RestoCompre Flashcards
OPERATIVE DENTISTRY 1 PRELIM EXAM
- In a carious lesion in which caries has extended into dentin, which of the following zones contains infected dentin and is not capable of remineralization?
A. Normal dentin
B. Subtransparent dentin
C. Transparent dentin
D. Turbid dentin
E. Eburnated dentin
D. Turbid dentin
- A 20-year-old female presents for her initial dental examination and prophylaxis. During the examination, you observe wear on the occlusal surfaces of many posterior and anterior teeth. The wear on the posterior teeth are cup like and smooth, and on the anterior, it has smoothed out the lingual anatomy of the incisors. This is most typical of which type of wear?
A. Attrition
B. Erosion
C. Abrasion
D.Abfraction
D. Bruxism
B. Erosion
- There are four zones of carious enamel, the zones of incipient lesions. Which of the four zones is the largest?
A. Translucent zone
B. Dark zone
C. Body zone
D. Surface zone
E. All zone
C. Body zone
- All of the following are associated with Rampant caries except:
A. Acute onset
B. Rapid progression
C. Children
D. Deep and wide
E. Associated with pain
D. Deep and wide
- Discovered the role of microorganism in disease, a finding that would have a significant effect on the developing dental and medical profession
A.G.V BLACK
B. LOIUS PASTEUR
C. CHARLES WOODBURY
D. WALDON FERREIR
B. LOIUS PASTEUR
- Dramatically dental caries increased towards the end of 17 century and continued to increased until the early_
A. 1826
B. 1970
C. 1999
D.20th century
B. 1970
- In a three number formula stamped on the side of the handle of an instrument, the third number represents the
A. Width of the blade
B. Length of the blade in mm
C. Angle of the blade from the long axis of the shaft
D. Angle of the cutting edge from the shaft long axis
C. Angle of the blade from the long axis of the shaft
- Three factors required for the initiation of dental caries are ;
A. Polysaccharides, microorganism, enamel
B. Enamel lamella, lactobacilli, polysaccharides
C. Susceptible tooth, suitable substrate, bacterial enzymes system
D. Bacterial plaque, suitable tooth, polysaccharides
C. Susceptible tooth, suitable substrate, bacterial enzymes system
- The type of caries that appears very dark brown to black, hard to touch, smooth and has stopped progressing;
A. Rampant caries
B. Arrested caries
C. Chronic caries
D. Compound caries
B. Arrested caries
- The transparent layer is a zone of carious dentin that is softer than normal dentin and shows further loss of mineral from the intertubular dentin. Stimulation of this region will not produces pain, no bacteria are present.
A. 1st statement is correct, 2nd statement is incorrect
B. 1st statement is incorrect, 2nd statement is correct
C. both statement are correct
D.both statement are incorrect
A. 1st statement is correct, 2nd statement is incorrect
- The surface zone is relatively unaffected by the caries attack. It has a lower pore volume than the body of the lesion and a radiopacity comparable to affected adjacent enamel.
A. both the statement and the reason are correct and related
B. both the statement and the reason are correct but not related
C. the statement is correct, but the reason is not
D. the statement is not correct, but the reason is correct
E. neither the statement nor the reason is correct
C. the statement is correct, but the reason is not
- G.V. Black concluded that the following areas on tooth surface are relatively not self-cleansable:
A. Pits and fissures
B. Tips and cusps
C. crest of marginal ridges
D. all inclined planes of cusps and ridges E. None of the above
A. Pits and fissures
- Chisel are used primarily to cut enamel. Hatchets are primarily used to cut dentin.
A. Both statement are true.
B. Both statement are false.
C. 1st statement is true, 2nd statement is false
D. 1st statement is false, 2nd statement is true
C. 1st statement is true, 2nd statement is false
- Caries initiation requires the following EXCEPT:
A.Host
B. bacteria
C. carbohydrates
D. saliva
E. time
D. saliva
- Which will produce the smoothest amalgam surface and therefore would be the last polishing instrument among the following?
A. Finishing burs
B. Green carrot stone
C. White carrot stone
D. Greenie point
E. Brownie point
D. Greenie point
- Chronic caries is characterized by which of the following?
