August Featured Author

Marie Askenberger
Marie Askenberger, MD, PhD
Section of Pediatric Orthopaedic Surgery
Karolinska University Hospital
Solna, Sweden
Department of Women’s and Children’s Health
Karolinska Institutet
Solna, Sweden

From the August issue: Operative Repair of Medial Patellofemoral Ligament Injury Versus Knee Brace in Children With an Acute First-Time Traumatic Patellar Dislocation: A Randomized Controlled Trial

Podcast: Listen to Dr. Marie Askenberger discuss her article in the August issue.


Marie Askenberger MD, PhD, is a pediatric orthopedic surgeon and senior consultant at Astrid Lindgren Childrens Hospital at the Karolinska University hospital in Stockholm.

Her primary research interest concerns pediatric knee trauma with the main focus on patellar instability in children.  Dr Askenberger received her PhD in medical science in 2017, from the Karolinska Institute.  Her thesis was “Traumautic patella dislocation in children, epidemiology, risk factors, the MPFL and treatment outcome.”

Dr Askenberger is a board member of the Swedish Pediatric Orthopaedics Quality register, a newly found and certified quality register with 5 different areas including severe acute knee trauma. She is on the board for Swedish Pediatric Orthopedics association and has recently become a member of The International Patellofemoral Study Group.

Selected Other Published Work in AJSM

Occult Intra-articular Knee Injuries in Children With Hemarthrosis. Askenberger, Marie. Ekstrom, Wilhelmina. Finnbogason, Throstur. Janarv, Per-Mats. Am J Sports Med. 2014 Apr 21;42(7):1600-1606.

Medial Patellofemoral Ligament Injuries in Children With First-Time Lateral Patellar Dislocations: A Magnetic Resonance Imaging and Arthroscopic Study. Askenberger, Marie. Arendt, Elizabeth A. Ekstrom, Wilhelmina.Voss, Ulrika. Finnbogason, Throstur. Janarv, Per-Mats. Am J Sports Med. 2016 Jan;44(1):152-8. doi: 10.1177/0363546515611661. Epub 2015 Nov 24.

Morphology and Anatomic Patellar Instability Risk Factors in First-Time Traumatic Lateral Patellar Dislocations. Askenberger, Marie. Janarv, Per-Mats. Finnbogason, Throstur. Arendt, Elizabeth A. Am J Sports Med. 2017 Jan;45(1):50-58. doi: 10.1177/0363546516663498. Epub 2016 Oct 1.

Operative Repair of Medial Patellofemoral Ligament Injury Versus Knee Brace in Children With an Acute First-Time Traumatic Patellar Dislocation: A Randomized Controlled Trial. Askenberger, Marie. Bengtsson Mostrom, Eva. Ekstrom, Wilhelmina. Arendt, Elizabeth A. Hellsten, Anna. Mikkelsen, Christina. Janarv, Per-Mats. Am J Sports Med. 2018 May 1:363546518770616. doi: 10.1177/0363546518770616.




July Featured Author

Lynn Snyder-Mackler, PT, ATC, Sc.D, SCS, FAPTA
Biomechanics and Movement Science Program
Department of Physical Therapy
University of Delaware
Newark, Delaware

From the July issue: Does Anterior Cruciate Ligament Reconstruction Improve Functional and Radiographic Outcomes Over Nonoperative Management 5 Years After Injury?

Podcast: Listen to Dr. Snyder-Mackler discuss her article in the July issue.


Dr. Lynn Snyder-Mackler, PT, ScD, ATC, SCS, FAPTA, Alumni Distinguished Professor of Physical Therapy at the University of Delaware, began her career as a clinical physical therapist, but due to her persistent curiosity and interest in finding answers to questions, she quickly found her passion in the research side of the profession. Dr. Snyder-Mackler’s persistence has surely paid off, as she recently received a prestigious Method to Extend Research in Time (MERIT) Award from the National Institutes of Health (NIH). This award will fund her research on anterior cruciate ligament (ACL) injuries for up to ten years so that Dr. Snyder-Mackler can continue feeding her curiosity and finding answers to the many unanswered questions that she has.

Dr. Snyder-Mackler received two grants from the Foundation during the early years of her career that helped to secure the course of her research and brought her to where she is today. The first, a Doctoral Training Research Grant in 1988, funded a small randomized trial during Dr. Snyder-Mackler’s PhD studies at Boston University. This project was one of her first forays into research and it helped her to learn the basics of this type of work. The second grant, a research grant in 1991, funded a study entitled, “Comparison of Electrical Stimulation and Voluntary Exercise in Patients after ACL Surgery.” Over the years, this project continued to grow, and it is this research that eventually turned into the project for which she received the NIH MERIT award.

