Root canal or extraction?

Got a tooth that needed a gap filled between the crown and base of tooth. All well and good UNTIL the pain started. I thought maybe that was a response from not using novacaine. Well, no, there is an infection. Okay, got antibiotics going but the end game decision is: do you want a root canal or pull the tooth. Since it's the last tooth on the left, I'm leaning toward pulling it. If the 3 Stooges were in town, they would probably just knock it out. Anybody been in the same spot? What did you do and were you happy with your decision? Thanks!