Hi , Root canal is usually performed when the inner portion of tooth is damaged. It is completed by placing a filling in the tooth. A Fixed Cap is recommended inmost cases as it increases support to filling and dissipate forces of chewing over larger area hence improving success
There are few types of crowns, the doctor can give his recommendation after checking what suits best - based on area, strength, bite , color
Broadly material can be Metal/Alloy (Dark substucture) based or Zirconia ( White) Substructure based
Life depends on original condition, Diet, Masticatory load and most importantly how well you clean the area
Next Steps
Should ask the Doctor what suits you ( Patient) the best
Health Tips
With a cap in place , Do get 6 monthly checkups.