Term
| Fundamentally, refractive index of heat cured PMMA is NOT the same as chemically cured PMMA because.... |
|
Definition
| They strongly scatter light |
|
|
Term
| The principal reason we cannot see through most biological tissues is because: |
|
Definition
| Scattering and absorption |
|
|
Term
| Lesions appear white because of increased _______ and pigmented due to |
|
Definition
| scattering; increased absorption |
|
|
Term
| Limitations of PMMA as direct filling material indicates: |
|
Definition
| Shrinkage, low bond strength, leakage, yellow w/ age, high wear, low strength |
|
|
Term
| Which thermal property is a major advantage of metal restorative materials over dental composite? |
|
Definition
| Coefficient of Thermal Expansion |
|
|
Term
| Fundamentally, the refractive index. of a heat cured PMMA is the same as that of a chemically cured PMMA |
|
Definition
|
|
Term
|
Definition
|
|
Term
| Studies have shown that a decrease in S. mutans levels can be reduced by: |
|
Definition
| Using Chlorhexidine & Fluoride rinse |
|
|
Term
| Mrs. J had interproximal decay and had a saliva flow rate test of less than 0.5mL/min. She should be placed in a ______ caries risk category |
|
Definition
|
|
Term
| How should you orient your handpiece for a Class I on a posterior tooth? |
|
Definition
| Perpendicular to the occlusal plane/parallel to the long axis of the tooth |
|
|
Term
| The dental dam frame opens towards what |
|
Definition
|
|
Term
| Dr. Morehead placed sealant but noticed a small defect on occlusal surface after he checked the occlusion. He should: |
|
Definition
| isolate, etch, and apply fresh sealant |
|
|
Term
2. Compared to pure apatite mineral, enamel is
a. harder
b. more brittle
c. tougher
d. stiffer
e. all of the above |
|
Definition
|
|
Term
3. Mineralization tissues have the following common characteristic(s):
a. large spherical mineral crystals
b. composed of 100% mineral
c. mineral forms without interaction with protein
d. structure is organized and often hierarchical
e. all of the above |
|
Definition
| d. structure is organized and often hierarchical * |
|
|
Term
4. Creep is _____?
a. increase in strain with constant applied load below yield point
b. decrease in strain with constant applied load below yield point
c. decrease is stress with constant applied load below yield point
d. increase in strain with constant applied load above yield point
e. increase in stress with constant applied load above yield point |
|
Definition
| a. increase in strain with constant applied load below yield point |
|
|
Term
5. Fracture mechanics are most important for _____?
a. dental amalgam
b. dental composites
c. gold alloys
d. base metal alloys
e. dental ceramics |
|
Definition
|
|
Term
6. Which material is best matched to the thermal expansion of dental hard tissues.
a. unfilled sealant
b. composite
c. gold alloys
d. inlay wax
e. water |
|
Definition
|
|
Term
7. Which dental restorative biomaterial would most rapidly transfer heat to the pulp.
a. dental amalgam
b. dental composite
c. gold
d. porcelain
e. cement |
|
Definition
|
|
Term
. The superelastic behavior of NiTi is advantageous for ______.
a. taking impressions
b. reducing strength
c. orthodontic wires
d. reducing the endurance limit
e. increasing % elongation |
|
Definition
|
|
Term
9. Which property is typically a greater weakness of dental ceramics ?
a. chemical stability
b. fracture strength
c. elastic moduli
d. hardness |
|
Definition
|
|
Term
11. High _______ is an advantage of using metals as a dental restorative material.
a. ductility
b. electrical conductivity
c. thermal conductivity
d. luster |
|
Definition
|
|
Term
12. Dental composites typically have ______added to reduce thermal expansion.
a. ceramics
b. polymer resins
c. dental cements
d. metals |
|
Definition
|
|
Term
15. To which group of teeth does the term “buccoocclusal line” refer to?
a. The mandibular teeth
b. The maxillary teeth |
|
Definition
| a. The mandibular teeth * |
|
|
Term
23. Every cusp has a triangular ridge associated with it.
a. True
b. False |
|
Definition
|
|
Term
24. Before we provide any services to our patients we must have a diagnosis. Which one of the choices is used as essential information we need to gather in order to establish a diagnosis?
