April Featured Author

Timothy S. Leroux, MD
Assistant Professor, Department of Surgery
University of Toronto
Orthopaedic Surgeon, Division of Orthopaedic Surgery
University Health Network
Member, University of Toronto Orthopaedic Sports Medicine (UTOSM) Program
Toronto, Canada


From the April issue: Elective Shoulder Surgery in the Opioid Naïve: Rates of and Risk Factors for Long-term Postoperative Opioid Use

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


Dr. Timothy Leroux completed medical school and orthopaedic surgery residency at the University of Toronto.  During residency, he participated in the Surgeon Scientist Training Program (SSTP) at the University of Toronto, where he obtained a Master of Education (MEd) degree.  Following residency training, he pursued a fellowship in orthopaedic sports medicine and upper extremity reconstruction at Midwest Orthopaedics at Rush in Chicago, Illinois.  Following fellowship, he joined the Division of Orthopaedic Surgery at the University Health Network in Toronto, Canada.  He is currently an Assistant Professor in the Department of Surgery at the University of Toronto and a member of the University of Toronto Orthopaedic Sports Medicine (UTOSM) Program.  His clinical practice revolves around the management of shoulder and elbow pathology, and his current research interests include clinical epidemiology, pain management and health care utilization following orthopaedic surgery, and surgical education.

Selected Other Published Work

Leroux, T., Saltzman, B., Meyer, M., Frank, R., Bach, B., Cole, B., Romeo, A., Verma, N.  The Influence of Evidence-Based Surgical Indications and Techniques on Failure Rates Following Arthroscopic Shoulder Stabilization in the Contact or Collision Athlete with Anterior Shoulder Instability.  American Journal of Sports Medicine 2016; 45(5): 1218-1225

Leroux, T., Ogilvie-Harris, D., Veillette, C., Chahal, J., Dwyer, T., Khoshbin, A., Henry, P., Mahomed, N., Wasserstein, D. The Epidemiology of Primary Anterior Shoulder Dislocation in Patients Aged 10-16 Years. American Journal of Sports Medicine 2015; 43(9): 2111-7.

Leroux, T., Wasserstein, D., Dwyer, T., Ogilvie-Harris, D., Marks, P., Bach, B., Townley, J., Mahomed, N., Chahal, J. The Epidemiology of Revision Anterior Cruciate Ligament Reconstruction in Adults from Ontario, Canada.  American Journal of Sports Medicine 2014; 42(11): 2666-2672.

Leroux, T., Wasserstein, D., Veillette, C., Khoshbin, A., Henry, P., Chahal, J., Austin, P., Mahomed, N., Ogilvie-Harris, D.  The Epidemiology of Primary Anterior Shoulder Dislocation in Ontario, Canada. American Journal of Sports Medicine 2014; 42(2): 442-450.

Saltzman, B., Leroux, T., Meyer, M., Basques, B., Bach, B., Chahal, J., Yanke, A., Cole, B. The Therapeutic Effect of Intra-articular Normal Saline Injections for Knee Osteoarthritis. American Journal of Sports Medicine 2017; 45(11): 2647-2653.

Zuke, W., Leroux, T., Gregory, B., Black, A., Forsythe, B., Romeo, A., Verma, N.  Establishing Maximal Medical Improvement After Arthroscopic Rotator Cuff Repair. American Journal of Sports Medicine 2018; 46(4): 1000-1007.

Frank, R., Meyer, M., Poland, S., Leroux, T., Hannon, C., Verma, N., Romeo, A., Cole, B.  Long-Term Clinical Outcomes After Microfracture of the Glenohumeral Joint: Average 10-year Follow-up.  American Journal of Sports Medicine 2018; 46(4): 786-794.



March Featured Author

Philip Moroder, MD
Head of the Department for Shoulder and Elbow Surgery,
Charitè University Hospital
Berlin, Germany

From the March issue: Challenging the Current Concept of Critical Glenoid Bone Loss in Shoulder Instability: Does the Size Measurement Really Tell It All?