Dr. Snyder-Mackler’s current research focuses on how people respond differently to ACL injuries. Some people, who Snyder-Mackler calls “copers,” have the ability to stabilize themselves after an ACL injury by participating in rehabilitation, while for others, surgery may be necessary to repair the injury. By delaying surgery, those identified as copers are able to regain knee stability through neuromuscular training with a physical therapist. Her research focuses on determining how to identify these copers and how to rehabilitate them in order to make it less likely that they re-injure themselves. The study is set up as a long-term cohort and is being done simultaneously in Norway and the United States.

Selected Other Published Work in AJSM

Wellsandt E, Failla MJ, Axe MJ, Snyder- Mackler L. Does Anterior Cruciate Ligament Reconstruction Improve Functional and Radiographic Outcomes Over Nonoperative Management 5 Years After Injury? AM J Sports Med. 2018, Jun

Arundale AJH, Capin JJ, Zarzycki R, Smith A, Snyder-Mackler L. Functional and Patient-Reported Outcomes Improve Over the Course of Rehabilitation: A Secondary Analysis of the ACL-SPORTS Trial. AM J Sports Med. 2018, Jun

Grindem H, Wellsandt E, Failla M, Synder-Mackler L, Risberg MA. Anterior Cruciate Ligament Injury—Who Succeeds Without Reconstructive Surgery? The Delaware-Oslo ACL Cohort Study. Ortho J Sports Med. 2018, May; 6 (5)

Arundale AJH, Silvers-Granelli HJ, Snyder- Mackler L. Career Length and Injury Incidence After Anterior Cruciate Ligament Reconstruction in Major League Soccer Players. Ortho J Sports Med. 2018, Jan; 6 (1)

Zarzycki R, Failla M, Arundale AJH, Capin JJ, Snyder-Mackler L. Athletes with a Positive Psychological Response to Return to Sport Training Have Better Outcomes One and Two Years after ACL Reconstruction. Ortho J Sports Med. 2017, Jul; 5 (7_suppl)

Failla M, Zarzycki R, Logerstedt, Wellsandt E, Axe MJ, Snyder-Mackler L. Hop Test Symmetry Scores Early after Rehab Predict Successful 2 Year Outcomes of ACLR. Ortho J Sports Med. 2017, Jul; 5 (7_suppl)

Suydam SM,. Cortes DH, Axe MJ, Snyder-Mackler L, Buchanan TS. Semitendinosus Tendon for ACL Reconstruction: Regrowth and Mechanical Property Recovery. Ortho J Sports Med. 2017, Jun; 5 (6)

Nawasreh Z, Logerstedt D, Cummer K, Axe MJ, Risberg MA, Snyder-Mackler L. Do Patients Failing Return-to-Activity Criteria at 6 Months After Anterior Cruciate Ligament Reconstruction Continue Demonstrating Deficits at 2 Years? AM J Sports Med. 2016, Dec; 45 (5)

Failla MJ, Logerstedt DS, Grindem H, Axe MJ, Risberg MA, Engebretsen L, Huston L, Spindler KP, Snyder-Mackler L. Does Extended Preoperative Rehabilitation Influence Outcomes 2 Years After ACL Reconstruction? AM J Sports Med. 2016, Jul; 44 (10)

Zachazewski J, Silvers HJ, Li B, Snyder-Mackler L, Insler S,. Ahmad CS, Mandelbaum B. Hamstring Injuries in Major and Minor League Baseball. Ortho J Sports Med. 2016, Jul; 4 (7_suppl)

June Featured Author

Louis DeFrate, PhD

Associate Professor of Orthopaedic Surgery
Duke University
Durham, North Carolina

From the June issue: Determination of the Position of the Knee at the Time of an Anterior Cruciate Ligament Rupture for Male Versus Female Patients by an Analysis of Bone Bruises

Podcast: Listen to Dr. DeFrate discuss his article in the June issue.


Dr. DeFrate is the Frank H. Bassett III, M.D. Associate Professor of Orthopaedic Surgery at Duke University. He also holds appointments in the Department of Mechanical Engineering and Materials Science and the Department of Biomedical Engineering.

Dr. DeFrate’s research focuses on the application of engineering principles to investigate clinically relevant problems related to the musculoskeletal system. Dr. DeFrate has published widely on the use of MR imaging and biplanar radiography to measure in vivo joint function and cartilage loading in normal subjects as well as those at high risk for the development of osteoarthritis. Dr. DeFrate has also used these techniques to quantify in vivo ligament and tendon deformation.

