Which of the following are true concerning resin-bonded bridge designs?
1. Contraindications would be mutually protected occlusion (with a canine guidance), more than one pontic, and bruxism.
2. A cingulum rest or an occlusal rest is needed to provide a vertical stop.
3. A single path of insertion, with parallel grooves.
4. 120o of encirclement with a centric occlusal contact only.
5. Resistance form, a shallow chamfer at a depth of .25 to .5 mm.
a. 1,2,3 are true.
b. 3,4,5 are true.
c. All are true.
d. 2,3,5 are true.
e. 1,3,5 are true.
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