Mechanical Testing Following the Application of Polymers on Different Types of Screws Used to Fix Osteoporotic Bone

The mechanical tests aimed to evaluate the behavior of different screws, used as osteosynthesis material, after covering them with a polymeric film and used for fixing in block of synthetic bone that simulates the structure of osteoporotic bone. The traction forces applied to cause the fracture and the displacements caused by them were recorded by a specialized program WDW Universal Testing Machine and Control System. In conclusion by applying a polyurethane acrylic polymer coating, an efficient transition medium between the screw and the bone is ensured, which leads to improved cohesion between them, ultimately increasing the stability of the fracture. The addition of hydroxyapatite, a component of bone, to the polymer mass has advantages especially for the 10% concentration.