Question 180 (part 2) · LDEK · Cast partial dentures
Supragingival retentive arm runs in the following way:
- A. from the gap of proximal zone to distal, undercut is in the distal zone.
- B. from the gap of distal to proximal zone, undercut is in the proximal zone.
- C. to the tooth surface only actual part of the arm adheres.
- D. indirect part of the arm runs above the gingiva.
- E. answers C and D are true.
Hint
A bar-type arm approaches the undercut from the gingival side instead of encircling the crown.
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