Additionally, he has recently developed a new “stress test” of the knee for evaluating changes in the mechanical response to activities of daily living. By combining these approaches with MRI sequences that non-invasively quantify tissue composition as well as local and systemic biomarkers of tissue metabolism, innovative analyses of joint health can be performed. Using this approach, Dr. DeFrate has led a number of clinical research projects at Duke University Medical Center, including several NIH grants related to cartilage degeneration after ligament injury and ACL injury mechanisms. His work in this area has recently been acknowledged by the 2016 Kappa Delta Young Investigator Award from the American Academy of Orthopaedic Surgeons (AAOS) and the Orthopaedic Research Society (ORS).

Selected Other Published Work in AJSM

Owusu-Akyaw KA, Kim SY, Spritzer CE, Collins AT, Englander ZA, Utturkar GM, Garrett WE, DeFrate LE. Determination of the Position of the Knee at the Time of an Anterior Cruciate Ligament Rupture for Male Versus Female Patients by an Analysis of Bone Bruises. Am J Sports Med. 2018. In press.

Liu B, Lad NK, Collins AT, Ganapathy PK, Utturkar GM, McNulty AL, Spritzer CE, Moorman CT 3rd, Sutter EG, Garrett WE, DeFrate LE. In Vivo Tibial Cartilage Strains in Regions of Cartilage-to-Cartilage Contact and Cartilage-to-Meniscus Contact in Response to Walking. Am J Sports Med. 2017 Oct;45(12):2817-2823.

Kim SY, Spritzer CE, Utturkar GM, Toth AP, Garrett WE, DeFrate LE. Knee Kinematics During Noncontact Anterior Cruciate Ligament Injury as Determined From Bone Bruise Location. Am J Sports Med. 2015 Oct;43(10):2515-21.

Sutter EG, Widmyer MR, Utturkar GM, Spritzer CE, Garrett WE Jr, DeFrate LE. In vivo measurement of localized tibiofemoral cartilage strains in response to dynamic activity. Am J Sports Med. 2015 Feb;43(2):370-6.

Wainright WB, Spritzer CE, Lee JY, Easley ME, DeOrio JK, Nunley JA, DeFrate LE. The effect of modified Broström-Gould repair for lateral ankle instability on in vivo tibiotalar kinematics. Am J Sports Med. 2012 Sep;40(9):2099-104.

Caputo AM, Lee JY, Spritzer CE, Easley ME, DeOrio JK, Nunley JA 2nd, DeFrate LE. In vivo kinematics of the tibiotalar joint after lateral ankle instability. Am J Sports Med. 2009 Nov;37(11):2241-8.

Abebe ES, Moorman CT 3rd, Dziedzic TS, Spritzer CE, Cothran RL, Taylor DC, Garrett WE Jr, DeFrate LE. Femoral tunnel placement during anterior cruciate ligament reconstruction: an in vivo imaging analysis comparing transtibial and 2-incision tibial tunnel-independent techniques. Am J Sports Med. 2009 Oct;37(10):1904-11.

Van de Velde SK, Gill TJ, DeFrate LE, Papannagari R, Li G. The effect of anterior cruciate ligament deficiency and reconstruction on the patellofemoral joint. Am J Sports Med. 2008 Jun;36(6):1150-9.

Jordan SS, DeFrate LE, Nha KW, Papannagari R, Gill TJ, Li G. The in vivo kinematics of the anteromedial and posterolateral bundles of the anterior cruciate ligament during weightbearing knee flexion. Am J Sports Med. 2007 Apr;35(4):547-54.

DeFrate LE, Papannagari R, Gill TJ, Moses JM, Pathare NP, Li G. The 6 degrees of freedom kinematics of the knee after anterior cruciate ligament deficiency: an in vivo imaging analysis. Am J Sports Med. 2006 Aug;34(8):1240-6.

May Featured Author

Mats Brittberg, MD, PhD

Cartilage Research Unit
Institute of Clinical Sciences
University of Gothenburg
Gothenburg, Sweden

From the May issue: Matrix-Applied Characterized Autologous Cultured Chondrocytes Versus Microfracture: Five-Year Follow-up of a Prospective Randomized Trial

Podcast: Listen to Dr. Brittberg discuss his article in the May issue.


Mats Brittberg is a member of the Cartilage Research Unit at University of Gothenburg and an orthopedic surgeon at Region Halland Orthopaedics at the Kungsbacka Hospital, Kungsbacka, Sweden.  He received his MD at the University of Gothenburg in 1978 and completed a specialization in orthopedics in 1985.  In 1992 he passed the Swedish Orthopedic Board Exam (S.O.B.E.), and in 1996 he earned a PhD. He is now a professor of orthopaedics connected to the Institution of clinical sciences and orthopaedic department, University of Gothenburg.

