Primary outcome measure
The main outcome of this study is R/S device migration and will be calculated by analyzing 3D reconstructions of the R/S device, acquired by cone-beam CT (CBCT) scans at baseline and during follow-up and at 12 months. We consider migration either translational or rotational above 1.0 mm or 1° as clinically relevant. Any migration under these cut-offs is considered within the measurement error margin of the analysis (0.3 mm or degrees). These calculations will be carried out by using 3DMedX® (v1.2.24.1, 3D Lab Radboudumc, Nijmegen). R/S positions will be superimposed, compared, and analyzed based on the Iterative Closest Point (ICP) algorithm [