Chapter 43
What is an alloy?
a mixture of 2 or more metals
Which type of stimuli results from thermal changes?
Physical
Which type of cement is permanent cements?
Luting
True or false: Models created from impressions are a negative reproduction of the structures
False
Which type of wax is used to form a wall around a preliminary impression when poured up
Boxing wax
Which alloy power gives amalgam alloy powder its strength?
Silver
What is the smear layer?
debris leftover after preparation
True or False: Liquid should be dispensed first when mixing cements
False
What are the three classifications of impressions?
preliminary, final, and bite registration
What is one of the lab rules?
answers will vary
Which type of stress and strain is biting a piece of taffy?
Tensile
Which type of liner, base or varnish stimulates reparative dentin?
Calcium hydroxide
What should a cement that has an exothermic reaction be mixed on?
Cool glass slab
Which alginate expands or absorbs water what is the term for this process?
Imbibition
Which type of equipment would we use to construct custom trays for bleaching, mouth guards, and positions for ortho?
Vacuum former
What is the ability to hold 2 things together when they will not adhere to each other?
Retention
Where is a base applied in the preparation?
Pulpal floor
Which cement is versatile as non irritating under composites, amalgams, and as an intermediate or temp restoration?
Polycarboxylate
What is the most popular material used for bite registrations?
Polysiloxane
Which dental lab equipment is used to remove air bubbles from plaster or stone?
Vibrator
Which classification defines cavities on the proximal surface of anterior teeth that do not include the incisal edge and which type of material would we use?
Class III - composite
Which type of base is selected for insulating and sedative properties?
ZOE
If excess cement is not removed from in and around the gingival margin and sulcus of a tooth what can the patient experience?
Inflammation of the tissue and discomfort
Name an anatomical landmark found in the mandibular impression.
Retromolar, lingual frenum, tongue space, and mylohyoid ridge
What are the two parts of a study cast and describe what they consist of.