I have a 1 1/2" flat vertical scar on my left cheek, & am interested in subcision with Restylane. However, while one plastic surgeon said that this will be permanent - scar will float up & heal while Restylane cushions so it won't redepress, so when Restylane dissolves scar will be permanently in place - a couple of other dermatologists have said that repeated Restylane injections will be neccessary. Please advise. Thank you.