Tooth regrowth along with bone regrowth and many other regrowth functions is dependent on hormones and electric fields.
I took pregnenalone and DHEA during that time, along with minerals and occasional zapping of the area. Those are the main precursors of almost every hormone made in the body. Also, Melatonin is beneficial.
Also took certain other things associated with general health, such as Milk Thistle, NAC, ALA, and full flush Niacin.