A scan body (1, 19, 20) insertable in, or on, a dental implant, or in, or on, an implant analog, and recognizable in an optical scanning system arranged for finding orientation and position of said scan body, said scan body comprising: - a first hollow element having a distal end, a middle section and a proximal end, wherein: ∘ said distal end comprises at least one geometric feature recognizable in an optical scanning system; ∘ said middle section comprises an opening (7, 21, 22, 23); - a second element, for fastening said scan body to a dental implant or an implant analog, comprising: ∘ an elongated component (8,24, 25, 26, 27, 28, 32) having a top portion and an end threaded portion; said end threaded portion extending out of said proximal end of said first hollow element; ∘ retaining means (11, 14, 15, 16, 18, 34) for retaining at least part of said elongated component within said first hollow element, said retaining means being to be fastened to said top portion of said elongated component, wherein said distal end and said proximal end have openings (12, 13) along a longitudinal axis of said scan body, wherein said middle section opening (7, 21, 22, 23) is configured to allow for inserting said retaining means of said second element into said first hollow element, wherein said retaining means have at least one dimension larger than the largest dimension of a cross section of said distal end and said proximal end openings (12, 13), said cross section being perpendicular to said longitudinal axis, thereby retaining at least part of said elongated component (8, 24, 25, 26, 27, 28, 32) within said first hollow element and wherein said distal end opening is configured to allow for insertion of a tightening tool. - a first hollow element having a distal end, a middle section and a proximal end, wherein: ∘ said distal end comprises at least one geometric feature recognizable in an optical scanning system; ∘ said middle section comprises an opening (7, 21, 22, 23); ∘ said distal end comprises at least one geometric feature recognizable in an optical scanning system; ∘ said middle section comprises an opening (7, 21, 22, 23); - a second element, for fastening said scan body to a dental implant or an implant analog, comprising: ∘ an elongated component (8,24, 25, 26, 27, 28, 32) having a top portion and an end threaded portion; said end threaded portion extending out of said proximal end of said first hollow element; ∘ retaining means (11, 14, 15, 16, 18, 34) for retaining at least part of said elongated component within said first hollow element, said retaining means being to be fastened to said top portion of said elongated component, wherein said distal end and said proximal end have openings (12, 13) along a longitudinal axis of said scan body, wherein said middle section opening (7, 21, 22, 23) is configured to allow for inserting said retaining means of said second element into said first hollow element, wherein said retaining means have at least one dimension larger than the largest dimension of a cross section of said distal end and said proximal end openings (12, 13), said cross section being perpendicular to said longitudinal axis, thereby retaining at least part of said elongated component (8, 24, 25, 26, 27, 28, 32) within said first hollow element and wherein said distal end opening is configured to allow for insertion of a tightening tool. ∘ an elongated component (8,24, 25, 26, 27, 28, 32) having a top portion and an end threaded portion; said end threaded portion extending out of said proximal end of said first hollow element; ∘ retaining means (11, 14, 15, 16, 18, 34) for retaining at least part of said elongated component within said first hollow element, said retaining means being to be fastened to said top portion of said elongated component,