 2,266€ (£1,790) in UK. The aim of this study was to calculate the financial impact of rhBMP-2 treatment in(More)
AIM Determination of the reliability of ultrasonography as a diagnostic tool for rupture of the quadriceps tendon and for follow-up after surgical repair. METHOD 11 patients (12 tendons) with a clinical suspicion of quadriceps tendon rupture were studied with ultrasonography in two planes. RESULTS In 9 cases we were able to confirm the results of the(More)