title: [Microstructural examinations of the behavior of human cortical bone after compression osteosynthesis].
abstract: 20 samples of human cortical bone removed from the subtrochanteric region after introchanteric femoral osteotomies with subsequent fixation by a blade plate were examined for studies of the phenomenon of cancellous transformation. Previous experiments with animals can be confirmed. A dilatation of Haver's canals in the direction from endosteum peripherally becomes apparent. This quantitative loss of cortical density is associated with a loss of mineral density. Under polarisation and scanning microscopy a derangement of collagen fibrils usually arranged in an oriented fashion can be shown. The loss of mechanical properties is discussed in connection with the derangement of orientation of collagen fibrils.
mesh_terms: D000818:Animals; D001860:Bone Plates / Q000009:adverse effects; D001842:Bone and Bones / Q000648:ultrastructure*; D003094:Collagen; D005269:Femur / Q000473:pathology / Q000648:ultrastructure; D005592:Fracture Fixation / Q000009:adverse effects; D005598:Fractures, Spontaneous / Q000209:etiology; D006801:Humans; D008855:Microscopy, Electron, Scanning; D008859:Microscopy, Polarization; D011312:Pressure
chemical_list: D003094:Collagen
vernacular_title: Untersuchungen zum Verhalten der Mikrostruktur der menschlichen Corticalis nach Druckplattenosteosynthese