| 摘要 |
The invention relates to a method for producing high-geometric precision elements made from a neutral material. Using different types of prosthetic restoration, said elements are intended to fill the damage caused in teeth b y dental caries or tissue alteration having other causes. The inventive elemen ts are also intended to be used to produce high-precision dental crowns or othe r related dental devices. The method is characterised in that: a model (10), which is designed to fill the missing dental tissue that has been destroyed, is made either in vivo, updating and defining a new volume (2) that is bordered by healthy tissue and having a tapered wall, or in vitro, taking an impression in the mouth of a dental preparation using an impression compound , said impression then being cast in plaster, and updating and defining a new volume (2) using said positive plaster model; the measurements of said model (10) are then taken in 3D using a three-dimensional measuring apparatus (4, 15, 17) with light wavefront analysis and volume analysis which is carried o ut using shots, a projector (15) being positioned at an angle to a camera (17) and said projector (15) and camera (17) being mechanically and geometrically linked to a revolving platform (18) that is used to support the model by mea ns of a frame (19) in order to obtain good triangulation; the data are processe d electronically (12) to remodel the morsels of volume; the files are subsequently modified electronically to determine exactly the desired profil e; and the final element to be implanted is machined with a digitally-controlle d machine (6, 23, 24, 22).
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