A. Pain is common
B. Slowly progressing or arrested
C. Entrance to the lesion is small
D. Lession is deep and narrow
B. Slowly progressing or arrested
- Instruments used for handling resins are made of:
A. Carbon steel
B. Teflon-coated metal
C. Platinum
D. Gold
B. Teflon-coated metal
18.Dental Caries depends on the balance between demineralization of organic and inorganic substance. Demineralization occurs when the pH level of the mouth drops below 4.
A.Both statements are correct
B.Both statements are incorrect
C.1st statement is correct,2. statement is incorrect
D.1st statement is incorrect, 2nd statement is correct
D.1st statement is incorrect, 2nd statement is correct
- When is dental caries said to be “extensive”?
A. It involves more than one tooth.
B. The distance between the infected dentin and pulp is less than 2 mm.
C. There is pulp exposure.
D. The distance between the infected dentin and pulp is less than 1 mm.
D. The distance between the infected dentin and pulp is less than 1 mm.
- The rate of which carious destruction of dentin progresses tends to be slower in older adults than in young person because of the
A. Change in pH of saliva with aging
B. Generalized dentinal scheming with aging.
C. Increase the intertubular organic content
D. Decrease in sugar consumption of older adult
B. Generalized dentinal scheming with aging.
- The following are the main factors that lead to the development of caries according to the modified Keyes-Jordan diagram except.
A. Time
B. cariogenic biofilm
C. poor oral hygiene
D. fermentable CHO’s
C. poor oral hygiene
- Positioning of the fingers in this manner creates a triangle of forces or tripod effect, which enhances the instrument control.
A. Palm and thumb grasp.
B.Pen grasp.
C. modified pen grasp
D. modified palm grasp
C. modified pen grasp
- For a dental hand instrument with a formula of 10- 8.5- 8, the number 10 refers to
A. The width of the blade, in tenths of a millimeter
B. The primary cutting-edge angle, in centigrades
C. The blade length, in millimeters
D. The blade angle, in centigrade
A. The width of the blade, in tenths of a millimeter
- Periodic examinations, bite-wing radiographs, and prophylactic procedures were the most common dental procedures in;
A. 1999
B. 1887
C. 1926
D. 1840
A. 1999
- Cutting instruments have formula describing the dimensions and angles of the working end. The first number indicates the blade in tenths of a millimeter
A.False
B. true
A.False
- What is the most effective community-based intervention to control dental decay?
A. School-based dental sealant programs
B. Community health centers with dental clinics
C. Fluoridation of drinking water
D. Introduction of sugarless chewing gums
C. Fluoridation of drinking water
- A tapered fissure bur can be described as a slightly tapered cone, the small end of the cone directed towards the bur shank.
A. 1st statement is correct, 2nd statement is incorrect
B. 1st statement is incorrect, 2nd statement is correct
C. Both statement are correct
D. Both statement are incorrect
C. Both statement are correct
- Which of the following terms refers to lose enamel due to some sort of outside mechanical action?
A. Abfraction
B. Abrasion
C. Attrition
D. Erosion
B. Abrasion
- Saliva has a direct antibacterial immunoglobulin. The salivary immunoglobulin found in saliva is
A. IgG
B. Ig A
C. IgM
D. IgE
B. Ig A
- Salivary glands produce antimicrobial products, buffer reduce the potential for acid formation not causes to ph to rise.
A. Both statements are correct.
B. Both statements are incorrect
C. 1st statement is correct, 2nd statement is incorrect
D. 1st statement is incorrect 2nd statement is correct
C. 1st statement is correct, 2nd statement is incorrect
Bonus
31. Which of the following statements regarding caries risk assessment is true?
A. The presence of restorations is a good indicator of past caries activity.
B. The presence of restorations is a good indicator of past caries activity.
C. The presence of plaque biofilm is a good indicator of current caries activity.
D. The presence of pit-and-fissure sealants is a good indicator of current caries
- The modified pen grasp is the most common instrument grasp in dentistry; this is because it allows for the greatest intricacy and delicacy of touch.