a. Have appropriate radiographs
b. Patient’s brushing habits
c. Study models of your patient
d. All dental insurance information |
|
Definition
| a. Have appropriate radiographs * |
|
|
Term
15. To which group of teeth does the term “buccoocclusal line” refer to?
a. The mandibular teeth
b. The maxillary teeth |
|
Definition
| a. The mandibular teeth * |
|
|
Term
16. Which of the following cusps is a working cusp?
a. The buccal cusp of the maxillary first premolar
b. The lingual cusp of the mandibular second premolar
c. The buccal cusp of the mandibular first premolar
d. The cusp of carabelli |
|
Definition
| c. The buccal cusp of the mandibular first premolar * |
|
|
Term
17. When the mandible moves to the right, which condyle is the orbiting condyle?
a. The right condyle
b. The left condyle |
|
Definition
|
|
Term
21. Overjet is the same as horizontal overlap.
a. True
b. False |
|
Definition
|
|
Term
22. How many root canals can a maxillary first premolar have?
a. One root canal
b. Two root canals
c. Three root canals
d. All of the above
e. None of the above |
|
Definition
|
|
Term
23. Every cusp has a triangular ridge associated with it.
a. True
b. False |
|
Definition
|
|
Term
24. Before we provide any services to our patients we must have a diagnosis. Which one of the choices is used as essential information we need to gather in order to establish a diagnosis?
a. Have appropriate radiographs
b. Patient’s brushing habits
c. Study models of your patient
d. All dental insurance information |
|
Definition
| a. Have appropriate radiographs * |
|
|
Term
Mrs. Jones came in with multiple areas of caries. She saw you only a year ago and had perfect teeth and a history of little decay over the 20 years she’s been seeing you. She continues to have a healthy diet but recently has been treated for depression. What do you suspect?
a. She’s not telling the truth about her diet
b. She needs to change her toothbrush
c. She has Xerostomia (dryness of the mouth) caused by use of anti-depressants
d. Her sealants must have fallen out |
|
Definition
| c. She has Xerostomia (dryness of the mouth) caused by use of anti-depressants * |
|
|
Term
If your chair height position is too low, what problem could happen?
a. You would be bent over the patient
b. Your arms would get tired and sore from being elevated
c. Your neck would be overflexed |
|
Definition
| b. Your arms would get tired and sore from being elevated * |
|
|
Term
Some of the risks we face in dentistry are.
a. Loss of hearing
b. Degenerative spinal disc disorders
c. Muscle Ishemia
d. All of the above |
|
Definition
|
|
Term
Angelina is a 5th year dental student. She complains that her hand cramps and gets numb every time she works on a patient. What could be the ergonomic issue here?
a. She is bent over too much
b. She is using an incorrect finger rest
c. Her gloves are too small
d. Her feet are not resting on the floor |
|
Definition
| c. Her gloves are too small * |
|
|
Term
Before placing a rubber dam clamp on the tooth, it is important to:
a. Tie floss to the clamp
b. Apply lubricant on the teeth
c. Floss all contacts to make sure the contacts are not too tight |
|
Definition
| a. Tie floss to the clamp |
|
|
Term
Winged clamps are especially useful for:
a. Endodontic (root canal) procedures
b. Placing the rubber dam in the mouth in one piece
c. Isolating a single tooth
d. All of the above |
|
Definition
|
|
Term
In a properly placed rubber dam, you are looking for the following criteria EXCEPT:
a. Leak free dam
b. Interdental dam inverted in
c. Clamp on tight without tissue trauma
d. Open access to the teeth being treated
e. All statements above are desirable |
|
Definition
| e. All statements above are desirable |
|
|
Term
All of the following questions about dental caries are true except one. Which one?
