In regard to the enamel surface: A. It is a perfect substance for bonding B. It does not conform to the bonding requirements C. It is the most inorganic, rough part D. It is free from contamination and roughness E. None of the above

In regard to the enamel surface:
A. It is a perfect substance for bonding
B. It does not conform to the bonding requirements
C. It is the most inorganic, rough part  
D. It is free from contamination and roughness
E. None of the above
by

1 Answer

Answer :

B. It does not conform to the bonding requirements
by

Related questions

Why do you itch enamel for composite restorations: A. To increase surface area B. To decrease surface area C. Does not really change the surface area D. Increase the chemical bonding capability E. Decrease the chemical bonding capability

Description : Why do you itch enamel for composite restorations: A. To increase surface area B. To decrease surface area C. Does not really change the surface area D. Increase the chemical bonding capability E. Decrease the chemical bonding capability

Last Answer : A. To increase surface area

Acid conditioning of enamel and eroded dentine: A. Provides an none traumatic, conservative clinical approach to the bonding of restorative material B. Is a traumatic approach to bonding materials C. Is not a safe and simple method of bonding D. Bonding fails to produce a highly significant retention and good marginal integrity and clinical durability E. None of the above

Description : Acid conditioning of enamel and eroded dentine: A. Provides an none traumatic, conservative clinical approach to the bonding of restorative material B. Is a traumatic approach to bonding ... highly significant retention and good marginal integrity and clinical durability E. None of the above

Last Answer : A. Provides an none traumatic, conservative clinical approach to the bonding of restorative material

“Pop off” of a porcelain veneer from the under the lying gold crown is due to:** A. Too thick application of pure gold surface conditioner B. Contamination at the porcelain metal interface C. Under firing the opaque layer D. All of the above

Description : “Pop off” of a porcelain veneer from the under the lying gold crown is due to:** A. Too thick application of pure gold surface conditioner B. Contamination at the porcelain metal interface C. Under firing the opaque layer D. All of the above

Last Answer : B. Contamination at the porcelain metal interface

A crown casting with a chamfer margin fits the die; but in the mouth the casting is open approximately 0.3mm. A satisfactory fit and accurate physiological close of the gingival area of the crown can BEST be achieved by: A. Hand burnishing B. Mechanical burnishing C. Using finishing burs and points to remove the enamel margins on the tooth D. Making a new impression and remaking the crown E. Relieving the inside of the occlusal surface of the casting to allow for further

Description : A crown casting with a chamfer margin fits the die; but in the mouth the casting is open approximately 0.3mm. A satisfactory fit and accurate physiological close of the gingival area of the crown ... the crown E. Relieving the inside of the occlusal surface of the casting to allow for further

Last Answer : D. Making a new impression and remaking the crown

The bur should be tilted lingually when preparing the occlusal surface of class II cavity on a mandibular first premolar in order to: I. Remove unsupported enamel II. Prevent encroachment on the buccal pulp horn III. Prevent encroachment on the lingual pulp horn IV. Maintain dentinal support of the lingual cusp A. I and II B. I and III C. II and IV D. III and IV E. IV only

Description : The bur should be tilted lingually when preparing the occlusal surface of class II cavity on a mandibular first premolar in order to: I. Remove unsupported enamel II. Prevent encroachment on the buccal pulp horn III. Prevent ... and II B. I and III C. II and IV D. III and IV E. IV only

Last Answer : C. II and IV

The main purpose of finishing the enamel walls is, A. Remove loose enamel rods B. Provide a better surface for the adoption of restorative material The main purpose of finishing the enamel walls is, A. Remove loose enamel rods B. Provide a better surface for the adoption of restorative material

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Last Answer : A. Remove loose enamel rods

Two conditions of enamel facilitate the post eruptive uptake of fluoride: A. Hyper mineralisation and surface dentine B. Surface demineralisation and hypo mineralisation C. Dental fluorosis and enamel opacities

Description : Two conditions of enamel facilitate the post eruptive uptake of fluoride: A. Hyper mineralisation and surface dentine B. Surface demineralisation and hypo mineralisation C. Dental fluorosis and enamel opacities

Last Answer : B. Surface demineralisation and hypo mineralisation

Hypoplasia as seen in x rays:** A. Thick enamel surface B. Thin enamel surface C. Sometimes large pulp chamber D. Can not be detected on X rays

Description : Hypoplasia as seen in x rays:** A. Thick enamel surface B. Thin enamel surface C. Sometimes large pulp chamber D. Can not be detected on X rays

