Worlicek, M. and Weber, M. and Zeman, F. and Woerner, M. and Schneider, M. and Grifka, J. and Renkawitz, T. and Craiovan, B. (2016) Digital Planning Software Fails to Reflect Stem Torsion on Plain Radiographs after Total Hip Arthroplasty. ROFO-FORTSCHRITTE AUF DEM GEBIET DER RONTGENSTRAHLEN UND DER BILDGEBENDEN VERFAHREN, 188 (8). pp. 763-767. ISSN 1438-9029, 1438-9010
Full text not available from this repository. (Request a copy)Abstract
Purpose: The purpose of this study was to evaluate the validity of commercially available planning software on plain radiographs after THA compared to CT scans as the gold standard. Patients and Methods: In a prospective clinical study, anteroposterior (AP) radiographs and three-dimensional CT scans (3D-CT) were obtained for 121 patients, who underwent minimally invasive, cementless THA with a straight tapered stem, in a lateral decubitus position. For measuring SV, we used digital planning software (TraumaCad 2.0, BrainLAB Feldkirchen, Germany). Two independent raters repeated the analysis after a six-week interval. Radiological measurements were compared with 3D-CT measurements by an independent, blinded external institute. This investigation was approved by the local ethics commission (no. 10 - 121-0263) and is a secondary analysis of a larger project (DRKS00 000 739, German Clinical Trials Register May-02 - 2011). Results: The radiograph measurements showed very high intra-and interrater agreement. The intra- class correlation (ICC) of the intrarater agreement was 0.97 for rater 1 and 0.98 for rater 2. The intrarater reliability was 0.99 using the mean values of both rater measurements. The mean difference between the average radiograph measurement and the 3D-CT-based measurement was 0.41 degrees (SD 11.24 degrees) (range: -33.85 degrees-22.50 degrees; 95 % limits of agreement: - 21.63 - 22.45), but there was no correlation found between both methods. Conclusion: Measuring stem version with the help of commercially available digital planning software on plain radiographs after THA has high intra- and interrater reliability but clinically inacceptable validity and reliability when compared to 3D-CT scans.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FEMORAL OFFSET; REPLACEMENT; ANTEVERSION; IMPINGEMENT; VERSION; MOTION; RANGE; hip arthroplasty; stem version; anterior posterior radiographs; planning software; CT |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Orthopädie Medicine > Zentren des Universitätsklinikums Regensburg > Zentrum für Klinische Studien |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Apr 2019 11:16 |
| Last Modified: | 05 Apr 2019 11:16 |
| URI: | https://pred.uni-regensburg.de/id/eprint/3529 |
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