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Handheld iOS-based spinal navigation versus computer tomography-based image guided navigation in the placement of thoracolumbar pedicle screws; protocol of a randomized controlled trial

The aim of the study is to determine the accuracy of pedicle screw placement when using the iNav navigation tool compared with the established computertomography based navigation.

The (cost-)effectiveness of a new patient empowered protocol without routine x-rays for follow-up of adolescent idiopathic scoliosis patients; A pragmatic randomized trial

To evaluate the (cost-)effectiveness of a new patient-empowered FU protocol in patients with AIS that is based on patient-reported outcome measures (PROMs), self-assessment tools and physical examination, which is compared to standard or usual FU…

Interbody fusion in the treatment of cervicobrachial syndrome; a prospective 5-year follow up extension study of porous titanium cervical cages

Evaluation of longterm clinical and radiological results.