Abstract: A method for determining the screw trajectory of a pedicle bone screw comprises: obtaining a CT image of the target bone area intended to receive the pedicle bone screw, establishing an individualized three-dimensional geometric model of the target bone area based on the CT image, accessing a database comprising a three-dimensional bone area model; wherein the bone area model comprises a bone screw insertion surface and a pedicle traversing surface for each pedicle, morphing the bone area model to the geometric model of the target bone area generating a morphed vertebra model with a bone screw insertion surface and the pedicle traversing surface, calculating a maximum of bone density when the bone material is replaced by a bone screw for a bone screw in the morphed vertebra model of the target bone, and outputting the space vector of the screw trajectory for the bone screw together with the length and diameter of the bone screw in the morphed vertebra model of the target bone.

Abstract: Computer implemented method, computing device, system and computer pro-gram product for assessment of interconnection(s) between orthopaedic implant(s) and a bone tissue(s) by: extracting location specific material properties of the bone tissue(s) from pre- and/or post-operative images; generating a 3D-Finite Element Model comprising first finite elements representing the orthopaedic implant interconnected to the bone tissue(s), and second finite elements representing at least part of the bone tissue(s) surrounding the orthopaedic implant; applying the location-specific material properties to the second finite elements; applying at least one external load to the one or more of the first finite elements; determining internal stresses of the 3D-Finite Element Model; and outputting an assessment of the interconnection between orthopaedic implant(s) and the bone tissue(s) based on the determining internal stresses.

Abstract: Computer implemented method, computing device, system and computer pro-gram product to support selection between different types of pedicle screws (201-m) to be applied in a spine (202) comprising: generating a spinal 3D-model (MSpine) of a patient; generating a reinforcement 3D-model (MRod) of a reinforce-5 ment structure (30) for interconnecting vertebrae (2001-n) of the spine (202); generating a finite element model (FE) corresponding to the spinal 3D-model (MSpine) and the reinforcement 3D-model (MRod); applying a load onto the finite element model (FE) and determining loading factor(s) of the pedicle screws (201-m) using the finite element model (FE); and outputting an assessment of the plurality of different types of pedicle screws (201-m) based on the calculated loading factor(s).

Abstract: The present disclosure relates to an expandable intervertebral cage (1) with a base (2) comprising a peripheral circumferential side wall (7) extending in a first direction (x) and a first bone interaction surface (5); a stage (3) comprising a second bone interaction surface (6) arranged essentially opposite to the first bone interaction surface (5) with respect to the expandable intervertebral cage (1); and a locking mechanism (4) for locking the position of the second bone interaction surface (6) of the stage (3) with respect to the first bone interaction surface (5) of the base (2) at least in the first direction (x) and being arranged at least partially within the circumferential side wall (7) of the base (2).

Abstract: A computer implemented method of assisting bending of a reinforcing rod (10) includes the steps of receiving spatial positions (P1-n) of chirurgical implants (201-n), in particular pedicle screws, captured by a camera-based positioning device (50), the chirurgical implants (201-n) configured to attach to the reinforcing rod (10); calculating a rod shape (10c) corresponding to the spatial positions (P1-n), allowing the chirurgical implants (201n) to be attached to the reinforcing rod (10); based on the calculated rod shape (10c), calculating a sequence of bending parameter set(s); and generating tool operation guidance for bending tool(s) (70) based on the bending parameter set(s), the tool operation guidance indicating a sequence of prescribed operation steps (S1-n), wherein the sequence of prescribed operation steps (S1-n) are determined such, that when carried out using the bending tool(s) (70), causes the bending tool(s) (70) to shape the reinforcing rod (10) corresponding to the calculated rod shape (10c)