Reusable
In the re-usable Guide Cannula the guide itself is made from KEL-F and stainless steel. This makes it possible to put them in acetone after experiments. The acetone will dissolve the dental cement enabling the re-use of guides. Note that the dummies cannot and should not be put in acetone. For the AT 4 series of probes only the Cuprophane versions can be used with a AT 4 Re-usable Guide Cannula. On the AT 2 Re-usable Guide Cannula the dummy/probe is locked by turning the upper part of the guide a quarter of a full turn. The AT 6 Re-usable Guide Cannula and the AT 4 Re-usable Guide Cannula both lock by using a dual spring mechanism that secures the dummy/probe in the guide head.
As with the disposable Guide Cannulas all the re-usable ones are fixed in the probe clip during insertion and cementing. The spring lock mechanism version can be fixed at either the flat lower part of the guide head or at the extending dummy cannula at the top. Cleaning off the dental cement is done by using acetone. Pay attention to cleaning the inside of the guide shaft properly or residues of dental cement may remain causing probes to be destroyed.