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


Philipp Moroder is the Head of the Shoulder and Elbow Unit at the Charitè University Hospital in Berlin. He completed his training with Herbert Resch, Peter Habermeyer, and Markus Scheibel. In 2018 he was selected for the ASES Traveling Fellowship. Recently he won the Neer Award 2019 for his clinical research.

Selected Other Published Work

Moroder, P., Runer, A., Hoffelner, T., Frick, N., Resch, H., & Tauber, M. (2011). A Prospective Study of Snowkiting Injuries. The American Journal of Sports Medicine, 39(7), 1534–1540.

Moroder, P., Hirzinger, C., Lederer, S., Matis, N., Hitzl, W., Tauber, M., … Auffarth, A. (2012). Restoration of Anterior Glenoid Bone Defects in Posttraumatic Recurrent Anterior Shoulder Instability Using the J-Bone Graft Shows Anatomic Graft Remodeling. The American Journal of Sports Medicine, 40(7), 1544–1550.

Moroder, P., Runer, A., Kraemer, M., Fierlbeck, J., Niederberger, A., Cotofana, S., … Resch, H. (2015). Influence of Defect Size and Localization on the Engagement of Reverse Hill-Sachs Lesions. The American Journal of Sports Medicine, 43(3), 542–548

Tauber, M., Valler, D., Lichtenberg, S., Magosch, P., Moroder, P., & Habermeyer, P. (2016). Arthroscopic Stabilization of Chronic Acromioclavicular Joint Dislocations: Triple- Versus Single-Bundle Reconstruction. The American Journal of Sports Medicine, 44(2), 482–489.

Moroder, P., Tauber, M., Scheibel, M., Habermeyer, P., Imhoff, A. B., Liem, D., … Resch, H. (2016). Defect Characteristics of Reverse Hill-Sachs Lesions. The American Journal of Sports Medicine, 44(3), 708–714.

Seitlinger, G., Moroder, P., Scheurecker, G., Hofmann, S., & Grelsamer, R. P. (2016). The Contribution of Different Femur Segments to Overall Femoral Torsion. The American Journal of Sports Medicine, 44(7), 1796–1800.

Moroder, P., Plachel, F., Tauber, M., Habermeyer, P., Imhoff, A., Liem, D., … Scheibel, M. (2017). Risk of Engagement of Bipolar Bone Defects in Posterior Shoulder Instability. The American Journal of Sports Medicine, 45(12), 2835–2839.

Auffarth, A., Resch, H., Matis, N., Hudelmaier, M., Wirth, W., Forstner, R., … Moroder, P. (2018). Cartilage Morphological and Histological Findings After Reconstruction of the Glenoid With an Iliac Crest Bone Graft. The American Journal of Sports Medicine, 46(5), 1039–1045.

Moroder, P., Plachel, F., Becker, J., Schulz, E., Abdic, S., Haas, M., … Auffarth, A. (2018). Clinical and Radiological Long-term Results After Implant-Free, Autologous, Iliac Crest Bone Graft Procedure for the Treatment of Anterior Shoulder Instability. The American Journal of Sports Medicine, 46(12), 2975–2980

February Featured Author

Koji Tanaka.jpg
Koji Tanaka, MD, PhD
Department of Orthopedic Surgery
Kurume University
Fukuoka, Japan

From the February issue: Effects of Estrogen-Deficient State on Rotator Cuff Healing

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


Dr. Tanka is an orthopedic surgeon based in Kurume, Fukuoka, Japan. He graduated from Faculty of Medicine, Saga University, Saga, Japan in 2010. He will take a degree of PhD in March 2019. This article in the American Journal of Sports Medicine entitled,
“Effect of Estrogen-Deficient State on Rotator Cuff Healing.”  is his thesis for a degree of PhD. He  specializez in shoulder & elbow surgery.  A member of the Japanese Orthopedic Association (JOA)and Japan Shoulder Society(JSS. He has been nominated for Best Poster Awards in Shoulder and Elbow section, AAOS 2018 Annual Meeting March 6-10, New Orleans, Louisiana and Best Poster Prize in 28th SECEC-ESSSE CONGRESS  (EUROPEAN SOCIETY FOR SURGERY OF THE SHOULDER AND THE ELBOW)Geneva 2018, Switzerland, September 19-22, 2018.

