One of the factors that some researchers believe might contribute to the possibility of pano is calcium supplementation.
One thing I personally have never considered, panosteitis or not, is a calcium supplement. A dog's most important micronutrient ratio, IMO, is the calcium/phosphorous ratio. Oversimplifying, that would be the ratio of bones (calcium) to meat (phosphorous) in the dog's natural diet.
Since pano presents with abnormally dense bone area, I would want to hear a very good explanation of why extra calcium, a bone-building material, was warranted. (Good instinct, Ken.)
Is your dog's pano related to the growth spurts? (Pano in dogs and in children is often called "growing pains.")
Some people believe at the moment that low protein, low calcium diets may prevent this condition. I've never seen authoritative research to indicate this. Something that makes more sense to me is a balanced and normal diet with less food given. There are a few reasons for this: Dogs who grow slowly and steadily seem to have much lower pano occurences; dogs who have a little too much weight seem to be more prone to it.
As mentioned earlier, some reduce the diet, while keeping it balanced, and fill in with low-calorie, low-sugar produce to keep the dog from being too unhappy with the decreased amount.
It is, of course, self-limiting. At that age, your dog is approaching the usual 14-month (approximately) cutoff. That's not 100%, but I understand that it's pretty reliable.
I think the advice about limiting exercise during pano is probably good, because it's an ailment of inflammation. Inflammation isn't a good thing for any part of the system.
If your dog isn't already on Omega 3s in the form of salmon oil (plus Vitamin E), I'd start it. It won't have the same direct benefit the way it does for OA and other joint disease (and many other ailments), but it is a potent anti-inflammation agent with no downside, so it can be of some benefit.
If you are trying to choose pain meds, I can link you to info, if you want.
All JMO. I'm not a health professional.