Last Answer : D. Can not be detected on X rays

The surface of enamel rod prisms in permanent teeth is: A. Perpendicular to the outer surface of the tooth B. Parallel to the outer surface of the tooth C. Parallel to enamel contour D. Parallel to enamel-dentine contour

Description : The surface of enamel rod prisms in permanent teeth is: A. Perpendicular to the outer surface of the tooth B. Parallel to the outer surface of the tooth C. Parallel to enamel contour D. Parallel to enamel-dentine contour

Last Answer : A. Perpendicular to the outer surface of the tooth

The effectiveness of the acid etch is dependent on which of the following factors: A. Material must be used to clean the surface of the tooth prior to etching B. The effectiveness of the itchant C. The chemical and physical nature of the tooth D. The area and surface of the enamel to be itched

Description : The effectiveness of the acid etch is dependent on which of the following factors: A. Material must be used to clean the surface of the tooth prior to etching B. The effectiveness of the itchant C. The chemical and physical nature of the tooth D. The area and surface of the enamel to be itched

Last Answer : C. The chemical and physical nature of the tooth

When you try to seat a crown on a tooth you find a discrepancy of 0.3mm at the margin; you will: A. Reduce inner surface of crown B. Remake a new crown C. Smooth the enamel at the margin D. Hand burnish crown margins

Description : When you try to seat a crown on a tooth you find a discrepancy of 0.3mm at the margin; you will: A. Reduce inner surface of crown B. Remake a new crown C. Smooth the enamel at the margin D. Hand burnish crown margins

Last Answer : B. Remake a new crown

The difference between deciduous and permanent teeth is: A. Deciduous teeth have a higher pulp horns and larger pulp chambers B. Deciduous teeth have flatter contact areas C. Deciduous teeth have thinner enamel surface D. All of the above

Description : The difference between deciduous and permanent teeth is: A. Deciduous teeth have a higher pulp horns and larger pulp chambers B. Deciduous teeth have flatter contact areas C. Deciduous teeth have thinner enamel surface D. All of the above

Last Answer : D. All of the above

Using fluoride in the root surface caries is to protect, A. Enamel B. Dentine and cementum C. Cuticle

Description : Using fluoride in the root surface caries is to protect, A. Enamel B. Dentine and cementum C. Cuticle

Last Answer : B. Dentine and cementum

In 3rd generation dentin bonding agents, HEMA (Hydroxyethylmethacrylate) is 1. a hydrophilic monomer that wets the dentinal surface 2. a hydrophilic resin that forms a ”hybrid” layer by chemically reacting the intertubular dentin. 3. a hydrophilic monomer that alters collagen to promote cross linking of collagen to dentin. 4. a bifunctional molecule resin that copolymerizes to bis-GMA resins. a. 1,2 b. 1,4 c. 2,3 d. 1,3 e. 3,4

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Last Answer : b. 1,4

Where is the narrowest part of the pulp: A. At the radiographic apex B. At the dentino-enamel junction C. At the orifices

Description : Where is the narrowest part of the pulp: A. At the radiographic apex B. At the dentino-enamel junction C. At the orifices

Last Answer : A. At the radiographic apex

Marginal leakage at the proximal gingival cavosurface of a recently restored class II can be caused by: I. Insufficient condensation II. First proximal increment was too large III. Neglecting to wedge the matrix IV. Hand manipulation instead of mechanical V. Debris contamination A. I, II, III B. II, III, IV C. I, II, V D. None of the above E. All of the above

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Last Answer : C. I, II, V

The most common cause of porosity in porcelain jacket crowns is, A. Moisture contamination B. Excessive firing temperature C. Failure to anneal the platinum matrix D. Excessive condensation of the porcelain E. Inadequate condensation of the porcelain

Description : The most common cause of porosity in porcelain jacket crowns is, A. Moisture contamination B. Excessive firing temperature C. Failure to anneal the platinum matrix D. Excessive condensation of the porcelain E. Inadequate condensation of the porcelain

Last Answer : E. Inadequate condensation of the porcelain

Which one of the following statements is true? a. Independ. Quality planning enables the project manager to manage the trade-off between customer expectations and budgetdent reviews and quality audits form part of quality assurance to ensure the project manager delivers on time and to budget. b. Quality assurance provides confidence to stakeholders that requirements for quality will be exceeded. c. Quality control verifies that the project deliverables conform to specification, are fit for purpose and meet stakeholder expectations.

