Hamstring tendon autograft (HTA) is a common graft choice for anterior cruciate ligament (ACL) reconstructions in skeletally immature patients. However, quadriceps tendon autografts (QTA) have recently shown superior preliminary outcomes in this population. The purpose of this study was to evaluate graft maturity by comparing MRI signal intensity of HTA and QTA used in primary ACL reconstruction. Given the promising preliminary results of QTA reconstructions in our center, we hypothesized that QTA would have lower signal than HTA at both 6 and 12 months.

Methods

Patients under the age of 18 who underwent a primary ACL reconstruction between 2011 and 2018 by the senior authors using either a HTA or QTA with available MRIs at 6 and 12 months post-operatively were included. Signal intensity ratio (SIR) was measured on sagittal MRI by averaging the signal at three regions of interest (ROIs) along the ACL graft and dividing each by the signal of the tibial footprint of the PCL. Statistical analysis was performed to determine interrater reliability and differences between time points and groups.

Results

71 patients (38 in the HTA group and 33 in the QTA group) were reviewed retrospectively. Age, sex, and type of surgery were not different between groups. There was no significant difference in SIR between groups on the 6-month MRI. At 12 months, SIR of the QTA group was significantly less that in the HTA group (p=.029). Within the HTA group, there was no significant difference in SIR between time points. In the QTA group, there was a significant decrease in SIR between the 6 month and 12-month post-operative MRI (p=.045).

Conclusion

The decrease in signal between 6 and 12 months post-operatively suggests quicker graft maturation and improved structural integrity of QTA as compared to HTA.

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

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Quadriceps Tendon Autograft Has Lower MRI Signal Than Hamstring Tendon Autograft In Anterior Cruciate Ligament Reconstructions Of Adolescent Athletes

Quadriceps Tendon Autograft Has Lower MRI Signal Than Hamstring Tendon Autograft In Anterior Cruciate Ligament Reconstructions Of Adolescent Athletes

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Quadriceps Tendon Autograft Has Lower MRI Signal Than Hamstring Tendon Autograft In Anterior Cruciate Ligament Reconstructions Of Adolescent Athletes

Quadriceps Tendon Autograft Has Lower MRI Signal Than Hamstring Tendon Autograft In Anterior Cruciate Ligament Reconstructions Of Adolescent Athletes

Purpose

Methods

Results

Conclusion

More ISAKOS 2021: Global Content