GUIDING PLANE.............
Function of Guiding Planes
q Retention and stability
q Intimate frictional contact of the prosthesis against these surfaces
q Limit the possibilities that exist for dislodgement
q Stabilization of abutment teeth
q Reciprocation
q Lowering the height of contour
If some degree of parallelism does not exist during placement and removal, trauma to the teeth and the supporting structures and strain on the denture parts is inevitable
q Should be
q Like an area on a cylindrical object
q Continuous and unbounded by line angles(line angles weakens the clasp assembly)
q 1 ⁄ 2 the width of the distance between the tips of adjacent buccal and lingual cusps
q 1 ⁄ 3rd the buccal lingual width of the tooth
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