@jbaxer It is very possible that they reinjured it. I recommend seeing your vet right away. There are many possibilities, but CCL injuries have a pretty high chance of going wrong.
Losing use of a leg will in no way impact his longevity, though.
@grounded I would try r/askvet if you haven't already.
Also see if you have a veterinary school near you! Sometimes they offer services at a lower rate. You'll likely need xrays to determine if the tooth has to be removed - it may not.
@colwyn I second the single post. We're attempting to consolidate the two stickies right now to make room for this, so having the results in one thread - maybe under a big comment like "POST YOUR RESULTS" so that everyone can see. Maybe even a few days in advance to the end of the month?
@colwyn I just taught this trick as a replacement to multiple clients who have large dogs and tend to bowl over relative's kids.
Also teach this to my service dogs for approaching small/fearful dogs.
You can apply it to more than just situations where you show off cute tricks :)