Summary: The present study was done to evaluate 3D kinematics dynamics of the whole leg under weight bearing condition in ACL injured knees using upright CT, and suggests that chronic ACL injured knee would lead to rotational changes (decreased screw home movement) with anterior translation of the tibia, while fresh ACL injured knee would have anterior translation of the tibia without rotational abnormalit

Introductions: Although magnetic resonance imaging (MRI) is useful for diagnosis of anterior cruciate ligament (ACL) injuries, it is difficult to assess joint kinematics under weight bearing condition with MRI. Recently, a 320-detector row upright computed tomography (CT) which enables scanning of whole leg in standing position has been available. We aimed to evaluate 3D joint kinematics of the whole leg under weight bearing condition in ACL injured knees using the upright CT. It was hypothesized that abnormal motion would be found on the affected side.

Methods

A total of 18 knee joints in 9 patients with unilateral ACL-deficient knees (4 females and 5 males with a mean age of 34.1 ± 12.6 yrs) were enrolled. Each participant had given a written informed consent and the study protocol was approved by our ethical committee (#20150293).
CT images were acquired from hip joint to whole foot using a 320-detector row upright CT scanner (TSX-401R, Canon Medical Systems, Otawara, Japan). Participants underwent CT imaging in two weight bearing conditions, each in a one-leg standing position (affected or unaffected side). Three-dimension surface data of the femur and the tibia were extracted from CT DICOM data using three-dimensional visualization software (AVIZO 6.3; Thermo Fisher Scientific, Tokyo, Japan). After matching the surface data of the femur, we used the iterative closest point algorithm based on the Visualization Toolkit 8.1.0 (Kitware Inc., NY, USA), for the surface matching technique in which point data on another surface by iterative steps to reach to the closest points. The triaxial positional and angular changes of the tibia relative to the femur were measured. Angular changes around each axis can be described by the Euler/Cardan angles representing three sequential rotations about the anatomical axis of the proximal bone.
Participants are divided into two groups based on fresh (within three months after injury) or chronic ACL injury, and the unaffected side was compared to the affected side in each group. The differences were compared statistically using two-tailed paired t-test, and the level of significance was set at p<0.05. For statistical analysis, SPSS software (IBM, Armonk, NY, USA) was used.

Results

Four participants were classified as fresh injury and five as chronic. In fresh group, anterior translation of the tibia was significantly greater on the affected side than on the unaffected side under full weight bearing (18.1mm vs 15.1mm, p<0.05), while no significant differences were found for rotation. On the other hand, in chronic group, tibial external rotation was greater on the unaffected side than on the affected side (15.2° vs 7.8°, P<0.01).

Discussion

According to previous literatures, anterior translation and internal rotation of the tibia have been reported to be greater in ACL-deficient knees compared to healthy knees using MRI. However, knee kinematics under weight bearing condition have been still unknown. To the best of our knowledge, this is the first study to assess knee kinematics under weight bearing condition using novel upright CT. Our findings suggest that chronic ACL injured knee will lead to rotational changes (decreased screw home movement) as well as anterior translation of the tibia.

