C. Benjamin Ma, MD

Chief of Sports Medicine and Shoulder Surgery

Dr. C. Benjamin Ma is chief of sports medicine and shoulder surgery. He specializes in shoulder surgery, with expertise in all procedures including arthroscopy, shoulder replacements and tendon transfers. He also specializes in arthroscopic knee surgeries, such as ligament reconstruction, cartilage replacement and meniscus surgery.

Ma's research focuses on advanced imaging of cartilage degeneration, anterior cruciate ligament (ACL) reconstructions and rotator cuff repairs. He has received multiple research grants, from such organizations as the National Institutes of Health and the Arthritis Foundation, for rotator cuff studies and advanced imaging of ACLs and cartilage. He is involved in clinical trials to evaluate shoulder replacement techniques, cartilage resurfacing methods and ways to prevent knee osteoarthritis.

Ma earned his medical degree at Johns Hopkins School of Medicine. He completed a residency in orthopedic surgery at the University of Pittsburgh, where he also completed a fellowship in musculoskeletal research. He then completed a fellowship in shoulder and knee surgery and sports medicine at the Hospital for Special Surgery.

Ma is a member of the MOON Shoulder Group, a professional collaboration within the Multi-Center Orthopaedic Outcome Network. He is also a member of the American Orthopaedic Society for Sports Medicine; Arthroscopy Association of North America; International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine; and American Shoulder and Elbow Surgeons.

Ma is the team physician for the University of California, Berkeley.

Conditions & Treatments

More about C. Benjamin Ma

Education

John Hopkins University School of Medicine 1996

Residencies

University of Pittsburgh Medical Center, Orthopedic Surgery 2002

Fellowships

University of Pittsburgh Medical Center, Musculoskeletal Research 2002
Hospital for Special Surgery, New York, Shoulder and Knee Surgery/Sports Medicine 2003

