How are teeth impressions collected and analyzed in CSI?
The most important thing is to preserve the impression, and that must be done with photography. A forensic photographer will take detailed photos of the impression, and it will be those photos that will be analyzed back in the crime lab. Again, what is looked at are the individualities associated with the impression: the spaces between the teeth, wear and tear associated with the teeth, things of that nature. That can only be done by a trained forensic deontologist.