CDT Test- General
Universal tooth #16 opposes tooth:
#17
Which of the following is a component of Infection Control in the dental laboratory?
-Aseptic Techniques. -Immunization. -Barrier Techniques.
If using bleach as a disinfectant in the dental lab, you should dilute 1 part of bleach with___ parts of water.
2
A convex surface is:
A rounded elevation.
The Lamina Dura is:
A thin layer of dense bone that lines the tooth sockets.
The __________ writes the prescription for the lab work:
ALL -Dentist -Office Manager -Assistant
Pumice used on repairs or relines must be changed:
After each use.
Which people in the laboratory must be trained in infection control?
All employees
Which of the following should be cleaned, disinfected or sterilized before entering the laboratory?
All work
The abrasive that should be used on ceramic metal where porcelain is to be bonded is:
Aluminous oxide.
The periodontal ligament surrounds the root of the tooth and connects it to the:
Alveolar bone.
The term "fossa" refers to:
An anatomical groove or depression.
Marginal ridges form the mesial and distal borders of:
Anterior and posterior teeth.
The fibers of the buccinator travel in what direction?
Anterior-posterior
A lingual fossae is found on axial surfaces of:
Anteriors
Long hair, jewelry and hats:
Are a danger around lathes, polishers and handpieces.
The roots of anterior teeth usually:
Are conical.
The Synovial cavities are located:
As part of the Temporomandibular joint.
Sodium Hypochlorite is the chemical name for:
Bleach
Micro organisms such as viruses or bacteria that are carried in blood are called:
Blood borne pathogens.
From an occlusal view, the distal contact of the maxillary first molar is:
Buccal to the central groove.
The surface of the posterior teeth that face the cheek is called the:
Buccal.
Which muscle is NOT a muscle of mastication?
Buccinator
Fissures are fault lines in the surface of a tooth:
Caused by imperfect joining of the enamel of lobes.
Which of the following alloys is commonly used in the dental laboratory for casting dental non-precious ceramic understructures?
Chrome-Cobalt
What is one of the advantages of a Sole Proprietorship?
Confidentiality
The structure of business that protects the individual from liability, but is subject to double taxation is the:
Corporation
What type of business organization is recognized by law, as having an existence separate and apart from the owners?
Corporation
The CEJ is the junction of the:
Crown and root.
Which anterior has a cusp tip?
Cuspid
The major elevations on the chewing surfaces of all posterior teeth are called:
Cusps
The oblique ridge joins what two cusps?
DB & ML
Pumice used on new appliances should be changed at least:
Daily.
Which of the following dental professionals is legally authorized to permanently alter or reshape a patients tooth?
Dentist
Who is the primary person responsible for the procedures performed on the patient?
Dentist
The action of the suprahyoid group of muscles is to:
Depress the mandible.
What is the term that best describes grooves that separate teeth into lobes:
Developmental.
Dental appliances sent from the laboratory to the dental office should be shipped in:
Diluted Mouth wash.
What is iodophor used for?
Disinfecting
The lingual developmental groove:
Divides lingual of molars into two cusps.
The hardest tissue in the mouth is:
Enamel
What is the term describing the loss of primary teeth to create space for the eruption of the permanent teeth?
Exfoliation
In the fully developed adult dentition, there are______ premolars in mandibular arch.
Four
Which bone is a cranial l bone?
Frontal
Pumice should be mixed with a disinfecting solution and _____
Green soap.
The left maxillary cuspid of the primary teeth is designated what letter?
H
The two diseases specifically addressed by the OSHA Blood borne Pathogen Standard are:
HIV and HBV.
All new employees should be taught how to use the disinfection procedures:
Immediately
Transverse ridge refers to a ridge that:
Is an elevation in the central groove where one cusp meets another.
A cingulum is found on the______ side of anterior teeth.
Lingual
The centers of formation (of which there are 4 or more in each tooth) are called:
Lobes
From the occlusal view, which tooth or teeth are generally expected to have a trapezoid shaped outline?
Lower first molars.
The tooth that most commonly would be seen to have two buccal developmental grooves is the:
Mandibular 1st molar.
The tooth with four cusps of about equal size is the:
Mandibular 2nd molar.
The tooth with one or two lingual cusps is the:
Mandibular 2nd premolar.
The first permanent teeth to erupt are:
Max. or mand. 1st molars.
Which premolar commonly has a bifurcated root?
Maxillary 1
The cusp of Carabelli is located on the:
Maxillary 1st molar.
The tooth with the greatest mesial-distal width is the:
Maxillary central.
The oblique ridges are found on the:
Maxillary molars.
The Universal numbering system starts with tooth #1 as the:
Maxillary right 3rd molar.
A marginal ridge is found on the:
Mesial and distal occlusal surfaces of posteriors only.
The mesial and distal contacts on the maxillary first premolar are located:
More occlusal mesially than distally.
The mesial contact on a maxillary central is:
Near the junction of the incisal and middle thirds.
The biting surface of the posterior teeth is referred to as the:
Occlusal
Where is a triangular ridge found?
On each posterior cusp.
The Palatine Fovea are:
On either side of the midline on or near the vibrating line.
Mamelons are small bumps found:
On the incisal edge of un-worn teeth.
_______ teeth take the place of their deciduous predecessors.
Permanent
It is everyone's responsibility to ______ each other against infectious diseases.
Protect
Surfaces of teeth facing adjoining teeth in the same arch are called:
Proximal
Which tooth tissues is the softest?
Pulp
Using a torch to cast molten metal:
Requires Oxy-Acetylene gas.
Which accounting category is best described by the phrase "inflow of cash, receivables or some other asset, resulting from sales"?
Revenue.
The maxillary 1st molar from an occlusal view has a ______ shape.
Rhomboidal
The mesiofacial cusp arm on the maxillary canine compared to the distal facial cusp slope is:.
Shorter
Which of the following abrasives is recommended for the general shaping of fired porcelains?
Sintered Diamond.
On most posterior teeth, the distal marginal ridge is situated:
Slightly more cervically than mesial marginal ridge.
What type of business organization is the easiest to set up?
Sole Proprietorship
The individuals credited with the first successful commercial dental laboratory are:
Stowe & Eddy.
In most states, which of the following dental professionals can work without being DIRECTLY supervised by the dentist?
Technician
Which of the following dental professionals often own their own businesses but cannot perform work without a prescription?
Technicians
A triangular ridge descends from the cusp tip to:
The central part of occlusal surface.
The clinical crown is:
The part of the crown visible above the gingival tissues.
Proximal surfaces are:
The sides of all teeth.
A developmental groove is formed by:
The union of two lobes during tooth development.
A long axis line of a tooth runs which way through a tooth?
Through the center from top to root tip
How many mandibular teeth would normally contact a maxillary central incisor in centric occlusion?
Two
How many surfaces join to form a "line angle"?
Two
If any repair work is done in a dental laboratory, there should be at least _____ separate pumice mix(es) and polishing attachment(s) available for polishing.
Two
The lingual cusps on the Mandibular second premolar are:
Under developed
From the occlusal view, which tooth or teeth are generally expected to be "rhomboidal" in shape?
Upper molars.
How long can Hepatitis virus stay alive on a cast or appliance?
Weeks
What kind of cleaner should be used to ensure sterilization of hands?
What kind of cleaner should be used to ensure sterilization of hands?
Safety glasses should be worn:
While operating any equipment or casting metal.
