Zeitschrift für Orthopädie und Unfallchirurgie
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A prospective long-term study of the first 250 cementless Bicontact stems implanted in the BG Trauma Centre, Tuebingen, Germany. ⋯ These outstanding results provide enduring support for the philosophy of the cementless and bone-preserving fixation principles underlying the Bicontact hip stem with proximal intertrochanteric transmission of forces and high primary rotational stability.
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Intraoperative periprosthetic femoral fractures (PFF) during the implantation of primary non-cemented total hip arthroplasties (THA) are an increasing problem. Thus, the goal of this study was to analyse the postoperative performance of primary non-cemented THA in patients with intraoperative PFFs, with respect to the patient's subjective health-related satisfaction. ⋯ Mid-term THA performance and patient satisfaction are not influenced by intraoperative Vancouver A and B1 fractures during implantation of the non-cemented BiCONTACT stem compared to a collective without intraoperative fractures during implantation.
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Total hip arthroplasty for high developmental hip dislocations should restore the anatomic hip centre by implanting the acetabular cup in the true acetabulum. The normalisation of the position of the hip may require femoral shortening to avoid the risk of neurological traction injury. In this study group a subtrochanteric transverse shortening with a cement-free stem (Alloclassic-SL) with a rectangular square diameter was used to secure rotation stability. ⋯ The subtrochanteric transverse shortening osteotomy in total hip arthroplasty is a safe and predictable method for restoring the anatomic centre in high development hip dislocation. The intramedullary stability will be secured by the distal rotation stability of the inherent cross-sectional geometry of this stem design without external stabilisation. A Z-shaped osteotomy of the subtrochanteric shortening or additional augmentation with allograft struts and cables is not necessary.
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With the steady growth in the number of hip arthroplasty revision operations, the concept and long-term results of the Bicontact revision stem with distal interlocking for the treatment of extensive femoral bone defects were investigated in this prospective study. ⋯ The 15-year results confirm the biomechanical concept of the Bicontact revision stem with optional distal interlocking for the treatment of extensive bone defects in stem revision surgery.
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Randomized Controlled Trial Comparative Study
[Intramedullary osteosynthesis in fractures of the mid-third of the clavicle in sports traumatology].
In Germany, non-operative treatment using a figure of eight dressing is the most common method for managing fractures of the mid-third of the clavicle. This treatment is chosen preferably even in cases of dislocated fractures. The described procedures of open osteosynthesis are characterised by a huge access trauma. Up to date literature shows the advantages of intramedullary pin osteosynthesis, which can be considered as a minimally invasive procedure. In this study we compare the results of pin-osteosynthesis with the non-operative treatment in athletes. ⋯ The intramedullary titanium pin osteosynthesis is a promising alternative with better results. Up to date literature and our own results prove the advantages of this minimally invasive osteosynthesis. This procedure allows sports activities to be resumed soon after the operation. As intramedullary pin osteosynthesis is an ideal operation of fractures of the middle third of the clavicle, this comparatively easy procedure with few complications should be more widespread.