Some gum tissue "died" after veneers prep. Is this normal?

You should let your dentist look at the gum tissue to verify it is normal. The gums can be dark for so many different reasons. It is most likely trauma from the procedure but it never hurts to have the dentist look!

Without a
thorough exam or some photos at the very least, it would be impossible to
advise you as to the best possible treatment options.
Best of
luck.
James
Asaf, DDS

Gum "death" is not typical unless there is trauma, or periodontal disease. Trauma can be from instruments, the high speed, gingival retraction cord, etc. As long as you are healthy, and have adequate bone support underneath the gum, you have a HIGH likelihood that the gum will grow back. Decades ago, a Scandanavian study was performed where they completely cut out the gum (papilla) between the anterior incisors, and watched how it would grow back, for the thrill of it. (I don't know how such a study would pass today's standards for research). Anyhow, +90% of the gum grew back. Why? THE BONE SETS THE TONE.More recently, there has been scientific research to quantify: As long as the crest of the bone is 5mm, or less, from the point where the two teeth touch (inter proximal contact), there is almost a 100% chance that the gum will grow back. The greater the distance from the bone to the contact point (i.e. >5mm), the less likely it will grow back. When the distance was 6 mm, the papilla was present 56% of the time, and when the distance was 7 mm or more, the papilla was present 27% of the time.Consult your local dental professional for any questions related to your care. Hope that helps!