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Aim of the study. Assessment by stereomicroscopy of the severity of lesions in osteoporotic bone at
both sexes and to correlate micro-and macro-bone fracture due to low bone density values with the
disease evolution.
Material and method: The study material consists of fragments of bone from the femoral head,
vertebral bone, costal and iliac crest biopsy obtained from patients aged over 70 years, female and
male, treated in the County Hospital of Timisoara, Department of Orthopedics. For the purpose of
studying the samples in stereomicroscopy and trough polarized light it has been used the Olympus
Microscope SZ ×7 and an Olympus camera with 2,5 × digital zoom and a 3× optical zoom in the
Vest Politechnic Univesity.
Results and discussions: Subchondral bone presents osteolysis associated with a osteoporotic bone
transformation. Pseudocystic chondrolisis was noted in the osteoarticular cartilage, in addition with
areas of hemorrhagic postfractural necrosis. The osteoporotic bone exhibits ischemic necrosis and
focal hemorrhagic necrosis adjacent fracture. Microporosity pattern of the bone observed by
stereomicroscopy correspond to the spongy bone osteoporosis images. Morphometry of the bone
spiculi reveals length of 154.88 and 498.32 μ. In men we found a greater thickness of bone trabeculi
compared with bone texture porosity in women. The subchondral bone supports and fulfills an
important role in transmitting forces from the overlying articular cartilage inducing the bone
resorbtion.
The femoral head fracture may be the final event of many accumulated bone microcracks.
Conclusions: Bone fragility depends not only of the spongy bone but also of the cortical bone
properties. Osteolysis produced by loss of balance in the process of remodeling in favor of bone
resorption leads to the thinning of the subchondral bone at both sexes.
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