Crown or Veneer for Root Canal Tooth?

The standard/rule of thumb answer is: crown. After a tooth is hollowed out to clean out the affected nerve, the tooth is weaker and likely to fracture. Covering up completely is best.
If the access hole is small, sometimes nothing is needed, but the lower front teeth are so small that small holes are still very large (by proportion). If the access was from the front of the tooth, a veneer might work.
So truly, the best person to ask is a dentist that is right there looking at the situation.

Classically, all teeth treated with root canals should get a crown. So if you have been recommended getting a crown, there is nothing wrong with the recommendation, "technically" speakingIn a more contemporary view, we have research that shows that with endodontic therapy, you have higher success rates with the tooth, if there is more tooth structure remaining--- it depends how much residual anatomy is left over. If the endodontic access was very small (micro), some teeth (such as teeth #s 23,24,25,26) are candidates for just a composite resin. However, most teeth that receive a root canal have significant damage and would require a crown, or an onlay to help better distribute the forces of mastication (chewing). In general, posterior (BACK) teeth benefit from full coverage restorations. A 10 yr followup study found that POSTERIOR teeth that DID NOT receive  full coverage crowns were lost 6X often when compared to teeth that DID receive full coverage (Aquilino et al). Answer depends on how much tooth structure is left based off of 1) how deep the original decay was, and 2) how conservative access for root canal instrumentation.As with all information on the internet, seek the consultation of you local dentist prior to choosing treatment.Hope that helps!

I don't think you could go wrong choosing to have a crown done on a root canal tooth. You might get away with a veneer only if there is very little tooth structure missing. As far as internal bleaching, you usually only need that if you aren't doing a crown.