Selected Other Published Work

Honda, H., Gotoh, M., Kanazawa, T., Ohzono, H., Nakamura, H., Ohta, K., … Shiba, N. (2017). Hyaluronic Acid Accelerates Tendon-to-Bone Healing After Rotator Cuff Repair. The American Journal of Sports Medicine, 45(14), 3322–3330. https://doi.org/10.1177/0363546517720199

Ohzono, H., Gotoh, M., Nakamura, H., Honda, H., Mitsui, Y., Kakuma, T., … Shiba, N. (2017). Effect of Preoperative Fatty Degeneration of the Rotator Cuff Muscles on the Clinical Outcome of Patients With Intact Tendons After Arthroscopic Rotator Cuff Repair of Large/Massive Cuff Tears. The American Journal of Sports Medicine, 45(13), 2975–2981. https://doi.org/10.1177/0363546517724432

January Featured Author


Einar Andreas Sivertsen, MD.
Lovisenberg Diaconal Hospital
Oslo, Norway

From the January issue: No Association Between Risk of Anterior Cruciate Ligament Rupture and Selected Candidate Collagen Gene Variants in Female Elite Athletes From High-Risk Team Sports

Podcast: Listen to Dr. Siversten discuss his article in the January issue.


Dr. Sibersten is an orthopaedic surgeon based in Oslo, Norway. He has experience with techniques of molecular biology during his PhD work. After switching to the field of orthopaedic surgery, he have focused my research on  injuries of the knee,  including ligament injuries as well as cartilage injuries..

Selected Other Published Work

Sivertsen EA, Haug KBF, Kristianslund EK, Trøseid AS, Parkkari J, Lehtimäki T,
Mononen N, Pasanen K, Bahr R. No Association Between Risk of Anterior Cruciate
Ligament Rupture and Selected Candidate Collagen Gene Variants in Female Elite
Athletes From High-Risk Team Sports. Am J Sports Med. 2018 Nov
28:363546518808467. doi: 10.1177/0363546518808467. [Epub ahead of print] PubMed
PMID: 30485117.

Røtterud JH, Sivertsen EA, Forssblad M, Engebretsen L, Årøen A. Effect on Patient-Reported Outcomes of Debridement or Microfracture of Concomitant
Full-Thickness Cartilage Lesions in Anterior Cruciate Ligament-Reconstructed
Knees: A Nationwide Cohort Study From Norway and Sweden of 357 Patients With
2-Year Follow-up. Am J Sports Med. 2016 Feb;44(2):337-44. doi:
10.1177/0363546515617468. Epub 2015 Dec 11. PubMed PMID: 26657851.

Røtterud JH, Sivertsen EA, Forssblad M, Engebretsen L, Arøen A. Effect of meniscal and focal cartilage lesions on patient-reported outcome after anterior
cruciate ligament reconstruction: a nationwide cohort study from Norway and
Sweden of 8476 patients with 2-year follow-up. Am J Sports Med. 2013
Mar;41(3):535-43. doi: 10.1177/0363546512473571. Epub 2013 Jan 31. PubMed PMID:

Røtterud JH, Sivertsen EA, Forssblad M, Engebretsen L, Årøen A. Effect of gender and sports on the risk of full-thickness articular cartilage lesions in
anterior cruciate ligament-injured knees: a nationwide cohort study from Sweden
and Norway of 15 783 patients. Am J Sports Med. 2011 Jul;39(7):1387-94. doi:
10.1177/0363546510397813. PubMed PMID: 21730206.