a. caries can be transmitted from parents to their children
b. if sucrose was eliminated from their diet, children would not have dental caries
c. caries is a bacterial infection
d. if salivary flow is deficient, dental caries can occur more readily
e. mutans-type Streptococci and Lactobacilli are implicated in dental caries |
|
Definition
| b. if sucrose was eliminated from their diet, children would not have dental caries * |
|
|
Term
The component in the hydroxyapatite crystal that makes it easier to demineralize
enamel or dentin is which one of the following?
a. fluoride
b. phosphate
c. calcium
d. carbonate |
|
Definition
|
|
Term
Protective factors against dental caries include all of the following except one. Which one?
a. daily removal of bacterial plaque
b. use of fluoride-containing toothpaste
c. between meal snacking on fruits and vegetables
d. use of sugar-free gum when brushing after a meal is not possible
e. use of dental sealants |
|
Definition
| c. between meal snacking on fruits and vegetables * |
|
|
Term
Which one of the following statements is false?
a. If saliva is absent, then application of fluoride alone can produce remineralization
b. remineralized enamel is more resistant to further demineralization than the original enamel
c. remineralization occurs when a veneer or coating of calcium phosphate,
and often fluoride, forms over the partially dissolved hydroxyapatite crystal
d. fluoride incorporated into the enamel drops the pH at which the enamel will demineralize as compared to the original enamel |
|
Definition
| a. If saliva is absent, then application of fluoride alone can produce remineralization * |
|
|
Term
The infected zone of carious dentin is characterized by all of the following except one.
Which one?
a. dentin destruction usually occurs rapidly with little color change
b. large numbers of bacteria are present
c. extensive demineralization occurs
d. the outer portion of the infected dentin is often soft and moist
e. this entire zone should be removed when restoring the tooth |
|
Definition
| a. dentin destruction usually occurs rapidly with little color change * |
|
|
Term
Which one of the following does not have antibacterial properties against the caries
bacteria?
a. xylitol
b. saliva
c. fructose
d. chlorhexidine
e. fluoride |
|
Definition
|
|
Term
Achieving success in managing a high caries risk is a result of which one of the
following?
a. increasing fluoride use
b. reducing sugar consumption
c. careful brushing and flossing
d. balancing the pathologic risk factors with protective factors |
|
Definition
| d. balancing the pathologic risk factors with protective factors * |
|
|
Term
1. Dental caries is a microbial infection. Which of the following groups of microorganisms are most closely associated with the etiology (cause) of dental caries?
a. Actinomyces & Mycobacterium b. Staphylococcus & Streptococcus c. Streptococcus & Actinomyces d. Lactobacillus & Staphylococcus e. Lactobacillus & Streptococcus |
|
Definition
| e. Lactobacillus & Streptococcus |
|
|
Term
2. All of the following are needed in order for the white spot lesion to form except one. Which one?
a. enamel
b. dentin
c. plaque
d. sugars or cooked starch e. causative microorganisms |
|
Definition
|
|
Term
. Which one of the following increases the susceptibility of enamel to demineralization? a. phosphate
b. calcium
c. fluoride
d. hydroxyapatite
e. carbonate inclusions |
|
Definition
|
|
Term
4. The critical pH at which hydroxyapatite begins to dissolve is a. 3.5
b. 4.0 c. 4.5 d. 5.0 e. 5.5 |
|
Definition
|
|
Term
5. How does demineralized enamel remineralized? 2 answers
a. A layer of mineral is deposited on the outer surface of the tooth
b. A mineral coating covers the surface of the affected enamel crystals
c. Fluoride soaks into the enamel and neutralizes acids
d. Mineral flowing from the dentinal tubules helps to re-form the hydroxyapatite crystals |
|
Definition
|
|
Term
6. Which one of the following statements is true?
a. A diet high in sugar will always cause dental caries
b. A patient with a high level of the microorganisms that cause caries will always develop caries.
