Alfred E. Gysi
Dentist Supply Company of New York
The GYSI "Simplex" is an "Average Value" instrument, that is, the rotation centers, condylar guides, the incisal guide are fixed to "average" settings. The "Simplex” articulator was the average value version of the Gysi "Adaptable", a highly adjustable instrument produced in 1912. Gysi felt compelled to produce this instrument because of competition in the market place and dentist's demands for simplicity. Gysi believed that with the "Simplex" the dentist could provide efficient denture service without the need for "scientific equipment". Gysi believed that the "Simplex" would be acceptable in 80% of the cases.
JP Articles Volume 10, No. 1, March, 2001, pp. 52-60.
JP Article Volume 11, No. 2, June, 2002, pp. 134-146.
Dr. Edgar N. Starcke's articles in the Journal of Prosthodontics have more information on the history of articulators.