CDT :CDT comprehensive Exam: Questions & Answers: Updated A+ Score Guide Solution

What is the commercial name for a prefabricated hinge and lock system that can be substituted for clasps in an RPD framework? (Ans- swing-lock Which of the following is the correct definition of retention? (Ans- ability to resist removal of the RPD in an occlusal direction Why should wax be removed from the clasp arms before processing? (Ans- keep clasp from becoming embedded in acrylic Which of the following statements is correct when electropolishing a partial? (Ans- The cathode is the negative pole on the machine Which is a BEST process to relieve the clasp of strain during the recovery process? (Ans- use a sharp knife to cut away the stone tooth under the clasp When boxing an impression, where should the top of the boxing wax representing the base of the cast be? (Ans- 15 mm above the highest point of the impressionWhich wax is MOST ideal for dipping refractory casts? (Ans- beeswax What is the correct term for describing the diameter of a metal wire? (Ans- gauge What are three MOST important qualities of a master cast? (Ans- accurate, dense and strong When may auxiliary sprues be indicated? (Ans- when there is a large isolated clasp on a molar abutment Why is a dry master cast NOT desirable for duplication? (Ans- would cause difficulty in its removal Which is not a bar clasp assembly? (Ans- hairpin Which side of the wax should you use the hot spatula on when sealing the beading wax to the impression? (Ans- the side farthest from the peripheral roll of the impressionWhat color is reserved for outlining metal parts of the RPD? (Ans- brown Which is not a general guideline for placing a rest on a metal based partial? (Ans- A clasp assembly never has a rest associated with it. What color is used on a master cast to outline the extent of acrylic resin denture base coverage? (Ans- blue Why is it important to ma