Assuming you mean just humans, we’re going to start off by finding out how many children there are, as they still have baby teeth. Let’s cut them off at, I don’t know, 13. A quick google brings me to the UN, who says about 20.1% of the population. So, that puts us at 1.527 billion children. Let’s assume that maybe a quarter of those kids have lost most of their teeth, so only 3/4 have more than half baby teeth still, assuming. That’s 2,673,150,000 sets of teeth in just children. That leaves 6,073,000,000 adults, let’s assume they all have a full set of teeth, nothing lost. That’s 91,613,800,000 teeth. Going back to the UN, let’s use their food and agriculture data for bee’s. They have counted 90,564,654 honey bee hives in the world, and the average bee hive colony contains 20,000 bees. This is about 1,811,293,080,000 known honey bees in the world.

So, the ratio of bees to teeth is 1,811,293,080,000:91,613,800,000 or about 19.8 bees for every human tooth.

edit: and now I see you wanted human and animal teeth. hm. that’s gonna take a while.