MEDIUM-TERM RESULTS OF THE USE OF CEMENTLESS, PLASMA-COATED WITH DISPERSED TITANIUM POWDER AND HYDROXYAPATITE, ANATOMICAL ACETABULAR CAGES

Title Page & Editorial Board OpenAccess creativecommons back to 2025 Jul-Sep;31(3) Journal of IMAB - Annual Proceeding (Scientific Papers) Publisher: Peytchinski Publishing Ltd. ISSN: 1312-773X (Online) Issue: 2025, vol. 31, issue3 Subject Area: Medicine - DOI: 10.5272/jimab.2025313.6386 Published online: 12 August 2025 Original article J of IMAB. 2025 Jul-Sep;31(3):6386-6393 MEDIUM-TERM RESULTS OF THE USE OF CEMENTLESS, PLASMA-COATED WITH DISPERSED TITANIUM POWDER AND HYDROXYAPATITE, ANATOMICAL ACETABULAR CAGES Hristo PetrichevORCID logo, Spas RadevORCID logo, Valentin PetrovORCID logo, Petko GanevORCID logo, Valeri StavrevORCID logoCorresponding Autoremail, Department of Orthopedics and Traumatology, Faculty of Medicine, Medical University Plovdiv, Bulgaria. ABSTRACT: Background: The purpose of this study is to report the medium-term clinical and radiographic results of Paprosky type II and III acetabular bone defects revised with a cementless anatomical cage and cemented lipped acetabular cup. Methods: We retrospectively analyzed 58 patients who underwent revision hip arthroplasty with cementless anatomical cages and lipped cemented acetabular cups between April 2009 and December 2013. We registered the following bone defects: Paprosky type IIA - 12 patients, Paprosky type IIB – 15 patients, 14 patients were with Paprosky type IIIA - 14 patients and with Paprosky type IIIB – 17 patients (pelvic discontinuity). Clinical assessment included Harris Hip Score (HHS) and Short Form-12 (SF-12). The radiographic assessment included the center of rotation, cage migration, and osteointegration of the implant. Results: We followed up the patients included in our series with a mean follow-up of 89.5 months (range 38–141), The Harris Hip Score (HHS) improved from 29.5 (12–41) points preoperatively to 87.7 (57–96) points during the last follow-up, and the Short Form – 12 (SF–12) also increased. In 1 patient we did revision due to cage loosening and broken screw 57 months after surgery. In 2 patients, we registered non-progressive radiolucency in the AP and Lateral radiographs without any clinical complaints. Conclusion: The cementless anatomical cage combined with a cemented lipped acetabular cup achieves a good result with a high osteointegration rate in Paprosky type II and III acetabular bone defects.