c. A dry mouth always leads to dental caries
d. Pathologic risk factors for caries can be balanced by protective factors and no caries will occur |
|
Definition
| d. Pathologic risk factors for caries can be balanced by protective factors and no caries will occur |
|
|
Term
7. Which one of the following fluoride treatments delivers the highest dose of fluoride in a single treatment?
a. in-office fluoride foam or gel in trays
b. OTC (over-the –counter) mouthrinse
c. OTC toothpaste with fluoride (i.e. Crest) d. prescription fluoride toothpaste |
|
Definition
| a. in-office fluoride foam or gel in trays |
|
|
Term
8. Fluoride has an anti-caries effect in which of the following way(s)? a. It can kill bacteria
b. It makes the hydroxyapatite more resistant to acid c. It neutralizes acid
d. both a & b
e. all of the above |
|
Definition
|
|
Term
9. Compared to the original enamel, remineralized enamel is
(2 answers)
a. more resistant to future demineralization
b. less resistant to future demineralization
c. the same as the original enamel in regard to demineralization
d. more resistant to future demineralization only if fluoride has been incorporated into
the hydroxyapatite |
|
Definition
|
|
Term
| 11. The greatest benefit is derived from fluoride for caries prevention a. when it is incorporated into the developing tooth b. from repeated topical exposure c. neither a nor b |
|
Definition
| b. from repeated topical exposure |
|
|
Term
2. The bacteria that cause dental caries
a. can be transmitted from mother to child
b. can be transmitted father to mother
c. can be transmitted among siblings
d. all of the above
e. none of the above; they are not transmitted person to person. |
|
Definition
|
|
Term
13. What does the Stephan curve plot out? a. the rate of bacterial growth
b. the pH of saliva over time
c. the pH of plaque acid over time
d. the acid content of the food substrat |
|
Definition
|
|
Term
14. In an individual with a stimulated saliva flow rate of 2 ml/minute, in locations of the mouth that are readily accessible to saliva, how long on average does it take for bacterial acids to be buffered to neutral by saliva?
a. 5-10 minutes b. 20-30 minutes c. 60-70 minutes d. 70-80 minutes e. 90-120 minutes |
|
Definition
|
|
Term
15. When you are not able to brush and floss your teeth after a meal, which of the following is/are useful in helping to minimize bacterial acid attacks on your teeth?
a. swishing vigorously with water to remove food particles b. chewing sugar-free gum (particularly gum with xylitol) c. eating cheese or other neutral or basic high calcium food d. all of the above |
|
Definition
|
|
Term
16. Which one of the following statements about the white spot lesion is false? a. the surface appears to be intact but microscopically is porous
b. the surface collapses early in the development of the lesion
c. it is usually limited to enamel
d. it has the potential to remineralized e. it is considered a subsurface lesion |
|
Definition
| b. the surface collapses early in the development of the lesion |
|
|
Term
17. Common locations for dental caries in the USA include which of the following? a. pits and fissures of posterior teeth, especially in children
b. proximal surfaces of posterior teeth
c. cervical areas with exposed roots, especially in adults over 65 years of age d. a & c
e. all of the above |
|
Definition
|
|
Term
18. The mouth mirror is used a. for indirect vision
b. to reflect light onto the teeth c. retract the cheeks
d. retract the tongue
e. all of the above |
|
Definition
|
|
Term
19. Which one of the following statements about an ergonomic operator position is false? a. the thighs should be parallel to the floor
b. the back should be straight
c. the elbows should be at the operator’s side whenever possible