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Short Message Service-Based Collection of Patient Reported Outcome Measures Following ACL Reconstruction: A Pilot Study ePoster Presentation Steffen Sauer, MD, DENMARK
Non-Operative Treatment is an Excellent Option for Isolated Anterior Cruciate Ligament Injuries: a Systematic Review and Meta-Analysis ePoster Presentation Robert de Jonge, MD, HUNGARY Miklos Mate, MD, HUNGARY Norbert Kovacs, MD, HUNGARY Marcell Imrei, MD, , HUNGARY Karoly Pap, MD, PhD, HUNGARY Gergely Agocs, PhD, HUNGARY Peter Hegyi, Prof., HUNGARY Gergely Pánics, PhD, HUNGARY
Fear Of Reinjury Following Primary Anterior Cruciate Ligament Reconstruction (ACLR): A Systematic Review ePoster Presentation Basit Mir, MB, BcH, BAO, LRCP and Si, CANADA Prushoth Vivekanantha, MD, CANADA Saihaj Dhillon, BHSc, CANADA Odette Cotnareanu, BSc, CANADA Dan Cohen, MD, CANADA Kanto Nagai, MD, PhD, JAPAN Darren L. de SA, MD MBA FRCSC, CANADA
Quad Versus Patella Tendon Autograft for Anterior Cruciate Ligament Reconstruction In Young Athletes ePoster Presentation Cory Riccio, MD, UNITED STATES Nathan Fackler, MD, UNITED STATES Christopher M Kuenze, PhD, UNITED STATES Tarun Vippa, BS, UNITED STATES Sarah Powell, MD, UNITED STATES Rachel E Cherelstein, BS, UNITED STATES Edward S. Chang, MD, UNITED STATES
Healing Trajectory of The Patellar Tendon After Anterior Cruciate Ligament Reconstruction With Bone-Patellar Tendon-Bone Autograft ePoster Presentation Naoaki Ito, PT, DPT, UNITED STATES Haraldur Sigurðsson, PT, MSc, PhD, ICELAND Lynn Snyder-Mackler, PT, ScD, FAPTA, UNITED STATES Karin Grävare Silbernagel, PT, PhD, ATC, UNITED STATES
Role of Biophysic Stimulation with Pulsed Electromagnetic Fields on Bone Bruise in Anterior Cruciate Ligament Reconstruction ePoster Presentation Vito Gaetano Rinaldi, MD, ITALY Iacopo Sassoli, MD, ITALY Matteo La Verde, MD, ITALY Eugenio Cammisa, MD, ITALY Federico Coliva, MD, ITALY Alberto Fogacci, MD, ITALY Giada Lullini, MD, PhD, ITALY Stefano Zaffagnini, MD, Prof., ITALY Giulio Maria Marcheggiani Muccioli, MD, PhD, Associate Professor, ITALY
Does Delaying First Revision ACLR Result in Poorer Outcomes? Evaluation of Association Between Surgical Timing and Outcomes ePoster Presentation Bryce Dzubara, BS, UNITED STATES Parker Cavendish, BS, UNITED STATES Eric Milliron, BS, UNITED STATES James C. Kirven, BS, UNITED STATES Spencer E. Talentino, MD, UNITED STATES Ryan H. Barnes, MD, UNITED STATES Charles Qin, MD, UNITED STATES David C. Flanigan, MD, UNITED STATES Robert A. Duerr, MD, UNITED STATES Christopher C. Kaeding, MD, UNITED STATES Robert A Magnussen, MD, MPH, UNITED STATES
Quadrupled Semitendinosus vs. Semitendinosus-Gracilis Graft for ACL Reconstruction:a Randomized Controlled Trial ePoster Presentation Juan Pablo Martinez-Cano, MD, MSc, PhD, COLOMBIA Laura Zamudio, MD, COLOMBIA Julian Chica, MD, COLOMBIA Juan José Martinez Arboleda, MD, COLOMBIA Fernando M. Mejia, MD, COLOMBIA Alfredo Martinez Rondanelli, MD, COLOMBIA
ACL Graft Tear or Contralateral ACL Tear: Which is Worse??? ePoster Presentation Robert A Magnussen, MD, MPH, UNITED STATES Yuxuan Jin, MS, UNITED STATES Kurt Paul Spindler, MD, UNITED STATES
Risk Factor Of Failure After The Revision Anterior Cruciate Ligament Reconstruction ePoster Presentation Takeo Tokura, MD, JAPAN Takehiko Matsushita, MD, PhD, JAPAN Kyohei Nishida , MD, PhD, JAPAN Kanto Nagai, MD, PhD, JAPAN Noriyuki Kanzaki, MD, PhD, JAPAN Yuichi Hoshino, MD, PhD, JAPAN Ryosuke Kuroda, MD, PhD, JAPAN
Contralateral ACL Rupture is More Common than ACL Graft Rupture in Australian Netballers After ACL Reconstruction ePoster Presentation Conor Honeywill, MD, B. Phty, AUSTRALIA Lucy J. Salmon, PhD, AUSTRALIA Leo A. Pinczewski, MBBS, FRACS, FAOA, AUSTRALIA Keran Sundaraj, MBBS MCs (Trauma) FRACS FAOA, AUSTRALIA Justin P. Roe, MB BS BSc(Med) Hons FRACS, A/Prof., AUSTRALIA
Influence Of Femoral Tunnel Interference Screw Diameter On Pull-Out Strength And Failure Mode During Anterior Cruciate Ligament Reconstruction: A Biomechanical Study ePoster Presentation Jason G Ina, MD, UNITED STATES Mark Megerian, BS, UNITED STATES Derrick Michael Knapik, MD, UNITED STATES Jacob Giovanni Calcei, MD, UNITED STATES Clare M Rimnac, PhD James E. Voos, MD
Outcomes of Revision Anterior Cruciate Ligament Reconstruction with autogenous Quadriceps Tendon graft ePoster Presentation Gustavo A. Rincon, MD, COLOMBIA Edgar Alberto Munoz, MD, COLOMBIA Camilo Marin, MD, COLOMBIA Hans Martin, MD, COLOMBIA Angela Morales, MD, COLOMBIA
Posterior Tibial Plateau Compression Fractures Coinciding with ACL Injury: Means of Identification, Treatment Decision-Making Process and Clinical Relevance of Proposed MRI-Based Classification System ePoster Presentation Robert Smigielski, MD, PhD, POLAND Beata Ciszkowska-Lyson, PhD, POLAND Aleksandra Zielinska, MA, BSc, POLAND Christian Fink, MD, Prof., AUSTRIA Mirco Herbort, MD, Prof., GERMANY
