View clinical trials related to Pseudarthrosis.
Filter by:When there is a bone defect, bone transport is used to bridge the defect. Frequently, the bone in the docking site (where the transported bone comes together) doesn't heal. The objective is to study the effectivity of rhBmp-2 (inductos) to stimulate bone healing, in order to find new techniques to treat non-union of long bones. The method of the study is a randomized controlled trial, to compare rhBMP-2 and autologous bone grafting in stimulating bone healing in the docking site.
The purpose of this study is to assess the safety and fusion rates following posterior lateral fusion with the Dynesys Spinal System used as an adjunct to fusion and compare to literature control.
The purpose of the Post-Market Surveillance study is to evaluate safety.
The purpose of this study is to improve fusion (bony healing) techniques and improve patient recovery by identifying cells in your body that make bone. Patients with spine problems often need surgeries that include fusion (bony healing) of vertebrae (bones in your back) together in order to hold the bones steady allowing them to heal together (fusion). If the vertebrae (back bones) fail to heal together, which occurs about 10-15% of the time, it can result in a slower recovery and may require revision (another) surgery. By using a small portion of the graft taken during surgery the investigators hope to define the cells that make bone most efficiently. This will help reduce the need for revision surgeries and improve patient recovery.
The aim of the study is to determine whether the evaluation of pro-osteogenic activity of autologous serum may predict the effectiveness of platelet gel in regenerating bone tissue in patients with nonunions of long bones. Serum samples will be collected before the surgery, and their pro-osteogenic activity will be evaluated by using a bioactivity test (mineralization assay). In order to determine whether the pro-osteogenic activity of the serum is able to discriminate between individuals who will achieve or will not achieve bone consolidation, the laboratory results will be correlated with clinical and radiographic results at 12 months, when patients will be considered as healed or not healed.
In this study the investigators are presenting the advantages as well as the disadvantages of ACUTE SHORTENING AND RELENGTHENINIG VS SEGMENT TRANSPORT methods.
Treatment of nonunion, delayed union and malunion fractures of long bones remains problematic. The definition of nonunion is a failure of the fracture to heal in six months in a patient in whom progressive repair had not been observed radiographically between the third and sixth month after the fracture. First of all good surgical techniques are stable immobilization must be obtained and local sepsis excluded. Then stimulation of the callus is required. Numerous techniques have been developed ranging from invasive interventions (including internal fixation with the use of bone graft or bone graft substitutes) to non invasive procedures (ultrasound and pulsed electromagnetic fields). Recently, autologous cell therapy was presented as an interesting approach. The concept of such therapies is based on the effect of stem cells presented in the bone marrow and able to be transformed in osteoblast cells. The percutaneous technique of autologous bone-marrow grafting is a minimally invasive alternative able to produce a good healing of the fracture. The efficacy is dependent of the concentration in progenitor cell reinjected. An optimization of this type of treatment could be achieved using a technique to increase the differentiation of the bone marrow cells in preosteoblasts before the injection in situ by an adequate culture. Therefore we would like to start a pilot open study on the feasibility and the efficacy of implantation of preosteoblasts into nonunion. Two different presentations exist: the atrophic and the hypertrophic pseudarthrosis in relationship with radiological features of bone proliferation at the tip of bone fragments. Some data support that atrophic and hypertrophic nonunion fractures could have different physiopathological factors. So, in a first time we only would evaluate the atrophic form and to determine in an open study the effect of the implantation of preosteoblasts into atrophic nonunion.
To prospectively collect radiographic and outcome data on patients who are having cervical spine fusion surgery with the VueLock™ Anterior Cervical Plate System
Sometime osseous reconstruction needs allogeneic bone, in this study we use Ostéopure™ from Ostéobanque d'Auvergne, which is a osseous matrix. However Ostéopure™ integration lasts a long time. To optimize this integration we purpose to associate mesenchymal progenitors cells from autologous bone marrow.
The purpose of this multi-center study is to obtain clinical data to substantiate that Aastrom TRC autologous bone marrow cells will regenerate bone in patients with established (appendicular skeletal) non union fractures, when used with one of the commonly employed commercially available allograft chip matrices.