Abstract
BackgroundThe present study aimed to identify the risk factors associated with revision total hip arthroplasty (THA) failure using a Kerboull-type (KT) plate.MethodsWe analyzed 77 revision THAs using cemented acetabular components with a KT plate for aseptic loosening between May 2000 and March 2012. We examined the association of bone graft type, acetabular bone defects, age at the time of surgery, preoperative Japanese Orthopaedic Association (JOA) score, postoperative JOA hip score, and body mass index, with radiographic failure as the outcome.ResultsThe 7.4-year radiographic failure survival rate was 81.6%. The survival rate was significantly different between the beta-tricalcium phosphate (β-TCP) group and the bulk allograft group (p = 0.019). The survival curves were also significantly different between the β-TCP group and bulk allograft group (p = 0.036). American Academy of Orthopaedic Surgeons type IV was significantly associated with radiographic failure (odds ratio [OR]: 15.5, 95% confidence interval [CI]: 1.4–175.4; p = 0.032).ConclusionsThe midterm outcomes of revision THA indicate that type of bone graft and bone defect size may affect radiographic survival rate when using a KT plate.
Highlights
The present study aimed to identify the risk factors associated with revision total hip arthroplasty (THA) failure using a Kerboull-type (KT) plate
Radiographic survival rate Radiographic failure was evaluated for revision THA with beta-tricalcium phosphate (β-TCP), hydroxyapatite (HA), and bulk allografts using cemented sockets with a KT plate
We evaluated the stability of the acetabular component using the Academy of Orthopedic Surgeons (AAOS) classification
Summary
The present study aimed to identify the risk factors associated with revision total hip arthroplasty (THA) failure using a Kerboull-type (KT) plate. To compensate for large bone loss, prosthetic augmentation with bone grafting was developed, and several types of reinforcement devices are currently in use for revision THA, including the Burch-Schneider anti-protrusion cage [5], Mueller support ring [6], Ganz reinforcement ring [7], Kerboull device [8, 9], and Kerboull-type (KT) device [10, 11] (Table 1). The KT plate, a modified Kerboull plate made of titanium with a similar shape, has various offsets and vertical lengths (Fig. 1). It is useful for treating severe dysplasia or large bone defects of the acetabulum. Since 2000, we have used the KT plate with artificial bone materials or bulk grafts fashioned from a femoral head allograft
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