I came across the following abstract that may be of interest
to some readers of this list:

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8572155&dopt=Abstract

The article describes dental disease in wild adult orangutans, using
skeletons from wild orangs harvested in the 1890's.

As always, I suggest reading the entire article.

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Tom Billings