Sendtner, Ernst and Tibor, Schuster and Winkler, Roman and Woerner, Michael and Grifka, Joachim and Renkawitz, Tobias (2010) Stem torsion in total hip replacement. ACTA ORTHOPAEDICA, 81 (5). pp. 579-582. ISSN 1745-3674,
Full text not available from this repository. (Request a copy)Abstract
Methods 60 patients requiring total hip arthroplasty were prospectively enrolled in this study. Minimally invasive THR was performed (anterior approach) in a lateral decubitus position and each patient underwent a postoperative CT examination. The position of the stem was evaluated by an independent external institution. Results Stem torsion ranged from -19 degrees retrotorsion to 33 degrees antetorsion. Normal antetorsion (i.e 10-15 degrees according to Tonnis) was present in 5 of 60 patients, so the prevalence of abnormal stem antetorsion was 92% (95% CI: 82-97). We found a stem antetorsion outside the range of 0-25 degrees in 21 of 60 hips. Women had a higher mean stem antetorsion (8.0 degrees (SD 11)) than men (1.5 degrees (SD 10)). Interpretation Postoperative stem antetorsion shows a high variability and is gender-related. We suggest precise assessment of stem antetorsion intraoperatively by means of computer navigation, preparing the femur first. In abnormal stem antetorsion, the cup position can be adjusted using a combined anteversion concept; alternatively, modular femoral components or stems with retroverted or anteverted necks ("retrostem") could be used.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FEMORAL ANTEVERSION; OSTEOARTHRITIS; ARTHROPLASTY; ACETABULUM; ACCURACY; FEMUR; |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Unfallchirurgie Medicine > Lehrstuhl für Orthopädie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Jul 2020 09:04 |
| Last Modified: | 08 Jul 2020 09:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/24026 |
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