Summary: This machine learning analysis of a national knee ligament register can predict a patient’s risk of primary ACL reconstruction failure (defined as a subsequent revision surgery). The resulting algorithm supports the creation of an easy-to-use calculator for point-of-care risk stratification which can be used to guide surgical discussions with patients and quantify their specific risk of failure.

Background

Several factors are associated with an increased risk of anterior cruciate ligament (ACL) reconstruction failure. However, due to the multiple patient, surgical, and rehabilitation factors that influence outcome, the ability to accurately translate these factors into a quantifiable risk of failure at a patient-specific level has remained elusive. Our hypothesis was that machine learning analysis of existing large national knee ligament registers has the potential to improve our predictive capability. The purpose of this study was to determine if machine learning analysis of primary ACL reconstructions in the Norwegian Knee Ligament Register (NKLR) can: (1) identify the most important risk factors associated with undergoing a subsequent revision ACL reconstruction, and (2) develop a clinically meaningful calculator for predicting the risk of requiring a revision operation.

Methods

Machine learning analysis was performed on the NKLR dataset. The primary outcome was probability of revision ACL reconstruction within 1, 2, and/or 5 years. Data was split randomly into training (75%) and test (25%) sets. Four machine learning models were tested: Cox Lasso, survival random forest, generalized additive model, and gradient boosted regression. Concordance and calibration were calculated for all four models.

Results

The dataset included 24,935 patients, and 4.9% underwent revision surgery during an average follow-up of 8.1 years (SD 4.1). All four models were well-calibrated, with moderate concordance (0.67-0.69). The Cox Lasso model required only five variables for outcome prediction: graft choice, femoral fixation device, KOOS QOL score at surgery, years from injury to surgery, and age at surgery. The other models either used more variables without an appreciable improvement in accuracy or had slightly lower accuracy overall. An in-clinic calculator was developed which can estimate the risk of graft failure (https://swastvedt.shinyapps.io/calculator_rev/). Whereas the overall risk of revision in the registry was 4.9%, this calculator can quantify risk at a patient-specific level.

Conclusions

Machine learning analysis of a national knee ligament register can predict the risk of a patient undergoing a subsequent revision ACL reconstruction after primary surgery with moderate accuracy. This algorithm supports the creation of an in-clinic calculator for point-of-care risk stratification prior to primary surgery based on the input of only five variables. Similar analysis using larger or more comprehensive data may improve the accuracy of risk prediction.

