How reliable is this? I've been told that even sending them to a lab specializing in cementum annuli will only get you 90%-95% accurate results. Also, I've been told that just the process of removing an incisor from a jawbone can damage some of the growth rings. I just find it hard to believe that the method you outlined can provide truly accurate results consistently. If you're not guaranteed 100% accurate results from a lab with highly specialized equipment and personnel, I question what one could do in the backyard with a saw, some sandpaper, and a magnifying glass.