Scan abutment for dental implants, method for creating a model, and use of the scan abutment

A method for creating a model of an upper or lower jaw region of a mouth using at least one scan abutment suitable for being removably fixed to a dental implant implanted in an upper jaw bone or a lower jaw bone of a mouth, said scan abutment being a monoblock piece comprising a coupling base for coupling said scan abutment, directly or through an intermediate piece, to the dental implant, a rod extending from said coupling base along an axis, said rod comprises a shaft with an outer surface and retaining projections extending from said shaft, radially with respect to said axis, from said outer surface of the shaft, and a scan head formed at one end of said rod opposite said coupling base, said scan head comprising on its outer surface at least one singular area;

• wherein at least one dental implant is implanted in a bone of said upper or lower jaw region of the mouth, said method comprising at least the following successive steps:
• [a] fixing said scan abutment to said dental implant by coupling said coupling base to said dental implant;
• [b] applying a mass of impression material on said upper or lower jaw region of the mouth, such that said retaining projections of the scan abutment fixed to the dental implant are plunged into said mass of impression material and said at least one singular area of the scan head of said scan abutment is outside said mass of impression material;
• such that an impression of said upper or lower jaw region of the mouth is formed in said mass of impression material, wherein said scan abutment is made integral with said mass of impression material by said retaining projections;
• [c] releasing said scan abutment from said dental implant and removing said mass of impression material, which comprises said scan abutment integral with said mass of impression material, from said mouth;
• and wherein after step [a], scanning of said scan head of the scan abutment is performed by means of an optical scanner system which recognizes said at least one singular area;
• and based on the recognition of said singular areas, a position and an orientation of said scan abutment are determined.