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
Combined Reconstruction Of The Medial Collateral Ligament And Anterior Cruciate Ligament Using Ipsilateral Semitendinosus Tendon And Opposite Semitendinosus With Ipsilateral Gracilis Tendon: A Minimum One-Year Follow-Up Study In NITOR.Dhaka,Bnagladesh Abstract Presentation 4 minutes Dibakar Sarkar, MS(Orthopaedic surgery),FACS(USA),AO fellow(Bangko, BANGLADESH
PROSPECTIVE RANDOMIZED STUDY: Double-bundle against single-bundle ACL reconstruction using allografts Abstract Presentation 5 minutes Edmundo Berumen Nafarrate, PhD, Prof., MEXICO Carlos Alejandro Vega Najera, MD, MEXICO Joel Alejandro Cabral, MD, MEXICO Jesus Javier Tonche, MD, MEXICO Ivan Ramos Moctezuma, Eng, MEXICO Luis Sigala Gonzalez, Eng, MEXICO Avril Pérez Fontes, MD, MEXICO Fatima Quintana Trejo, Eng, MEXICO Carlos Leal, MD, Prof., COLOMBIA
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
Tunnel Position In Anterior Cruciate Ligament Reconstruction Varies Between High Volume And Low Volume Surgeons Abstract Presentation 6 minutes Jonathan D Hughes, MD, PhD, UNITED STATES Christopher M. Gibbs, MD, UNITED STATES Akere Atte, MD, PharmD, UNITED STATES Anmol Almast, BS, UNITED STATES Mikael Sansone, MD, PhD, SWEDEN Jon Karlsson, MD, PhD, Prof., SWEDEN Volker Musahl, MD, Prof., UNITED STATES
The Lateral Femoral Notch Sign Entails Increased Rotatory Laxity After Acl-Injury. Pivot Shift Quantification With Surgical Navigation System Abstract Presentation 5 minutes Gian Andrea Lucidi, MD, ITALY Piero Agostinone, MD, QATAR Stefano Di Paolo, Eng, PhD, ITALY Alberto Grassi, PhD, ITALY Luca Macchiarola, MD, ITALY Giacomo Dal Fabbro, MD, AUSTRALIA Nicola Pizza, MD, ITALY Stefano Zaffagnini, MD, Prof., ITALY
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
Skeletally Immature Patients with Classic Anterior Cruciate Ligament Bone Bruise Patterns Have a Higher Chance of Having an Intact Anterior Cruciate Ligament than Skeletally Mature Patients Abstract Presentation 6 minutes Aaron Baessler, MD, UNITED STATES Jessica M Buchman, MD, UNITED STATES Dexter Witte, MD, UNITED STATES Tyler Brolin, MD, UNITED STATES Thomas Ward Throckmorton, MD Frederick M. Azar, MD, UNITED STATES David Lee Bernholt, MD, UNITED STATES
MRI After ACL Reconstruction Demonstrates that Hamstring Grafts Heal and Integrate at Different Rates Abstract Presentation 6 minutes Sven Edward Putnis, MB ChB FRCS(Tr&Orth), UNITED KINGDOM Takeshi Oshima, MD, PhD, JAPAN Antonio Klasan, MD, PhD, EMBA, FRCS, AUSTRIA Samuel Grasso, PhD, B. Engineering (Mechanical), AUSTRALIA Thomas Neri, MD, PhD, Prof., FRANCE Myles R. J. Coolican, FRACS, AUSTRALIA Brett A. Fritsch, MBBS BSc(Med), FRACS, FAOrthA, AUSTRALIA David A. Parker, MBBS, BMedSc, FRACS, AUSTRALIA
Pre-Operative Tunnel Widening Does Not Significantly Influence The Outcomes Of A Single-Stage Only Approach To Revision Acl Reconstruction: An Analysis Of 409 Consecutive Patients Abstract Presentation 5 minutes Adnan Saithna, MD, FRCS, UNITED STATES Charles Pioger, MD, FRANCE Johnny Rayes, MD, MSc, FEBOT, CANADA Ibrahim Haidar, MD, LEBANON Thomas Fradin, MD, FRANCE Cédric Ngbilo, MD, SWITZERLAND Thais Dutra Vieira, MD, FRANCE Etienne Cavaignac, MD,PhD, FRANCE Bertrand Sonnery-Cottet, MD, PhD, FRANCE
Concurrent Treatment Of A Displaced Bucket Handle And Anterior Cruciate Ligament Reconstruction: A Higher Risk Of Stiffness? Abstract Presentation 5 minutes Etienne Deroche, MD, FRANCE Cécile Batailler, MD, PhD, FRANCE John Swan, MBBS, FRANCE Sebastien Lustig, MD, PhD, Prof., FRANCE Elvire Servien, MD, PhD, Prof., FRANCE
