The lateral femoral notch sign (LNS) is a bony impression on the lateral femoral condyle correlated with anterior cruciate ligament (ACL) injury. Its presence is associated with lateral meniscus injury and higher cartilage degradation on the lateral femoral condyle.

Hypothesis/Purpose: The present study aimed to investigate the effect and magnitude of LNS on rotatory instability. The hypothesis was that a positive LNS was correlated with a high-grade pivot shift (PS).

Study design: Cross-Sectional Study; Level of evidence, 3

Methods

90 consecutive patients with complete ACL tears from 2013 to 2017 underwent intraoperative kinematic evaluation with the surgical navigation system, and were included in the present study. The same surgeon performed a standardized PS under anesthesia. The PS was quantified through the acceleration of the lateral compartment during tibial reduction (PS ACC) and the internal-external rotation (PS IE). LNS presence and depth were evaluated on sagittal MRI images (1.5 Tesla).

Results

In 47 patients, the LNS was absent. In 33, the LNS depth was between 1mm and 2mm, and in 10 patients, it was higher than 2mm. Patients with a notch deeper than 2 mm showed increase PS ACC and PS IE compared with the group without the LNS. However, no significative differences were present between the group with a notch between and 1 and 2mm and the patients without LNS.

Conclusion

The presence of a lateral LNS deeper than 2mm could be used to preoperatively identify patients with a high risk of increased rotatory instability. Clinical Relevance: The LNS could be useful in the clinical setting to set patient’s expectations and probably modify the surgical planning in terms of graft choice and additional lateral extra-articular procedures.