Description : Which one of the following statements is true? a. Independent reviews and quality audits form part of quality assurance to ensure the project manager delivers on time and to budget. ... Quality planning enables the project manager to manage the trade-off between customer expectations  and budget

Last Answer : c. Quality control verifies that the project deliverables conform to specification, are fit for purpose and  meet stakeholder expectations.

Which one of the following statements is true? a. Independent reviews and quality audits form part of quality assurance to ensure the project manager delivers on time and to budget. b. Quality assurance provides confidence to stakeholders that requirements for quality will be exceeded. c. Quality control verifies that the project deliverables conform to specification, are fit for purpose and meet stakeholder expectations. d. Quality planning enables the project manager to manage the trade-off between customer expectations and budget.

Description : Which one of the following statements is true?  a. Independent reviews and quality audits form part of quality assurance to ensure the project  manager delivers on time and to budget. ... planning enables the project manager to manage the trade-off between customer  expectations and budget.

Last Answer : c. Quality control verifies that the project deliverables conform to specification, are fit for  purpose and meet stakeholder expectations.

Why do you polish the teeth before seating of a partial denture: A. To smooth the rough surface B. To minimise the retention of plaque C. To increase the adoptability of occlusal rests

Description : Why do you polish the teeth before seating of a partial denture: A. To smooth the rough surface B. To minimise the retention of plaque C. To increase the adoptability of occlusal rests

Last Answer : B. To minimise the retention of plaque

Rough surface/Porosity of porcelain is a result of: A. Lack of compression/ condensation B. Sudden high temperature

Description : Rough surface/Porosity of porcelain is a result of: A. Lack of compression/ condensation B. Sudden high temperature

Last Answer : A. Lack of compression/ condensation

What is CORRECT in regard to the periodontal surface area in mandibular teeth: A. First molar> first premolar> second premolar (max) B. Canine> first premolar> second premolar. (max) C. Canine> lateral incisor> central incisor

Description : What is CORRECT in regard to the periodontal surface area in mandibular teeth: A. First molar> first premolar> second premolar (max) B. Canine> first premolar> second premolar. (max) C. Canine> lateral incisor> central incisor

Last Answer : C. Canine> lateral incisor> central incisor

In regard to carbide burs; the more number of cutting blades and low speed will result in: A. Less efficient cutting and a smoother surface B. Less efficient cutting and a rougher surface C. More efficient cutting and a smoother surface D. More efficient cutting and a rougher surface

Description : In regard to carbide burs; the more number of cutting blades and low speed will result in: A. Less efficient cutting and a smoother surface B. Less efficient cutting and a rougher surface C. More efficient cutting and a smoother surface D. More efficient cutting and a rougher surface

Last Answer : A. Less efficient cutting and a smoother surface

In turbulent flow, a rough pipe has the same friction factor as a smooth pipe (A) In the zone of complete turbulence (B) When the roughness projections are much smaller than the thickness of the laminar film (C) Everywhere in the transition zone (D) When the friction factor is independent of the Reynold's number

Description : In turbulent flow, a rough pipe has the same friction factor as a smooth pipe (A) In the zone of complete turbulence (B) When the roughness projections are much smaller than the thickness of ... ) Everywhere in the transition zone (D) When the friction factor is independent of the Reynold's number

Last Answer : (B) When the roughness projections are much smaller than the thickness of the laminar film

In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of (A) Relative roughness (B) Absolute roughness (C) Friction co-efficient for flows at equal Reynold number (D) All (A), (B) & (C)

Description : In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said ... co-efficient for flows at equal Reynold number (D) All (A), (B) & (C)

Last Answer : (C) Friction co-efficient for flows at equal Reynold number

In the complete turbulence zone (in rough pipes), the (A) Rough and smooth pipes have the same friction factor (B) Laminar film covers the roughness projections (C) Friction factor depends upon NRe only (D) Friction factor is independent of the relative roughness

Description : In the complete turbulence zone (in rough pipes), the (A) Rough and smooth pipes have the same friction factor (B) Laminar film covers the roughness projections (C) Friction factor depends upon NRe only (D) Friction factor is independent of the relative roughness

Last Answer : (D) Friction factor is independent of the relative roughness

for dental caries to progress in dentine, A. the dentine must contain soluble collagen B. enamel must contain glycoproteins C. diet must contain simple carbohydrate D. diet must contain polysaccharides E. pulp must contain complement

Description : for dental caries to progress in dentine, A. the dentine must contain soluble collagen B. enamel must contain glycoproteins C. diet must contain simple carbohydrate D. diet must contain polysaccharides E. pulp must contain complement