Return To Elite Sport After ACL Reconstruction In 376 'Professional' Athletes Abstract Presentation 5 minutes Kyle Borque, MD, UNITED STATES Mary Jones, MSc, Grad. Dip. Phys., UNITED KINGDOM Ganesh Balendra, MBBS, AUSTRALIA Lukas Willinger, MD, GERMANY Vitor Hugo Pinheiro, MD, UNITED KINGDOM Andy Williams, MBBS, FRCS(Orth), FFSEM(UK), UNITED KINGDOM
Clinical Outcomes Of Primary Acl Reconstruction With Tibial Attachment Preserving Quadrupled Hamstring Graft: Does Graft Size Matter? - A Prospective Study With Review Of Literature Abstract Presentation 5 minutes Shaival Dalal, M.S.MRCS(Edinburgh), UNITED KINGDOM Ghislain N. Aminake, MBBS, MMed(Ortho),MRCPS(Glasg), CAMEROON Randy Guro, BSc, UNITED KINGDOM Amit Pramod Chandratreya, FRCS(Tr&Orth), MS(Orth), MCh(Orth), UNITED KINGDOM Rahul Kotwal, FRCS(Ortho), UNITED KINGDOM
Bone Marrow Aspiration Concentrate Augmentation in Anterior Cruciate Ligament Hamstring Autograft Reconstruction: Clinical and Functional Outcomes of a Cohort Study Abstract Presentation 5 minutes David H. Figueroa, MD, CHILE Rodrigo Guiloff, MD, Prof, CHILE Sergio Arellano, MD, CHILE Alex Vaisman, MD, Prof., CHILE Francisco Figueroa, MD, CHILE Nicolas Zilleruelo, MD, CHILE Rafael Calvo, MD, CHILE
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
Impingement Due to Graft Buckling Is More Prevalent after ACL Reconstructions with an Adjustable-Loop Compared to a Fixed-Loop Abstract Presentation 5 minutes Julian De Rover, NETHERLANDS Inge Van Den Akker-Scheek, PhD, NETHERLANDS Hugo Christiaan van der Veen, MD, PhD, NETHERLANDS
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
Combined ACL and Anterolateral Ligament Reconstruction Confers Significantly Improved Long Term Outcomes when Compared to Isolated ACL Reconstruction: A Matched-Pair Analysis Abstract Presentation 5 minutes Adnan Saithna, MD, FRCS, UNITED STATES Ibrahim Haidar, MD, LEBANON Johnny Rayes, MD, MSc, FEBOT, CANADA Thomas Fradin, MD, FRANCE Cédric Ngbilo, MD, SWITZERLAND Benjamin Freychet, MD, FRANCE Thais Dutra Vieira, MD, FRANCE Herve Ouanezar, MD, UNITED ARAB EMIRATES Bertrand Sonnery-Cottet, MD, PhD, FRANCE
Validation of a Risk Calculator to Personalize Graft Choice and Reduce Rupture Rates for Anterior Cruciate Ligament Reconstruction Abstract Presentation 6 minutes Hana Marmura, MPT, PhD, UNITED STATES Alan Getgood, MD, FRCS(Tr&Orth), DipSEM, QATAR Kurt Paul Spindler, MD, UNITED STATES Michael W Kattan, PhD, UNITED STATES Isaac Briskin, MA, UNITED STATES Dianne M. Bryant, PhD, CANADA
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
Value, Limitations And Recommendations For Use Of Metal-Reduction Knee MRI Sequences Following Anterior Cruciate Ligament Reconstruction Abstract Presentation 6 minutes Brandon Zhao, MD, CANADA Nabil Khan, MBChB, MMED, FCS Orth, CANADA Mark F. Sommerfeldt, MD, CANADA Anukul Panu, MD, CANADA Jacob L Jaremko, MD, PhD, CANADA Catherine May Ting Hui, MD, FRCSC, CANADA
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
THE OUTCOME OF BALANCE EXERCISES AND AGILITY TRAINING FOR POST ANTERIOR CRUCIATE LIGAMENT (ACL) RECONSTRUCTION: CLINICAL ASSESSMENT Abstract Presentation 7 minutes SITI MAIZATUL AKMAL ISMAIL, Medical Science (Orthopaedic Surgery Sports), MALAYSIA
Adding A Lateral Extra-Articular Tenodesis Significantly Reduces Acl Graft Rupture Rates In Pediatric And Adolescent Patients When Compared To Isolated Acl Reconstruction Abstract Presentation 5 minutes Andrea Ferretti, Prof., ITALY Adnan Saithna, MD, FRCS, UNITED STATES Alessandro Carrozzo, MD, ITALY Alessandro Annibaldi, MD, ITALY Fabio Marzilli, MD, ITALY Edoardo Monaco, MD, ITALY
