Keep (Harvard, M.D. 1827) served as the first dean of the Harvard Dental School from 1868 to 1872. He had an extensive practice and devised a method for making porcelain false teeth. At the Parkman-Webster trial of 1850, he identified a set of teeth he had made for his patient George Parkman, providing the expert testimony which convicted John White Webster of murder.
From the description of Papers of Nathan Cooley Keep, 1817-1834 (inclusive), 1824-1834 (bulk). (Harvard University). WorldCat record id: 281435080