Prosthodontics & Occlusion · single question

For a Kennedy Class I removable partial denture (bilateral distal-extension/free-end saddles), the fulcrum line generally runs:

Through the most posterior/principal abutment teeth bilaterally — the rotational axis around which the distal extension bases can tip
Along the midline of the palate only
Through the anterior teeth only
There is no fulcrum line concept in a Kennedy Class I case

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Correct answer: A. Through the most posterior/principal abutment teeth bilaterally — the rotational axis around which the distal extension bases can tip

With bilateral free-end saddles and no posterior abutment, the RPD framework can rotate (tip) around an imaginary fulcrum line connecting the most distal abutment teeth — understanding this rotational tendency is key to designing indirect retention and appropriate clasp/rest placement to resist it.

Practice Prosthodontics & Occlusion questions Prosthodontics & Occlusion study notes

For a Kennedy Class I removable partial denture (bilateral distal-extension/free-end saddles), the fulcrum line generally runs:

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