WorksheetsChapter 5: Laboratory
Total questions: 28
Worksheet time: 1hrs 24mins
Salivy flow is affected by:
drugs
diet
thoughts
all of the above
Which microbes can be found in the oral cavity
bacteria
fungi
viruses
all of the above
The largest component of amalgam alloy is:
gold
lead
zinc
mercury
In nitrous oxide systems the oxygen is color coded:
green
yellow
blue
orange
If a blood pressure registers 148/60, the number 60 represents:
the systolic pressure
the diastolic pressure
the diabolic pressure
none of the above
Which of the following would be the most NORMAL systolic pressure for an adult?
70
120
80
90
NORMAL respiration for adults is how many breaths per minute?
10-12
14-20
17-20
20-30
Calcium hydroxide is commonly used for:
permanent cementation
thermal insulator
pulp capping
cavity varnish
Items used to cover badly stained teeth and to reshape the anatomy of a tooth is called:
braces
hyperemia
wedge
veneers
Plaque control is taught:
by lecture
by demonstration
by demonstration , by demonstration and having patients perform
on model, by demonstration, by lecture, and by demonstration and having patients perform
The margins of temporary crown should:
be below epithelial attachment
be smooth and white
be 2 mm occlusally
protect margins of preparation and may be smooth
The highest number on the vitalometer indicates:
there is little feeling in the mouth
hyperemia
a healthy pulp
the tooth is non-vital
Zinc oxide and eugenol is used as a :
thermal insulator
sedative base
temporary restoration
any of the above
Alginate is used to:
take x-rays
take impressions
ease the patient
fill a cavity
Which wax is not used intraorally?
sticky wax
utlity wax
baseplate wax
none of the above
Which product undergoes an exothermic reaction without getting chemically involved?
gold foil
amalgam
plaster
zinc-oxide-eugenol
The oldest impression material is:
impression plaster
irreversible hydrocolloid
metallic oxide paste
silicone impression material
Which of the following is NOT part of the anatomic portion of an orthodontic model?
teeth
arches
supporting tissue
base
A material that speeds up a chemical reaction without becoming chemically involved is called:
a solvent
a base
a catalyst
thermoplastic
An impression is:
negative reproduction of oral tissues
flexible model
metallic casting
positive reproduction of a prepared tooth
A dental - lathe is used to
cure
cut
polish
suction
A source of energy for a handpiece and various rotary instrument sis:
dental lathe
dental engine
gas touch
articulator
Which of the following is NOT a common duty a dental assistant might perform in the laboratory of a dental office?
construct copings
cast metal restorations
write the laboratory prescription
sign the loboratory prescription
Which of the following is NOT a step taken to prevent the transmission of disease from the laboratory to the office?
rag wheels should be soaked in disinfectant
effective vacuum system should be used for grinding an appliance
pumice with a disinfectant mixture and water may be reused
appliances should be disinfected for at least 10 minutes
Which of the following will not be prevented with the use of a mouth guard?
oral lacerations
tooth injury
jaw fractures
potential concussion
Cohension is a molecular attraction between:
similar molecules
a denture and the oral mucosa
different molecules
irregular surfaces
Water cooled trays are used to carry which impression material?
silicone
mercaptan
reversible hydrocolloid
impression plaster
When mixing mercaptan and silicone impression materials:
1. They should be tempered before use
2. They must be homogenous
3. Use wiping, pressing motions
4. Use a flexible stainless steel spatula
1,3,4
2,3,4
1,2,4
all of the choices
