Colloquia

Samenvatting

Scoliosis is a deformity in three dimensions of the spine, which consists of a lateral deviation and an axial rotation. The XS-TOR implant is designed to correct the curve by rotating the middle vertebrae while allowing for growth. Currently, the XS-TOR is not able to provide an adjustable torque output that can be tuned to the individual scoliosis curve and spine stiffness. Also, it is not possible to lower or increase the torque output after implantation. This could introduce an under or over-correction. An extra element called the torque adjustment device (TAD) was designed to adjust the torque output after surgery. The device can be operated in a minimally invasive surgical procedure. Hand calculations, simulations, and experiments using 3D printing are performed to verify the concept. It is expected that the addition will improve the correction capability of the implant which could improve the life quality of patients with idiopathic scoliosis. In the future, the TAD should be produced and clinically tested to verify the operation. If required, the design could be adapted to decrease the height, reducing the risk of occurrence of pressure spots.