What are these on my teeth?

[Trace36]

Hi! I am a 21 year old male who has had braces in the past. My two front teeth are lower than my other teeth and they also have these grooves in them (they kind of look like mamalons) I was wondering what these were and if it is possible to get rid of them (likely from grinding them down)

 

[MattKW]

They're not grooves, but rather accentuated enamel allowing shine-through. Assuming there's nothing else involved than what I see, then the simplest solution is to place some opaque composite over the outside incisal 1/2 of those teeth.