Elevated Posterior Tibial Slope is Associated with Anterior Cruciate Ligament Reconstruction Failures: A Systematic Review and Meta-Analysis ePoster Presentation Benjamin Ormseth, BS, UNITED STATES Jeremy Adelstein, BS, UNITED STATES Andrew Garrone, MD, UNITED STATES Alex C. Dibartola, MD, MPH, UNITED STATES Ryan H. Barnes, MD, UNITED STATES Charles Qin, MD, UNITED STATES Christopher C. Kaeding, MD, UNITED STATES David C. Flanigan, MD, UNITED STATES Robert Siston, PhD, UNITED STATES Robert A Magnussen, MD, MPH, UNITED STATES Robert A. Duerr, MD, UNITED STATES
Static Anterior Tibial Translation After Anatomic ACLR: An MRI Analysis ePoster Presentation Ignacio Garcia-Mansilla, MD, ARGENTINA Fernando Holc, MD, ARGENTINA Ignacio Astore, MD, ARGENTINA Camila Juana, MD, ARGENTINA Juan Pablo Zicaro, MD, ARGENTINA Carlos H. Yacuzzi, MD, ARGENTINA Matias Costa-Paz, MD, PhD, ARGENTINA
Novel Arthrometer Provides Quantitative and Objective Measures of Uniplanar and Multiplanar Knee Laxity ePoster Presentation Erin Berube, MS, BS, UNITED STATES Akinola E Oladimeji, MD, UNITED STATES David Shamritsky, MEng, UNITED STATES Deborah Jones, PT, OCS, SCS, UNITED STATES Michael Parides, PhD, UNITED STATES Andrew D. Pearle, MD, UNITED STATES Danyal H. Nawabi, MD, FRCS(Orth), UNITED STATES Thomas L. Wickiewicz, MD, UNITED STATES Carl W Imhauser, PhD, UNITED STATES
Predictors of Joint Space at a Minimum 10 Years Following Single-Bundle Bone-Patellar Tendon-Bone ACL Reconstruction Using a Transtibial Technique ePoster Presentation Kevin D. Plancher, MD, MPH, UNITED STATES Karen Briggs, MPH, UNITED STATES Stephanie C. Petterson, MPT, PhD, UNITED STATES
Midterm Clinical Outcomes and Knee Stability After ACL Reconstruction With a Hybrid Graft Using Hamstring Autograft and Ligament Augmentation and Reconstruction System LARS ePoster Presentation Antonios T. Kouzelis, MD, PhD, GREECE Andreas Panagopoulos, Associate Professor, GREECE Panagiotis Antzoulas, MD, MSc, GREECE Panagiotis Tsiplakos, MD, GREECE Georgios Sinos, MD, GREECE Spyridon Papagiannis, MD, GREECE Ioannis Gliatis, MD, PhD, Assistant Proffessor, GREECE
Using Three-Dimension Magnetic Resonance Imaging Of The Intact Knee To Identify Expected Femoral And Tibial Tunnel Position In Anatomic Single Bundle Anterior Cruciate Ligament ePoster Presentation NAM TU VU, MD, VIETNAM Minh Ngoc Ho, MD, VIETNAM My Than, MSc, VIETNAM NANG SY QUYEN VO, MD, VIETNAM Toan Dinh Duong, MD, PhD, VIETNAM Trần Trung Dũng, Professor, MD, PhD, VIETNAM
No Single Dominant Risk Factor for Noncontact ACL Injury: Key Thresholds and Relative Contributions of Knee Geometry and Anterior-Posterior Laxity ePoster Presentation Jacob Zeitlin, BA, UNITED STATES Mark Alan Fontana, PhD, UNITED STATES Michael Parides, PhD, UNITED STATES Thomas L. Wickiewicz, MD, UNITED STATES Andrew D. Pearle, MD, UNITED STATES Danyal H. Nawabi, MD, FRCS(Orth), UNITED STATES Bruce D. Beynnon, PhD, UNITED STATES Carl W Imhauser, PhD, UNITED STATES
The Effect of Delaying Anterior Cruciate Ligament Reconstruction More Than 3 or 6 Months on Revision Rates and Knee Stability After 2 Years of Follow-up ePoster Presentation Helena Amstrup Jensen, BSc, DENMARK Torsten Grønbech Nielsen, PhD., DENMARK Martin Lind, MD, PhD, Prof., DENMARK
Elevated Tibial Spine Height as a Predictor of Reinjury after Anterior Cruciate Ligament Reconstruction ePoster Presentation Naofumi Hashiguchi, MD,MPH, JAPAN Atsuo Nakamae, MD, PhD, JAPAN Goki Kamei, MD, PhD, JAPAN Masakazu Ishikawa, MD, PhD, JAPAN Nobuo Adachi, MD, PhD, JAPAN
Effect of The Tibial Tunnel Communication on the Bone-Tendon Healing and Location of the Graft at the Tibial Tunnel Aperture in The Double-Bundle Anterior Cruciate Ligament Reconstruction ePoster Presentation Naoto Suzue, MD, PhD, JAPAN Yoshitsugu Takeda, MD, PhD, JAPAN
The Statistical Fragility Of Clinical Trials Comparing Bone-Patellar Tendon-Bone Versus Hamstring Tendon Autografts In Anterior Cruciate Ligament Reconstruction Surgery: A Systematic Review ePoster Presentation Jeffrey Okewunmi, BS, UNITED STATES Zakaria Chakrani, BA, UNITED STATES John K Cordero, MD, UNITED STATES Robert L Parisien, MD, UNITED STATES
An Analysis Of Repeat Anterior Cruciate Ligament Injury and Return to Sport in Australian Soccer Players Demonstrates Hamstring Autografts to be a Reliable Option ePoster Presentation Jonathan R Manara, BMBS, FRCS (Tr & Orth), UNITED KINGDOM Lucy J. Salmon, PhD, AUSTRALIA Faisal Kilani, BSc, AUSTRALIA Claire Monk, BS, AUSTRALIA Keran Sundaraj, MBBS MCs (Trauma) FRACS FAOA, AUSTRALIA Leo A. Pinczewski, MBBS, FRACS, FAOA, AUSTRALIA Justin P. Roe, MB BS BSc(Med) Hons FRACS, A/Prof., AUSTRALIA
