I'm 20 years old, drank soda for all my life and never really brushed my teeth at all up until a few years ago. Because of my neglect, I had my front four upper teeth decayed near the gumline that had to be filled in. My teeth are a noticeable yellow color, and I went to get them whitened and was given a bleach tray but didn't respond very well to the treatment (didn't notice much of a difference). Would having laser treatment or something similar to in-office work be better, or can my teeth not be whitened for some reason?
Also, my two front teeth are very transparent, giving them a weird fuzzy looking at the edges of them. Is this something that would be less noticeable if my teeth were successfully whitened?