[anonymous]

Panting and pacing look like anxiety but can also be signs of pain and discomfort.
Regarding the dental, were dental x-rays done? Before? After?
Because root remnants can be left behind causing pain/inflammation/pain.

Something is wrong….. The effects of anesthesia do not last more than a day or two.

So, I would make a return trip to the vet that did the dental surgery and discuss. Request a follow-up visit and exam (some vets won’t charge).
If he still thinks it’s anxiety, ask about treatment options. Maybe prescription medication (short-term) would help? No need for the dog to suffer.

PS: If you are feeding raw or adding any supplements, please inform the vet. This will help him to diagnose.