Blumensaat’s Line Morphology Does Not Influence the Femoral Tunnel Position in Anatomical Double-Bundle ACL Reconstruction ePoster Presentation Yoshiyuki Yahagi, MD,PhD, JAPAN Takanori Iriuchishima, MD, PhD, JAPAN Keinosuke Ryu, Prof., JAPAN Kazuyoshi Nakanishi, Prof., JAPAN
Anatomic ACL Reconstruction with Quadriceps Tendon Graft Resulted in Equivalent Knee Laxity Compared to Hamstring Tendon Graft ePoster Presentation Katrin Karpinski, MD, GERMANY Martin Häner, MD, GERMANY Theresa Diermeier, MD, GERMANY Wolf Petersen, MD, Prof, GERMANY
Effects of Focused Extracorporeal Shock Wave Therapy in Reducing Pain In Patients With Anterior Knee Pain After ACLR with BTB Autograft ePoster Presentation Hideaki Fukuda, MD, JAPAN
Failure Rates and Complications with Multiple-Revision Anterior Cruciate Ligament Reconstruction: Comparison of Anatomic Femoral Tunnel and Over The Top Technique ePoster Presentation Emre Anıl Özbek, MD, TURKEY Philipp W. Winkler , MD , AUSTRIA Ehab M Nazzal, MD, UNITED STATES Balint Zsidai, HUNGARY Nicholas P Drain, MD, UNITED STATES Janina Kaarre, MD MSc, UNITED STATES Andrew Sprague, PT, PhD, DPT, UNITED STATES Bryson P. Lesniak, MD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES
Concomitant Chondral Injury and ACL Reconstruction ePoster Presentation Emily Schueppert, BS, UNITED STATES S. Ali Ghasemi, MD, UNITED STATES Diannemarie Omire-Mayor, MD, UNITED STATES Arthur R Bartolozzi, MD, UNITED STATES
Adhesion Between the Anterior Cruciate Ligament Grafts and the Transverse Ligament of the Menisci: An effect of Arthroscopic Release ePoster Presentation Masashi Kusano, MD, PhD, JAPAN Keisuke Kita, MD, PhD, JAPAN Ryohei Uchida, MD, PhD, JAPAN Yukiyoshi Toritsuka, MD, PhD, JAPAN
Comparison of the Tissue Molecular Profile Of ACL Repair, ACL Reconstruction, and Native ACL ePoster Presentation Edoardo Monaco, MD, ITALY Danilo Ranieri, MD, ITALY Alessandro Annibaldi, MD, ITALY Alessandro Carrozzo, MD, ITALY Fabio Marzilli, MD, ITALY Vincenzo Visco, Prof., ITALY Andrea Ferretti, Prof., ITALY
Simultaneous Reconstruction of the Anterior Cruciate Ligament and Medial Collateral Ligament Using Semitendinosus and Gracilis Autografts: A Minimum 2-Year Follow-Up Study ePoster Presentation Miten Rajendra Sheth, MBBS, MS, DNB (Orth), INDIA
Single Graft Revision Anterior Cruciate Ligament Reconstruction With Anterolateral Extra-Articular Reconstruction: Description Of A Surgical Technique. Clinical And Functional Results After a 2 Year Follow-Up ePoster Presentation Monica Sánchez Santiuste, MD, SPAIN Cristina Jiménez Nava, Resident, SPAIN Víctor Vaquerizo García, MD, PhD, SPAIN Marta García López, SPAIN
Is There Any Benefit In Anterior Cruciate Ligament Reconstruction In Patients Over 60 Years Old? ePoster Presentation Panagiotis G. Ntagiopoulos, MD, PhD, GREECE Paolo Ferrua, MD, ITALY Guillaume Demey, MD, FRANCE David H. Dejour, MD, FRANCE
No Difference in Clinical Outcomes Between Aperture And Suspensory Femoral-Sided Fixation Following Anterior Cruciate Ligament Reconstruction with Bone-Patellar Tendon-Bone Autograft ePoster Presentation Garrison Hughes, BS, UNITED STATES Cory Riccio, MD, UNITED STATES Tarun Vippa, BS, UNITED STATES Christopher M Kuenze, PhD, UNITED STATES Rachel E Cherelstein, BS, UNITED STATES Mitchell A Nader, , UNITED STATES Laura Keeling, MD, UNITED STATES Theodore N Rudic, BS, UNITED STATES Kory B. Dylan Pasko, BS, UNITED STATES Edward S. Chang, MD, UNITED STATES
Analysis of Historic and Modern Treatment Outcomes in Primary Anterior Cruciate Ligament Repair: Systematic Review and Meta-analysis ePoster Presentation Jaren LaGreca, MD, UNITED STATES Marc Tompkins, MD, UNITED STATES
Does Contamination During Harvesting as Well As During Suture Preparation and Manipulation of the Hamstrings Graft for Anterior Cruciate Ligament Reconstruction Correlates With Postoperative Infection? ePoster Presentation Stefanos Christos Papageorgiou, MD, GREECE Tilemachos Papageorgiou, MD, GREECE Errikos Petkidis, Md , GREECE Christos D. Papageorgiou, MD, PhD, GREECE
Investigation of the Effect Of Anterior Cruciate Ligament Injury on the Axial Rotation of the Knee Joint ePoster Presentation Kenjiro Okimura, JAPAN Yuichi Hoshino, MD, PhD, JAPAN Kyohei Nishida , MD, PhD, JAPAN Kanto Nagai, MD, PhD, JAPAN Noriyuki Kanzaki, MD, PhD, JAPAN Takehiko Matsushita, MD, PhD, JAPAN Ryosuke Kuroda, MD, PhD, JAPAN
Impact of ACLR Graft Choice on Meniscal Repair Outcomes ePoster Presentation Emily Coffey-Noriega , BS, UNITED STATES Amogh Iyer, BS, UNITED STATES Parker Cavendish, BS, UNITED STATES Eric Milliron, BS, UNITED STATES Spencer E. Talentino, MD, UNITED STATES James C. Kirven, BS, UNITED STATES Charles Qin, MD, UNITED STATES Ryan H. Barnes, MD, UNITED STATES David C. Flanigan, MD, UNITED STATES Robert A Magnussen, MD, MPH, UNITED STATES
