Dental stem cells were discovered more recently and are being studied for a number of conditions related to the connective tissues or neural tissues in the body – including type 1 diabetes, spinal cord injury, skeletal bone loss, muscular dystrophy, cardiovascular diseases such as myocardial infarction and stroke, Parkinson’s and Alzheimer’s. The first human applications of dental stem cells have been in regenerative dentistry: re-growing jaw bone and treating periodontal (gum) disease. Scientists anticipate the earliest medical applications will be for the repair of damaged tooth structures, bone regeneration, and later for the treatment of neural tissue injury or neurodegenerative diseases.

If this has been going on for as long as it appears, imagine the amount of research that they have been able to privately do on the subject. Could they be ahead of modern medicine, having a massive supply of teeth and no medical/moral/legal hoops to jump through? If we're going to assume that they are procuring children with little no issue they must have a large supply.

I see this as the same as how military tech can be 10-20 years ahead of top-of-the-line civilian tech and sometimes even 5-15 years ahead of civilians finding out the technology even exists. Imagine the testing that is possible on stem cells / adrenochrome etc. with an endless supply of young victims. These people are essentially no different than the nazis after all, in my mind it's not a far stretch to think they are trying to advance "fountain of youth" medicine at breakneck speeds..