Dietmar Dammerer1, Philipp Blum2, David Putzer3, Annelies van Beeck4, Michael Nogler3, Martin Thaler1. 1. Department of Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstrasse 35, 6020, Innsbruck, Austria. 2. Department of Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstrasse 35, 6020, Innsbruck, Austria. philippblum1@gmx.de. 3. Department of Experimental Orthopedics, Medical University of Innsbruck, Innrain 36, 6020, Innsbruck, Austria. 4. Antwerp University Hospital, Wilrijkstraat 10, 2650, Edegem, Belgium.
Abstract
PURPOSE: Restoration cages and bone allografts have been proposed to manage severe acetabular bone defects. We aimed to investigate the migration behaviour of a restoration cup and impacted allograft bone in severe acetabular defects with Einzel-Bild-Röntgen-Analyse (EBRA). METHODS: Applying a retrospective study design, 64 cases treated between 2009 and 2016 were reviewed. We determined the preoperative Charlson Comorbidity Index (CCI), pre- to postoperative WOMAC score, blood loss and functional outcome. From preoperative x rays, the acetabular deficiencies were classified according to Paprosky. Cup migration analyses were performed with EBRA. RESULTS: Mean age at surgery was 73 (range: 38-93) years. According to the classification by Paprosky et al., 50% (n = 32) of our patients showed a type III B and 28.1% (n = 18) a type III A defect. Radiological follow-up for migration analysis was 35 (range: 4-95) months. Migration analysis showed a mean cup migration of 0.7 mm (range: 5.7-9.6) medial and 1.8 mm (range: 1.7-12.6) cranial. CONCLUSION: In conclusion, acetabular restoration cages in combination with bone impaction grafting showed a low revision rate at a mean follow-up of 35 months. Mean cup migration revealed low rates after 2 years and suggested a stable postoperative implant position.
PURPOSE: Restoration cages and bone allografts have been proposed to manage severe acetabular bone defects. We aimed to investigate the migration behaviour of a restoration cup and impacted allograft bone in severe acetabular defects with Einzel-Bild-Röntgen-Analyse (EBRA). METHODS: Applying a retrospective study design, 64 cases treated between 2009 and 2016 were reviewed. We determined the preoperative Charlson Comorbidity Index (CCI), pre- to postoperative WOMAC score, blood loss and functional outcome. From preoperative x rays, the acetabular deficiencies were classified according to Paprosky. Cup migration analyses were performed with EBRA. RESULTS: Mean age at surgery was 73 (range: 38-93) years. According to the classification by Paprosky et al., 50% (n = 32) of our patients showed a type III B and 28.1% (n = 18) a type III A defect. Radiological follow-up for migration analysis was 35 (range: 4-95) months. Migration analysis showed a mean cup migration of 0.7 mm (range: 5.7-9.6) medial and 1.8 mm (range: 1.7-12.6) cranial. CONCLUSION: In conclusion, acetabular restoration cages in combination with bone impaction grafting showed a low revision rate at a mean follow-up of 35 months. Mean cup migration revealed low rates after 2 years and suggested a stable postoperative implant position.
Entities:
Keywords:
Cup migration; Cup revision; Einzel-Bild-Röntgen-Analyse (EBRA); Restoration cup; Total hip arthroplasty
Authors: Martin A Buttaro; Diego Muñoz de la Rosa; Fernando Comba; Francisco Piccaluga Journal: Clin Orthop Relat Res Date: 2012-11 Impact factor: 4.176
Authors: Keijo T Mäkelä; Antti Eskelinen; Pekka Pulkkinen; Pekka Paavolainen; Ville Remes Journal: J Bone Joint Surg Am Date: 2008-10 Impact factor: 5.284
Authors: Neil P Sheth; Charles L Nelson; Bryan D Springer; Thomas K Fehring; Wayne G Paprosky Journal: J Am Acad Orthop Surg Date: 2013-03 Impact factor: 3.020