A method for for comparing between an orthodontic element's actual position on the surface of a tooth and a proper position comprise monitoring the element, the tooth or both once the element and the tooth are proximal to one another by an image acquisition unit which transmits an image to a screen that displays the image and displaying information on the screen regarding proper position of the element in a manner allowing to compare between the actual and the proper position is disclosed. Further disclosed is a system and device for positioning of an orthodontic element or a marking device having a marking member for marking a position for subsequent placement of an orthodontic element on a surface of a tooth.