Effect of rotation on periprosthetic bone mineral measurements in a hip phantom
| Autor: | Bobyn Jd, Mortimer Es, Rosenthall L, Paterson I |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Bone mineral
medicine.medical_specialty Rotation business.industry Phantoms Imaging medicine.medical_treatment Periprosthetic General Medicine Anatomy Prosthesis Imaging phantom Bone remodeling Absorptiometry Photon Bone Density Orthopedic surgery Medicine Humans Orthopedics and Sports Medicine Surgery Femur Hip Prosthesis business Biomedical engineering |
| Zdroj: | Clinical orthopaedics and related research. (324) |
| ISSN: | 0009-921X |
| Popis: | The effect of rotation on the measurement of periprosthetic bone mineral content and bone mineral density using dual energy xray absorptiometry was studied in 9 anatomic specimen femora implanted with noncemented titanium hip prostheses. An apparatus was constructed to permit accurate femoral rotation through an arc of 30 degrees internal to 30 degrees external rotation in 5 degrees increments. Two scans were obtained at each increment of rotation for a total of 26 scans for each implanted femur. Change in bone mineral content and bone mineral density was measured for each of 7 contiguous periimplant regions (Gruen zones). The precision of the paired bone mineral density measurements was 1.7%. In all Gruen zones, the means of bone mineral content and bone mineral density measurements varied within 5% between 15 degrees internal and 15 degrees external rotation. Variation in limb rotation, as might occur with temporal studies of periimplant bone remodeling, can be tolerated within easily controllable limits without excessive error in bone mineral measurements. |
| Databáze: | OpenAIRE |
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