He was wealthy enough in later life to afford travel as a letter of introduction survives in the correspondence of Benjamin Franklin describing Berdmore's visit to Paris.
London., to Benjamin Franklin 1784 August 26 - Introducing Mr. [Thomas] Berdmore, the celebrated dentist, who goes to Paris on a pleasure jaunt.
[1] A marble plaque in the church of St Mary the Virgin, Nottingham, records how Berdmore "acquired a liberal and ample fortune by the profession of dentist.
His book is entitled: A treatise on the disorders and deformities of the teeth and gums: explaining the most rational methods of treating their diseases: illustrated with cases and experiments, by Thomas Berdmore, member of the Surgeons Company, and dentist in ordinary to His Majesty.
London: Printed for the author; Sold by Benjamin White ... James Dodsley ... and Becket and De Hondt ..., 1770.