Show dentists patients use stop go signs london A stop caution 11 go apparatus by which patients can reveal to the dentist exactly how they feel is the latest device for banishing fear ot of dental surgery being used in britain the patient holds the control switch in his hand while his teeth are being drilled A box containing the red amber and green lights attached to a collar placed on the shoulder of the patient shows the dentist instantly it if he should stop go cautiously or go ahead with the operation the lights first were suggested to the inventor as a joke he perfected the apparatus and found that its psychological effect was tremendous it usually gives patients so much confidence that they do not signal stop at au all |