Prosthetic device for replacing at least one vertebral body, the prosthetic device being expandable from a fully collapsed state to a fully expanded state and having - an anterior end and a posterior end which are located on opposite sides of a vertical frontal plane; - a proximal end and a distal end which are located on opposite sides of a vertical midsagittal plane arranged perpendicular to the frontal plane; and - a top end and a bottom end which are located superiorly and inferiorly of a horizontal transverse plane, respectively, whereby the prosthetic device further comprises - an upper endplate having a top surface that is located at the top end and is configured for abutting against a first vertebral body, - a lower endplate having a bottom surface that is located at the bottom end and is configured for abutting against a second vertebral body, and - an expandable support structure extending between the upper and lower endplate (18, 19), said expandable support structure being configured to displace the two endplates (18, 19) relative to one another along a longitudinal axis of the prosthetic device and to hold the two endplates (18, 19) at a an axial distance that is measured between the top surface of the upper endplate and the bottom surface of the lower endplate and corresponds at least to the height of at least half a vertebral body and one intervertebral disc, whereby said axial distance can be set to at least 2 cm, characterized in that the expandable support structure includes an anterior post and a posterior post, each post (22/23) having an upper end hingedly connected to the upper endplate and a lower end hingedly connected to the lower endplate, and each post (22/23) having a length (L1/L2) which is defined by the axial distance between the upper end and the lower end of the respective post (22/23), wherein the length (L1/L2) of each post (22/23) is individually adjustable and is lockable independently from one another to hold the two endplates (18, 19) with an inclination of 0° to 40° relative to each other. - an anterior end and a posterior end which are located on opposite sides of a vertical frontal plane; - a proximal end and a distal end which are located on opposite sides of a vertical midsagittal plane arranged perpendicular to the frontal plane; and - a top end and a bottom end which are located superiorly and inferiorly of a horizontal transverse plane, respectively, - an upper endplate having a top surface that is located at the top end and is configured for abutting against a first vertebral body, - a lower endplate having a bottom surface that is located at the bottom end and is configured for abutting against a second vertebral body, and - an expandable support structure extending between the upper and lower endplate (18, 19), said expandable support structure being configured to displace the two endplates (18, 19) relative to one another along a longitudinal axis of the prosthetic device and to hold the two endplates (18, 19) at a an axial distance that is measured between the top surface of the upper endplate and the bottom surface of the lower endplate and corresponds at least to the height of at least half a vertebral body and one intervertebral disc, whereby said axial distance can be set to at least 2 cm, characterized in that the expandable support structure includes an anterior post and a posterior post, each post (22/23) having an upper end hingedly connected to the upper endplate and a lower end hingedly connected to the lower endplate, and each post (22/23) having a length (L1/L2) which is defined by the axial distance between the upper end and the lower end of the respective post (22/23), wherein the length (L1/L2) of each post (22/23) is individually adjustable and is lockable independently from one another to hold the two endplates (18, 19) with an inclination of 0° to 40° relative to each other.