A Comparison of Lower Limb Strength and Plyometric Ability in Athletes who underwent ACLR with Lateral Extra-Articular Ilio-Tibial Band Tenodesis when compared with Isolated ACLR Surgery. A Biomechanical Study. Abstract Presentation 7 minutes Bláithín Brady, BSc MSc , IRELAND Sarah Crosbie, BSc, IRELAND Neil Welch, BSc MSc PhD, IRELAND Mihai Vioreanu, MD, MCh, FFSEM, FRCSI(Tr&Orth), IRELAND
Can Pre-operative MRI Accurately Predict Hamstring Autograft Diameter in Anterior-cruciate Ligament Reconstruction? Abstract Presentation 6 minutes Michael Tan Arnold, BS, UNITED STATES Ignacio Garcia-Mansilla, MD, ARGENTINA Myra Trivellas, MD, UNITED STATES Thomas J. Kremen, MD, 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
Tranexamic Acid Has No Effect On Post-Operative Hemarthrosis Or Pain Control Following Acl Reconstruction Using Bone Patella Tendon Bone Autograft: A Double-Blinded Randomized Control Trial Abstract Presentation 5 minutes Jordan W Fried, BM, UNITED STATES David Bloom, BA, UNITED STATES Eoghan T. Hurley, MB, BCh, MCh, IRELAND Samuel Baron, MD, UNITED STATES Kirk Anthony Campbell, MD, UNITED STATES Eric Jason Strauss, MD Laith M. Jazrawi, MD, UNITED STATES Michael J Alaia, 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
Relationship Between Posterior Tibial Slope And Sagittal Plane Mechanics During Jump Landing After Anterior Cruciate Ligament Reconstruction Abstract Presentation 6 minutes Robert A. Duerr, MD, UNITED STATES Jennifer Perry, MS, UNITED STATES Robert A Magnussen, MD, MPH, UNITED STATES David C. Flanigan, MD, UNITED STATES Benjamin Ormseth, BS, UNITED STATES Robert Siston, PhD, UNITED STATES Andrew Garrone, MD, UNITED STATES Christopher C. Kaeding, MD, UNITED STATES Laura C. Schmitt, PT, PhD, FAPTA, UNITED STATES
Survivability Of Primary Anterior Cruciate Ligament Reconstructions In A Physically High Demand Population Abstract Presentation 6 minutes Ashley Bee Anderson, MD, UNITED STATES Travis Dekker, MD, UNITED STATES Veronika Pav, MS, UNITED STATES Timonthy C Mauntel, PhD, UNITED STATES Matthew T. Provencher, MD, UNITED STATES John M. Tokish, MD, UNITED STATES Jon F. Dickens, MD, UNITED STATES
Full-Thickness Peroneus Longus Tendon Autograft For Anterior Cruciate Ligament Reconstruction: Outcomes And Donor Site Morbidity ePoster Presentation Tarun Goyal, MBBS, MS, DNB, MCh, FRCS (Edin), INDIA Souvik Paul, MBBS, MS Orthopedics (AIIMS), DNB, MCh, Dip SICOT, INDIA Lakshmana Das Sekar, MS, DNB Orthopaedics, INDIA Arghya Kundu Choudhury, MS, MCh Joint replacement and reconstruction, INDIA
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
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
Why, When and Who Fails Non-Operative Treatment of Anterior Cruciate Ligament Injury – An Exploratory Analysis of the COMPARE Trial Abstract Presentation 5 minutes Sabine van der Graaff, MD, NETHERLANDS Duncan E. Meuffels, MD, PhD, Prof., NETHERLANDS Sita Bierma-Zeinstra, MD, NETHERLANDS Eline van Es, MSc, NETHERLANDS Jan Verhaar, MD, PhD, Prof., NETHERLANDS Vincent Eggerding, MD, NETHERLANDS Max Reijman, PhD, NETHERLANDS
The Effect of Lateral Extra-Articular Tenodesis on Medial and Lateral Menisci Loading in Response To Simulated Tests of the Pivot Shift and Anterior Laxity Abstract Presentation 6 minutes Niv Marom, MD, ISRAEL Hamid Jahandar, BS, UNITED STATES Zaid Zayyad, MD, MS, UNITED STATES thomas fraychineaud, MD, UNITED STATES Herve Ouanezar, MD, UNITED ARAB EMIRATES Ronak M. Patel, MD, UNITED STATES Carl W Imhauser, PhD, UNITED STATES Thomas L. Wickiewicz, MD, UNITED STATES Andrew D. Pearle, MD, UNITED STATES Danyal H. Nawabi, MD, FRCS(Orth), UNITED STATES
