8 / 36
CAMLOG&Science – Chapter 2
ROTATIONAL FIT: COMPARISON OF IMPLANT SYSTEMS
Edinger et al. (2007) performed an in vitro investigation of the rotational fit
of the Astra Tech, CAMLOG
®
, OSSEOTITE
®
Certain, Brånemark and Replace™
Select implant systems. Depending on the fastening of the abutment on the
implant (manually, 30 Ncm, left stop, right stop), a range of rotational play
was measured from 0.46° to 3.50°. The CAMLOG
®
Implant System demon-
strated a favorable range of rotational play with only 0.46° to 1.20° (Fig. 5).
In addition, Edinger et al. (2007) studied the rotational play between the
abutment and the superstructure. It is less than the rotational play between
the abutment and the implant or the model analogue (range: 0.6°). Therefore,
the play between the abutment and the implant or the model analogue is
clinically relevant.
The authors concluded that the rotational play of all investigated implant
systems – independent of the connection type – is the source of defect. They
deduced from the test set-up that the superstructure can compensate for
malposition of the abutment on the implant at best to a certain degree. This
means for the dental technician: The more precisely he works, the greater
the probability that problems will occur at the try-in. In other words:
The more precisely the dental technician works, the less the rotational play
of the components must be.
Fig. 5:
Box plot of the rotation angle of the individual implant types for each of the four measuring
methods: manual, 30 Ncm, left stop, right stop. (Edinger et al. (2007) reproduced with kind permis-
sion of BDIZ EDI).
left stop
right stop
manual
30 Ncm
type