Although a basic axiom in orthodontics is that "bone traces tooth movement," the ratio of bone modeling to tooth movement varies according to the direction of orthodontic tooth movement.
Use of inorganic compounds, which are present in bone as trace elements and known to be involved in processes related to bone formation and remodeling, as additives to synthetic bone graft substitutes is a potentially interesting approach to improving their biological performance.
"It would be great to have solid evidence of humans," whether through bones or trace amounts of ancient DNA left behind in sediment cores, Shapiro says.
Insects can modify bone, but traces left by dermestid beetles are small and characterized by minute scratches left by the mandibles; termites produce meandering tunnels [21].
His analysis of the animal bones there traced the shift from intensive and communal hunting of gazelle, using stone enclosures to trap them, to sheep- and goat-herding.
Among other things, scientists want to scrape the plaque off Kennewick Man's teeth to get an idea of his diet, to search his bones for traces of DNA and to compare his skeleton with others.
The same areas held pieces of large cooking pots and animal bones and traces of wheat, barley and oats for what must have been a bakery and also probably a brewery.