Sex-Based Difference of the Most Common Autograft Sources for ACL Reconstruction Measured on Knee MRI ePoster Presentation Giovanna Medina, MD, MSc, PhD, UNITED STATES Maria Virginia Velasquez-Hammerle, MD, UNITED STATES Miho J. Tanaka, MD, PhD, UNITED STATES
Knee Arthroscopy: The “Crevice Sign,” A New Pathognomonic Sign For Unstable Posterior Medial Meniscal Tear In Anterior Cruciate Ligament Deficient Knees ePoster Presentation J Donald Hansom, FRCS, MD, MBChB, BSc (Hons), UNITED KINGDOM Jérôme Murgier, MD, FRANCE Mark G. Clatworthy, FRACS, NEW ZEALAND
Lower Socioeconomic Status Adversely Affects Timing of Care and Rate of Re-Injury Following Anterior Cruciate Ligament Reconstruction ePoster Presentation Eduardo J Natal-Albelo, MD, UNITED STATES Rachel E Cherelstein, BS, UNITED STATES Christopher M Kuenze, PhD, UNITED STATES Andrew Curley, MD, UNITED STATES Blake M. Bodendorfer, MD, UNITED STATES Mark Hopkins, MD, UNITED STATES Christine Conroy, MD, UNITED STATES Caroline Fryar, MD, UNITED STATES David X. Wang, MD, UNITED STATES Edward S. Chang, MD, UNITED STATES
Bone–Patellar Tendon–Bone Autograft and Female Sex are Associated with the Presence of Cyclops Lesions and Syndrome After Anterior Cruciate Ligament Reconstruction ePoster Presentation Tomohiro Tomihara, MD, JAPAN Yusuke Hashimoto, MD, PhD, JAPAN Kazuya Nishino, MD, JAPAN Shuko Tsumoto, MD, JAPAN
Outcomes of Isolated HTO and Simultaneous HTO and ACL Reconstruction: A Systematic Review & Meta-Analysis ePoster Presentation Varun Dewan, MBChB MSc FRCS, UNITED KINGDOM Lebur Rohman, MBBS, MRCS, FRCSEd, UNITED KINGDOM Martyn Snow, FRCS, UNITED KINGDOM
A Comparison of Return to Sport Rates Between Male and Female Athletes After Anterior Cruciate Ligament Reconstruction in an Australian Context ePoster Presentation Haydn Klemm, BFSc&Nutr (Hons), AUSTRALIA Kate E. Webster, PhD, AUSTRALIA Julian A. Feller, FRACS, FAOrthA, AUSTRALIA
The Relationship of Non-Anatomical Tunnel Position and Revision Anterior Cruciate Ligament Reconstruction ePoster Presentation Burçin Karsli, MD, Assoc. Prof., TURKEY Erman Öğümsöğütlü, MD, TURKEY
An Evaluation Of The Relationship Between The Knee Stability And Remnant Re-Attachment In Anterior Cruciate Ligament Injury ePoster Presentation YUSUKE SASAKI, MD, JAPAN Satomi Abe, MD, PhD, JAPAN Keisuke Matsukura, UNITED STATES
Biomechanical Study of the Elastic Fixation of the Posterolateral Fracture of the Tibial Plateau: Arrow Technique ePoster Presentation Oscar Ares, PhD, SPAIN David Gutierrez Medina, MD, SPAIN Carlos Andres Morales-Marin, MD, SPAIN Salvador Madariaga, MD, SPAIN Andrea Sallent, MD, PhD, SPAIN Jose Alonso Zumbado, MD, SPAIN Manuel Llusà, SPAIN
Trends in Revision Anterior Cruciate Ligament Reconstruction and Return to Sport: A Survey of the Herodicus Society ePoster Presentation Michael Andrew Fox, MD, UNITED STATES Ian DeYoe Engler, MD, UNITED STATES Andrew Curley, MD, UNITED STATES Damaris Susana Mohr, PA-C, UNITED STATES Justin W. Arner, MD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES James P. Bradley, MD, UNITED STATES
Femoral Button is Not Applied: Does It Matter ? ePoster Presentation Mohamed Amine Gharbi , MD, TUNISIA Moatassem Belleh Jelassi, MD, TUNISIA Ahmed Zendeoui, MD, TUNISIA Houssem Eddine Chahed, MD, TUNISIA Anis Tebourbi, MD, TUNISIA Ramzi Bouzidi, PhD, TUNISIA Khelil Ezzaouia, PhD, TUNISIA Mouadh Nefiss, MD, TUNISIA
Implant-Free Reconstruction Techniques For Ligaments Injuries Of The Knee – Cost-Effective Innovative Alternatives For The Traditional Techniques ePoster Presentation Girinivasan Chellamuthu, MBBS, MS Ortho, FIOT, FASM, INDIA Santosh Sahanand Kulasekaran, MBBS,MS(ortho), INDIA David V. Rajan, MS(Orth), MNAMS(Orth), FRCS(G), INDIA
Time From ACL Injury Time To Surgery: Evaluating A Multifaceted Set of Potential Predictors ePoster Presentation Claire Giachino, BA, UNITED STATES Hannah Rossing, BS, UNITED STATES David Howell, PhD, UNITED STATES Curtis D. Vandenberg, MD, UNITED STATES Jay C. Albright, MD, UNITED STATES
Comparison of Clinical Outcomes between a Bone-Patellar Tendon-Bone and Quadriceps Tendon-Bone Autografts in Anatomic Rectangular Tunnel Anterior Cruciate Ligament Reconstruction ePoster Presentation Kazunori Shimomura, MD, PhD, Prof., JAPAN Yasukazu Yonetani, MD, PhD, JAPAN Ayaka Tanaka, MD, JAPAN Akira Tsujii, MD, PhD, JAPAN Masayuki Hamada, MD, JAPAN
Return To Play And Pattern Of Injury In A Consecutive Case Series Of Elite UEFA Football Player Following Anterior Cruciate Ligament Rupture ePoster Presentation Luca Farinelli, MD, ITALY Elisabeth Abermann, MD, AUSTRIA Amit Meena, MBBS, MS, DNB, INDIA Christian Fink, MD, Prof., AUSTRIA
