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    Donald B Longjohn, MD

    TitleAssistant Professor of Clinical Orthopaedic Surgery
    SchoolKeck School of Medicine of USC
    DepartmentOrthopaedic Surgery
    AddressHCT 1520 San Pablo Street
    Health Sciences Campus
    Los Angeles California 90033
    Phone+1 323 442 5860
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      Dr. Longjohn is an assistant professor in the Department of Orthopaedic Surgery at the Keck School of Medicine of USC. He specializes in hip and knee replacement/revision surgery, as well as arthritis, rheumatoid arthritis, osteoarthritis and arthroscopic surgery. In addition to his membership in professional organizations such as American Association of Hip and Knee Surgeons and the Western Orthopaedic Association, Dr. Longjohn is a member of the LA County Sheriff’s Department Medical Reserve Company 206 (Office of Homeland Security) and also volunteers as a flight physician for the LA County Sheriff’s Department Air Rescue 5. Dr. Longjohn has been honored with several teaching awards. His current research focus is on clinical and biomechanical studies relating to joint replacement and arthroplasty revision techniques and materials. Dr. Longjohn did his residency in orthopaedic surgery at USC+LAC and completed a fellowship in arthritis and joint implant surgery at Rancho Los Amigos National Rehabilitation Center/Keck Hospital of USC.


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      Los Angeles Magazine2016Super Doctor
      Castle Connolly2016Amreica's Top Doctors

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      Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help.
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      1. Knutsen AR, Lau N, Longjohn D, Ebramzadeh E, Sangiorgio SN. Periprosthetic femoral bone loss in total hip arthroplasty: systematic analysis of the effect of stem design. Hip Int. 2017 Feb 21; 27(1):26-34. PMID: 27515762.
        View in: PubMed
      2. Knusten AR, Ebramzadeh E, Longjohn D, Sangiorgio SN. Systematic analysis of bisphosphonate intervention on periprosthetic BMD as a function of stem design. J Arthroplasty. 2014 Jun; 29(6):1292-7. PMID: 24703781.
        View in: PubMed
      3. Sangiorgio SN, Longjohn D, Dorr LD, Ebramzadeh E. Challenges in relating experimental hip implant fixation predictions to clinical observations. J Biomech. 2011 Jan 11; 44(2):235-43. PMID: 21040920.
        View in: PubMed
      4. Sangiorgio SN, Longjohn D, Dorr LD, Ebramzadeh E. The influence of proximal stem geometry and surface finish on the fixation of a double-tapered cemented femoral stem. J Biomech. 2011 Jan 04; 44(1):22-7. PMID: 20828697.
        View in: PubMed
      5. Sangiorgio SN, Longjohn D, Lee JL, Alexander JD, Dorr LD, Ebramzadeh E. Simulation of extreme loads on the proximal femur for implant fixation assessment. J Appl Biomater Biomech. 2008 May-Aug; 6(2):72-80. PMID: 20740449.
        View in: PubMed
      6. Sangiorgio SN, Ebramzadeh E, Longjohn D, Dorr LD. Effects of dorsal flanges on fixation of a cemented total hip replacement femoral stem. J Bone Joint Surg Am. 2004 Apr; 86-A(4):813-20. PMID: 15069149.
        View in: PubMed
      7. Ebramzadeh E, Sangiorgio SN, Longjohn D, Buhari CF, Dorr LD. Initial stability of cemented femoral stems as a function of surface finish, collar, and stem size. J Bone Joint Surg Am. 2004 Jan; 86-A(1):106-15. PMID: 14711952.
        View in: PubMed
      8. Ebramzadeh E, Sangiorgio SN, Longjohn D, Buhari CF, Morrison BJ, Dorr LD. Effects of total hip arthroplasty cemented femoral stem surface finish, collar and cement thickness on load transfer to the femur. J Appl Biomater Biomech. 2003 Jan-Apr; 1(1):76-83. PMID: 20803475.
        View in: PubMed
      9. Haft GF, Heiner AD, Callaghan JJ, Dorr LD, Wan Z, Long W, Longjohn D, Brown TD. Polyethylene liner cementation into fixed acetabular shells. J Arthroplasty. 2002 Jun; 17(4 Suppl 1):167-70. PMID: 12068431.
        View in: PubMed
      10. Udomkiat P, Dorr LD, Won YY, Longjohn D, Wan Z. Technical factors for success with metal ring acetabular reconstruction. J Arthroplasty. 2001 Dec; 16(8):961-9. PMID: 11740749.
        View in: PubMed
      11. Min B, Longjohn D, Dorr LD, Wan Z. Radiographic comparison of diaphyseal grit blasted with smooth surface stems by matched pair analysis. Clin Orthop Relat Res. 2000 Dec; (381):156-67. PMID: 11127652.
        View in: PubMed
      12. Dorr LD, Wan Z, Longjohn D, Dubois B, Murken R. Total hip arthroplasty with use of the Metasul metal-on-metal articulation. Four to seven-year results. J Bone Joint Surg Am. 2000 Jun; 82(6):789-98. PMID: 10859098.
        View in: PubMed
      13. Longjohn D, Dorr LD, McPherson EJ. Blood management challenges in revision hip arthroplasty. Orthopedics. 1999 Jan; 22(1 Suppl):s148-50. PMID: 9927117.
        View in: PubMed
      14. Longjohn D, Dorr LD. Soft tissue balance of the hip. J Arthroplasty. 1998 Jan; 13(1):97-100. PMID: 9493545.
        View in: PubMed
      15. Longjohn D, Zionts LE, Stott NS. Acute hematogenous osteomyelitis of the epiphysis. Clin Orthop Relat Res. 1995 Jul; (316):227-34. PMID: 7634711.
        View in: PubMed
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