Mats Brittberg’s research has been focused on cartilage repair and with main focus on cartilage regeneration with in vitro expanded autologous chondrocytes. Another  interest is the European Connective Tissue Engineering centre (ECTEC), which is research collaboration between the Sahlgrenska Academy at University of Gothenburg with the institution of Polymer Technology, Chalmers Technical University. Mats Brittberg has also had research collaboration with Virginia Tech in USA on biotribology in cartilage and osteoarthritis as well as research collaborations with other centers in Europe and North America.

Mats Brittberg is also co-director of the cartilage program and cartilage centre at Aspetar Orthopaedic and Sports medicine Hospital, Doha, Qatar.

In September, 2010, Mats Brittberg received the ICRS Genzyme Lifetime Achievement Award in cartilage research and in 2012, the Shetty- Kim Foundation (SKF) Scientific award. In 2014, Mats Brittberg also received the SKF and UK Cartilage Club’s Life time achievement Award.

Mats Brittberg has been on the board of TESi (Tissue engineering Society International) and has been chairing the Cartilage Committee of ESSKA 2006-08. Since the start 1997, he has been working with ICRS, as a secretary, Vice-president and President (2006-2008) and finally Past-President (2008-2009). He is since January 2013  Editor-in-Chief for the SAGE journal CARTILAGE. He has also been associate editor with ESSKA journal as well as being on the editorial board of Osteoarthritis and Cartilage. Mats Brittberg is also involved in the Go:Life platform for scientific meetings in Gothenburg and clinical adviser to several cartilage repair companies.

Selected Other Published Work in AJSM

Peterson L, Brittberg M, Kiviranta I, Akerlund EL, Lindahl A. Autologous chondrocyte transplantation. Biomechanics and long-term durability. Am J Sports Med. 2002 Jan-Feb;30(1):2-12.

Brittberg M. Cell carriers as the next generation of cell therapy for cartilage repair: a review of the matrix-induced autologous chondrocyte implantation procedure. Am J Sports Med. 2010 Jun;38(6):1259-71.

Peterson L, Vasiliadis HS, Brittberg M, Lindahl A. Autologous chondrocyte implantation: a long-term follow-up. Am J Sports Med. 2010 Jun;38(6):1117-24

de Windt TS, Welsch GH, Brittberg M, Vonk LA, Marlovits S, Trattnig S, Saris DB. Is magnetic resonance imaging reliable in predicting clinical outcome after articular cartilage repair of the knee? A systematic review and meta-analysis. Am J Sports Med. 2013 Jul;41(7):1695-702

de Windt TS, Welsch GH, Brittberg M, Vonk L, Marlovits S, Trattnig S, Saris DB, Blackman AJ, Smith MV, Flanigan DC, Matava MJ, Wright RW, Brophy RH. Correlation between magnetic resonance imaging and clinical outcomes after knee cartilage repair: letter to the editor. Am J Sports Med. 2013 Nov;41(11)

Saris D, Price A, Widuchowski W, Bertrand-Marchand M, Caron J, Drogset JO, Emans P, Podskubka A, Tsuchida A, Kili S, Levine D, Brittberg M; SUMMIT study group. Matrix-Applied Characterized Autologous Cultured Chondrocytes Versus Microfracture: Two-Year Follow-up of a Prospective Randomized Trial. Am J Sports Med. 2014 Jun;42(6):1384-94

Brittberg M, Recker D, Ilgenfritz J, Saris DBF; SUMMIT Extension Study Group. Matrix-Applied Characterized Autologous Cultured Chondrocytes Versus Microfracture: Five-Year Follow-up of a Prospective Randomized Trial. Am J Sports Med. 2018 Mar 1:363546518756976.

April Featured Author

Brian J. Cole, MD, MBA

Associate Chairman and Professor, Department of Orthopedics, Rush
Chairman, Department of Surgery, Rush OPH
Shoulder, Elbow, and Knee Surgery
Section Head, Cartilage Restoration Center at Rush
Team Physician Chicago Bulls and Chicago White Sox
Rush University Medical Center
Chicago, Illinois

From the April issue: Preoperative Tibial Subchondral Bone Marrow Lesion Patterns and Associations With Outcomes After Isolated Meniscus Allograft Transplantation

Podcast: Listen to Dr. Cole discuss his article in the April issue.