Last Answer : C. diet must contain simple carbohydrate

Which rotary instrument gives the smoothest enamel cut? a. carborundum stone (green stone) b. aluminum oxide stone (white stone) c. plain fissure bur d. cross-cut fissure bur e. medium diamond bur (great efficiency but roughest cut)

Description : Which rotary instrument gives the smoothest enamel cut? a. carborundum stone (green stone) b. aluminum oxide stone (white stone) c. plain fissure bur d. cross-cut fissure bur e. medium diamond bur (great efficiency but roughest cut)

Last Answer : c. plain fissure bur

During teeth eruption, the reduced enamel epithelium merges with the oral epithelium. What is the further development? A. Downgrowth of oral epithelium which replaces the reduced enamel epithelium B. Proliferation of inner enamel epithelium C. Proliferation of outer enamel epithelium D. Down growth of oral epithelium which undermines the reduced enamel epithelium E. Gradual transformation of the reduced enamel epithelium

Description : During teeth eruption, the reduced enamel epithelium merges with the oral epithelium. What is the further development? A. Downgrowth of oral epithelium which replaces the reduced enamel ... which undermines the reduced enamel epithelium E. Gradual transformation of the reduced enamel epithelium

Last Answer : E. Gradual transformation of the reduced enamel epithelium

Calculus attaches to teeth surfaces by: A. Acquired pellicle B. Interlocking to the crystals of the tooth C. Penetrated into enamel and dentine D. Mechanical interlocking E. All of the above

Description : Calculus attaches to teeth surfaces by: A. Acquired pellicle B. Interlocking to the crystals of the tooth C. Penetrated into enamel and dentine D. Mechanical interlocking E. All of the above

Last Answer : E. All of the above

Several applications have been suggested to increase the effectiveness of prophylactic application of topical fluoride which include all EXCEPT: A. Increase Fluoride ions in solution “increase concentration” B. Increase PH of fluoride C. Increase exposure time to topical fluoride D. Pre-treat enamel with 0.5% phosphoric acid E. Use NH4F instead of NaF

Description : Several applications have been suggested to increase the effectiveness of prophylactic application of topical fluoride which include all EXCEPT: A. Increase Fluoride ions in solution increase concentration B. Increase ... D. Pre-treat enamel with 0.5% phosphoric acid E. Use NH4F instead of NaF

Last Answer : B. Increase PH of fluoride

The minimal labial tooth reduction for satisfactory aesthetics with porcelain fused to metal crown is, A. 1mm B. The full thickness of enamel C. 1.5 mm D. 2.5mm E. One third of the dentine thickness

Description : The minimal labial tooth reduction for satisfactory aesthetics with porcelain fused to metal crown is, A. 1mm B. The full thickness of enamel C. 1.5 mm D. 2.5mm E. One third of the dentine thickness

Last Answer : C. 1.5 mm

For dental caries to progress in dentine, A. The dentine must contain soluble collagen B. Enamel must contain glycoproteins C. Diet must contain simple carbohydrate D. Diet must contain polysaccharides E. Pulp must contain complement

Description : For dental caries to progress in dentine, A. The dentine must contain soluble collagen B. Enamel must contain glycoproteins C. Diet must contain simple carbohydrate D. Diet must contain polysaccharides E. Pulp must contain complement

Last Answer : C. Diet must contain simple carbohydrate

Several approaches have been suggested to increase the fixation of professionally applied topical fluoride, which of the following statements IS INCORRECT regarding increasing the fixation? A. Increase concentration of fluoride in solutions B. Raise the PH of the fluoride solution C. Increase the exposure time to topical fluoride D. Pre-treat the enamel with 0.5% phosphoric acid E. Use NH4F rather than NaF at a lower PH

Description : Several approaches have been suggested to increase the fixation of professionally applied topical fluoride, which of the following statements IS INCORRECT regarding increasing the fixation? A. Increase concentration of ... with 0.5% phosphoric acid E. Use NH4F rather than NaF at a lower PH

Last Answer : B. Raise the PH of the fluoride solution

Which of the following anomalies occurs during the initiation and proliferation stages of tooth development A. Amelogenesis imperfecta (developmental defect) B. Dentinogenesis imperfecta (developmental defect) C. Enamel hypoplasia (AI type) D. Oligodontia E. Ankylosis

