Typical situations where a rotational path RPD may be used

By Dr.Swathi Pai on Saturday 17 January 2009 with 0 comments



  1. most common is the KIV

  2. KIII with bilateral missing first molars, tipped 2nd molars and a clasp needed on #s28 & 29.

  1. Where the first bicuspids are missing bilaterally with an undercut on the distal of the cuspids.

  2. A unilateral rotation side to side.

  3. It requires a 0.1mm undercut on the anterior abutment and a .020 undercut on the facial of the molar abutments.


The study cast is surveyed with a 0 tilt (second path) to determine adequacy of undercuts on the mesial surface of the anterior abutments and the distobuccal surface of the posterior abutments. The anterior (first path) path of insertion is determined by tilting the cast upward until the undercuts on the mesial surfaces of the anterior abutments are eliminated.

Category: Prosthodontics Notes

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