Congratulations on your new little fur butt.
She is adorable. I bet she will bring such joy and love into your lives. I don't have any idea of her age, and with her teeth problem it would be hard to guess. I think you should forget about the time before she joined her new family. She is starting over, and every day will be more special than the next. Yorkies are capable of giving boundless amounts of love, and your new baby has a million reasons to give it to you and your family. This is the start of a fresh new life for her, and a very fulfilling one for you and your family.