Short-Term Outcomes of All-Inside Anterior Cruciate Ligament Reconstruction by the Trans-Femoral Approach ePoster Presentation Toshiaki Takahashi, MD, PhD, Prof., JAPAN Seiji Watanabe, MD, JAPAN
The Relationship Between Preoperative Static Anterior Tibial Subluxation and Graft Maturation on MRI After Double-Bundle Anterior Cruciate Ligament Reconstruction ePoster Presentation Shigehiro Asai, MD, JAPAN Hideaki Fukuda, MD, JAPAN Takahiro Ogura, MD, JAPAN Kenji Takahashi, MD, PhD, JAPAN
Patients Undergoing Reconstruction For Multi-Ligament Knee Injuries Caused By Pivoting Sports Restore Function And Return to Sport at a Similar Level to Their Isolated ACL Counterparts: A Prospective Matched Cohort Study ePoster Presentation Jay R. Ebert, PhD, AUSTRALIA Peter Edwards, PhD, AUSTRALIA Shahbaz S Malik, BSc, MB BCh, MSc (Orth Engin), LLM, FRCS (Tr&Orth), UNITED KINGDOM Stephen Dalgleish, MBChB, MRCS, FRCS, UNITED KINGDOM Antony Raymond, FRCS, UNITED KINGDOM Randeep Singh Aujla, MBChB ChM FRCS (Tr&Orth) MFSEM, UNITED KINGDOM Robert Evans, MD, AUSTRALIA Michael Andreas Finsterwald, MD, AUSTRALIA Uriel Giwnewer , MD, ISRAEL Ashley Iain Simpson, BA(Hons), MBBS, MSc, MA(Cantab), FRCS(Tr&Orth), UNITED KINGDOM Sat Gohil, MBBS, FRACS(Ortho), AUSTRALIA Peter Alberto D'Alessandro, MBBS Hons. (UWA) FRACS FAOrthA, AUSTRALIA
Isolated Anatomic Reconstruction of Anterior Cruciate Ligament in Sportsmen with High Pivot Shift Grade: Is it Enough for Rotational Stability? ePoster Presentation Mohamed Amine Gharbi , MD, TUNISIA Moatassem Belleh Jelassi, MD, TUNISIA Houssem Eddine Chahed, MD, TUNISIA Ahmed Zendeoui, MD, TUNISIA Anis Tebourbi, MD, TUNISIA Ramzi Bouzidi, PhD, TUNISIA Khelil Ezzaouia, PhD, TUNISIA Mouadh Nefiss, MD, TUNISIA
All Soft Tissue Quadriceps Tendon Vs Quadriceps Tendon With Bone Block In Primary ACL Reconstruction ePoster Presentation Joshua C Setliff, BA, UNITED STATES Ehab M Nazzal, MD, UNITED STATES Nicholas P Drain, MD, UNITED STATES Zachary J Herman, MD, UNITED STATES Asher B Mirvish, BA, UNITED STATES Clair Smith, MSc, UNITED STATES Bryson P. Lesniak, MD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES Jonathan D Hughes, MD, PhD, UNITED STATES
Peri-Operative Complications, Safety, and Early Outcomes of a Novel ACL + ALL Reconstruction Technique Using Iliotibial Band Autograft vs. Patellar Tendon ACL Reconstruction: A Retrospective Pilot Study of the Saturn Study Group ePoster Presentation Ben E. Heyworth, MD, UNITED STATES Joshua H. Pang, BA, UNITED STATES Yi-Meng Yen, MD, UNITED STATES Dennis Kramer, MD Mininder Kocher, MD, MPH, UNITED STATES
Outcomes After Operative and Nonoperative Treatment of Anterior Cruciate Ligament Ruptures in Patients Aged 40 and Older: A 2:1 Propensity Score Matched Analysis ePoster Presentation Richard Puzzitiello, MD, UNITED STATES Madison Hayes-Lattin, BS, UNITED STATES Jack Bragg, MD, UNITED STATES Stephen Sylvia, MD, UNITED STATES Matthew Salzler, MD, UNITED STATES
Spin in the Abstracts of Meta-Analyses and Systematic Reviews: Quadriceps Tendon Graft for Anterior Cruciate Ligament Reconstruction ePoster Presentation Matthew T Gulbrandsen, MD, UNITED STATES Taha Taka, BS, UNITED STATES Joshua Peterson, BS, UNITED STATES Jun Ho Chung, MD, UNITED STATES Hasan Syed, MD Austin V Stone, MD, PhD, UNITED STATES John Xerogeanes, MD, UNITED STATES Joseph N. Liu, MD, UNITED STATES
Clinical And Patient-Reported Outcomes Of Arthroscopic Repair Versus Reconstruction Of The Cruciate Ligaments In The Multiligamentous Injured Knee ePoster Presentation Sebastian Rilk, MD, UNITED STATES Gabriel C Goodhart, BsC, UNITED STATES Kurt S. Holuba, BA, UNITED STATES Harmen D. Vermeijden, MD, UNITED STATES Robert O'Brien, MHS, PA-C, UNITED STATES Jelle P. van der List, MD, PhD, NETHERLANDS Gregory S. Difelice, MD, UNITED STATES
Patellar Tendon Autograft is Associated with Difficulty Kneeling but Does Not Result in a More Painful or Symptomatic Knee Compared to Hamstring Tendon Autograft after Anterior Cruciate Ligament Reconstruction: Results from the New Zealand ACL Registry ePoster Presentation Richard Rahardja, MBChB, BMedSc(Hons), NEW ZEALAND Hamish Love, FRACS, NEW ZEALAND Mark G. Clatworthy, FRACS, NEW ZEALAND Simon W. Young, MD, FRACS, NEW ZEALAND
A Prospective Comparison of Postoperative Pain and Opioid Consumption between Primary Repair and Reconstruction of the Anterior Cruciate Ligament ePoster Presentation Sebastian Rilk, MD, UNITED STATES Harmen D. Vermeijden, MD, UNITED STATES Xiuyi A Yang, M.S., UNITED STATES Robert O'Brien, MHS, PA-C, UNITED STATES Jelle P. van der List, MD, PhD, NETHERLANDS Gregory S. Difelice, MD, UNITED STATES
