Gábor Ráthonyi

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BACKGROUND Some biomechanical studies have been performed to evaluate the stabilization provided by interbody cages, but there are virtually no comparative data for the different designs. Furthermore, most investigators have used animal models, which may have led to different results due to morphological variation in the end plates and articular facets. The(More)
STUDY DESIGN An in vitro biomechanical investigation on human cadaveric specimens was conducted before and after nucleotomy. Endplate and vertebral body deformation patterns were measured under compression and shear loading, in addition to kinematics and disc pressure. OBJECTIVE The working hypotheses of this study were that in compression, nucleotomy(More)
The immediate stabilization provided by anterior interbody cage fixation is often questioned. Therefore, the role of supplementary posterior fixation, particularly minimally invasive techniques such as translaminar screws, is relevant. The purpose of this biomechanical study was to determine the immediate three-dimensional flexibility of the lumbar spine,(More)
We performed an in vitro study to investigate the stabilization (i.e. motion reduction) provided by the external spinal fixator (ESF), and to compare the three configurations of the ESF with two internal fixation techniques. Six human cadaveric lumbar spine specimens (L3–S1) were subjected to multidirectional flexibility testing in six configurations: (1)(More)
We performed an in vitro study to investigate the effect of external spinal fixation on anterior column motion under physiological axial compression loading. The AO external spinal fixator (ESF) was applied to 5 human cadaveric lumbar spine specimens (L3-S1) at levels L4 to S1. All specimens were tested in 4 configurations: i) intact, ii) ESF in a neutral(More)
Multislice spiral CT-scan (MSCT) was performed on a series of 24 cases of orbital traumas. 28 orbits presented normal anatomic structure, 17 on the right side and 11 on the left side. The other 20 orbits presented traumatically modified bony architecture and were not used for this anatomical study. The examination was made on Light Speed Ultra Advantage, 8(More)
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