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  • 74.25.−q  (1)
  • ACL rupture  (1)
  • Acetabulum  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Avascular osteonecrosis of the acetabulum (1997)
    Springer
    Skeletal radiology 26 (1997), S. 509-516 
    Details
    ISSN: 1432-2161
    Schlagwort(e): Key words Avascular osteonecrosis ; Femoral head ; Acetabulum ; MRI
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract  Objective. To investigate the possible occurrence of osteonecrosis in the acetabulum in patients with non-traumatic necrosis of the femoral head. Design and patients. One hundred and seventy-nine patients with non-traumatic femoral head necrosis were assessed by MRI and radiography for the presence of acetabular necrosis. Three criteria were established to differentiate between osteonecrosis and osteoarthritic changes: (1) heterogeneous morphology and irregular contours of the lesion; (2) typical demarcation lines of osteonecrosis; (3) deficient accumulation of intravenous gadolinium in the affected regions. Results. In four patients histological confirmation of acetabular necrosis was obtained. The MR analysis of 22 acetabula (9.5% of those examined) showed changes which suggested osteonecrosis. No cystic lesions were demonstrated in the subchondral bone of any patient. Two cases of acetabular necrosis were found without an ipsilateral femoral head necrosis. In two patients of the 14 who had undergone total hip replacement following necrosis of the femoral head, aseptic loosening of the acetabular component was found. Conclusion. The study suggests that acetabular necrosis may be an accompaniment to aseptic necrosis of the femoral head. Further work is required to assess its importance in premature loosening of the acetabular element of total hip arthroplasty.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002560050277
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  • 2
    Digitale Medien
    Digitale Medien
    Long-term follow-up results of total or partial meniscectomy and untreated anterior cruciate ligament rupture (1998)
    Springer
    European journal of orthopaedic surgery & traumatology 8 (1998), S. 61-64 
    Details
    ISSN: 1432-1068
    Schlagwort(e): ACL rupture ; Arthrotomy ; Meniscectomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary A group of 94 male and 12 female patients who all suffered from ACL ruptures had a follow-up examination after a period of 14 to 21 years (m = 17.2 years). Each of them had undergone a primary arthrotomy with total or partial meniscectomy. In none of the cases, however, had operative repair of the ACL rupture been performed. The most frequent concomitant injury was a torn medial meniscus which occurred in 74.5% of the cases whereas a damaged lateral meniscus was found in 17.0% of the cases only. Chondromalacia of tibia, femur or patella was observed in 42.5% of the cases. Over 60% of the patients resumed their former sports activities, although in nearly 30% of these cases at a lower level whereas one third of the patients had to practice some other sport or were even forced to give up sports completely. 61.3% still complained about instability of the knee joint, 73.6% of the patients with partial or total meniscectomy had developed osteoarthritis of grade III and IV.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01682041
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  • 3
    Digitale Medien
    Digitale Medien
    Effect of pair fluctuations on the electronic properties of the negative Hubbard model (1995)
    Springer
    Journal of low temperature physics 99 (1995), S. 315-317 
    Details
    ISSN: 1573-7357
    Schlagwort(e): 74.20Mn ; 74.25.−q ; 74.72.−h
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Based on the fact that high-Tc superconductors exhibit strong fluctuations, we have allowed the presence of pair fluctuations in the framework of the T-matrix formalism using the 2-D negative Hubbard model for temperatures above and below Tc. Our equations are fully self-consistent. For T ≥ Tc the electronic properties change drastically with respect to BCS treatment, namely, there is a pseudogap around the chemical potential in the density of states, and the spectral function, A(k,ω), vs. ω exhibits a double peak structure which is related to the appearance of this pseudogap. For T ≤ Tc, we have generalized the formalism in order to include the order parameter.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00752300
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