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Quadriceps Tendon Vs. Hamstring Tendon Autograft In Primary Anterior Cruciate Ligament Reconstruction: A Matched-Pairs Study With A Mean Follow-Up Of 6.5 Years Award Winner 5 minutes Armin Runer, PD MD, GERMANY Aline Suter, MD, AUSTRIA Tommaso Roberti di Sarsina, MD, ITALY Caroline Hepperger, PhD, AUSTRIA Peter Gföller, MD, AUSTRIA Christian Hoser, MD, AUSTRIA Robert Csapo, PhD, AUSTRIA Christian Fink, MD, Prof., AUSTRIA
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Early Return To Sport After Quadriceps Tendon Autograft ACL Reconstruction: Comparison To Bone-Patellar Tendon-Bone Autograft At A Minimum 1-Year Follow-Up ePoster Presentation Evan W. James, MD, UNITED STATES Dakota Adamec , BS , UNITED STATES Spencer Sullivan, BS, UNITED STATES Per-Henrik Randsborg, MD, PhD, NORWAY Brandon Schneider, MS, UNITED STATES Robert G. Marx, MD, UNITED STATES Answorth A. Allen, MD, UNITED STATES Frank A. Cordasco, MD, MS, UNITED STATES Benedict U. Nwachukwu, MD, MBA, UNITED STATES Danyal H. Nawabi, MD, FRCS(Orth), UNITED STATES
Posterior Tibial Plateau Impaction Fractures Are Not Associated With Increased Knee Instability: A Quantitative Pivot Shift Analysis Abstract Presentation 8 minutes Brian M Godshaw, MD, UNITED STATES Joshua C Setliff, BA, UNITED STATES Jonathan D Hughes, MD, PhD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES
Sex Related Outcomes Following Anterior Cruciate Ligament Reconstruction (Aclr): A Systematic Review and Meta-Analysis Abstract Presentation 5 minutes Anthony Charles Mok, BS, UNITED STATES Andrew J Fancher, BS, UNITED STATES Matthew L Vopat, MD, UNITED STATES Jordan Charles Baker, BS, UNITED STATES Armin Tarakemeh, BS, UNITED STATES Mary K. Mulcahey, MD, UNITED STATES Scott Mullen, MD, UNITED STATES Paul Schroeppel, MD, UNITED STATES Kimberly J. Templeton, MD, UNITED STATES Bryan Vopat, UNITED STATES
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Risk Factors for Grade 3 Pivot Shift in Acute ACL-Injured Knees Abstract Presentation 5 minutes Adnan Saithna, MD, FRCS, UNITED STATES Edoardo Monaco, MD, ITALY Edoardo Gaj, MD, ITALY Valerio Andreozzi, ITALY Alessandro Annibaldi, MD, ITALY Alessandro Carrozzo, MD, ITALY Thais Dutra Vieira, MD, FRANCE Bertrand Sonnery-Cottet, MD, PhD, FRANCE Andrea Ferretti, Prof., ITALY
Acl Deficiency Influences Medio-Lateral Tibial Alignment And Knee Varus–Valgus During In Vivo Activities Abstract Presentation 3 minutes Piero Agostinone, MD, ITALY Stefano Di Paolo, Eng, PhD, ITALY Alberto Grassi, PhD, ITALY Marco Bontempi, PhD, ITALY Erika Pinelli, MsC, ITALY Laura Bragonzoni, Prof., ITALY Stefano Zaffagnini, MD, Prof., ITALY
Inter- and Intra-Rater Reliability of Measurenebt of ACL TUnnels with Radiographs, CT, and MRI Abstract Presentation 4 minutes Robert A Magnussen, MD, MPH, UNITED STATES Alexander Sparks, BS, UNITED STATES Jacy Leon, BS, UNITED STATES Matthew Colatruglio, BS, UNITED STATES Joshua Bowler, MD James Oosten, BS, UNITED STATES Alex C. Dibartola, MD, MPH, UNITED STATES Joshua Scott Everhart, MD, MPH, UNITED STATES Robert A. Duerr, MD, UNITED STATES Christopher C. Kaeding, MD, UNITED STATES David C. Flanigan, MD, UNITED STATES
Higher Return To Pre-Injury Activity Levels Following ACL Reconstruction With Bone-Patellar Tendon-Bone Versus Hamstring Tendon Autograft In High Activity Patients: Results From The New Zealand ACL Registry Abstract Presentation 6 minutes Simon W. Young, MD, FRACS, NEW ZEALAND Richard Rahardja, MBChB, BMedSc(Hons), NEW ZEALAND Mark G. Clatworthy, FRACS, NEW ZEALAND Paul Monk, DPhil (Oxon), FRCS, NEW ZEALAND Hamish Love, FRACS, NEW ZEALAND
Does In Vivo Kinematics Following Acl Reconstruction With Or Without Lateral Extraarticular Tenodesis Correlate With Preoperative Quantitative Pivot Shift? Abstract Presentation 5 minutes Christopher M. Gibbs, MD, UNITED STATES Philipp Wilhelm Winkler, MD, Assoc. Prof., AUSTRIA Jonathan D Hughes, MD, PhD, UNITED STATES Adam J. Popchak, DPT, PhD, UNITED STATES Daisuke Chiba, MD, PhD, JAPAN Bryson P. Lesniak, MD, UNITED STATES William Anderst, PhD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES
The Outcome Of Non-circular (Rectangle, Oval) Femoral Tunnel ACL Reconstruction, Does It Improve The Outcome Of ACL Reconstruction Surgery? Abstract Presentation 6 minutes S. Ali Ghasemi, MD, UNITED STATES Joseph McCahon, DO, UNITED STATES Arthur R Bartolozzi, MD, UNITED STATES
Second-Look Arthroscopic Evaluation And Clinical Outcomes After Anatomical Double-Bundle Anterior Cruciate Ligament Reconstruction With Generalized Joint Laxity Or Hyperextended Knee Abstract Presentation 6 minutes Yasunari Oniki, MD, PhD, JAPAN Taiki Murakami, JAPAN Eiichi Nakamura, MD, PhD, JAPAN

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The Lateral Femoral Notch Sign Entails Increased Rotatory Laxity After Acl-Injury. Pivot Shift Quantification With Surgical Navigation System

The Lateral Femoral Notch Sign Entails Increased Rotatory Laxity After Acl-Injury. Pivot Shift Quantification With Surgical Navigation System

Background

Methods

Results

Conclusion

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The Lateral Femoral Notch Sign Entails Increased Rotatory Laxity After Acl-Injury. Pivot Shift Quantification With Surgical Navigation System

The Lateral Femoral Notch Sign Entails Increased Rotatory Laxity After Acl-Injury. Pivot Shift Quantification With Surgical Navigation System

Background

Methods

Results

Conclusion

More ISAKOS 2021: Global Content