One technique is to cleft graft the trunk of the broken tree to another pear variety or to the same variety. Many people will advise against growing flowering pears for a number of reasons. They will likely comment explaining why not to grow them. I will attach a link to a youtube video demonstrating the cleft method. Another method is rind grafting. You might entertain the idea of making it into a fruiting pear instead of flowering pear.

Here is a link that might be useful: Cleft Grafting method

Looks like it had a weak spot, perhaps the graft union.
All you can do is to cut it off, ..it will shoot out, if it's a grafted tree, you'll find out over time if it shoots out above or below the graft.
You might want to stake trees for some years until established somewhat.