[Mechanical changes in bone after roentgen irradiation with low dosage].
We investigated the micromechanical properties using doses from 1 up to 7 Gray and could observe a roughening on the surface of the bone material in the microscopic range by scanning acoustic microscopic measurements. In addition, a preceding irradiation promoted an extension of microcracks during the polishing process indicating an embrittlement. After irradiation and removal of the surface layer, the SAM measurements indicate a preferential increasing of hardness of softer regions. These results are consistent with our measurements by environmental scanning electron microscopy.
Eckardt
I
I
A.G. Biomechanik & Strukturforschung, Klinik und Poliklinik für Orthopädie, Martin-Luther-Universität Halle-Wittenberg.
Henning
S
S
Syrowatka
F
F
Gerlach
R
R
Hein
H J
HJ
D000368:Aged; D004307:Dose-Response Relationship, Radiation; D005269:Femur / Q000473:pathology / Q000528:radiation effects; D006244:Hardness; D006801:Humans; D008297:Male; D008855:Microscopy, Electron, Scanning; D010025:Osteoradionecrosis / Q000473:pathology*; D013499:Surface Properties; D014965:X-Rays / Q000009:adverse effects*