includes a neck 142 an anti rotation portion 144 and a bevel 146 at the coronal end of the dental abutment 100 the neck 142 has a length l 2 the neck 142 is substantially cylindrical with sides that are substantially parallel to the longitudinal axis 124 of the dental abutment 100 some dental abutments have necks with other shapes such as for example with rectangular or octagonal rather than circular cross sections in contrast the anti rotation portion 144 of the coronal portion 123 is tapered with a cone angle u03b3 such that the perimeter e g circumference of the coronal portion 123 at the coronal end of the anti rotation portion 144 is smaller than the apical end of the anti rotation portion 144 in dental abutment 100 the cone angle u03b3 is approximately 3 u00b0 in some dental abutments the angle u03b3 is more or less than 3 u00b0 e g between 2 5 u00b0 and 3 5 u00b0 it has been found that dental abutments in which the angle u03b3 is more than 2 5 u00b0 help enable scanning to be performed without any additional modifications or interpretations to the scan the surface of coronal portion 123 can be either rough or smooth based on the.