The Argentina defender's stray arm caught the 31-year-old striker in the jaw at the Britannia Stadium, but Potters boss Tony Pulis saw no malice in the challenge.
"Peter wanted to carry on. But then he saw his teeth in the doctor's hands. He almost fainted, I think.
"He has lost two and the third was stuck in his upper jaw. He's going to need some work on it. But I don't think there was any malice in it."