The use of closed circuit television in the teaching of dental technology

A low cost, single-operator, four-camera, closed-circuit television system was developed to teach dental technology to large classes (120) of second and third year (pre-clinical) undergraduates. Its use permits demonstrations to be conducted, recorded and played back, with no electronic knowledge, little training, and a minimum of preparation and assistance. The field of view is from above the demonstration table, and is selected by pushing button in the size range, 30 cm x 20 cm down to 3cm x 2cm. The system has many advantages, few disadvantages, is reliable in operation, and is acceptable to students.