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A quote from the article: "So far, teeth have been regenerated in mice and monkeys, and clinical trials with humans are underway, but whether the technology can generate teeth that are nourished by the blood and have full sensations remains to be seen."

I understand the vital importance of pain as a signal that damage has occurred or is occurring. One of the real design flaws in the body, however, is the inability for humans to consciously shut off pain (at least temporarily) after they are aware of it.

The pain from a severe toothache is one of the worst sensations possible, and doesn't seem to accomplish much. If dental regeneration can become commonplace and relatively cheap, I think I would prefer new teeth without nerve endings and "full sensations."