Dr. Michael Obeng -- the plastic surgeon who freed Tessica Brown from her head full of Gorilla Glue -- is reaping benefits or his good deed ... he says patient inquiries are up a hundredfold!!!
The Beverly Hills doctor tells TMZ ... since Tessica's procedure last week -- which he did gratis -- his office has received around 5,000 calls asking about all sorts of surgeries -- although most are unrelated to glue removal.
He says callers inquire about the usual stuff -- breast augmentation, butt lifts, vaginoplasty, yada yada.