Quiz #4-Key. Tooth Borne RPD List some advantages of an RPD (over other modes of tooth replacement). Leave abutment teeth in original condition Oral hygiene facilitated Cross arch stabilization and support Esthetically more acceptable; replaces lost bone and soft tissue contours.
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Quiz #4-Key Tooth Borne RPD • List some advantages of an RPD (over other modes of tooth replacement). • Leave abutment teeth in original condition • Oral hygiene facilitated • Cross arch stabilization and support • Esthetically more acceptable; replaces lost bone and soft tissue contours
Tooth borne RPD con’t • List some disadvantages of an RPD. • Less acceptable psychologically. • Prosthesis can be damaged during handling • Bulk and tissue coverage may be problematic • Clasps in display zone can severely limit esthetic acceptability
Tooth borne RPD con’t • What type of major connector is usually preferred for tooth borne RPD’s on the maxillary arch? Palatal strap • A bar clasp, which is usually confined to the gingival 1/3 of an abutment tooth, may be less visible than a circumferential clasp.
Tooth-mucosa borne RPDs • Distal extension RPDs fall within Kennedy Classification 1 and 2. • Bilateral distal extension base will move toward the soft tissue during occlusal loading; the RPD rotates around the fulcrum line axis.
Tooth-mucosa borne RPDs con’t • Movement of a distal extension RPD around a vertical axis, near the center of the arch, occurs during horizontal or lateral loading. • List some clasp assemblies that provide stress release: • RPI • RPC • Wrought wire
Tooth-mucosa borne RPDs con’t • Why are rests in a stress releasing clasp assembly located in the mesial fossa of abutment teeth? To direct rotational forces so that the components of the clasp disengage from the tooth during mastication.
Tooth-mucosa borne RPDs con’t • What are contraindications for an “I” bar clasp? • Insufficient vestibular depth • Deep tissue undercut • Lack of facial undercut • Mesial inclination • Use of a lingual plate.