Online court documents show two felony counts of endangering the welfare of children and a misdemeanor charge of recklessly endangering another person were withdrawn against 29-year-old Valerie Fullum.
Fullum's attorney, Steve Townsend, said that the girl was never forced to get the implant, and that story was fabricated by others who wanted to discredit his client.
Fullum lost her job during the ordeal and although she feels vindicated, she must now work on mending her reputation, he said.
"She wants to let everyone know she is not this villain that she was portrayed to be initially, and she just wants to move forward," he said.
Mike Manko, a spokesman with the Allegheny County district attorney's office, said he couldn't offer any details about why the charges were dropped.
"We withdrew because in the course of continuing the investigation, we can across an evidentiary issue that we could not overcome," he said.