Association of the presence of bone bars on radiographs and low bone mineral density
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Bone bars (BB) are struts of normal trabecular bone that cross the medullary portions of the metaphysis and diaphysis at right angles to the long axis of the shaft. The purpose of this investigation was to determine whether the presence of bone bars (BB) identified on radiographs of the proximal femurs and tibia, predict lower bone mineral density (BMD) as evaluated with dual-energy x-ray absorptiometry (DXA) in the lumbar spine, total hip, or femoral neck.
Materials and methods
A total of 134 sequential DXA patients underwent radiography of the pelvis, hips, and both knees. The radiographs were evaluated for the presence of BB by two musculoskeletal radiologists who were blinded to DXA results. A t test was used to evaluate the relationship of BB to BMD and a Chi-square test was used to determine if BB were equally distributed among the categories of normal BMD, low bone mass (osteopenia), and osteoporosis.
BB were associated with lower BMD at all measured sites. BB at the intertrochanteric and proximal tibial sites were the most predictive of low BMD while supraacetabular and distal femur BB were less predictive. Osteoporosis or osteopenia is seen in 60–91% of those with BB depending on the side and reader. It is only seen in about 40% of those without BB.
We conclude that the presence of BB suggest decreased BMD and when correlated with other clinical information, might support further evaluation of BMD.
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- Association of the presence of bone bars on radiographs and low bone mineral density
Volume 40, Issue 7 , pp 905-911
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- Bone bars
- Dual-energy x-ray absorptiometry
- Bone mineral density
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- 1. Department of Radiology, School of Medicine, University of Alabama at Birmingham, JT N304, 625 19th Street South, Birmingham, Al, 35249-6830, UK
- 8. Department of Radiology, School of Medicine, University of Alabama at Birmingham, JT N304, 625 19th Street South, Birmingham, Al, 35294-xxx, UK
- 2. Departments of Nutrition Sciences and Medicine, Schools of Health Professions, Medicine, and Dentistry, 354 LRC, 1714 9th Avenue South, Birmingham, Al, 35294-1270, UK
- 3. Department of Radiology, School of Medicine, University of Alabama at Birmingham, JT N364, 625 19th Street South, Birmingham, Al, 35249-6380, UK
- 4. University of Alabama, 3689 Vestcreek Cove, Birmingham, Al, 35243, UK
- 5. The UAB Osteoporosis Prevention and Treatment Clinic, 3B08, 2006 6th Avenue South, Birmingham, Al, 35233, UK
- 6. The UAB Osteoporosis Prevention and Treatment Clinic, 3B09 2000 6th Avenue South, Birmingham, Al, 35233, UK
- 7. Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, 343B Ryals Public Health Building, 1665 University Boulevard, Birmingham, AL, 35294-0022, UK