My teeth broke off at the gum line after a root canel -- what procedure will allow these teeth to still be fitted with a crown?

For a broken tooth at gum line, need to see xrays to determine root canal integrity, where the fracture is, and how long is the root and how much bone you have plus other important factors....Generally for broken tooth at the gum line cast post and core is recommended plus a crown to salvage the tooth, in some occasions crown lengthening surgery may be required, which is worth vs extraction and dental implant!

Hi:Without an X-ray it is difficult to give you accurate advice.  Generally, post build up and a crown is the only possible way to save the tooth.Best,Dr. Maddahi