Dr. Cole is a Professor in the Department of Orthopedics with a conjoint appointment in the Department of Anatomy and Cell Biology at Rush University Medical Center in Chicago, Illinois. In 2015, he was appointed as an Associate-Chairman of the Department of Orthopedics at Rush. In 2011, he was appointed as Chairman of Surgery at Rush Oak Park Hospital. He is the Section Head of the Cartilage Research and Restoration Center at Rush specializing in the treatment of arthritis in young active patients with a focus on regenerative medicine and biologic alternatives to surgery.  He also serves as the head of the Orthopedic Master’s Training Program and trains residents and fellows in sports medicine and research. He lectures nationally and internationally and holds several leadership positions in prominent sports medicine societies. Through his basic science and clinical research, he has developed several innovative techniques for the treatment of shoulder, elbow, and knee conditions. He has published more than 1,000 articles and 10 widely read textbooks in orthopedics and regenerative medicine.

Dr. Cole has been frequently chosen as one of the “Best Doctors in America” since 2004 and as a “Top Doctor” in the Chicago metro area since 2003. In 2006, he was featured on the cover of Chicago Magazine as “Chicago’s Top Doctor” and was selected as NBA Team Physician of the Year in 2009. Orthopedics This Week has named Dr. Cole as one of the top 20 sports medicine, knee, and shoulder specialists repeatedly over the last 5 years as selected by his peers. He is the head team physician for the Chicago Bulls NBA team, co-team physician for the Chicago White Sox MLB team and DePaul University in Chicago.

Selected Other Published Work in AJSM

Cole BJ, Karas V, Hussey K, Merkow D, Pilz K, Fortier, LA. Hyaluronic Acid Versus Platelet-Rich Plasma: A Prospective, Double-Blind Randomized Controlled Trial Comparing Clinical Outcomes and Effects on Intra-articular Biology for the Treatment of Knee Osteoarthritis. Am J Sports Med. 2016 Oct; 45 (2): 339-46.

Saltzman BM, Leroux T, Meyer MA, Basques BA, Chahal J, Bach BR, Yanke AB, Cole BJThe Therapeutic Effect of Intra-Articular Normal Saline Injections for Knee Osteoarthritis: A Meta-Analysis of Evidence Level 1 StudiesAm J Sports Med. 2016 Nov.

Riboh JC, Saltzman BM, Yanke AB, Cole BJHuman amniotic membrane-derived products in sports medicine:  Basic science, early results and potential clinical applicationsAm J Sports Med, 2016 Sep; 44 (9): 2425-34.

Padaki AS, Cole BJ, Ahmad CS. Concussion Incidence and Return-to-Play Time in National Basketball Association Players: Results from 2006 to 2014Am J Sports Med. 2016 Sep; 44 (9): 2263-8.

Cole BJ, Karas V, Hussey K, Pilz K, Fortier LA. Hyaluronic Acid Versus Platelet-Rich Plasma: A Prospective, Double-Blind Randomized Controlled Trial Comparing Clinical Outcomes and Effects on Intra-articular Biology for the Treatment of Knee OsteoarthritisAm J Sports Med. 2016 Sep.

Leroux TS, Saltzman BM, Meyer M, Frank RM, Bach BR Jr, Cole BJ, Romeo AA, Verma NN. The Influence of Evidence-Based Surgical Indications and Techniques on Failure Rates After Arthroscopic Shoulder Stabilization in the Contact or Collision Athlete With Anterior Shoulder InstabilityAm J Sports Med. 2016 Aug.

Getgood A, LaPrade RF, Verdonk P, Gersoff W, Cole BJ, Spalding T; IMREF Group. International Meniscus Reconstruction Experts Forum (IMREF) 2015 Consensus Statement on the Practice of Meniscal Allograft TransplantationAm J Sports Med. 2016 Aug.

Cvetanovich GL, Riboh JC, Tilton AK, Cole BJAutologous Chondrocyte Implantation Improves Knee-Specific Functional Outcomes and Health-Related Quality of Life in Adolescent PatientsAm J Sports Med. 2016 Aug.

MARS Multicenter Group. Meniscal and Articular Cartilage Predictors of Clinical Outcome After Revision Anterior Cruciate Ligament ReconstructionAm J Sports Med. 2016 Jul.

Makhni EC, Saltzman BM, Meyer MA, Moutzouros V, Cole BJ, Romeo AA, Verma NN. Outcomes After Shoulder and Elbow Injury in Baseball Players: Are We Reporting What Matters? Am J Sports Med. 2016 Apr.

Cvetanovich GL, Chalmers PN, Verma NN, Cole BJ, Bach BR. Risk Factors for Short-term Complications of Anterior Cruciate Ligament Reconstruction in the United StatesAm J Sports Med. 2016 Jan.

