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  • Key words Disko-ligamentous-lesions • Lumbar instability • Dynamic and static stabilisation • Spinal biomechanics  (1)
  • Operative decompression  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Static and dynamic stabilisation methods of the spine following rupture of the anterior and posterior ligament complexes (1998)
    Springer
    Der Unfallchirurg 101 (1998), S. 684-690 
    Details
    ISSN: 1433-044X
    Keywords: Key words Disko-ligamentous-lesions • Lumbar instability • Dynamic and static stabilisation • Spinal biomechanics ; Schlüsselwörter Diskoligamentäre Läsionen • Lumbale Instabilität • Statische und dynamische Stabilisierung • Biomechanik
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Läsionen des dorsoventralen Ligamentkomplexes führen zu einer Instabilität des lumbalen Bewegungssegments. Prognostisch stellen diskoligamentäre Verletzungen infolge der bleibenden Narbenbildung ein größeres Problem dar als der ossäre Stabilitätsverlust mit rascher Heilungstendenz. Mit der vorliegenden biomechanischen In-vitro-Studie wurden verschiedene Instabilitätsgrade in der Korrelation zum Ausmaß diskoligamentärer Defekte nachgewiesen. Durch eine transpedikuläre Stabilisierung mit einem Schrauben-Ringband-System wurde bei segmentalem Funktionserhalt die Instabilität aufgehoben. Mit einem rigiden Schrauben-Stab-System verblieb eine geringe Restbeweglichkeit, infolge der Biegebeanspruchung kann ohne Spondylodese ein Implantatversagen resultieren.
    Notes: Summary Defects of the dorsal and ventral ligament complexes of the lumbar spine results to an instability of the functional spinal unit. For the prognosis of secondary instability due to disko-ligamentous injuries the functional insufficiency of the lasting scars is a larger problem than the primar loss of osseous stability with fast healing tendency. The main goal of the present biomechanical study in vitro was to demonstrate the different grades of instability in the correlation to progressive disko-ligamentous defects as well as stabilisation through dynamic and static procedures. With a transpedicular screw-ringband-system the segmental function was preserved and instability was abolished. After rigid instrumentation with a fixateur intern remained a residual range of motion due to which can result refuse to bending moments without spondylodesis in an implant failure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001130050323
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Laminectomy and functional impairment of the lumbar spine: the importance of muscle forces in flexible and rigid instrumented stabilization – a biomechanical study in vitro (1998)
    Springer
    European spine journal 7 (1998), S. 229-238 
    Details
    ISSN: 1432-0932
    Keywords: Key words Spinal biomechanics ; Intersegmental muscle forces ; Operative decompression ; Instrumented stabilization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Laminectomy is the accepted treatment for spinal canal stenosis in cases where conservative treatment has failed. Opinions diverge on the resulting clinical instability and the necessity of instrumented stabilization. The present biomechanical study was performed to determine the functional impairment following laminectomy and the stabilizing effect of flexible and rigid devices. This was the first time that the effects of agonist and antagonist intersegmental lumbar muscle forces acting on intact, unstable and instrumentally stabilized functional spinal units have been investigated. Six human cadaveric lumbar spines were tested in a spine tester. The coactivation of agonist and antagonist muscle forces resulted in increased stability under the load conditions of bending and rotation; a slight increase in the range of motion was noted during flexion. The functional impairment following laminectomy was corrected by ligamentoplasty and by means of muscle forces. Ligamentoplasty appears to be an alternative to decompression with spondylodesis, especially in patients with well-developed muscles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005860050062
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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