Radiopaque preventive landmarks' placement during stentless bioprosthesis implantation.

Background: In patients with aortic stenosis, bioprosthetic valves are increasingly used. Although their benefits, they are also presenting limitations, as their time-related degeneration. Reoperation which was, until a few years ago, the only treatment for this condition, carries a significant surgical risk, especially in patients with multiple comorbidities, so the benefit of less invasive technique enabling the implantation of aortic valve prosthesis [transcatheter aortic valve-in-surgical aortic valve (TAV-in-SAV)] by a percutaneous access is remarkably important.

Effect of Wnt3a delivery on early healing events during guided bone regeneration.

Objective: To evaluate the effect of recombinant Wnt3a delivery on the bone regeneration potential following application of the guided bone regeneration (GBR) principle.

Materials And Methods: A critical-size calvarial defect was created on each parietal bone of 14 Wistar strain rats. One defect was used as the test side and was treated with a collagen sponge carrying 2.