Dynamic Radiostereometry Evaluation Of Two Different Anterior Cruciate Ligament Reconstruction Techniques: Does Single Bundle Reconstruction Plus Lateral Plasty Cause Knee Over-Constraint? Abstract Presentation 4 minutes Alberto Grassi, PhD, ITALY Stefano Di Paolo, Eng, PhD, ITALY Piero Agostinone, MD, QATAR Gian Andrea Lucidi, MD, ITALY Erika Pinelly, MsC, ITALY Marco Bontempi, PhD, ITALY Laura Bragonzoni, Prof., ITALY Stefano Zaffagnini, MD, Prof., ITALY
Quadriceps Tendon Autograft Has Lower MRI Signal Than Hamstring Tendon Autograft In Anterior Cruciate Ligament Reconstructions Of Adolescent Athletes Abstract Presentation 5 minutes David Alcoloumbre, MD, UNITED STATES Alexandra Hunter Aitchison, UNITED STATES Douglas Mintz, MD, UNITED STATES Frank A. Cordasco, MD, MS, UNITED STATES Daniel W. Green, MD, MS, UNITED STATES
Negative Effects Of Delayed Anterior Cruciate Ligament Reconstruction On Associated Injuries And Knee Laxity Abstract Presentation 6 minutes Riccardo Cristiani, MD, PhD, SWEDEN Per-Mats Janarv, MD, PhD, Associate Prof., SWEDEN Bjorn Engstrom, MD, PhD, Assoc. Prof., SWEDEN Gunnar Edman, MD, PhD, Prof., SWEDEN Magnus Forssblad, SWEDEN Anders Stalman, MD, PhD, Associate Professor, SWEDEN
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, PhD., 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
Quantitative Evaluation of Lateral Articular Cartilage Quality on Magnetic Resonance Imaging at 2-years following Anterior Cruciate Ligament Reconstruction With Or Without A Lateral Extra-Articular Tenodesis Abstract Presentation 6 minutes Andrew Firth, PhD, CANADA Dianne M. Bryant, PhD, CANADA Jaques Milner , CANADA Stephany Pritchett, MD, FRCPC, DABR, CANADA David Holdsworth, PhD, Canada Stability Study Group, CANADA Alan Getgood, MD, FRCS(Tr&Orth), DipSEM, QATAR
Contralateral versus ipsilateral quadriceps graft, for anterior cruciate ligament reconstruction. Abstract Presentation 6 minutes Franco Della Vedova, ARGENTINA Hernan Galan, MD, ARGENTINA Daniel A. Slullitel, MD, Prof., ARGENTINA
Nerve injury during anterior cruciate ligament reconstruction: A comparison between patellar and hamstring tendon grafts harvest Abstract Presentation 5 minutes Jonathan Singer, MD, ISRAEL Ehud Rath, Prof., ISRAEL Mustafa Yassin, MD, ISRAEL Shlomo Bronak, MD, ISRAEL Barak Haviv, MD, ISRAEL
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
Xenograft For Anterior Cruciate Ligament Reconstruction Was Associated With High Graft Processing Infection. Abstract Presentation 6 minutes Willem M. van der Merwe, MBChB, FCS(SA)Ortho, SOUTH AFRICA Martin Lind, MD, PhD, Prof., DENMARK Peter Faunoe, MD, DENMARK Kees van Egmond, MD, NETHERLANDS Stefano Zaffagnini, MD, Prof., ITALY Maurilio Marcacci, MD, ITALY Ramon Cugat Bertomeu, MD, PhD, SPAIN Rene E. Verdonk, Prof Em, MD, PhD, BELGIUM Ernique Ibanez, MD, PhD, SPAIN Giulio Maria Marcheggiani Muccioli, MD, PhD, Associate Professor, ITALY
In Vivo Measurement of Anterior Cruciate Ligament Elongation and Strain Rate during Increasingly Demanding Activities ePoster Presentation Kyohei Nishida , MD, PhD, JAPAN Caiqi Xu, MD, CHINA Tom Gale, MS, UNITED STATES William Anderst, PhD, UNITED STATES Freddie H. Fu, MD, UNITED STATES