A. both the statement and the reason are Correct and related
B. Both the statement and the reason are correct but not related
C. The statement is correct, but the reason is NOT correct
D. The statement is NOT correct, but the reason is Correct E. neither the statement nor the reason is correct
A. both the statement and the reason are Correct and related
- Hand cutting instruments are manufactured from two main materials: carbon steel and stainless steel. In addition, some instruments are made with diamond inserts to provide more durable cutting edges.
A. Both statement are correct and related
B. Both statement are incorrect and not related
C. Ist statement is correct, 2nd statement is incorrect
D. Ist statement is correct, 2nd statement is correct
C. Ist statement is correct, 2nd statement is incorrect
- Which of the following terms refers to tooth structure loss in the cervical area secondary to biomechanical loading?
A. Abfraction
B. Abrasion
C. Attrition
D. Erosion
A. Abfraction
- Caries activity could well increase;
A. During pregnancy
B. All of these
C. following serious emotional problem
D. Depression stage
B. All of these
- In the Zone of dentinal sclerosis Intertubular dentin is demineralized, damage to the odontoblastic zone process is not apparent.
A. 1st statement is true, 2nd statement is false
B. 1st statement is false, 2nd statement is true
C. both statement are true
D. both statement are falsely
A. 1st statement is true, 2nd statement is false
- In cavity preparation we need different kinds of burs, it is a hand instrument having nib for fattening the pulpal floor
A. 1st statement is correct ,2nd statement is incorrect
B. 1st statement is incorrect, 2nd statement is correct
C. both statement are correct
D. both statement are incorrect
A. 1st statement is correct ,2nd statement is incorrect
- It is the destruction of pathogenic micro-organism existing in their vegetative state on living tissue.
A. sterilization
B. antisepsis
C. disinfection
D. antiseptic
B. antisepsis
- Carious lession that develop at the margins of restorations;
A. Primary caries
B. chronic caries
C. acute caries
D. secondary caries
D. secondary caries
40.Incipient caries on proximal surfaces is usually found;
A.Lingual to the contact area
B. At the contact area
C, facial to the contact area
D. occlusal to the contact area
B. At the contact area
- Caries is primarily cause by;
A. Carbohydrates.
B.Protein accumulation.
C. plaque
D. saliva
C. plaque
42.On a carbide bur, greater number of cutting blades results in;
A. Less efficient cutting and a smoother surface
B. More efficient cutting and smoother surface.
C. Less efficient and rougher surface
D. More efficient and rougher surface
A. Less efficient cutting and a smoother surface
- Caries proceeds from DEJ to enamel; for smooth surface the base is on the DEJ and the apex is on enamel.
A. backward caries. B. forward caries
C. incipient caries. D. chronic caries
A. backward caries.
- Instrumentation will produce heat, heat produces 130 degrees fahrenheit results to permanent pulpal damage.
A. 1st statement is correct, 2nd statement is incorrect
B. 2nd statement is correct, 1st statement is incorrect
C. both statement are correct
D.both statement are incorrect
C. both statement are correct
45.Burs are cutting instruments, what is the side that faces the tooth structures.
A. Rake
B. steel
C. head
D. body
A. Rake
- Hoe is used to define line and points angle of class Ill and class v, angle former is used to establish retention form.
A. 1st statement is right, 2nd statement is wrong
B. 1st statement is wrong, 2nd statement is right
C. Both statement are right
D. Both statement are wrong
A. 1st statement is right, 2nd statement is wrong
47.Operative dentistry is foundation of the dentistry from Which all branches have evolved, which will require full coverage restorations for correction.
A. 1st statement is correct, 2nd statement is incorrect
B. 1st statement is incorrect,2nd statement is correct
C. both statement are correct
D. both statement are incorrect
D. both statement are incorrect
- Which of the following describes the microscopic form of incipient pit and fissure caries in enamel?
A. A cone-shaped lesion with the apex toward the DEJ
B. A cone-shaped lesion with the apex toward the outer surface
C. A circular-shaped lesion, open at the surface
D. A circular-shaped lesion, appearing along fissures
B. A cone-shaped lesion with the apex toward the outer surface