Has anyone been able to reconcile with estranged adult /teen daughters? What is your secret?

My daughter didn't speak to me for about 3 years from the age of 16. Her father is a controlling narcissist and brainwashed her against me and her 2 siblings. I didn't get emotional with her, despite the pain of it being the worst thing ive ever felt. I kept the door to communication open and when she gradually started to speak again I kept things very light and cordial. You can't force it, all you can do is stay open and willing to heal things when they do approach you. We now have a great relationship and she finally sees her father for what he is.