Worlicek, Michael C. and Woerner, Michael L. and Craiovan, Benjamin S. and Zeman, Florian and Grifka, Joachim and Renkawitz, Tobias F. and Weber, Markus (2017) Lesser Trochanter Size on Plain Anteroposterior Radiographs Correlates With Native Femoral Anteversion. JOURNAL OF ARTHROPLASTY, 32 (9). pp. 2892-2897. ISSN 0883-5403, 1532-8406
Full text not available from this repository.Abstract
Background: Assessing femoral version in orthopedic surgery is important for preoperative planning of total hip arthroplasty, especially for recognizing excessive anteversion or retroversion. The present study addressed the following: (1) Is the position of the lesser trochanter correlated to the femoral neck axis? (2) If so, may femoral version be assessed by means of plain pelvic radiographs? Methods: Three-dimensional computed tomography scans of 60 patients undergoing minimally invasive cement- free total hip arthroplasty were retrospectively analyzed, particularly with regard to the relation between the femoral neck axis and the lesser trochanter, the femoral version, and the size of the projected lesser trochanter in different rotational positions. Based on linear regression, a biomathematical formula was developed to assess femoral anteversion on plain radiographs depending on the visible part of the lesser trochanter. Results: The mean difference between the location of the lesser trochanter axis and the femoral neck axis was 43.3 degrees +/- 6.2 degrees. Eighty-seven percent of patients (52 of 60) had a deviation of <10 degrees from the mean value of 43.3 degrees. By virtual rotation of the femur in steps of 10 degrees, the visible part of the lesser trochanter linearly increased with anteversion of the femur: femoral version = (lesser trochanter size - 5.57) x 4.17. There was a high correlation between the visible part of the lesser trochanter and femoral version (R-2 = 0.75; P <.001). The lesser trochanter was no longer visible with femoral retroversion in each of the 60 data sets. Conclusion: The projected size of the lesser trochanter as available on plain pelvic AP radiographs correlates with native femoral anteversion. (C) 2017 Elsevier Inc. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TOTAL HIP-ARTHROPLASTY; COMPUTED-TOMOGRAPHY; STEM VERSION; REPLACEMENT; IMPINGEMENT; OFFSET; femoral version; plain radiographs; CT; lesser trochanter; total hip arthroplasty; preoperative planning |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Orthopädie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:15 |
| Last Modified: | 28 Feb 2019 14:07 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1315 |
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