Fig. 2

Fixation of the coronoid prosthesis with a single or double bolt. A Fixation of the coronoid prosthesis with a single bolt; the direction of the bolt is perpendicular to the bone–prosthesis interface from posterior to anterior. B Fixation of the coronoid prosthesis with a double bolt; the direction of the screw is 60° to the bone–prosthesis interface in the coronal plane from anterior to posterior