abstract disclosed is method for generating a dental preparation guide configured for validating the preparation of at least one tooth for a dental restoration, said method comprising: a: obtaining a digital 3d representation of a pre-prepared set of teeth； b: virtually removing said at least one tooth from the digital 3d representation of the pre-prepared set of teeth, such that the digital 3d representation of the remaining set of teeth is formed； c: providing a virtual target dental restoration expressing a target shape of the dental restoration； d: creating a virtual surface validation for the dental preparation guide based on the virtual target dental restoration, where the surface validation is such that the preparation of the tooth can be validated by the dental preparation guide； and e: creating a virtual surface preparation guide by combining the virtual surface validation and at least part of the surface of the digital 3d representation of the remaining set of teeth. abstract translation patent abstract: "dental preparation guide". A process for generating a dental preparation guide configured to validate the preparation of at least one tooth for a dental restoration is described, said process comprising: a: obtaining a digital 3d representation of a set of pre-prepared teeth； b: virtually removing said at least one tooth from the digitally rendered 3D representation of a set of prearranged teeth, so that a digitally rendered 3D representation of a remaining set of teeth is formed； c: providing a virtual desired dental restoration expressing a desired form of dental restoration； d: create a virtual validation surface for the dental preparation guide based on the desired virtual dental restoration, wherein the validation surface is such that tooth preparation can be validated by the dental preparation guide； and e: creating a virtual staging guide surface by combining the virtual validation surface and at least part of the surface of the remnant set digital
