Notes

High-dose chemotherapy as well as autologous haematopoietic mobile hair transplant for the children, teens, and adults using main metastatic Ewing sarcoma.
Underlying diseases, bone deformities and polyethylene wear affect outcome in young patients undergoing total hip arthroplasty (THA). These issues are not widely confirmed for ceramic-on-ceramic THA, particularly regarding cup fixation. Therefore, we did a retrospective long-term investigation on a large population of cementless ceramic-on-ceramic THA in patients aged 40 years or younger aiming to analyze 1) the complication rate; 2) clinical results; and 3) survival for cup loosening with regard to their preoperative conditions.

Cup loosening could be related to preoperative diagnosis in young patients with a cementless ceramic-on-ceramic THA.

Two hundred and seven hips in 171 patients (97 men and 74 women) underwent a cementless ceramic-on-ceramic THA at a mean age of 31.6±6.8 years. The most frequent diagnoses were avascular necrosis (AVN) of the femoral head (74 hips), pediatric hip diseases (35 hips), severe congenital hip dysplasia (CHD) (31 hips), juvenile rheumatoid arthritis (30 hips) and mild ry, outcome of cementless ceramic-on-ceramic THA in patients under the age of 40 years is satisfactory over ten years of follow up. Cup aseptic loosening was the main cause of failure and appears more related to the initial hip diseases than the age of the patient.

III; retrospective comparative study.
III; retrospective comparative study.Osteoporosis is a public health problem that is contributing to an increasing number of osteoporotic vertebral fractures. The aim of this lecture is to summarize the current state of knowledge about osteoporotic fractures by answering five questions. 1/How does the spine typically age and how is osteoporosis diagnosed? Various normal aging processes will gradually modify the vertebral column (static, dynamic, bone quality). Osteoporosis is diagnosed through a DEXA scan. 2/How is an osteoporotic fracture evaluated clinically and radiologically? Magnetic resonance imaging is the preferred modality for making the diagnosis and selecting the most appropriate treatment. 3/What are the treatment options for an osteoporotic fracture? The options are conservative treatment, conventional surgery, and minimally invasive techniques (cementoplasty, percutaneous instrumentation). 4/Which fractures should be treated, and which technique should be used? The choice is clear when neurological deficits are present, although the indications are less firm when there is no deficit. The treatment can be conservative (back brace) if the fracture is non-displaced and minimally painful, vertebroplasty if the fracture is painful and shows hyperintensity on T2-STIR sequences, vertebral expansion if the radiological deformity worsens along with symptoms. 5/What are the technical challenges and complications related to the presence of osteoporosis when treating vertebral fractures surgically? The reduced bone stock increases the risk of poor implant hold and postoperative mechanical complications (adjacent fracture, junctional kyphosis). Epigenetics inhibitor Technical solutions have been developed (augmented screw fixation, transitional zone) to limit their impact. It is essential to know and master these techniques, and their indications. Treatment of the osteoporosis itself is crucial. Level of evidence V; Expert opinion.Cone-beam scanners (CBCT) enable CT to be performed under weight-bearing - notably for the foot and ankle. The technology is not new it has been used since 1996 in dental surgery, where it has come to replace panoramic X-ray. What is new is placing the scanner on the ground, so as to have 3D weight-bearing images, initially of the foot and ankle, and later for the knee and pelvis. This saves time, radiation and money. It is now increasingly used, but is unfortunately limited by not having specific national health insurance cover in France, and by the psychological reticence that goes with any technological breakthrough. A review of the topic is indispensable, as it is essential to become properly acquainted with this technique. To this end, we shall be addressing 5 questions. What biases does conventional radiography incur? Projecting a volume onto a plane incurs deformation, precluding true measurement. Conventional CT is therefore often associated with an increased dose of radiation. What is the impact of CBCT on radiation dose, costs and the care pathway? The conical beam turns around the limb (under weight-bearing if so desired) in less than a minute, making the radiation dose no greater than in standard X-ray. What does the literature have to say about CBCT, and what are the indications? CBCT is indicated in all foot and ankle pathologies, and indications now extend to the upper limb and the knee, and will soon include the pelvis. How are angles measured on this 3D technique? The recently developed concept of 3D biometry uses dedicated software to identify anatomic landmarks and automatically segment the bones, thereby enabling every kind of measurement. What further developments are to be expected? CBCT may become indispensable to lower-limb surgical planning. Artificial Intelligence will reveal novel diagnostic, prognostic and therapeutic solutions. LEVEL OF EVIDENCE V; expert opinion.There are a variety of options for filling defects during revision total knee arthroplasty cement with or without screws, structural or morselized allograft, highly porous cones and sleeves, massive bone allograft or megaprostheses. Our goal is to describe the techniques for these procedures and their indications. Any necrotic bone, fibrous tissue or granulomas must be excised, and the bone freshened. The height of the joint line must be restored using trial components stabilized by stems. The defect is the space between the bone and each of the two components. Whether contained or not, it can be evaluated using the AORI classification. Cement alone or supplemented with screws, which is pressurized to penetrate the bone, is now only used in small defects less than 10mm in diameter, especially contained one. It is preferable to use morselized compacted bone graft instead. Augments are used to fill AORI type 2 defects less than 10 mm deep in a condyle. They can also be used to position the femoral component and sometimes the tibial one.
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