Mr Speivak's brother Alan - who was working in the field of regenerative medicine - sent him the powder.
For ten days Mr Spievak put a little on his finger.
"The second time I put it on I already could see growth. Each day it was up further. Finally it closed up and was a finger.
"It took about four weeks before it was sealed."
Now he says he has "complete feeling, complete movement."
Vídeo da reportagem no link
Via BBCNews:
http://news.bbc.co.uk/1/hi/health/7354298.stm
