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  • 11
    Electronic Resource
    Electronic Resource
    263. Problematik instabiler pertrochanterer Frakturen (1979)
    Springer
    Langenbeck's archives of surgery 349 (1979), S. 593-593 
    Details
    ISSN: 1435-2451
    Keywords: Unstable intertrochanteric femoral fractures ; Problems ; Consequences ; Instabile pertrochantere Brüche ; Problematik ; Konsequenzen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Osteosynthesematerial ist bei instabilen pertrochanteren Frakturen greiser Patienten unter Sofortbelastung hohen varisierenden Biegebeanspruchungen ausgesetzt. Mechanisches Versagen der Osteosynthese ist daher häufig (in einem Drittel der Fälle unseres Krankengutes). Die Fehleranalyse zeigt, daß schädliche Biegekräfte nur durch statisch-biomechanisch sinnvolle Reposition mit überkorrigierender Valgisation und Medialisation gemindert werden. Anatomisch exakte Reposition und stabile Fixation allein garantieren keine Sofortbelastbarkeit.
    Notes: Summary In case of unstable intertrochanteric femoral fractures of elderly men osteosynthetic material is exposed to high bending forces during locomotion. Mechanical failure is quite frequent. The analysis of our ] cases with failure of internal fixation revealed that harmful bending forces are dimished only by suitable reduction with valgus fixation and medial displacement according to static-biomechanical principles. Immediate stability however is not achieved by internal fixation of the fragments in an anatomical position.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01729723
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  • 12
    Electronic Resource
    Electronic Resource
    Features of direct cluster stripping in primary fragments from quasielastic20Ne-induced reactions (1984)
    Springer
    The European physical journal 319 (1984), S. 143-148 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The primary yield distribution of projectile-like fragments from the20Ne+197Au reaction has been reconstructed and was found to be similar when the bombarding energy is increased from 150 to 290 MeV. Alternative to theQ gg-systematics where the relative yields are ruled by exit channel properties, the Friedman model for projectile-fragmentation is successfully applied to the data. It relates the fragment yields essentially to the separation energyQ F of the clusters removed from the projectile (and transferred to the target) i.e. to entrance channel properties and was successful in describing the relative yields at very high bombarding energy (2 GeV/N). For a good reproduction of the relative yields at the bombarding energy and the heavy target of this experiment it is necessary to make a correction for neutron pick-up which accompanies the cluster stripping process with a certain probability. The predicted momentum widths of the fragment spectra, too, are consistent with the data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415626
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    Paper (German National Licenses)
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