Evaluation of a novel method to calculate cementless femoral stem level on craniocaudal projection radiographs
© 2021 American College of Veterinary Surgeons..
OBJECTIVE: To assess the accuracy of a proportion-corrected radiographic cementless femoral stem level calculation in a cadaver model.
STUDY DESIGN: Cadaveric study.
SAMPLE POPULATION: Twelve cadaveric canine femurs.
METHODS: Cementless femoral stems were implanted in 12 cadaver femurs at three stem levels. Craniocaudal projection radiographs of the implanted femurs were obtained at 0°, 10°, 20°, 30°, and 45° angulations in the sagittal plane (relative to the radiographic plate) and at 0°, 15°, and 30° internal and external axial rotation. A proportional calculation including actual stem length, radiographically measured stem length, and radiographically measured stem level relative to the greater trochanter (uncorrected stem level) was solved to yield a corrected stem level. The errors of the stem level measurements were compared.
RESULTS: With 0° or 15° of internal rotation, the true stem level differed by more than 0.5 mm from corrected stem level in 2 of 30 tested femoral positions. It differed from the uncorrected stem level in 10 of 30 positions. With 15° and 30° external rotation or 30° internal rotation, the corrected stem level was not more accurate than the uncorrected stem level for any femoral position.
CONCLUSION: Use of a proportion correction minimized variability in the stem-level measurements due to sagittal angulation (up to 30°) of the femur at 0° or 15° of internal rotation.
CLINICAL SIGNIFICANCE: A proportion correction can improve the accuracy of femoral stem-level assessment on craniocaudal projection radiographs, which may aid in the detection of subsidence after cementless total hip replacement.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:50 |
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| Enthalten in: |
Veterinary surgery : VS - 50(2021), 8 vom: 20. Nov., Seite 1592-1599 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Brand, Kenneth J [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 25.11.2021 Date Revised 25.11.2021 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1111/vsu.13723 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM330874292 |
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| 245 | 1 | 0 | |a Evaluation of a novel method to calculate cementless femoral stem level on craniocaudal projection radiographs |
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| 500 | |a Date Completed 25.11.2021 | ||
| 500 | |a Date Revised 25.11.2021 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a © 2021 American College of Veterinary Surgeons. | ||
| 520 | |a OBJECTIVE: To assess the accuracy of a proportion-corrected radiographic cementless femoral stem level calculation in a cadaver model | ||
| 520 | |a STUDY DESIGN: Cadaveric study | ||
| 520 | |a SAMPLE POPULATION: Twelve cadaveric canine femurs | ||
| 520 | |a METHODS: Cementless femoral stems were implanted in 12 cadaver femurs at three stem levels. Craniocaudal projection radiographs of the implanted femurs were obtained at 0°, 10°, 20°, 30°, and 45° angulations in the sagittal plane (relative to the radiographic plate) and at 0°, 15°, and 30° internal and external axial rotation. A proportional calculation including actual stem length, radiographically measured stem length, and radiographically measured stem level relative to the greater trochanter (uncorrected stem level) was solved to yield a corrected stem level. The errors of the stem level measurements were compared | ||
| 520 | |a RESULTS: With 0° or 15° of internal rotation, the true stem level differed by more than 0.5 mm from corrected stem level in 2 of 30 tested femoral positions. It differed from the uncorrected stem level in 10 of 30 positions. With 15° and 30° external rotation or 30° internal rotation, the corrected stem level was not more accurate than the uncorrected stem level for any femoral position | ||
| 520 | |a CONCLUSION: Use of a proportion correction minimized variability in the stem-level measurements due to sagittal angulation (up to 30°) of the femur at 0° or 15° of internal rotation | ||
| 520 | |a CLINICAL SIGNIFICANCE: A proportion correction can improve the accuracy of femoral stem-level assessment on craniocaudal projection radiographs, which may aid in the detection of subsidence after cementless total hip replacement | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Beale, Brian S |e verfasserin |4 aut | |
| 700 | 1 | |a Hudson, Caleb C |e verfasserin |4 aut | |
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