A kit in parts comprising (i) a visualiser for a dental implant root, the visualiser comprising a) on one side of the body of the visualiser a mechanical connection part suitable for connecting to a collaborating connection part provided on an element selected from the group consisting of a predetermined implant root and an abutment corresponding to the predetermined implant root, whereby, when properly connected, the connection is defining, relative to the visualiser, the axis of orientation of the implant root and the position of the top of the implant root along the axis of orientation, and b) as part of the body of the visualiser at least three markers, which contrast under electromagnetic radiation with their surroundings, whereby a marker is understood to represent any 2D or 3D geometrical object which is able to define one predetermined reference point of which the coordinates may be determined, the markers being observable and recognizable by an electromagnetic recognition technique applied from at least one observation point, whereby the markers on the visualiser define a geometric pattern, of which the electromagnetic recognition technique is capable of collecting the spatial information, and (ii) a data file comprising the spatial information of the geometric pattern and referenced thereto information determining the axis of orientation of the implant root and the position of the top of the implant root along the axis of orientation, relative to the pattern, and also identifying the visualiser and the predetermined implant root, whereby the spatial information of the geometric pattern which is comprised in the data file comprises the coordinates of the markers relative to a first three dimensional coordinate system, whereby the markers are suitable for the recognition technique to collect the coordinates of the markers relative to a second three dimensional coordinate system, characterised in that the kit in parts further comprises a computer program comprising instructions so that the geometric pattern is recognisable by determining the number of markers and the second set of coordinates of these markers, calculating the second set of distances between all the individual markers observed and recognized as being markers of the pattern, and recognizing the pattern by retrieving a record in the data file which comprises a first set of marker coordinates which result in a first set of distances between the markers which corresponds to the second set of distances within a deviation for each distance of at most 50 micrometer (μm). (i) a visualiser for a dental implant root, the visualiser comprising a) on one side of the body of the visualiser a mechanical connection part suitable for connecting to a collaborating connection part provided on an element selected from the group consisting of a predetermined implant root and an abutment corresponding to the predetermined implant root, whereby, when properly connected, the connection is defining, relative to the visualiser, the axis of orientation of the implant root and the position of the top of the implant root along the axis of orientation, and b) as part of the body of the visualiser at least three markers, which contrast under electromagnetic radiation with their surroundings, whereby a marker is understood to represent any 2D or 3D geometrical object which is able to define one predetermined reference point of which the coordinates may be determined, the markers being observable and recognizable by an electromagnetic recognition technique applied from at least one observation point, whereby the markers on the visualiser define a geometric pattern, of which the electromagnetic recognition technique is capable of collecting the spatial information, and a) on one side of the body of the visualiser a mechanical connection part suitable for connecting to a collaborating connection part provided on an element selected from the group consisting of a predetermined implant root and an abutment corresponding to the predetermined implant root, whereby, when properly connected, the connection is defining, relative to the visualiser, the axis of orientation of the implant root and the position of the top of the implant root along the axis of orientation, and b) as part of the body of the visualiser at least three markers, which contrast under electromagnetic radiation with their surroundings, whereby a marker is understood to represent any 2D or 3D geometrical object which is able to define one predetermined reference point of which the coordinates may be determined, the markers being observable and recognizable by an electromagnetic recognition technique applied from at least one observation point, whereby the markers on the visualiser define a geometric pattern, of which the electromagnetic recognition technique is capable of collecting the spatial information, and (ii) a data file comprising the spatial information of the geometric pattern and referenced thereto information determining the axis of orientation of the implant root and the position of the top of the implant root along the axis of orientation, relative to the pattern, and also identifying the visualiser and the predetermined implant root,