Regarding my original material for these sounds, it was multiple takes of teeth clanking and jaws dislocation movements. I recorded the sounds with an AKG C 414 and I had to compress them a lot because even if the person was quite close to the mic, the clanking was to soft..
So compression and a bit of maximising helped me to get the presence and punch I wanted! I also filtered with a low cut everything under 200 Hz which wasn't needed for this type of sound. And finally I automated a pitch shift plugin now and again and use time compression (Flex time in Logic) to make the clanking a little faster. Here is a picture of the Logic strip with the plugins I used.
Teeth chatter 1 by gugasprod Teeth chatter 2 by gugasprod Teeth chatter 3 by gugasprod