of fastening elements in fig1 have sufficiently large spaces between each other on the carrier piece 2 fig6 shows a sectional view along line 6 6 in fig5 a fastening element 4 is attached to tooth 20 a either with adhesive or cement the orientation of the fastening element 4 on tooth 20 a is achieved by means of the auxiliary positioning part 21 a which is connected in turn to the fastening element 4 with a snap connection 23 care has to be taken during attachment of the fastening element 4 to tooth 20 a so that the auxiliary positioning part 21 a itself is not bonded to tooth 20 a the adhesives or the types of cement used to attach the fastening element 4 will not bond with the auxiliary positioning part itself if the auxiliary positioning part is made of a material such as ptfe for example the snap connection 23 is illustrated in fig6 a and it can be seen that the auxiliary positioning part 21 a is provided with a snap on projection engaging the cutout on the fastening element 4 in addition this cutout is additionally helpful during removal of the bonded fastening element 4 from tooth 20 a the auxiliary positioning parts 21 a through 21 d are provided with predetermined breaking points 22 a through 22 d for easier removal of the positioning parts after attachment.