d. the patient’s head should be slightly higher than the level of the operator’s lap e. the feet should be flat on the floor |
|
Definition
| a. the thighs should be parallel to the floor |
|
|
Term
20. A finger rest (2 answers)
a. is usually established with the little finger
b. is used to stabilize the instrument you will use
c. is not needed for the hand that holds the mouth mirror
d. always needs to be established in the same arch in which you are working |
|
Definition
|
|
Term
21. Primary bonds are
a. weaker than secondary
b. based on dipole interactions
c. always non-directional
d. dependent on valence electron configuration |
|
Definition
| d. dependent on valence electron configuration |
|
|
Term
22. Metallic bonds are characterized by
a. highly directional bond between atoms b. sharing of valence electrons
c. ionic interactions between metal ions d. all of the above |
|
Definition
| b. sharing of valence electron |
|
|
Term
23. Ceramic materials
a. contain atomic bonds with ionic character
b. contain atomic bonds with covalent character c. are brittle
d. are electric insulators
e. all of the above |
|
Definition
|
|
Term
25. Covalent networks
a. are commonly formed by carbon
b. are based on sp3 hybrids
c. make materials brittle
d. b and c
e. all of the above |
|
Definition
|
|
Term
26. Characteristic properties of metals include (2 answers) a. good conductors of electricity
b. good insulators of heat
c. brittleness
d. reflect visible light strongly e. a & d |
|
Definition
|
|
Term
Properties of metals depend on
a. the number of impurities in the crystal lattice b. the history of mechanical treatments
c. the history of thermal treatments
d. all of the above |
|
Definition
|
|
Term
Impurities in the crystal lattices of materials a. alter their mechanical properties
b. are not observed in diamonds
c. produce dislocations in metals
d. usually produce point defects e. a & d |
|
Definition
|
|
Term
Mrs. Pain came in with multiple areas of deep caries. She complained that her upper right molar area was sore to eating. Your radiographs showed that #3 had a cavity very close to the pulp. Her home care was terrible and she came in only when she had problems. What would you suggest for her next appointments?
a. Immediate Bacterial culture, saliva flow tests, cleaning and fluoride treatment
b. Quickly treat all of her cavities, and then seek specialty care for #3. Follow-up with
Caries risk assessment
c. Caries risk Assessment, cleaning restorations, and saving the deepest cavity
problem for the end (this also makes sure she follows up with all her treatment).
d. Temporary restoration |
|
Definition
#3, Caries risk assessment, cleaning, fluoride treatment,
and then completion of all restorations. |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
35. Before we provide any services to our patients we must have a diagnosis. Which one of the choices is not necessary to establish a diagnosis?
a. Have appropriate radiographs
b. Documented chart of your visual examination
c. Study models of your patient
d. All dental insurance information
e. Medical History |
|
Definition
| d. All dental insurance information |
|
|
Term
|
Definition
|
|
Term
. It is important for a restorative material to have a high ______ and a low _________ to provide good insulation of the pulp.
a) thermal conductivity, heat capacity
b) density, thermal diffusivity
c) heat capacity, thermal conductivity
d) coefficient of thermal expansion, heat capacity e) thermal diffusivity, density |
|
Definition
| heat capacity, thermal conductivity |
|
|
Term
Which dental material manifests the highest coefficient of thermal expansion ? a) tooth enamel
b) dental composite c) porcelain
d) gold
e) amalgam |
|
Definition
|
|
Term
Creep is defined as plastic deformation with a constant applied stress below the ______.
