Εlvis my labrador, one month ago had an operation on his back left leg for the same reason, the doctor followed the TTA operation, he had a very good recovery and he is fine now although we are still carefull and we will be for some time more.
I wish you the best for the operation and a fast recovery
"Dogs are our link to paradise. They don't know evil or jealousy or discontent. To sit with a dog on a hillside on a glorious afternoon is to be back in Eden, where doing nothing was not boringit was peace."