New Injuries Within 2 Years After Acute ACL Injury Treated With Either ACL Reconstruction and Rehabilitation or With Rehabilitation Alone ePoster Presentation Anna Samuelsson Selin , MD, PhD student, SWEDEN Hakan Gauffin, MD PhD, SWEDEN Anne Fältström, PhD, SWEDEN Joanna Kvist, Professor, SWEDEN
Technique for Increasing the Strength of Fixation to the Suspensory Button in Anterior Cruciate Ligament Reconstruction Using the Quadriceps Tendon ePoster Presentation Tomoyuki Kanayama, MD, JAPAN Junsuke Nakase, MD, PhD, JAPAN Rikuto Yoshimizu, JAPAN Yusuke Yanatori, MD, JAPAN Hiroyuki Tsuchiya, JAPAN
Ideal Combination Of Anatomic Tibial And Femoral Tunnel Positions for Single-Bundle ACL Reconstruction ePoster Presentation Kyoung Ho Yoon, MD, PhD, Prof., KOREA, REPUBLIC OF Cheol Hee Park, MD, PhD, KOREA, REPUBLIC OF Sang-Gyun Kim, MD, PhD, KOREA, REPUBLIC OF Jae-Young Park, MD, KOREA, REPUBLIC OF Yoon-Seok Kim, MD, KOREA, REPUBLIC OF Hee Sung Lee, MD, KOREA, REPUBLIC OF Sung Hyun Hwang, MD, KOREA, REPUBLIC OF Dae Keun Suh, MD, PhD, KOREA, REPUBLIC OF Bo Seung Bae, MD, KOREA, REPUBLIC OF
Comparable Primary Stability Between Current-Generation Adjustable Loop Cortical Buttons for Anterior Cruciate Ligament Reconstruction – A Biomechanical Study ePoster Presentation Adrian Deichsel, MD, GERMANY Lara Leibrandt, cand. med., GERMANY Michael J. Raschke, MD, Prof., GERMANY Matthias Klimek, M. Sc., GERMANY Jens Wermers, MD, GERMANY Christian Peez, MD, GERMANY Thorben Briese, MD, GERMANY Elmar Herbst, MD, PhD, GERMANY Christoph Kittl, MD, MD(res), GERMANY Johannes Glasbrenner, MD, GERMANY
Adductor Canal Block is Superior to Femoral Nerve Block for Early Postoperative Pain Relief after Single Bundle Anterior Cruciate Ligament Reconstruction with Hamstring Autograft ePoster Presentation Takeshi Oshima, MD, PhD, JAPAN Junsuke Nakase, MD, PhD, JAPAN Kengo Shimozaki, MD, JAPAN Rikuto Yoshimizu, JAPAN Mitsuhiro Kimura, JAPAN Tomoyuki Kanayama, MD, JAPAN Yusuke Yanatori, MD, JAPAN Hiroyuki Tsuchiya, JAPAN
A Novel Quantitative Assessment of Bone Tendon Junction Healing in Patients after ACL Reconstruction by High Resolution Peripheral Computer Tomography: The Development of a Deep-Learning System ePoster Presentation Michael Tim Yun Ong, MBChB(UK), BSc(UK), MRCS(Edin), MSc(CUHK), FRCSEd, HONG KONG Patrick S. H. Yung, MBChB, FRCS(Orth), FHKCOS, FHKAM, FRCS, HONG KONG
Time-Series Biological Responses Toward Decellularized Bovine Tendon Graft and Autograft for 52 Consecutive Weeks after Rat Anterior Cruciate Ligament Reconstruction ePoster Presentation Masafumi Itoh, MD, PhD, JAPAN Junya Itou, MD, PhD, JAPAN Umit Kuwa, MD, PhD, JAPAN Ken Okazaki, MD, PhD, JAPAN Kiyotaka Iwasaki, Prof, JAPAN
Comparison Outcome of Home Based Versus Supervised Physiotherapy Rehabilitation Post Anterior Cruciate Ligament (ACL) Reconstruction in Recreational Athletes : A Randomised and Single Blind Study ePoster Presentation Muhammad Rajaei Ahmad, MBBS, Master of Medicine (Orthopaedics), MALAYSIA Muzaffar Tengku Shihabudin, M.Med (Ortho), MALAYSIA
Contribution of Functional Knee Bracing to Joint Stability and Anterior Cruciate Ligament Function ePoster Presentation Sene Polamalu, BS, UNITED STATES Emre Anıl Özbek, MD, TURKEY Ehab M Nazzal, MD, UNITED STATES Gian Andrea Lucidi, MD, ITALY Andrew Sprague, PT, PhD, DPT, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES Richard E Debski, PhD, UNITED STATES
Quadriceps Autograft Is A Viable Graft Choice For ACL Reconstruction In Patients Over 50 Years Old ePoster Presentation Amit Meena, MBBS, MS, DNB, INDIA Luca Farinelli, MD, ITALY Christian Hoser, MD, AUSTRIA Elisabeth Abermann, MD, AUSTRIA Mirco Herbort, MD, Prof., GERMANY Christian Fink, MD, Prof., AUSTRIA
Factors Associated with Knee Extension Strength Symmetry Following Anterior Cruciate Ligament Reconstruction with Quadriceps Tendon Autograft ePoster Presentation Justin James Greiner, MD, UNITED STATES Nicholas P Drain, MD, UNITED STATES Joshua C Setliff, BA, UNITED STATES Romano Sebastiani, BS, UNITED STATES Zachary J Herman, MD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES Bryson P. Lesniak, MD, UNITED STATES Jonathan D Hughes, MD, PhD, UNITED STATES
Revision Anterior Cruciate Ligament Reconstruction with All Soft Tissue Quadriceps Tendon Autograft and Quadriceps Tendon Autograft with Bone Block Have Similar Clinical Outcomes ePoster Presentation Asher B Mirvish, BA, UNITED STATES Joshua C Setliff, BA, UNITED STATES Ehab M Nazzal, MD, UNITED STATES Nicholas P Drain, MD, UNITED STATES Zachary J Herman, MD, UNITED STATES Clair Smith, MSc, UNITED STATES Bryson P. Lesniak, MD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES Jonathan D Hughes, MD, PhD, UNITED STATES
