Method for producing a dentist tool formed by an overlay to be used by a dentist in removing tooth structure, said method comprising the steps of: acquiring three-dimensional data relating to a shape of a tooth and at least a part of a neighbouring tooth processing said three-dimensional data with a computer so as to determine an overlay fitting said tooth and fitting at least said part of said neighbouring tooth further processing said three-dimensional data with said computer so as to determine a predetermined part of tooth structure to be removed from said tooth so as to prepare said tooth for further treatment determining at least two guiding edges of which a first and a second guiding edge are spaced apart from each other by a distance d of at least 0.5 mm, said guiding edges being configured so as to enable said dentist cutting tool to be guided by simultaneously contacting said first and said second guiding edge in such a manner as to enable a guided removal of at least partially said predetermined part of tooth structure producing said determined overlay having said determined guiding edges.Un método para producir una herramienta de dentista formada por un revestimiento a ser utilizado por un dentista en la remoción de la estructura del diente, dicho método comprende los pasos de : adquirir datos tridimensionales relacionados con la forma de un diente y al menos una parte de un diente vecino procesar dichos datos tridimensionales con una computadora para determinar un revestimiento que ajusta dicho diente y ajusta al menos dicho diente vecino procesar adicionalmente dichos datos tridimensionales con dicha computadora para determinar una parte predeterminada de la estructura de diente a ser removida de dicho diente para preparar dicho diente para tratamiento adicional determinar al menos dos orillas guía de las cuales una primer y una segunda orilla guía están distanciadas una de otra por una distancia de al menos 0.5 mm, dichas orillas guía estando configura
