MECHANICAL PRINCIPLE IN TOOTH EXTRACTION
1.LEVER PRINCIPLE OF FIRST ORDER :- - It has three basic component :- fulcrum - effort - load - To gain a mechanical advantage, the effor arm on one side of fulcrum should be longer than the load arm on other side of fulcrum. - APPLICATION 1.Forceps - to gain a mechanical advantage grip should be farther from the fulcrum ane the blade should be shorter. 2.Elevators - handle of the elevator represents the effort and working end which engages between the teeth represents the load. - MECHANICAL ADVANGAGE OF LEVER IS = 3.O 2.WEDGE PRINCIPLE :- - effort is applied to the base of the plane and resistance has its effect on the slant side. -APPLICATION 1.Forceps - tip of forceps inserted between the mucoperiosteum and surface of tooth, beaks are inserted further, the bony socket expanded and result in slow seperation of periodontal ligame
