Does the Possibility of Having a Root Canal Decreases After Getting a Crown?

It sounds like your dentist's advice was accurate.  It is not necessary to do a root canal every time you do a crown.  Some teeth will do fine after a crown and may never need a root canal.  When we realize that the decay is "dangerously close" to the pulp, we will advise a patient of this status.  A tooth with decay is a sick tooth - anytime you mess with a sick tooth, there is a risk that the tooth will have trouble settling down.  Ideally, the restoration will feel fine once the anesthetic wears off.  Like a bruise, however, it could take a short period of time for it to completely resolve and feel all better.  When a tooth persists with symptoms after a filling or crown, then an xray would help determine if further treatment is necessary.  And, by the way, if there is question as to whether the pulp will react, it may be an option to "temporarily" cement the crown for a week or so to see how the tooth does.  That way if a root canal is going to be indicated, the crown is easily removed to allow access to the canal rather than going through a permanently seated crown.
 

Any time a tooth is treated their is an increase in the likely hood of needing a root canal. Nerves in the teeth can be damaged with any type of trauma creating the need for a root canal good luck

 

Kevin Coughlin DMD, MBA, MAGD     CEO Baystate Dental PC

If the cavity is deep and it is touching the pulp, I will not make a crown right away after placing filling. I will wait 6-8 weeks to evaluate the tooth. If the tooth is not sensitive and it is vital, I will make a crown. If the tooth is sensitive or if the pulp is not vital, I will do root canal first then make acrown.