The birthday of organized dentistry in York County occurred on September 5, 1909. In the evening of that day a small group of enterprising dentists gathered at the office of Dr. H. Elmer Trostle for the purpose of establishing a dental society. Dr. Trostle was elected as the President. The executive committee included Drs. J. W. McKinnon, A.M. Geesey, J.Reichley, C.N. Trout and W.S.Eisenhart. A constitution and bylaws were adopted. The official title of this group was the "York County Odontological Society."

Expenses apparently were not a major item. The first year's expense was $4.90. With a total of $27.00 in the treasury, it was decided to suspend dues for the ensuing year. On March 3, 1910 the York County Odontological Society became a component of the Pennsylvania Dental Association. On or about that date, the Society was comprised of 39 members some of whom were from Hanover. Currently, the York County Dental Society boasts a total membership of 157. 

Thanks to the foresight and historical inclination of the late Dr. James MacBride, Sr., hand written minutes of the genesis of organized dentistry in York County and of the early struggles by our forebears to form the first dental group has been preserved from oblivion.