December Featured Author

Elizabeth Arendt, MD.
University of Minnesota

From the December issue: Risk of Redislocation After Primary Patellar Dislocation: A Clinical Prediction Model Based on Magnetic Resonance Imaging Variables

Podcast: Listen to Dr. Arendt discuss her article in the December issue.


Dr. Arendt is Professor and Vice Chair in the Department of Orthopaedic Surgery. Her primary clinical interest is the knee, and research interest has centered on those knee conditions that affect females more than males. To date this has focused on stress fractures, ACL injuries, and PF disease and injury. She was on the NCAA safeguard committee for 6 years, and was the medical director for men’s and women’s intercolleagiate sports at her university for over 25 years. She remains a orthopedic team physician for women’s volleyball and basketball. Dr. Arendt serves on the Editorial Boards of Knee and American Journal of Sports Medicine.

Selected Other Published Work

Askenberger M, Janarv P, Finnbogason T, Arendt EA. Morphology and Anatomic Patellar Instability Risk Factors in First-Time Traumatic Lateral Patellar DislocationsAm J Sports Med. 2017 Jan. 45(1):50-58. doi: 10.1177/0363546516663498.

Ridley TJ, Hinckel B, Kruckeberg BM, Agel J, Arendt, EA. Anatomical Patella Instability Risk Factors on MRI Show Sensitivity Without Specificity in Patients With Patellofemoral Instability: A Systemic Review. JISAKOS, 2016 May 18. doi: 10.1136/jisakos-2015-000015

Arendt EA, England K, Agel J, Tomkins M. An Analysis of Knee Anatomic Imaging Factors Associated with Primary Lateral Patellar Dislocations. KSSTA, 2016 Mar 26. doi: 10.1007

Askenberger M, Arendt EA, Ekstrom W, Voss U, Finnbogason T, Janarv PM. Medial Patellofemoral Ligament Injuries in Children with First-Time Lateral Patellar Dislocation: A Magnetic Resonance Imaging and Arthroscopic StudyAm J Sports Med. 2016; 44(1): 152-158

Tompkins MA, Arendt EA. Patellar Instability Factors in Isolated Medial Patellofemoral Ligament Reconstructions-What Does the Literature Tell Us? A Systematic ReviewAm J Sports Med. 2015 Sept; 43(9):2318-27. doi: 10.1177/0363546515571544.t.

Arendt EA, Dejour D. Patella instability: building bridges across the ocean a historic review. Knee Surg Sports Traumatol Arthrosc. 2013 Feb;21(2):279-93. Impact Factor: 2.019

Monson J, Arendt EA. Rehabilitative protocols for select patellofemoral procedures and nonoperative management schemes. Sports Med Arthrosc. 2012 Sep;20(3):136-44 Impact Factor: 1.977 PubMed PMID: 22878654.

Wentorf FA, Sudoh K, Moses C, Arendt EA, Carlson CS.  The effects of estrogen on material and mechanical properties of the intra- and extra-articular knee structures.  Am J Sports Med 34(12):1948-52, 2006. Impact Factor: 4.309

Arendt EA, Agel J, Heikes C, Griffiths H.  Stress injuries to bone in college athletes: A retrospective review of experience at a single institutionAm J Sports Med 31:959-968, 2003. Impact Factor: 4.309

Arendt EA, Dick R.  Knee injury patterns among men and women in collegiate basketball and soccer. NCAA data and review of literature.  Am J Sports Med 23(6):694-701, 1995.  Review.  Impact Factor: 4.309  http://www.ncbi.nlm.nih.gov/pubmed/8600737


November Featured Author

Brian Waterman, MD.
Orthopedics Sports Medicine
Shoulder/ Elbow Surgery
Winston-Salem, North Carolina

From the November issue: Autologous Chondrocyte Implantation for Patellofemoral Chondral Defects: Improved Pain Relief and Occupational Outcomes Among US Army Servicemembers

Podcast: Listen to Dr. Waterman discuss his article in the November issue.


