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  • 1 Department of Traumatology, Faculty of Medicine, University of Pécs, Szigeti str. 12, 7624, Pecs, Hungary
  • | 2 Department of Biophysics, Faculty of Medicine, Institute of Biophysics, University of Pécs, Szigeti str. 12, 7624, Pecs, Hungary
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Abstract

The femoral neck fracture continues to be unsolved fractures and the guidelines for management are still evolving. The primary complications arising from femoral neck fractures are non-union and avascular necrosis. The various methods currently available for predicting the vascularity of the head at the time of fracture are not sufficiently quantitative to be used on a routine clinical basis. The hypothesis was that after the femoral neck fracture there are clear pathological abnormalities in the cartilage of the femoral head, which could be monitored besides the classical methods by differential scanning calorimetry. The thermal denaturation of human samples was monitored by a SETARAM Micro DSC-II calorimeter. All the experiments were performed between 0 and 100 °C. The heating rate was 0.3 K/min. DSC scans clearly demonstrated significant differences between the control and different stages avascular samples (control, fresh fractures: Tm = 68.2 °C, ΔHcal = 2.87 J/g, avascular necrosis: Tm = 70.7 °C, ΔHcal = 3.61 J/g,). These observations could be explained with the structural alterations caused by the biochemical processes during the degeneration of the cartilage due to avascular femoral head necrosis. With the investigations the authors could demonstrate that DSC is a useful and well-applicable method for the investigation of hyaline cartilage of the fractured human femoral head. It was confirmed significances between the changes of calorimetric results and the elapsed time from the primary femoral neck fracture.

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