Somehow I got a feeling that the low, high or non-existence of elk/moose incisors found in the graves wasn’t due socio-economic status.... I would (if I was a gambler) wager that the people with more teeth, were the tribe’s hunters. And they used the teeth as buttons.. decorative, but utilitarian. Hence finding family groups’ graves, would have same technique grooving amongst the family.
The graves with no incisors, would be gatherers, farmers, fishers. Likely used wood buttons/toggles on their garments.
But then, I’m not a researcher either.