March Featured Author

Yoo_Jae Chul
Jae Chul Yoo, MD
Department of Orthopedic Surgery
Sungkyunkwan University, School of Medicine
Samsung Medical Center
Seoul, Korea

From the March issue: Location of Rotator Cuff Tear Initiation: A Magnetic Resonance Imaging Study of 191 Shoulders

Podcast: Listen to Dr. Yoo discuss his article in the March issue.


Jae Chul Yoo, MD is a Professor in the Department of Orthopedic Surgery at Sungkyunkwan University, School of Medicine, Samsung Medical Center in Seoul, Korea. He also serves on the editorial board for Arthroscopy: The Journal of Arthroscopic and Related Surgery, is a reviewer for The American Journal of Sports Medicine and Journal of Shoulder and Elbow Surgery, and is the Secretary General for the Korean Shoulder and Elbow Society.

He is a member, subspecialist, and/or board member of several societies including: Korea Orthopedic Association (KOA); Korean Sports Medicine Association; Korean Shoulder and Elbow Society (KSES); Korean Arthroscopy Association (KAA); International Society of Arthroscopy, Knee Surgery, and Orthopaedic Sports Medicine (ISAKOS); Korean Orthopedic Sport Medicine Association (KOSMA); European Society of Sport traumatology Knee Surgery and Arthroscopy (ESSKA); Arthroscopy Association of North America (AANA); Magellan Society; Korean Orthopedic Ultrasonography Association; American Shoulder Elbow Society (ASES); and European Shoulder & Elbow Society (SECEC).

Selected Published Work

Evaluation of the Risk Factors for a Rotator Cuff Retear After Repair Surgery. Lee YS, Jeong JY, Park CD, Kang SG, Yoo JC. Am J Sports Med. 2017 Jul;45(8):1755-1761. doi: 10.1177/0363546517695234. Epub 2017 Mar 20. PMID: 28319431

Reversibility of Supraspinatus Muscle Atrophy in Tendon-Bone Healing After Arthroscopic Rotator Cuff Repair. Park YB, Ryu HY, Hong JH, Ko YH, Yoo JC. Am J Sports Med. 2016 Apr;44(4):981-8. doi: 10.1177/0363546515625211. Epub 2016 Feb 10. PMID: 26865396

Arthroscopic Partial Repair of Irreparable Rotator Cuff Tears: Preoperative Factors Associated With Outcome Deterioration Over 2 Years. Shon MS, Koh KH, Lim TK, Kim WJ, Kim KC, Yoo JC. Am J Sports Med 2015 43: 1965. originally published online May 26, 2015.

Arthroscopic distal clavicle resection in symptomatic acromioclavicular joint arthritis combined with rotator cuff tear: a prospective randomized trial. Park YB, Koh KH, Shon MS, Park YE, Yoo JC. Am J Sports Med. 2015 Apr;43(4):985-90. doi: 10.1177/0363546514563911. Epub 2015 Jan 12.

Preoperative factors affecting footprint coverage in rotator cuff repair. Koh KH, Lim TK, Park YE, Lee SW, Park WH, Yoo JC. Am J Sports Med. 2014 Apr;42(4):869-76. doi: 10.1177/0363546513518581. Epub 2014 Feb 4.

A Magnetic Resonance Imaging Study of 100 Cases of Arthroscopic Acromioplasty. Koh KH, Laddha MS, Lim TK, Lee JH, Yoo JC. Am J Sports Med. 2012 Feb;40(2):352-8. Epub 2011 Nov 17

Patient-related factors and complications after arthroscopic tenotomy of the long head of the biceps tendon. Lim TK, Moon ES, Koh KH, Yoo JC. Am J Sports Med. 2011 Apr; 39(4):783-9. Epub 2011 Jan 6.

Clinical and Magnetic Resonance Imaging Results of Arthroscopic Full-Layer Repair of Bursal-Side Partial-Thickness Rotator Cuff Tears. Koh KH, Shon MS, Lim TK, Yoo JC. Am J Sports Med. 2011 Aug;39(8):1660-7. Epub 2011 Jul 7. PMID: 21737830

Patient-Related Factors and Complications After Arthroscopic Tenotomy of the Long Head of the Biceps Tendon. Tae Kang Lim, MD, Eun Sun Moon,y MD, Kyoung Hwan Koh, MD, and Jae Chul Yoo, MD. Am J Sports Med. Vol. 39, No. 4, 2011.

