Resto-Public Health-Com Dent Flashcards
A cavosurface bevel is used when preparing a tooth for a cast gold inlay or onlay. What is the principal reason for its use
A. To allow room for the cement
B. To improve marginal adaptation
C. To compensate for shrinkage of cast gold alloy
D. To provide resistance form for the preparation
B. To improve marginal adaptation
A composite restoration is wider than the diameter of the light tip of the curing unit. In this situation, the restoration is cured
by:
A. Moving the tip over the surface for the required time
B. Placing the tip stepwise over each area and exposing each area for the required time.
C. Positioning the tip far enough from the surface to illuminate the entire surface
D. Centering the tip on the surface and curing the entire restoration from this position
B. Placing the tip stepwise over each area and exposing each area for the required time.
A decrease in which of the following properties saliva is likely to cause a decrease in caries activity?
A. pH
B. Flow
C. Viscosity
D. Mineral content
C. Viscosity
A needs assessment should commence during which phase of program development
A. Evaluation
B. Assessment
C. Dental hygiene diagnosis
D. Planning
B. Assessment
A patient has a toothache. Radiographs show a deep carious lesion. There is no detectable pulpal exposure upon excavation
of decay. The best treatment at this time is
A. Direct pulp cap
B. Root canal therapy
C. Permanent restoration after placing a suitable base
D. Placement of zinc phosphate cement temporary restoration
C. Permanent restoration after placing a suitable base
A properly acid etched enamel surface appears
A. Somewhat yellow in color
B. Identical to unetched enamel
C. Dull white and chalky
D. Slightly gray with a shine
C. Dull white and chalky
All of the following are associated with Rampant caries except
A. Acute onset
B. Deep and wide
C. Rapid progression
D. Children
B. Deep and wide
All of the following are characteristics of a Class V (five) composite preparation except one. Which one is the EXCEPTION?
A. Retention provided by undercuts made into the axial walls
B. Cavosurface margins when placed on enamel should be beveled
C. Outline form of the prep is determined by the extent of the carious lesion
D. A butt joint is not indicated when finishing the preparation on root surfaces
D. A butt joint is not indicated when finishing the preparation on root surfaces
All of the following are components of sodium fluoride paste that can be used to treat root sensitivity except
A. Sodium fluoride
B. Eugenol
C. Kaolin
D. Glycerine
B. Eugenol
All of the following are radiographic signs of trauma from an occlusion except
A. Hypercementosis
B. Root resorption
C. Alteration of the lamina dura
D. Periodontal pockets
D. Periodontal pockets
All of the following are true for Class II amalgam preparations, except one. Which one is the EXCEPTION?
A. Proximal retention locks if placed, should be entirely in dentin, and are deeper gingivally than occlusally
B. The axiopulpal line angle is beveled or rounded to reduce stress
C. The uninvolved proximal wall should converge slightly toward the occlusal
D. The pulpal depth aids in the resistance form of the preparation
C. The uninvolved proximal wall should converge slightly toward the occlusal
All of the following are zones in four handed dentistry except
A. Operator zone
B. Assistant zone
C. Transfer zone
D. Grasping zone
D. Grasping zone
All of the following cavity classifications can involve any teeth except for:
A. Class I
B. Class II
C. Class V
D. Class VI
B. Class II
Also known as inter-diffusion zone by Nakabayashi and bonds composite to acid-etched dentin
A. Hybrid layer
B. Smear layer
C. Organic layer
D. Inorganic layer
A. Hybrid layer
An infection caused by a normally non-pathogenic microorganism in a host where resistance has been decreased or
compromised is known as
A. Nosocomial infection
B. Secondary infection
C. Opportunistic infection
D. Medical infection
C. Opportunistic infection
By burnishing from the tooth to the restoration until the amalgam is trimmed to the margin. What shape is the axial wall of a
class V cavity preparation as seen in the transverse section?
A. Straight
B. Kidney shaped
C. Convex
D. Concave
C. Convex
Change in dentinal structure as a response to slowly progressive or mild irritations such as mechanical abrasion or chemical
erosion is known as:
A. Physiologic dentinal sclerosis
B. Reactive sclerosis
C. Reparative dentin
D. Smear layer
D. Smear layer
Chronic caries is characterized by all of the following except
A. Pain is common
B. Common in adults
C. Extrinsic pigmentation
D. Slowly progressing or arrested
A. Pain is common
Conservative tooth preparation is a fundamental principle of sound restorative dentistry. Which of the following strategies
regarding tooth preparation will result in an unsatisfactory result?
A. Preparing the occlusal surface anatomically to create uniform thickness in the restoration
B. Axial wall preparation should be minimal at approximately 6-degree taper
C. Crown preparations should utilize partial ceramic coverage rather than full ceramic coverage in non-esthetic areas
D. Use of a shoulder margin on all full metal crown restorations
D. Use of a shoulder margin on all full metal crown restorations
Consuming which of the following is an evidence-based intervention to provide tooth decay
A. Sugarless gum
B. Diet soda
C. Raisins
D. Bottled water
A. Sugarless gum
Dentinal slots are prepared using a ______ bur
A. 169
B. 1/2
C. 33 1/2
D. 2
C. 33 1/2
Dietary fluoride supplementation has been shown to be an effective, if not efficient, method of decay prevention. What is the
relationship of caries reduction levels seen with this method as compared to water fluoridation and topical application?
