That’s the part I can’t figure out! I think diagnosing of tongue tie is more common now then it was when I was a baby. In the early 80’s, unless the tongue tie was bad enough to prevent the baby from feeding, they probably just said “Meh, good enough”. But it’s weird that it wasn’t called out in my dozens of other dentist visits over the years! I had no idea I was supposed to be able to reach my back edge my molars!