Treatment of Biceps Tendon Lesions in the Setting of Rotator Cuff Tears Prospective Cohort Study of Tenotomy Versus Tenodesis. Kyoung Hwan Koh,MD, Jae Chul Yoo, MD, Jin Hwan Ahn, MD, and Sang Min Kim, MD. Am J Sports Med. 2010 Aug;38(8):1584-90.PMID: 20551285

Clinical Results of Single-Tunnel Coracoclavicular Ligament Reconstruction Using Autogenous Semitendinosus Tendon. Jae-Chul Yoo, Jin-Hwan Ahn, Jung-Ro Yoon and Jae-Hyuk Yang. Am J Sports Med 2010 38

Increasing Incidence of Medial Meniscal Tears in Nonoperatively Treated Anterior Cruciate Ligament Insufficiency Patients Documented by Serial Magnetic Resonance Imaging Studies. Jae Chul Yoo, MD, Jin Hwan Ahn, MD, Sang Hak Lee, MD, and Young Cheol Yoon, MD. Am J Sports Med Vol. 37, No. 8, 2009

Magnetic Resonance Image appearance of a repaired capsulolabral complex after arthroscopic Bankart repair. Jae Chul Yoo, M.D., Yong Seuk Lee, M.D., Suk Kee Tae, M.D., Jung Ho Park, M.D., Jong Woong Park, M.D., Hae Chan Ha, M.D. Am J Sports Med, Vol. 36, No. 12 2008

February Featured Author

Aaron J. Krych, MD
Program Director, Sports Medicine Fellowship
Program Director, Sports Medicine Research Fellowship
Mayo Clinic Orthopedic Surgery and Sports Medicine
Rochester, MN

From the February issue: Multicenter Analysis of Midterm Clinical Outcomes of Arthroscopic Labral Repair in the Hip: Minimum 5-Year Follow-up

Podcast: Listen to Dr. Krych discuss his article in the February issue.


Aaron Krych is Professor of Orthopedic Surgery and Sports Medicine at the Mayo Clinic in Rochester, MN, USA. He is also Director of the Orthopedic Surgery Sports Medicine Fellowship and Orthopedic Surgery Sports Medicine Research Fellowship.

He received his MD and Orthopedic Surgery Residency training at Mayo Clinic. He completed his sports fellowship training at Hospital for Special Surgery in New York in 2010. He was an ICRS Travelling Fellow in 2013. His clinical focus has been on cartilage restoration in the hip and knee, and knee osteotomy and meniscus transplant. His research interests include improving cartilage allograft, adipose-derived MSC injection for hip and knee arthritis, meniscus repair, and single stage cell-based cartilage repair.

Selected Published Work

Melugin H, Wu IT, Levy BA, Stuart MJ, Krych AJIs Treatment of Segond Fracture Necessary with Combined ACL Reconstruction?  Am J Sports Med. 2017 Dec 1:363546517745280. doi: 10.1177/0363546517745280. [Epub ahead of print] PMID: 29286825

Schilaty ND, Nagelli C, Bates NA, Sanders TL, Krych AJ, Stuart MJ, Hewett TE. Incidence of Second Anterior Cruciate Ligament Tears (2001 – 2010) and Associate Factors by Geographic LocaleOrthop J Sports Med. 2017 Aug 18;5(8):2325967117724196. doi: 10.1177/2325967117724196. eCollection 2017 Aug. PMID:28840155

Sanders TL, Christensen TC, Johnson NR, Hewett TE, Stuart MJ, Dahm DL, Krych AJIncidence of Acute Lateral Patellar Dislocation: A 21-Year Population-Based Study.  Sports Health. 2017 Aug 1:1941738117725055. doi: 10.1177/1941738117725055. [Epub ahead of print] PMID: 28795924

Schilaty ND, Bates NA, Sanders TL, Krych AJ, Stuart MJ, Hewett TE. Incidence of Second Anterior Cruciate Ligament Tears (1990 – 2000) and Associate Factors by Geographic LocaleAm J Sports Med. 2017 Jun; 45 (7):1567-1573. 2017 Mar 1:363546517694026. doi: 10.1177/0363546517694026. [Epub ahead of print] PMID: 28298067

Christensen TC, Sanders TL, Pareek A, Mohan R, Dahm DL, Krych AJRisk Factors and Time to Recurrent Ipsilateral and Contralateral Patellar Dislocation: A Population-Based Study.  Am J Sports Med. 2017 May 1:363546517704178. doi: 10.1177/0363546517704178. [Epub ahead of print] PMID:28463535.

