Unless oral hygiene is neglected, the color, shade, and brightness of your teeth won't change. However, if good brushing and flossing habits are not maintained, then staining can occur. It does become a little more difficult to keep the teeth clean and plaque free when you have braces on...as a rule of thumb, I tell my patients to brush three times a day, and for three minutes each time. If you get in that habit, there will never be any staining or discoloration.
Hope this helps!
In order for Invisalign to work optimally, the aligners should be worn all the time except mealtime, and while brushing your teeth...so 20-22 hrs out of 24 is best.
The teeth/smile is one of the first things you notice about a person. Orthodontics is important not only for esthetics, but also for function!
If it's a gum (or periodontal) issue, it can likely be treated with a grafting procedure. If it's a problem with the bite, or the tooth has moved out of position, then it can likely be treated orthodontically.
Hope this helps!!