In clinical class in oral surgery, principles of elevators were discussed. The students were elaborated the instruments used for tooth extraction. Elevator is an instrument used in minor oral surgical procedures. It is used to luxate the tooth from socket prior to the application of forceps and to expand bony socket there by aiding in tooth extraction, to reflect mucoperiosteum, luxate tooth , luxate and remove tooth when forcep engagement is not possible and to remove fractured or carious tooth. There are three mechanical principles which are applied to increase their mechanical advantage:
a) Lever Principle
b) Wedge Principlec) Wheel and Axle Principle.