Periprosthetic hip fractures (PPFs) after total hip arthroplasty are difficult to treat. Therefore, it is important to identify modifiable risk factors such as stem selection to reduce the occurrence of PPFs. This study aimed to clarify differences in fracture torque, surface strain, and fracture type analysis between three different types of cemented stems. We conducted biomechanical testing of bone analogues using six cemented stems of three different types: collarless polished tapered (CPT) stem, Versys Advocate (Versys) stem, and Charnley-Marcel-Kerboull (CMK) stem. Experienced surgeons implanted each of these types of stems into six bone analogues, and the analogues were compressed and internally rotated until failure. Torque to fracture and fracture type were recorded. We also measured surface strain distribution using triaxial rosettes.Aims
Methods
We compared the clinical outcomes of curved intertrochanteric varus osteotomy (CVO) with bone impaction grafting (BIG) with CVO alone for the treatment of osteonecrosis of the femoral head (ONFH). This retrospective comparative study included 81 patients with ONFH; 37 patients (40 hips) underwent CVO with BIG (BIG group) and 44 patients (47 hips) underwent CVO alone (CVO group). Patients in the BIG group were followed-up for a mean of 12.2 years (10.0 to 16.5). Patients in the CVO group were followed-up for a mean of 14.5 years (10.0 to 21.0). Assessment parameters included the Harris Hip Score (HHS), Oxford Hip Score (OHS), Japanese Orthopaedic Association Hip-Disease Evaluation Questionnaire (JHEQ), complication rates, and survival rates, with conversion to total hip arthroplasty (THA) and radiological failure as the endpoints.Aims
Methods
Transtrochanteric rotational osteotomy (TRO) is performed for
young patients with non-traumatic osteonecrosis of the femoral head
(ONFH) to preserve the hip. We aimed to investigate the long-term
outcomes and the risk factors for failure 15 years after this procedure. This study included 95 patients (111 hips) with a mean age of
40 years (21 to 64) who underwent TRO for ONFH. The mean follow-up
was 18.2 years (3 to 26). Kaplan–Meier survivorship analyses were
performed with conversion to total hip arthroplasty (THA) and radiological
failure due to secondary collapse of the femoral head or osteoarthritic changes
as the endpoint. Multivariate analyses were performed to assess
risk factors for each outcome.Aims
Patients and Methods
