Although various methods have been described in the literature, the variety of choices indicates that an ideal option is still missing. Bony coverage is one of the most important factors regarding implantation of the acetabular cup during surgery. The more serious the pathology is, the more challenging the total hip replacement (THR) would be. Introductionĭevelopmental dysplasia of the hip (DDH) is one of the most common causes of secondary osteoarthritis (OA) in early adulthood. No complication directly related to the technique was observed.Ĭonclusion: In the short-term follow-up, the RSC technique is a reliable procedure for acetabular augmentation of hip dysplasia, providing enough coverage for the cementless cup and assuring proper stability. Functional evaluation showed a significant improvement after the operation. The single-photon emission tomography (SPECT) showed the activity of the bone graft gradually increased after surgery and became almost the same as the reference area after 12 months. No significant center-edge angle changes and no contiguous radiolucent zones at the boneprosthesis interface were observed at the final follow-up. Results: The mean follow-up time was 59.6☒5.6 (range, 12 to 109) months. The 99mTc bone scintigraphy examination was also performed at around two weeks, six months, and 12 months postoperatively to evaluate the healing process of the graft. Follow-up was done at six weeks, three months, and annually thereafter using standard pelvis anteroposterior X-ray and function scores. It is fixed with two screws at a 45° angle allowing simultaneous distalization and lateral covering of the cementless cup. The graft is partially inside the acetabulum and partially on the lateral aspect of the ilium. The RSC technique uses a L-shaped graft cut from the femoral head. Patients and methods: Between December 2008 and March 2020, we applied the RSC technique in a total of 48 hips of 41 patients (2 males, 39 females mean age: 50.1☙.5 years range, 30 to 75 years) with Hartofilakidis type A, B, C hip dysplasia. Objectives: This study aims to present a new technique, the roof step cut (RSC), for acetabular augmentation of hip dysplasia. Keywords: Hip dysplasia, osteoarthritis, roof step cut, total hip replacement. Zoltán Csernátony 1, Gyula Győrfi 1, Sándor Barna 2, Sándor Manó 3, János Szabó 1, Lei Zhang 1ġDepartment of Orthopaedic Surgery, Faculty of Medicine, University of Debrecen, Debrecen, HungaryĢDepartment of Radiology, Scanomed Ltd, Debrecen, HungaryģLaboratory of Biomechanics, Faculty of Medicine, University of Debrecen, Debrecen, Hungary The roof step cut: A novel technique for bony reconstruction of acetabular roof deficiency during total hip replacement
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