Reconstruction of acetabular deficiencies- AAOS classification

Reconstruction of acetabular deficiencies- AAOS classification

Deficiency of the acetabular bone stock is one of the majorproblems in revision total hip arthroplasty, and it may resultfrom numerous factors, including the following: (1) osteolysiscaused by wear, loosening, or infection; (2) excessive boneresection at the time of previous surgery, especially if thepatient has had a resurfacing procedure or previous acetabularrevision; (3) preexisting bone deficit from acetabular fractureor dysplasia that was not corrected at the time of previoussurgery; and (4) inadvertent destruction of bone duringremoval of a previous component or cement.

The development of guidelines for management of acetabulardeficiencies has been hindered by a lack of standard nomenclatureto describe them. The AAOS Committee on the Hipdevised a clinically useful classification system for acetabulardeficiencies (Table 3-6). This classification system is presentedin the section on revision of total hip arthroplasty becausethis is the setting in which most acetabular deficiencies areencountered. The system is equally applicable to primaryarthroplasties, however. Description of acetabular deficitsmakes preoperative planning easier and simplifies operativemanagement (Fig. 3-153).

Note: this article comes from CAMPBELL’S OPERATIVE ORTHOPAEDICS by S. Terry Canale James H. Beaty.