Selected Research and Publications

  1. Cooper DE, Dunn WR, Huston LJ, Haas AK, Spindler KP, Allen CR, Anderson AF, DeBerardino TM, Lantz BBA, Mann B, Stuart MJ, Albright JP, Amendola AN, Andrish JT, Annunziata CC, Arciero RA, Bach BR, Baker CL, Bartolozzi AR, Baumgarten KM, Bechler JR, Berg JH, Bernas GA, Brockmeier SF, Brophy RH, Bush-Joseph CA, Butler V JB, Campbell JD, Carey JL, Carpenter JE, Cole BJ, Cooper JM, Cox CL, Creighton RA, Dahm DL, David TS, Flanigan DC, Frederick RW, Ganley TJ, Garofoli EA, Gatt CJ, Gecha SR, Giffin JR, Hame SL, Hannafin JA, Harner CD, Harris NL, Hechtman KS, Hershman EB, Hoellrich RG, Hosea TM, Johnson DC, Johnson TS, Jones MH, Kaeding CC, Kamath GV, Klootwyk TE, Levy BA, Ma CB, Maiers GP, Marx RG, Matava MJ, Mathien GM, McAllister DR, McCarty EC, McCormack RG, Miller BS, Nissen CW, O'Neill DF, Owens BD, Parker RD, Purnell ML, Ramappa AJ, Rauh MA, Rettig AC, Sekiya JK, Shea KG, Sherman OH, Slauterbeck JR, Smith MV, Spang JT, Svoboda SJ, Taft TN, Tenuta JJ, Tingstad EM, Vidal AF, Viskontas DG, White RA, Williams JS, Wolcott ML, Wolf BR, York JJ, Wright RW. Physiologic Preoperative Knee Hyperextension Is a Predictor of Failure in an Anterior Cruciate Ligament Revision Cohort: A Report From the MARS Group. Am J Sports Med. 2018 Jun 01; 363546518777732.
  2. Wong SE, Colley AK, Pitcher AA, Zhang AL, Ma CB, Feeley BT. Mental health, preoperative disability, and postoperative outcomes in patients undergoing shoulder arthroplasty. J Shoulder Elbow Surg. 2018 May 21.
  3. Grace TR, Khanna K, Choo KJ, Croci R, Feeley BT, Ma CB, Zhang AL. The influence of preoperative opioid use on inpatient opioid requirements and discharge prescriptions after primary shoulder arthroplasty. J Shoulder Elbow Surg. 2018 Apr 24.
  4. Chen E, Amano K, Pedoia V, Souza RB, Ma CB, Li X. Longitudinal Analysis of Tibiofemoral Cartilage Contact Area and Position in ACL Reconstructed Patients. J Orthop Res. 2018 Apr 18.
  5. Salesky MA, Grace TR, Feeley BT, Ma CB, Zhang AL. Effects of cemented versus press-fit primary humeral stem fixation in the setting of revision shoulder arthroplasty. J Shoulder Elbow Surg. 2018 Mar 13.
  6. Kraeutler MJ, McCarty EC, Belk JW, Wolf BR, Hettrich CM, Ortiz SF. Descriptive Epidemiology of the MOON Shoulder Instability Cohort. Am J Sports Med. 2018 Apr; 46(5):1064-1069.
  7. Knox J, Pedoia V, Wang A, Tanaka M, Joseph GB, Neumann J, Link TM, Li X, Ma CB. Longitudinal changes in MR T1?/T2 signal of meniscus and its association with cartilage T1p/T2 in ACL-injured patients. Osteoarthritis Cartilage. 2018 Feb 10.
  8. Amano K, Huebner JL, Stabler TV, Tanaka M, McCulloch CE, Lobach I, Lane NE, Kraus VB, Ma CB, Li X. Synovial Fluid Profile at the Time of Anterior Cruciate Ligament Reconstruction and Its Association With Cartilage Matrix Composition 3 Years After Surgery. Am J Sports Med. 2018 Mar; 46(4):890-899.
  9. Leathers MP, Ialenti MN, Feeley BT, Zhang AL, Ma CB. Do younger patients have better results after reverse total shoulder arthroplasty? J Shoulder Elbow Surg. 2018 Jan 05.
  10. McLaughlin DC, Cheah JW, Aleshi P, Zhang AL, Ma CB, Feeley BT. Multimodal analgesia decreases opioid consumption after shoulder arthroplasty: a prospective cohort study. J Shoulder Elbow Surg. 2018 Apr; 27(4):686-691.
  11. Risk Factors and Predictors of Significant Chondral Surface Change From Primary to Revision Anterior Cruciate Ligament Reconstruction: A MOON and MARS Cohort Study. Am J Sports Med. 2018 Mar; 46(3):557-564.
  12. Kumar D, Su F, Wu D, Pedoia V, Heitkamp L, Ma CB, Souza RB, Li X. Frontal Plane Knee Mechanics and Early Cartilage Degeneration in People With Anterior Cruciate Ligament Reconstruction: A Longitudinal Study. Am J Sports Med. 2018 Feb; 46(2):378-387.
  13. Ma CB. Editorial Commentary: Biomechanics of Cutting Studies-Knowledge and Deficiencies: Knee Joint Stability and the Posterolateral Corner. Arthroscopy. 2017 Oct; 33(10):1831.
  14. Lansdown DA, Pedoia V, Zaid M, Amano K, Souza RB, Li X, Ma CB. Variations in Knee Kinematics After ACL Injury and After Reconstruction Are Correlated With Bone Shape Differences. Clin Orthop Relat Res. 2017 Oct; 475(10):2427-2435.
  15. Teng HL, Wu D, Su F, Pedoia V, Souza RB, Ma CB, Li X. Gait Characteristics Associated With a Greater Increase in Medial Knee Cartilage T1? and T2 Relaxation Times in Patients Undergoing Anterior Cruciate Ligament Reconstruction. Am J Sports Med. 2017 Dec; 45(14):3262-3271.
  16. Wong SE, Pitcher AA, Ding DY, Cashman N, Zhang AL, Ma CB, Feeley BT. The effect of patient gender on outcomes after reverse total shoulder arthroplasty. J Shoulder Elbow Surg. 2017 Nov; 26(11):1889-1896.
  17. Lansdown D, Ma CB. The Influence of Tibial and Femoral Bone Morphology on Knee Kinematics in the Anterior Cruciate Ligament Injured Knee. Clin Sports Med. 2018 Jan; 37(1):127-136.
  18. Ma CB. Editorial Commentary: Success of Rotator Cuff Healing-Do We Need to Improve on the Strength Anymore? Arthroscopy. 2017 Sep; 33(9):1659-1660.
  19. Cheah JW, Sing DC, McLaughlin D, Feeley BT, Ma CB, Zhang AL. The perioperative effects of chronic preoperative opioid use on shoulder arthroplasty outcomes. J Shoulder Elbow Surg. 2017 Nov; 26(11):1908-1914.
  20. Lansdown DA, Lee S, Sam C, Krug R, Feeley BT, Ma CB. A Prospective, Quantitative Evaluation of Fatty Infiltration Before and After Rotator Cuff Repair. Orthop J Sports Med. 2017 Jul; 5(7):2325967117718537.

Publications are derived from MEDLINE/PubMed and provided by UCSF Profiles, a service of the Clinical & Translational Science Institute (CTSI) at UCSF. Researchers can make corrections and additions to their publications by logging on to UCSF Profiles.