The Effect Of Lateral Extraarticular Tenodesis On In Vivo Cartilage Contact In Combined Anterior Cruciate Ligament Reconstruction ePoster Presentation Kyohei Nishida , MD, PhD, JAPAN Tom Gale, MS, UNITED STATES Daisuke Chiba, MD, PhD, JAPAN Felipe Martin Suntaxi, MS, UNITED STATES Bryson P. Lesniak, MD, UNITED STATES Freddie H. Fu, MD, UNITED STATES William Anderst, PhD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES
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
Coach Education Improves Implementation Of ACL Injury Prevention Programs: A Cluster-Randomized Controlled Trial Abstract Presentation 5 minutes Daphne Ling, PhD, MPH, TAIWAN Caroline Boyle, UNITED STATES Brandon Schneider, MS, UNITED STATES Joseph Janosky, DrPHc, MS, PT, ATC, UNITED STATES James Kinderknecht, UNITED STATES Robert G. Marx, MD, UNITED STATES
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
Local Anaesthetic Infiltration (Lia) Is Equally Effective As Adductor Nerve Blocks For Pain Relief In Anterior Cruciate Ligament (Acl) Reconstructions. Abstract Presentation 8 minutes Mohammad Abou Salhab, MBChB, MSc, UNITED KINGDOM Sonal Sonwalkar , FRCA, UNITED KINGDOM Sanjeev Anand, MD, UNITED KINGDOM Martin Stone, MD, UNITED KINGDOM
High Rate of Initially Overlooked Kaplan Fiber Complex Injuries in Patients With Isolated Anterior Cruciate Ligament Injury Abstract Presentation 5 minutes Ryan M Bell, BS, UNITED STATES Daniel P. Berthold, Association.-Prof., GERMANY Lukas Willinger, MD, GERMANY Matthew R. Levasseur, MD, UNITED STATES Daniel Marrero, MD, UNITED STATES Lukas Nawid Muench, MD, GERMANY Andreas B. Imhoff, MD, Prof. Emeritus, GERMANY Elmar Herbst, MD, PhD, GERMANY Mark P. Cote, PT, DPT, MSCTR, UNITED STATES Robert A. Arciero, MD, UNITED STATES Cory M. Edgar, MD, PhD, UNITED STATES
Outcomes Following Anterior Cruciate Ligament Reconstruction in Young Patients: An Observational Study. ePoster Presentation Kunal Mohan, MB MCh MRCSI, IRELAND David Cooper, MB MRCSI, IRELAND Niall McGoldrick, MB MCh FRCS (Tr & Orth), IRELAND Martin Davey, MB MCh MRCSI, IRELAND Megan Diack, MBCHB, MRCSI, MCh, IRELAND Paula McQuail, MB FRCSI, IRELAND Fintan J. Shannon, FRCS (Tr/Orth), IRELAND
Return To Sports After Paediatric Anterior Cruciate Ligament Reconstruction (ACLR): Normal Population Vs An ACLR Cohort Abstract Presentation 6 minutes Alexander S. Nicholls, MSc, FRACS, AUSTRALIA Jillian Lee, BHB, MBChB, FRACS (Ortho), NEW ZEALAND Yoong Lim, BEng, PhD, AUSTRALIA Quang Dao, FRACS, AUSTRALIA
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
Predicting Patient Lost to Follow-up in the STABILITY 1 Study: A Multi-centre, International, Randomized Controlled Trial of Young, Active Patients Undergoing Anterior Cruciate Ligament Reconstruction Abstract Presentation 6 minutes Andrew Firth, PhD, CANADA Dianne M. Bryant, PhD, CANADA Andrew Johnson, PhD, CANADA Stability Study Group, CANADA Alan Getgood, MD, FRCS(Tr&Orth), DipSEM, QATAR
Creating A Crosswalk For Knee Outcomes After ACLR From The KOOS(5) To The IKDC-SKF Abstract Presentation 6 minutes Jessica L. Johnson, DPT, PhD, UNITED STATES Aaron Boulton, PhD, UNITED STATES Kurt Paul Spindler, MD, UNITED STATES Laura J. Huston, MS, UNITED STATES Tim Spalding, FRCS(Orth), UNITED KINGDOM Laura Asplin, UNITED KINGDOM May Arna Risberg, PT, PhD, NORWAY Lynn Snyder-Mackler, PT, ScD, FAPTA, 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
Age, Time From Injury To Surgery And Quadriceps Strength Affect The Risk Of Revision Surgery After Primary Acl Reconstruction Abstract Presentation 6 minutes Riccardo Cristiani, MD, PhD, SWEDEN Magnus Forssblad, SWEDEN Gunnar Edman, MD, PhD, Prof., SWEDEN Karl Eriksson, MD, PhD, Prof., SWEDEN Anders Stalman, MD, PhD, Associate Professor, SWEDEN