Brian R. Waterman, MD is a board-certified orthopedic surgeon specializing in sports medicine, cartilage restoration, and shoulder/elbow care. After graduating with degrees from the University of Virginia and Eastern Virginia Medical School, he performed his orthopedic surgery residency through the U.S. Army at William Beaumont Army Medical Center and Texas Tech University Health Sciences Center in El Paso, Texas. Following residency, he assumed the role of Director of Orthopaedic Research and became an Assistant Professor at the Uniformed Services University of the Health Sciences. He previously deployed with the 28th Combat Support Hospital to Helmand Province, Afghanistan, and received numerous honors, including the Army Commendation Medal (2) and Meritorious Service Medal (2). He performed his fellowship training with the renowned Sports Medicine program at Rush University Medical Center, where he was also a team physician for the Chicago Bulls, Chicago White Sox, and Chicago Fire. He has authored over 150 peer-reviewed publications and book chapters, and currently serves as an Associate Editor for the Arthroscopy Journal. Dr. Waterman is currently an Associate Professor in Orthopaedic Surgery and Assistant Fellowship Director at Wake Forest Baptist Medical Center in Winston-Salem, North Carolina, and he provides care for Wake Forest University athletics, Winston Salem Dash (Chicago White Sox), and high schools in the Triad region.


Selected Other Published Work in AJSM

Zarkadis NJ, Belmont PJ Jr, Zachilli MA, Holland CA, Kinsler AR, Todd MS,
Pallis MP, Waterman BR. Autologous Chondrocyte Implantation and Tibial Tubercle
Osteotomy for Patellofemoral Chondral Defects: Improved Pain Relief and
Occupational Outcomes Among US Army Servicemembers. Am J Sports Med. 2018 Oct
11:363546518800713. doi: 10.1177/0363546518800713. [Epub ahead of print] PubMed
PMID: 30307742.

Lansdown DA, Kunze K, Ukwuani G, Waterman BR, Nho SJ. The Importance of Comprehensive Cam Correction: Radiographic Parameters Are Predictive of
Patient-Reported Outcome Measures at 2 Years After Hip Arthroscopy. Am J Sports
Med. 2018 Jul;46(9):2072-2078. doi: 10.1177/0363546518780311. Epub 2018 Jun 21.
PubMed PMID: 29927617.

Eisenstein ED, Lanzi JT, Waterman BR, Bader JM, Pallis MP. Medialized
Clavicular Bone Tunnel Position Predicts Failure After Anatomic Coracoclavicular
Ligament Reconstruction in Young, Active Male Patients. Am J Sports Med. 2016
Oct;44(10):2682-2689. Epub 2016 Jul 12. PubMed PMID: 27407087

Waterman BR, Rensing N, Cameron KL, Owens BD, Pallis M. Survivorship of
Meniscal Allograft Transplantation in an Athletic Patient Population. Am J Sports
Med. 2016 May;44(5):1237-42. doi: 10.1177/0363546515626184. Epub 2016 Feb 17.
PubMed PMID: 26888878.

Waterman BR, Liu J, Newcomb R, Schoenfeld AJ, Orr JD, Belmont PJ Jr. Risk
factors for chronic exertional compartment syndrome in a physically active
military population. Am J Sports Med. 2013 Nov;41(11):2545-9. doi:
10.1177/0363546513497922. Epub 2013 Aug 2. PubMed PMID: 23911700.

Waterman BR, Belmont PJ Jr, Cameron KL, Svoboda SJ, Alitz CJ, Owens BD. Risk
factors for syndesmotic and medial ankle sprain: role of sex, sport, and level of
competition. Am J Sports Med. 2011 May;39(5):992-8. doi:
10.1177/0363546510391462. Epub 2011 Feb 2. PubMed PMID: 21289274.