Functional Results in Anterior Cruciate Ligament Reconstruction with Hybrid Grafts ePoster Presentation David H. Figueroa, MD, CHILE Maria Loreto Figueroa Berrios, MD, CHILE Alexandra Feuereisen, MD, CHILE Rafael Calvo, MD, CHILE Alex Vaisman, MD, Prof., CHILE
Transtibial Femoral Tunnel Technique In ACL Reconstruction and Osteoarthritis Incidence ePoster Presentation Marcus Vinicius Danieli, MD, PhD, BRAZIL João P.F. Guerreiro, MD, PhD, BRAZIL Joao Vitor Guedes Guedes Suzze, MD, BRAZIL Victoria de Abreu, MD, BRAZIL
Uncommonly Considered Predisposing Anatomic Risk Factor for Anterior Cruciate Ligament (ACL) Injury: Recognition and Possible Rehabilitation Potential for Prevention ePoster Presentation Mujeeb Ashraf, FRCS, MCh,FEBTS, SAUDI ARABIA Hatem Al-Harbi, FRCSC, SAUDI ARABIA
No Evidence of Racial Disparities in Revision Risk Following ACL Reconstruction in a Single Healthcare Network Despite Increased Social Disadvantage Among Black Patients ePoster Presentation Ian DeYoe Engler, MD, UNITED STATES Sahil Dadoo, BS, UNITED STATES William T. Li, MD, UNITED STATES Robert Tisherman, UNITED STATES Audrey Y. Chang, BA, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES
Mid-Term Results of Anterior Cruciate Ligament Reconstruction with Anterolateral Augmentation, Lemaire Tenodesis, in Soccer Players. Functional Results and Return to Play ePoster Presentation Pedro Alvarez-Diaz, MD, PhD, Prof., SPAIN Enrique Pavez, MD, CHILE Gilbert Steinbacher, MD, SPAIN Eduard Alentorn-Geli, MD, PhD, MSc, FEBOT, FACGME, SPAIN David Barastegui, MD, PhD, MSc, SPAIN Jorge Ramirez Haua, MD, SPAIN Maria Victoria Pomenta, MD, SPAIN Esther Sala, MD, SPAIN Sebatian Grossi, MD, SPAIN Aleix Pons Bartroli, MD , SPAIN Patricia Laiz Boada, BSc, SPAIN Ramon Cugat Bertomeu, MD, PhD, SPAIN
Low Revision Risk In Primary Anterior Cruciate Ligament Reconstruction With Allograft In The Masters Athlete ePoster Presentation Ian DeYoe Engler, MD, UNITED STATES Audrey Y. Chang, BA, UNITED STATES Janina Kaarre, MD MSc, UNITED STATES Michael Shannon, BS, UNITED STATES Andrew Curley, MD, UNITED STATES Clair Smith, MSc, UNITED STATES Jonathan D Hughes, MD, PhD, UNITED STATES Bryson P. Lesniak, MD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES
Diagnosis and Classification of Anteromedial Bundle Injury In Anterior Cruciate Ligament Injuries with a Digital Application ePoster Presentation Fernando Hernandez-Aragon, MD, MEXICO Nadia Karina Portillo Ortiz, MD, MEXICO Jose Arturo Balderrama Reynosa, Ing., MEXICO Marcela Miranda Robles, Ing., MEXICO Ivan Ramos Moctezuma, Eng, MEXICO Luis Sigala Gonzalez, Eng, MEXICO Irene Leal-Berumen, PhD, MEXICO Arturo Aguirre Madrid, MD, MEXICO Fernando González González, MD, MEXICO Edmundo Berumen Nafarrate, PhD, Prof., MEXICO
Urinary CTX-II, Serum MMP-3 And Serum PIIANP Following Anterior Cruciate Ligament Reconstruction: A Pilot Study ePoster Presentation Lachlan Batty, FRACS, AUSTRALIA Julian A. Feller, FRACS, FAOrthA, AUSTRALIA Timothy S. Whitehead, MBBS, FRACS, AUSTRALIA Brian M. Devitt, MD, PhD, FRCS, FRACS, IRELAND Kate E. Webster, PhD, AUSTRALIA
Altered Trunk Movements During Running after Anterior Cruciate Ligament Reconstruction ePoster Presentation Jodie A. McClelland, BPhysio(Hons), PhD, AUSTRALIA Julian A. Feller, FRACS, FAOrthA, AUSTRALIA Michael Maes, Md, BELGIUM Gustaf Gauffin, SWEDEN Anna Nilsson, SWEDEN Kate E. Webster, PhD, AUSTRALIA
Effectiveness of Fibrin Clot Implantation for Reduction Of Bone Tunnel Enlargement In Bundle-Bundle ACL Reconstruction Using Autogenous Hamstring Tendon Grafts ePoster Presentation Nobuyoshi Suzuki, MD, JAPAN Tomoya Iseki, MD, PhD, JAPAN Shintaro Onishi, MD, PhD, JAPAN Ryo Kanto, MD, JAPAN Hiroshi Nakayama, MD., Ph.D., JAPAN Shinichi Yoshiya, MD, JAPAN Toshiya Tachibana, MD, PhD, JAPAN
Cross-Sectional in Vivo Biomechanical Effects of Meniscus Tears in Anterior Cruciate Ligament-Deficient Knees Versus Isolated Anterior Cruciate Ligament Tears: A Systematic Review of Motion Analysis Studies ePoster Presentation Enzo Salviato Mameri, MD, MSc, BRAZIL Garrett Jackson, MD, UNITED STATES Harkirat Jawanda, BS, UNITED STATES Jonathan A Gustafson, PhD, UNITED STATES Leonardo Metsavaht, MD PhD, BRAZIL Jorge Chahla, MD, PhD, UNITED STATES

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Knee Joint Kinematics under Weight Bearing Condition in ACL Injured Knees – An Imaging Study of Upright Computed Tomography

Knee Joint Kinematics under Weight Bearing Condition in ACL Injured Knees – An Imaging Study of Upright Computed Tomography

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Knee Joint Kinematics under Weight Bearing Condition in ACL Injured Knees – An Imaging Study of Upright Computed Tomography

Knee Joint Kinematics under Weight Bearing Condition in ACL Injured Knees – An Imaging Study of Upright Computed Tomography

Methods

Results

Discussion