Sanders TL, Pareek A, Obey MR, Johnson NR, Carey JL, Stuart MJ, Krych AJHigh Rate of Osteoarthritis following OCD Fragment Excision Compared to Surgical Restoration at a Mean 16-Year Follow-UpAm J Sports Med. 2017 Apr 1:363546517699846. doi: 10.1177/0363546517699846. [Epub ahead of print] PMID: 28419816

Amano K, Li A, Pedoia V, Krych AJ, Rodeo S, Li X, Ma CB, Majumdar S, AF-ACL Consortium. Surgical timing is related to changes seen in cartilage matrix composition after ACL reconstructionAm J Sports Med. 2017 Apr;45(5):1075-1084. doi: 10.1177/0363546516677794. Epub 2017 Jan 27. PMID: 28768432

Sanders TL, Pareek A, Johnson NR, Stuart MJ, Dahm DL, Krych AJPatellofemoral Arthritis after Lateral Patellar Dislocation: A Population-Based AnalysisAm J Sports Med. 2017 Apr;45(5):1012-1017. doi: 10.1177/0363546516680604 PMID: 28005405

Bryan AJ, Krych AJ, Pareek A, Reardon PJ, Berardelli R, Levy BA. Are Short-term Outcomes of Hip Arthroscopy in Patients Older than 55 Years Inferior to Younger Patients? Am J Sports Med 2016 Oct; 44 (10):2526-2530. pii: 0363546516652114. [Epub ahead of print] PMID: 27416992

Allen MM, Pareek A, Krych AJ, Hewett TE, Levy BA, Stuart MJ, Dahm DL. Are Female Soccer Players At An Increased Risk of Second Anterior Cruciate Ligament Injury Compared to Their Athletic Peers? Am J Sports Med 2016 Oct; 44 (10):2492-2498. pii: 0363546516648439. [Epub ahead of print] PMID: 27261476

Sanders T, Maradit Kremers H, Bryan A, Fruth K, Larson DR, Levy BA, Stuart MJ, Dahm DL, Krych AJ. Is ACL reconstruction effective in preventing secondary meniscal tears and osteoarthritis? Am J Sports Med 2016 Jul; 44 (7):1699-707. pii: 0363546516634325. [Epub ahead of print] PMID:26957217

Sanders T, Maradit Kremers H, Bryan A, Kremers WK, Levy BA, Dahm DL, Stuart MJ, Krych AJ. Incidence of and Factors Associated with the Decision to Undergo ACL Reconstruction One to Ten Years After InjuryAm J Sports Med. 2016 Jun;44(6):1558-64. doi: 10.1177/0363546516630751 PMID: 26928338

Sanders T, Maradit Kremers H, Bryan AJ, Larson DR, Dahm DL, Levy BA, Stuart MJ, Krych AJ. Incidence of anterior cruciate ligament tears and reconstruction: A 21 year population-based studyAm J Sports Med. 2016 Jun;44(6):1502-7. doi: 10.1177/0363546516629944 PMID: 26920430

Krych AJ, King AH, Bererdelli RL, Sousa PL, Levy BA. Is MRI Subchondral Edema with Cystic Change a contraindication for hip arthroscopy in patients with FAI?  Am J Sports Med. 2016 Feb;44(2):454-9. doi: 10.1177/0363546515612448. PMID:26620297

Krych AJ, Nawabi DH, Jones K, Farshad-Amacker NA, Maak TG, Potter HP, Williams, RJ, III. Bone Marrow Concentrate lmproves Early Scaffold Plug Cartilage Phase Maturation: A Comparative MRI AnalysisAm J Sports Med. 2016 Jan;44(1):91-8. PMID: 26574602

CL Camp, MJ Heidenreich, DL Dahm, MJ Stuart, BA Levy, Krych AJIndividualizing the Tibial Tubercle to Trochlear Groove Distance: Patellar Instability Ratios That Predict Recurrent Instability.  Am J Sports Med. 2016 Feb;44(2):393-9. doi: 10.1177/0363546515602483 PMID: 26394888

Christensen J, Krych AJ, Engasser W, Vanhees M, Collins MS, Dahm DL. Lateral tibial slope is increased with patients with early graft failure following ACL reconstruction.  Am J Sports Med. 2015 Oct;43(10):2510-4. PMID: 26320223

Krych AJ, Pitts RT, Dajani KA, Stuart MJ, Dahm DL, Levy BA. Surgical treatment of meniscal tears associated with anterior cruciate ligament reconstruction in pediatric patients.  Am J Sports Med. 2010 May;38(5):976-82.

Krych AJ, McIntosh AL, Voll AE, Stuart MJ, Dahm DL. Arthroscopic repair of isolated meniscal tears in patients 18 years and younger Am J Sports Med. 2008 Jul;36(7):1283-9