Waterman BR, Belmont PJ Jr, Cameron KL, Deberardino TM, Owens BD. Epidemiology
of ankle sprain at the United States Military Academy. Am J Sports Med. 2010
Apr;38(4):797-803. doi: 10.1177/0363546509350757. Epub 2010 Feb 9. PubMed PMID:

Cotter EJ, Hannon CP, Christian DR, Wang KC, Lansdown DA, Waterman BR, Frank
RM, Cole BJ. Clinical Outcomes of Multifocal Osteochondral Allograft
Transplantation of the Knee: An Analysis of Overlapping Grafts and Multifocal
Lesions. Am J Sports Med. 2018 Oct;46(12):2884-2893. doi:
10.1177/0363546518793405. Epub 2018 Sep 4. PubMed PMID: 30179524.

October Featured Author

Eivind Inderhaug, MD, MPH, PhD
Surgical Clinic
Haraldsplass Deaconess Hospital
Department of Clinical Sciences
University of Bergen

From the October issue: Effect of Anterolateral Complex Sectioning and Tenodesis on Patellar Kinematics and Patellofemoral Joint Contact Pressures

Podcast: Listen to Dr. Inderhaug discuss his article in the October issue.


Eivind Inderhaug is a Consultant Orthopaedic surgeon specializing in knee surgery and sports medicine at Haraldsplass Deaconess Hospital, Bergen, Norway. He is also Associate Professor at Department of Clinical Medicine, University of Bergen. Inderhaug graduated from University of Oslo but have done his post-graduate training in Bergen. In addition to his medical degree, Inderhaug has a Master in Health Economics, Policy and Management from University of Oslo. A special interest is in cost-efficiency analyses and evaluation of health-care programs.

Inderhaug defended his PhD-thesis “Changing paradigms of ACL surgery” in 2015 and has later undertaken a post-doc/research fellowship at Imperial College London under the supervision of Andrew A. Amis. Research interests include clinical studies on knee and shoulder surgery and has lately expanded to include anatomical and biomechanical perspectives.

Directing a group of researchers from Orthopaedics, Radiology, Physiotherapy and Engineering, Inderhaug is supervising medical students and PhD-students. Inderhaug is a Member of NOF, AAOS, ESSKA and ACL study Group. He has received several prices and grants for past and ongoing research projects. With an extensive list of publications and book-chapters, he regularly attends international conferences and meetings as an invited speaker and instructor. In addition to the KSSTA editorial board assignment, Inderhaug also serves at the AJSM editorial board for social media.

Selected Other Published Work in AJSM

Inderhaug E, Stephen JM, Williams A, Amis A. Biomechanical comparison of anterolateral procedures combined with anterior cruciate ligament reconstruction. Am J Sports Med (2017) 45:347-354

Inderhaug E, Stephen JM, Williams A, Amis A. The effect of anterolateral tenodesis on tibial contact pressures and kinematics. Am J Sports Med (2017) DOI:10.1177/0363546517717260.

Inderhaug E, Stephen JM, Williams A, Amis A. Anterolateral tenodesis or anterolateral ligament complex reconstruction: effect of flexion angle at graft fixation when combined with anterior cruciate ligament reconstruction. Am J Sports Med (2017). DOI: 10.1177/0363546517724422.

 Solheim E, Hegna J, Strand T, Harlem T, Inderhaug E. Randomized study of long-term (15-17 years) outcome after microfracture versus mosaicplasty in knee articular cartilage defects. Am J Sports Med 46:826-831.

Inderhaug E, Stephen JM, Williams A, Amis A. Effect on anterolateral complex sectioning and tenodesis on patellar kinematics and patellofemoral joint contact pressures. Am J Sport Med (2018). DOI:10.1177/0363546518790248.