A. Greater than water fluoridation and topical application
B. Less than water fluoridation and topical application
C. Greater than water fluoridation but less than topical application
D. Less than water fluoridation but greater than topical application
D. Less than water fluoridation but greater than topical application
Direct pulp capping is contraindicated when
A. Size of exposure is >0.5 mm
B. Bleeding at the site is controllable by pressure
C. Vital and healthy pulp
D. Exposure site is uncontaminated by saliva
A. Size of exposure is >0.5 mm
Direct pulp capping is contraindicated when
A. Size of exposure is >0.5 mm
B. Bleeding at the site is controllable by pressure
C. Vital and healthy pulp
D. Exposure site is uncontaminated by saliva
A. Size of exposure is >0.5 mm
DMF index is an example of
A. Reversible index
B. Irreversible index
C. Full mouth index
D. Simplified index
B. Irreversible index
Enamel is etched with
A. Maleic acid
B. Polyacrylic acid
C. Phosphoric acid
D. Tartaric acid
C. Phosphoric acid
Filipino children are advised to have their first dental check up
A. As soon as first tooth appears
B. After all primary teeth has erupted
C. After the first birthday
D. All of the above
A. As soon as first tooth appears
Fluorides affect the tooth structure in the following manner to make it more resistant to dental caries
I. Fluoride removes the organic component of the enamel matrix
II. Fluoride ions chemically react with the hydroxyapatite crystal and replace the hydroxyl ions
III. Fluoride ions react chemically with the calcium in the enamel
IV. When topically applied, the fluoride ions only affects the outer layers of enamel
V. Fluoride ions react with the apatite crystal to make it more resistant to acid
A. I, II, IV
B. II, IV, V
C. III, IV, V
D. I, III, IV
B. II, IV, V
For a 12 year old, the treatment of choice for a fractured mandibular lateral incisor involving the mesio-incisal line angle but
not the pulp is
A. Lingual dovetail inlay
B. Etching and placement of resin restoration
C. Pin retained metallic restoration
D. Porcelain fused to metal crown
B. Etching and placement of resin restoration
G.V. Black concluded that the following areas on tooth surfaces are relatively self-cleansable
EXCEPT
A. Pits and fissure
B. Tips and cusps
C. Crest of marginal ridges
D. All inclined planes of cusps and ridges
A. Pits and fissure
How should the margins of a dental amalgam restoration be trimmed?
A. By carving along the margins with a sharp instrument that rests on the tooth surface.
B. By carving from the restoration to the tooth with a sharp instrument.
C. By carving from the tooth to the restoration with a sharp instrument
A. By carving along the margins with a sharp instrument that rests on the tooth surface.
If a topical fluoride is to be used in conjunction with a pit and fissure sealant, which sequence is used?
A. Fluoride before sealant
B. Fluoride after sealant
C. Fluoride should not be used
D. It really does not make any difference
B. Fluoride after sealant
Instruments that might logically be used for placing gingival bevels on inlay preparations are the following except:
A. Fine, tapered diamond stones
B. Margin trimmers
C. Enamel hatchets
D. Tapered carbide burs
C. Enamel hatchets
Loading of a restoration beyond the material’s elastic limit produces
A. Stress relaxation
B. Plastic deformation only
C. Elastic deformation only
D. Both elastic and plastic deformation
D. Both elastic and plastic deformation
Marginal leakage of an amalgam restoration is
A. Related to the new phases formed
B. Severe throughout the life of the restoration
C. Less after initial placement than at 6 months
D. Decreased as the restoration ages
D. Decreased as the restoration ages
Most common fracture occurring in amalgam restoration is seen at
A. Isthmus area
B. Cavosurface margin
C. The contact area
D. Proximal box
A. Isthmus area
Nutritional counseling is
A. Unimportant in the dental care setting as it does not have any clear relationship with oral diseases
B. An inadequate mode of interaction between the patient and health care provider aimed in adopting healthy dietary
behaviors associated with improved health
C. Emphasizes the different types of carbohydrates but how the frequency, consistency, and position of their
consumption in meals can increase risk of dental caries
D. None of the above
C. Emphasizes the different types of carbohydrates but how the frequency, consistency, and position of their
consumption in meals can increase risk of dental caries
One toothbrushing method which is known to be potentially destructive of hard and soft tissue is
A. Side to side
B. Bass
C. Roll
D. Up and down
A. Side to side
Pins as secondary retention for amalgam should be oriented
A. Parallel to long axis of the tooth
B. Parallel to the external tooth surface
C. Perpendicular to the forces of mastication
D. Parallel to the adjacent tooth
B. Parallel to the external tooth surface
Professionally applied topical fluoride include the following EXCEPT
A. 8% stannous fluoride
B. Duraphat
C. 1.23% APF
D. All of the above
D. All of the above