The Surveyor is a dental instrument used by dentists and dental technicians to see the existing relative parallelism between the teeth and different dental structures that may serve as a denture abutment.
Surveyor is also known as Parallelometer, Parallelizator or Analyzer. It was invented on 1918.
1. Fixed base (on which the column is attached).
2. Column, (maintains the arm).
4. Instruments tray.