@Card You've already gone past what I would have recommended, which is to never pull the root unless you're absolutely sure a root canal cannot be done. But, now to go forward. I lost one of my upper front incisors (due to incompetence, IMHO) in 1999. Initially I tried the implant, but my bone structure in my sinus area was too thin to support one (in fact while doing the prep my dentist actually drilled into the sinus cavity above that tooth area). I've had to resort to a bridge, which I am still using since 2015. It's a zirconium oxide bridge and it has been absolutely the best decision I've ever made (and I've been through all the options).
Sadly once they pull those roots your options are only 3, denture, bridge or implant.
(BTW, the other front tooth broke off at the gum about a year later, which now has a root canal with posts to complete the abutment on one side of the bridge. The abutment on the other side includes one incisor and one canine. My front 2 teeth broke playing American football when I was 16 (in 1969). There was still plenty of tooth remaining to just cover with crowns. Sadly, eventually the tooth under a crown will weaken and is subject to breaking off, which mine did. I was told by 2 Endodontists that my roots were too small for them to complete the procedure, so I let him to pull the roots. I was given the same story on the second front tooth. I found an independent dentist here in Bangkok and the Endodontists in his office completed the procedure.) (Thaniya Dental Clinic, located in Thaniya Plaza Shopping Center between Silom and Surawong Rds)
Good Luck with your decision.