caa a22 4500 60545759X CHVBK 20210128100224.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s00167-014-3181-4 doi (NATIONALLICENCE)springer-10.1007/s00167-014-3181-4 Does flexible tunnel drilling affect the femoral tunnel angle measurement after anterior cruciate ligament reconstruction? [Elektronische Daten] [Bart Muller, Marcus Hofbauer, Akere Atte, C. van Dijk, Freddie Fu] Purpose: To quantify the mean difference in femoral tunnel angle (FTA) as measured on knee radiographs between rigid and flexible tunnel drilling after anatomic anterior cruciate ligament (ACL) reconstruction. Methods: Fifty consecutive patients that underwent primary anatomic ACL reconstruction with a single femoral tunnel drilled with a flexible reamer were included in this study. The control group was comprised of 50 patients all of who underwent primary anatomic ACL reconstruction with a single femoral tunnel drilled with a rigid reamer. All femoral tunnels were drilled through a medial portal to ensure anatomic tunnel placement. The FTA was determined from post-operative anterior-to-posterior (AP) radiographs by two independent observers. A 5° difference between the two mean FTA was considered clinically significant. Results: The average FTA, when drilled with a rigid reamer, was 42.0°±7.2°. Drilling with a flexible reamer resulted in a mean FTA of 44.7°±7.0°. The mean difference of 2.7° was not statistically significant. The intraclass correlation coefficient for inter-tester reliability was 0.895. Conclusions: The FTA can be reliably determined from post-operative AP radiographs and provides a useful and reproducible metric for characterizing femoral tunnel position after both rigid and flexible femoral tunnel drilling. This has implications for post-operative evaluation and preoperative treatment planning for ACL revision surgery. Level of evidence: IV. Springer-Verlag Berlin Heidelberg, 2014 Femoral tunnel angle (FTA) nationallicence Anterior cruciate ligament (ACL) nationallicence Anterior cruciate ligament reconstruction nationallicence Flexible tunnel drilling nationallicence Muller Bart Department of Orthopaedic Surgery, Academic Medical Center, University of Amsterdam, P.O. Box 22660, 1100 DD, Amsterdam, The Netherlands aut Hofbauer Marcus Universitätsklinik für Unfallchirurgie, Medical University of Vienna, Vienna, Austria aut Atte Akere Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA, USA aut van Dijk C. Department of Orthopaedic Surgery, Academic Medical Center, University of Amsterdam, P.O. Box 22660, 1100 DD, Amsterdam, The Netherlands aut Fu Freddie Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA, USA aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/12(2015-12-01), 3482-3486 0942-2056 23:12<3482 2015 23 167 https://doi.org/10.1007/s00167-014-3181-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-014-3181-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Muller Bart Department of Orthopaedic Surgery, Academic Medical Center, University of Amsterdam, P.O. Box 22660, 1100 DD, Amsterdam, The Netherlands aut NATIONALLICENCE 700 1- Hofbauer Marcus Universitätsklinik für Unfallchirurgie, Medical University of Vienna, Vienna, Austria aut NATIONALLICENCE 700 1- Atte Akere Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA, USA aut NATIONALLICENCE 700 1- van Dijk C. Department of Orthopaedic Surgery, Academic Medical Center, University of Amsterdam, P.O. Box 22660, 1100 DD, Amsterdam, The Netherlands aut NATIONALLICENCE 700 1- Fu Freddie Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA, USA aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/12(2015-12-01), 3482-3486 0942-2056 23:12<3482 2015 23 167