No worries ! No one was harmed in acquiring the teeth and no tomb raiding was commited !!
These are plastic teeth used in dental labs.
There are several manufacturers. I managed to know someone working in a dental lab and could get my hands on some old fashioned design line.

This might look a bit macabre but such a bracelet is an awesome eye catcher.
The next big hit at your upcoming voodoo party or your local zombie gathering ;)

Step 1: Material & Tools

Tools:

Drill
1mm/0.039" drill bit
Steady hand

Materials:

Elastic cord
Plastic teeth (from dental lab or manufacturer samples)

For a single cord bracelet you need about 25-35 teeth depending on your wrist size. 30 teeth would be perfect for a 18cm/7" wrist circumference. To make it a double bracelet you need the double amount of course.

A wide choice of different teeth gives the bracelet a much more interesting look than just using the same sort of teeth for the whole bracelet. I used incisors, canines and molars.

Step 2: Drilling

Drilling holes into smooth curvy surfaces is a bid tricky. Watch your fingers ! But once you successfully drilled two or three of the teeth it gets easier.

Try to align the holes centered. I used the drill to widen the holes a bit so they can be easily slid on the cord.

Step 3: Bead It !

I made a simple knot at one end of the cord so the teeth couldn't slip off.
The teeth were randomly beaded on the cord.
Once I was finished I made a simple figure eight knot.

Step 4:

Now that was easy !
And done is your tooth bracelet.

If you have enough teeth the bracelet could be double folded to get a thicker or heavier look. Or you could make a necklace.

I would like to see your creations !