RPD Review Questions
Incorrect. Lingual
I-bars can ONLY be used on lower molars.
Incorrect. A Roach
clasp is an infrabulge clasp that generally utilizes a facial
undercut---like an I-bar or modified T-bar. This type of clasp cannot
be used here because there are no facial undercuts---infrabulge
clasps cannot be used on the lingual surfaces of premolars.
Incorrect. An
"Akers" clasp is a circumferential clasp. A conventional
circumferential clasp cannot be used because there are no facial
undercuts.
Correct. The half
and half clasp is appropriate for the circumstances described in the
stem of the question. Because this type of clasp neither totally
releases during function nor exhibits great flexibility, its use is
reserved for those rare cases where almost no other options
remain.
