AO Spine Classification Systems

AO Spine Injury Classification Systems

The AO Spine Knowledge Forum Trauma was given the task to develop and validate a new classification system. The AO Spine Thoracolumbar and Subaxial Injury Classification systems are the result of a systematic assessment and revision of the Magerl classification. The AO Spine Classification Group reached a consensus on a classification that incorporates both fracture morphology and clinical factors relevant for clinical decision making. After the endorsement of the classification by the International Board, the Knowledge Forum Trauma finalized the validation studies.

  • Upper Cervical Injury Classification System

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  • Subaxial Injury Classification System

    Validation Studies:


    AO Spine subaxial cervical spine injury classification system
    Vaccaro AR, Koerner JD, Radcliff KE, Oner FC, Reinhold M, Schnake KJ, Kandziora F, Fehlings MG, Dvorak MF, Aarabi B, Rajasekaran S, Schroeder GD, Kepler CK, Vialle LR. Eur Spine J 25(7): 2173-2184, 2016.

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    Download the toolkit and start using the classification today

  • Thoracolumbar Injury Classification System

    Validation Studies:


    AO Spine thoracolumbar spine injury classification system: fracture description, neurological status, and key modifiers
    Vaccaro AR, Oner C, Kepler CK, Dvorak M, Schnake K, Bellabarba C, Reinhold M, Aarabi B, Kandziora F, Chapman J, Shanmuganathan R, Fehlings M, Vialle L;
    AOSpine Spinal Cord Injury & Trauma Knowledge Forum.
    Spine (Phila Pa 1976). 1;38(23):2028-37, Nov 2013.

    Reliability analysis of the AO Spine thoracolumbar spine injury classification system by a worldwide group of naïve spinal surgeons
    Kepler CK, Vaccaro AR, Koerner JD, Dvorak MF, Kandziora F, Rajasekaran S, Aarabi B, Vialle LR, Fehlings MG,
    Schroeder GD, Reinhold M, Schnake KJ, Bellabarba C, Cumhur Öner F.
    Eur Spine J 25(4): 1082-1086, 2016.

    Downloads:


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  • Sacral Injury Classification System

    Validation Studies:


    Description and Reliability of the AOSpine Sacral Classification System
    Vaccaro AR, Schroeder GD, Divi SN, Kepler CK, Kleweno CP, Krieg JC, Wilson JR, Holstein JH, Kurd MF, Firoozabadi R, Vialle LR, Oner FC, Kandziora F, Chapman JR, Schnake KJ, Benneker LM, Dvorak MF, Rajasekaran S, Vialle EN, Joaquim AF, El-Sharkawi MM, Dhakal GR, Popescu EC, Kanna RM, Muijs SPJ, Tee JW, Bellabarba C. JBJS 102(16): 1454-1463, Aug 19, 2020. 

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AO Spine-DGOU Osteoporotic Fracture Classification System

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AO Spine Adult Spine Deformity (AO ASD) Patient Profile

The AO ASD Patient Profile provides an overview that allows physicians to systematically consider the factors that could contribute to optimal management of the condition. Whether by using the tool in clinical practice or for training purpose, all adult deformity surgeons are encouraged to use the classification in their daily practice. 

Download the AO Spine ASD Patient Profile here.

Spinal lnstability Neoplastic Score (SINS)

SINS is a classification system for tumor-related spinal instability. The tool facilitates appropriate surgical referral of patients. It is highly reliable, reproducible, and a valid assessment tool to address a key question in patients with metastatic spine disease: is the spine "stable" or is there "current or possible instability" that warrants surgical assessment?

It has been validated in spine surgeons, radiation oncologists, radiologists, and spine fellows and residents.

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