From the pictures I don't understand very well what's the situation but seems like you have a piece of base that has gone over the edges teeth, correct me if I'm wrong...anyways for me there are two options:
A-try to pull out the base so that you can glue everything up again with epoxy
B-cut the piece of base that is stuck then glue everything up and repair the hole that you've created with ptex or similar.
The tip seems completely delaminated so you probably want to use a support when gluing with epoxy ( like some wood scrap or metallic plates to uniform the pressure)
Hope it helps.