How to proceed with front crown that has recently come loose and dentist broke post while pulling it off? (Photos)

definitely an implant at this stage, any more attempts will be a waste of time.
I don’t think it’s the Dentist fault as I can see from the photos that the tooth was structuraly compromised and the dentist tried to keep it together to get as much as they could out of the tooth.

I would suggest an implant at this point. Any further treatment to the existing tooth will further weaken it and would have a poor prognosis. Sometimes when you have to go to such lengths to restore a tooth, it fails. These things can be unpredictable. I don't think it's anyone's fault.

It has been 5 years and looks to me the original post wasn’t long enough. Looking at the X-ray, the tooth can be restored with a longer post and a new crown. The original dentist didn’t break it, the old crowned tooth was already loose. He just finally snapped it off. The internal support for that tooth was already defective, it’s like a car bumper already broken and half dangling dragging on the road when you drive and the mechanic just ripped the whole bumper off. Did the mechanic break the bumper? No.

Hi Nate, I can feel your frustration especially after two root canals and two crowns on the same tooth, not to mention the post(s). I'm also certain that your dentist is also upset especially if he is younger. I've been around quite a while and have seen this exact scenario many times. Here is what has happened: Once your original root canal was done, the tooth lost its nutrient supply as part of the procedure. In time the tooth became increasingly brittle. A metal post was placed to reinforce the tooth. Recently the tooth fractured horizontally at the level of the bone but the crown did not fall out because the post held it in place. Germs migrated into the crack and fermented sugars in your diet creating that foul smell/taste. When your dentist removed the crown, the all ready fractured tooth with the post came with it. Happens quite often on teeth which have had root canals. You now have many choices, but only one really good one and that is to remove the fractured root and place a new crown supported by an implant. This solution will be very predictable and should last the rest of your life. Any attempt to salvage that piece of root and build another post and crown, will eventually fail as did the others. Do the extraction and implant, and then move on with your life. Sorry that I don't have better news, but don't blame your dentist. He didn't break the tooth.

From the images you have submitted it certainly looks as if the original ‘post ‘ was more like a very short core. I suspect that a new post can be done and then a new crown. Only if the dentist is unable to access the canal to pace a new post, would I then suggest an extraction and an implant.