Comparison of three different Quadriceps Tendon ACL graft to BTB and Semi-T grafts: A biomechanical study ePoster Presentation Marc Jacob Strauss, MD, NORWAY Jonathan Miles, M.S, UNITED STATES Mitchell Iung Kennedy, BS, UNITED STATES Gilbert Moatshe, MD, PhD, NORWAY Grant J Dornan, MS, UNITED STATES Martin Lind, MD, PhD, Prof., DENMARK Lars Engebretsen, MD, PhD, NORWAY Robert F. LaPrade, MD, PhD, UNITED STATES
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
Same Knee, Different Goals: Patients and Surgeons have Different Priorities Related to ACL Reconstructions and Surgeons are Resistant to Changing Clinical Practice Abstract Presentation 4 minutes Hana Marmura, MPT, PhD, UNITED STATES Dianne M. Bryant, PhD, CANADA Trevor B. Birmingham, PT, PhD, CANADA Kurt Paul Spindler, MD, UNITED STATES Christopher C. Kaeding, MD, UNITED STATES Tim Spalding, FRCS(Orth), UNITED KINGDOM Alan Getgood, MD, FRCS(Tr&Orth), DipSEM, QATAR
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
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
Changes In Muscle Strength And Hop Performance After ACL Reconstruction. A Randomized Controlled Trial Comparing Patellar Tendon And Hamstring Tendon Autografts With Standard Or Accelerated Rehabilitation Abstract Presentation 6 minutes Riccardo Cristiani, MD, PhD, SWEDEN Christina Mikkelsen, PT, SWEDEN Peter Olov Wange, MD, SWEDEN Daniel Olsson, PhD, SWEDEN Anders Stalman, MD, PhD, Associate Professor, SWEDEN Bjorn Engstrom, MD, PhD, Assoc. Prof., SWEDEN
Ligamentous Laxity, Male Sex, Chronicity, Meniscus Injury And Posterior Tibial Slope Are Associated With A High-Grade Pre-Operative Pivot Shift: A Post Hoc Analysis Of The Stability Study Abstract Presentation 6 minutes Lachlan Batty, FRACS, AUSTRALIA Andrew Firth, PhD, CANADA Gilbert Moatshe, MD, PhD, NORWAY Dianne M. Bryant, PhD, CANADA S. Mark A. Heard, MD, FRCS, CANADA Robert G. McCormack, MD, CANADA Alex Rezansoff, MD, FRCSC, CANADA Devin Clarke Peterson, MD, FRCSC, Dip Sport Med, CANADA Davide Bardana, MD, CANADA Peter B. MacDonald, MD, FRCS, Dip Sport Med, CANADA Tim Spalding, FRCS(Orth), UNITED KINGDOM Alan Getgood, MD, FRCS(Tr&Orth), DipSEM, QATAR
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
Risk Factor Analysis for Graft Failure after Anterior Cruciate Ligament Reconstruction with or without mLET Abstract Presentation 7 minutes Filip R Hendrikx, MD, BELGIUM Koen Lagae, MD, BELGIUM Annemieke Van Haver, PhD, MSc, BELGIUM Peter Verdonk, MD, PhD, BELGIUM
The Use Of An Internal Brace In A Single Bundle Hamstring Graft And Its Effect On Graft Healing At 1 Year After Anterior Cruciate Ligament Reconstruction ePoster Presentation Claire Bolton, FRACS, MBBS, AUSTRALIA Brett A. Fritsch, MBBS BSc(Med), FRACS, FAOrthA, AUSTRALIA David A. Parker, MBBS, BMedSc, FRACS, AUSTRALIA Bruno M. Giuffré, MD, AUSTRALIA

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Predicting Subsequent Revision ACL Reconstruction: A Machine Learning Analysis of the Norwegian Knee Ligament Register

Predicting Subsequent Revision ACL Reconstruction: A Machine Learning Analysis of the Norwegian Knee Ligament Register

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Predicting Subsequent Revision ACL Reconstruction: A Machine Learning Analysis of the Norwegian Knee Ligament Register

Predicting Subsequent Revision ACL Reconstruction: A Machine Learning Analysis of the Norwegian Knee Ligament Register

Background

Methods

Results

Conclusions

More ISAKOS 2021: Global Content