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Classification of Acetabular Defects

- Discussion:
    - segmental defects:
         - segmental defects are repaired w/ structural grafts;
         - if sufficient bone is available from iliac crest & shaped to replace absent bone;
         - central (medial wall absent)

    - cavitary deficiencies
         - the anterior and posterior columns and peripheral bone is intact;
         - skeleton is intact and therefore these defects are easier to deal with than segmental defect;
         - defects should be filled with graft;
         - particulate graft is reversed reamed to pack evenly into defects

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Acetabular defect classification and surgical reconstruction in revision arthroplasty. A 6-year follow-up evaluation.