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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Analysis Of The Blood Supply To The Femoral Attachment Of The Anterior Cruciate Ligament After Acl Injury Abstract Presentation 4 minutes Jedrzej Jerzy Lesman, PhD MD, POLAND Marcin E. Domzalski, MD, Prof., POLAND Krzysztof Nowak, MD, PhD, POLAND Sebastian Zygmunt Żabierek, PhD, POLAND Radoslaw Grabowski, MD, POLAND Ilona Wagner-Olszewska, MD, POLAND
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Effect Of Graft Choice On 6-Year Outcomes Of Revision Anterior Cruciate Ligament Reconstruction In The Multicenter ACL Revision Study (Mars) Cohort Abstract Presentation 6 minutes Rick W. Wright, MD, UNITED STATES
Acl - Pcl Fixation Sequence During Multi-Ligament Knee Reconstruction Does Not Affect Knee Laxity Abstract Presentation 6 minutes Carola F. van Eck, MD, PhD, FAAOS, UNITED STATES Aly Maher Fayed, MD, EGYPT Ryo Kanto, MD, JAPAN Taylor M. Price, MS, UNITED STATES Michael Dinenna, BS, UNITED STATES Monica A. Linde, MSIE, RN, UNITED STATES Patrick J. Smolinski, PhD, UNITED STATES
Early ROM exercise after ACLR with hamstring autograft does not cause joint laxity : A Prospective Randomized Controlled Trial, 2 years follow up ePoster Presentation Jeong-Ku Ha, MD, phD, Prof, KOREA, REPUBLIC OF Kyu Sung Chung, MD, PhD, Prof., KOREA, REPUBLIC OF
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
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Predicting Subjective Failure of ACL Reconstruction: A Machine Learning Analysis of the Norwegian Knee Ligament Register and Patient Reported Outcomes Award Winner 5 minutes R. Kyle Martin, MD, FRCSC, UNITED STATES Solvejg Wastvedt, BA, UNITED STATES Ayoosh Pareek, MD, UNITED STATES Andreas Persson, MD, PhD, NORWAY Havard Visnes, MD, PT, PhD, NORWAY Anne Marie Fenstad, MSc, NORWAY Gilbert Moatshe, MD, PhD, NORWAY Julian Wolfson, PhD, UNITED STATES Lars Engebretsen, MD, PhD, NORWAY
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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
Factors associated with anterior cruciate ligament (ACL) reconstruction among ACL injuries in Alberta, Canada ePoster Presentation Yuba Raj Paudel, MPH, CANADA Mark F. Sommerfeldt, MD, CANADA Donald C. Voaklander, PhD, CANADA
PSM: Pivot Shift Meter Cellphone Application for Classifying ACL Injuries Abstract Presentation 5 minutes Edmundo Berumen Nafarrate, PhD, Prof., MEXICO Carlos Alejandro Vega Najera, MD, MEXICO Joel Alejandro Cabral, MD, MEXICO Luis Sigala Gonzalez, Eng, MEXICO Ivan Ramos Moctezuma, Eng, MEXICO Carlos Leal, MD, Prof., COLOMBIA Jesus Javier Tonche, MD, MEXICO Avril Pérez Fontes, MD, MEXICO Fatima Quintana Trejo, Eng, MEXICO
Increased Osteoarthritis And Knee Instability Following Postoperative Septic Knee Arthritis After Anterior Cruciate Ligament Reconstruction with a Minimum 8 Year Follow-Up ePoster Presentation Thomas R. Pfeiffer, Prof., GERMANY Julius Stüber, cand. med., GERMANY Jan-Hendrik Naendrup, BS, MD, GERMANY Daniel Guenther, MD, Prof., FACS, MHBA, GERMANY Robin Otchwemah, MD, GERMANY Sven T. Shafizadeh, Prof. Dr. , GERMANY Paola Kappel, MD, GERMANY Arasch Wafaisade, PD, GERMANY Sebastian Imach, MD, MBA, GERMANY
Lower Socioeconomic Status Adversely Affects Access To Care And The Rate Of Instability Events And Bucket Handle Meniscus Tears Following Anterior Cruciate Ligament Tears Abstract Presentation 6 minutes Edward S. Chang, MD, UNITED STATES Blake M. Bodendorfer, MD, UNITED STATES Andrew Curley, MD, UNITED STATES David X. Wang, MD, UNITED STATES Christine Conroy, MD, UNITED STATES Mark Hopkins, MD, UNITED STATES Brian McCormick, MD, UNITED STATES Caroline Fryar, MD, UNITED STATES
Comparative Study Of “Concomitant Patellar Tendon Rupture With Anterior cruciate ligament tear and Patellar Tendon Rupture With Multi- Ligamentous Knee Injury –MLKI” Abstract Presentation 6 minutes Silvampatti Ramasamy Sundararajan, MS(Orth), INDIA Rajagopalakrishnan Ramakanth, D.ortho, DNB(ortho), D.SICOT, INDIA S Rajasekaran, MS(Orth),DOrth,DNB,FRCS(Ed),FRCS(Lon),MCh(Liv),PhD, INDIA

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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