a) ultimate strength b) fracture strength c) endurance limit d) plastic limit
e) yield point |
|
Definition
|
|
Term
For alginate impression materials the tear strength _______ with _______ strain-rate ? a) increases, decreasing
b) decreases, increasing c) increases, increasing d) decreases, decreasing |
|
Definition
|
|
Term
| Ductility or plastic deformation is related to |
|
Definition
| the curved region beyond the initial straight portion |
|
|
Term
Salivary flow is a major factor in Caries susceptibility What factors can affect saliva flow? A) Anti-depressant medications
B) Systemic disease such as Sjogren's Syndrome C) Getting older D) All of the above |
|
Definition
|
|
Term
| As a general rule,if you are working on the patient's teeth on their left side, you want to: |
|
Definition
| tilt the patient's head to the right side |
|
|
Term
| If you are restoring the mesial surface of tooth #9 you want to |
|
Definition
| Work in the 12 o clock position using indirect vision with a mirror |
|
|
Term
When using our finger rest we want to:
A) use our ring finger
B) use firm pressure
C) place it on the same arch we are working on
D) place the finger rest on a solid surface such as the teeth or gingivae E) All of the above |
|
Definition
|
|
Term
When placing our rubber dam clamp,we orient the ring towards the distal of the tooth we are clamping.
A) This statement is true B) This statement is false |
|
Definition
|
|
Term
What could cause a rubber dam to leak?
A) Holes punched too far apart
B) Rubber Dam not stretched enough on the frame C) Distal dam area not flossed down
D) Used a plastic frame instead of a metal on |
|
Definition
| C) Distal dam area not flossed down |
|
|
Term
34.After placing a rubber dam , your patient raises his hand and complains that saliva is accumulating in the back of their throat. You should:
A) Continue the procedure by removing the rubber dam
B) Lower the patient's head and ask them to swallow and 'hang in there'
C) Raise the patient's head and insert a suction device under the rubber dam D) Cut a hole in the rubber dam to allow the patient to breathe |
|
Definition
| Raise the patient's head and insert a suction device under the rubber dam |
|
|
Term
PMMA is brittle at room temperature primarily because of:
a. high molecular weight
b. glass transition temperature significantly higher than room temperature
c. crosslinking
d. high molecular weight
e. all of the above |
|
Definition
| glass transition temperature significantly higher than room temperature |
|
|
Term
When the mandibular first premolar is viewed from the proximal, what is the approximate angle between the occlusal table and the long axis of the tooth?
a. 45 b. 55 c. 90 d. 10 e.30 |
|
Definition
|
|
Term
How many teeth are normally found in the adult dentition? Twenty
Twenty-four
Thirty-two
Thirty-six |
|
Definition
|
|
Term
How many anterior teeth are normally found in the adult dentition? Ten
Twelve
Twenty
Twenty-four |
|
Definition
|
|
Term
Tooth number 12 is: An incisor.
A canine.
A premolar.
A molar. |
|
Definition
|
|
Term
Tooth number 14 is located in which sextant? One
Two
Three
Four |
|
Definition
|
|
Term
The anatomic crown is covered by: Dentin.
Cementum.
Pulp tissue.
Enamel. |
|
Definition
|
|
Term
The anatomic root is covered by: Enamel.
Dentin.
Cementum.
Pulp tissue. |
|
Definition
|
|
Term
When a patient has 33 teeth, the additional tooth is called: A supernumerary tooth.
An extra tooth.
A false tooth.
An accessory tooth. |
|
Definition
|
|
Term
Tooth numbers 22 through 27 are identified as sextant: One.
Three.
Five.
Six. |
|
Definition
|
|
Term
Tooth number 18 is a: First molar.
Second molar.
Third molar. Premolar |
|
Definition
|
|
Term
The tooth numbering system that numbers teeth from 1 to 32 is known as: Universal Notation.
Palmer Notation.
International Notation.
None of the above |
|
Definition
|
|
Term
| The mandibular left second molar is tooth number: 18. 19. 30. 31. |
|
Definition
|
|
Term
Connective tissue, blood vessels, and nerves are found in the: Enamel.
Dentin.
21
Pulp. Cementum. |
|
Definition
|
|
Term
The cementoenamel junction (CEJ) separates the: Anatomic crown and the anatomic root. Cementum and dentin.
Enamel and dentin.
Clinical crown and clinical root. |
|
Definition
| Anatomic crown and the anatomic root. |
|
|
