A More Reliable Method to Assess Acetabular Component Position
| Autor: | John V, Tiberi, Nicholas, Pulos, Michael, Kertzner, Thomas P, Schmalzried, Thomas P, Schmlazried |
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| Rok vydání: | 2012 |
| Předmět: |
Male
musculoskeletal diseases medicine.medical_specialty Time Factors Bearing wear Arthroplasty Replacement Hip medicine.medical_treatment Prosthesis Design Software Ischium Predictive Value of Tests Position (vector) Image Interpretation Computer-Assisted medicine Humans Orthopedics and Sports Medicine Symposium: Papers Presented at the Annual Meetings of The Hip Society Reliability (statistics) Observer Variation business.industry Reproducibility of Results Acetabulum General Medicine Reference Standards equipment and supplies musculoskeletal system Los Angeles Arthroplasty Reliability engineering Surgery Treatment Outcome Tomography x ray computed Acetabular component Linear Models Female Hip Joint Hip Prosthesis Anatomic Landmarks Tomography X-Ray Computed business |
| Zdroj: | Clinical Orthopaedics & Related Research. 470:471-476 |
| ISSN: | 0009-921X |
| DOI: | 10.1007/s11999-011-2006-8 |
| Popis: | Acetabular component position is associated with joint function and bearing wear. Current techniques for determining acetabular component version on standard radiographs lack reliability. Other, more consistent techniques are time-consuming and require additional equipment or software.We compared three methods of acetabular component position assessment: (1) Einzel-Bild-Roentgen-Analyse (EBRA), (2) Woo and Morrey, and (3) the new ischiolateral method.We assessed axial component position for 52 hips, with at least three radiographic series, using EBRA, and on true lateral radiographs using the Woo and Morrey method and a new method that uses the ischium as a skeletal landmark, the ischiolateral method.The mean SDs of the ischiolateral (2.15°) and EBRA (2.06°) methods were lower than that of the Woo and Morrey method (3.65°) but were not different from one another. We observed a SD of greater than 4° in 19 (36.5%) hip series using the Woo and Morrey method, compared to six series (11.5%) for both the ischiolateral and EBRA methods. Twenty-four (12.6%) Woo and Morrey measurements were greater than 4° from the mean for the hip series, compared to seven (3.8%) for ischiolateral and nine (4.7%) for EBRA. The intraclass correlation coefficients for intra- and interobserver reliability for the ischiolateral method and EBRA were the same (0.9).Referencing the ischium standardizes pelvic position on each lateral radiograph and provides a simple and reliable means to assess axial component position, which is a surrogate for the planar anteversion measured by EBRA. |
| Databáze: | OpenAIRE |
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