Background: There is an ever-increasing number of failed hip arthroplasties
associated with massive deficiency of acetabular bone stock consisting of
a segmental or cavitary defect. This study was undertaken to evaluate the l
ong-term results after use of morselized cryopreserved allogeneic bone graf
t and an antiprotrusio cage to treat such a deficiency.
Methods: From January 1, 1988, to January 1, 1994, forty-one patients (fort
y-one hips) with an acetabular defect classified as type III or IV accordin
g to the American Academy of Orthopaedic Surgeons system were operated on w
ith use of a Burch-Schneider ring and morselized cryopreserved allogeneic c
ancellous bone graft. Thirty-eight patients (thirty-eight hips) were availa
ble for clinical and radiographic follow-up examinations at an average of 7
.3 years (range, 4.2 to 9.4 years) after surgery.
Results: All measured clinical parameters had improved significantly by the
time of the follow-up examination (p < 0.0001). Radiographs confirmed that
none of the thirty-eight hips had any measurable migration or displacement
of the acetabular component and that osseous consolidation occurred only w
ithin the grafted area in all patients.
Conclusion: Acetabular reconstruction with use of morselized cryopreserved
allogeneic cancellous bone graft and the Burch-Schneider ring can be highly
successful in managing massive acetabular deficiencies in revision hip art