INDIRECT RETAINER Most commonly used in Kennedy class I, II & IV -ie. Distal extension cases They have the most tipping tendency and need both tooth + tissue support Resistance by preventing lifting off of the distal extension through First order liver principle(see-saw principles) The rest should be fabricated at 90 degrees away and anterior to the fulcrum line Should be placed as far as possible from fulcrum line. Types: auxillary rest — google (PM/canine) -- o Lingual plate major connector + indirect retainer -- o Canine extension from mesial rest

Ver todos los episodios