title: Two-year follow-up after advanced core decompression.
abstract: The so-called "Advanced Core Decompression" (ACD) is a new option that tries to remove the necrotic tissue in patients with osteonecrosis of the femoral head (AVN) in a minimally invasive way by the use of a percutaneous expandable reamer and refilling with a resorbable and osteoinductive bone-graft substitute. Seventy-two hips of sixty patients with a mean follow-up of 29.14 months after ACD have been included in this study. Patients underwent physical examination preoperatively and six weeks after surgery as well as at two further follow-ups. Certain phases in disease progression and size of the necrotic lesion were differentiated on the basis of the classification of osteonecrosis of the femoral head by Steinberg.The femoral heads had collapsed in 24 cases (33%). Analysis of the survival rates with regard to defect size revealed that the largest defects had a significantly higher rate of femoral head collapse than the smaller defects. Clinical scores were also depending on defect size but also on disease stage. The current ACD technique has not yet achieved any significant improvement in the success rate of core decompression procedures. It can be concluded that the success of ACD depends especially on the defect size. Copyright © 2015 John Wiley & Sons, Ltd.
authors.affiliation: Department of Orthopaedics, University of Duisburg-Essen, Germany.
authors.forename: Tim
authors.initials: T
authors.lastname: Classen
authors.affiliation: Department of Orthopaedics, University of Duisburg-Essen, Germany.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Warwas
authors.affiliation: Department of Orthopaedics, University of Duisburg-Essen, Germany.
authors.forename: Marcus
authors.initials: M
authors.lastname: Jäger
authors.affiliation: Department of Orthopaedics, University of Duisburg-Essen, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Landgraeber
mesh_terms: D000328:Adult; D000368:Aged; D019299:Decompression, Surgical / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D064232:Visual Analog Scale; D055815:Young Adult
keywords: artificial bone graft; avascular necrosis; bone regeneration; core decompression; joint preservation; resorbable synthetic bone substitute