Description : Which of the following anomalies occurs during the initiation and proliferation stages of tooth development A. Amelogenesis imperfecta (developmental defect) B. Dentinogenesis imperfecta (developmental defect) C. Enamel hypoplasia (AI type) D. Oligodontia E. Ankylosis

Last Answer : D. Oligodontia

In preparing a very small proximal amalgam cavity on a molar tooth what would consider, A. Extend the cavity to the gingival margin B. Extend the cavity beyond the contacts areas C. Achieve at least 2mm in dentine D. Extend cavity just beyond dento enamel junction

Description : In preparing a very small proximal amalgam cavity on a molar tooth what would consider, A. Extend the cavity to the gingival margin B. Extend the cavity beyond the contacts areas C. Achieve at least 2mm in dentine D. Extend cavity just beyond dento enamel junction

Last Answer : D. Extend cavity just beyond dento enamel junction

While you finish a class I cavity, the enamel is sound but you notice a brown line in the dentine and on the Dento-enamel junction, what is your response, A. You leave it and complete the final restoration B. You extend your preparation and clean it C. You apply a cover of varnish

Description : While you finish a class I cavity, the enamel is sound but you notice a brown line in the dentine and on the Dento-enamel junction, what is your response, A. You leave it and complete the final restoration B. You extend your preparation and clean it C. You apply a cover of varnish

Last Answer : B. You extend your preparation and clean it

On Xray hypoplasia of enamel is ( the enamel is thinner) A. radioluscent B. radiopaque C. can’t detect D. sometimes radiopaque, sometimes radioluscent

Description : On Xray hypoplasia of enamel is ( the enamel is thinner) A. radioluscent B. radiopaque C. can’t detect D. sometimes radiopaque, sometimes radioluscent

Last Answer : C. can’t detect

The final deposition of ameloblasts occurs in:** A. Primary enamel cuticle B. Secondary enamel cuticle C. Acquired enamel cuticle D. Cementum

Description : The final deposition of ameloblasts occurs in:** A. Primary enamel cuticle B. Secondary enamel cuticle C. Acquired enamel cuticle D. Cementum

Last Answer : A. Primary enamel cuticle

Odontogenic cysts develop from the following structures except: A. Reduced enamel epithelium of tooth crown B. Dental lamina dura C. Epithelium trapped after sutures D. ertwig’s root sheath

Description : Odontogenic cysts develop from the following structures except: A. Reduced enamel epithelium of tooth crown B. Dental lamina dura C. Epithelium trapped after sutures D. ertwig’s root sheath

Last Answer : C. Epithelium trapped after sutures

A patient has improperly formed DEJ, reduction in size of pulp chamber, chipping and attrition of enamel that would MOSTLY be: A. Fluorosis B. Amelogenesis imperfecta C. Dentinogenesis imperfecta

Description : A patient has improperly formed DEJ, reduction in size of pulp chamber, chipping and attrition of enamel that would MOSTLY be: A. Fluorosis B. Amelogenesis imperfecta C. Dentinogenesis imperfecta

Last Answer : C. Dentinogenesis imperfecta

In class II preparation it is difficult to place the gingival seat when preparation is extended too gingivally because the: A. Enamel rods are directed occlusally B. Marked cervical constriction

Description : In class II preparation it is difficult to place the gingival seat when preparation is extended too gingivally because the: A. Enamel rods are directed occlusally B. Marked cervical constriction

Last Answer : B. Marked cervical constriction

Which of the following statements is true: A. Last secretion of odontoblast forms cementum B. Last secretion of odontoblast forms acquired enamel cuticle C. Remnants of ameloblasts form primary enamel cuticle D. Remnants of odontoblasts form primary enamel cuticle

Description : Which of the following statements is true: A. Last secretion of odontoblast forms cementum B. Last secretion of odontoblast forms acquired enamel cuticle C. Remnants of ameloblasts form primary enamel cuticle D. Remnants of odontoblasts form primary enamel cuticle

Last Answer : C. Remnants of ameloblasts form primary enamel cuticle

Which of the following is a radiographic feature of dentino-genesis imperfecta: A. Small pulp chambers and root canals, normal enamel B. Enamel is missing but dentine formation is normal C. Enamel and dentine show disturbances D. Pulp is normal but dentine is abnormal

Description : Which of the following is a radiographic feature of dentino-genesis imperfecta: A. Small pulp chambers and root canals, normal enamel B. Enamel is missing but dentine formation is normal C. Enamel and dentine show disturbances D. Pulp is normal but dentine is abnormal

Last Answer : A. Small pulp chambers and root canals, normal enamel

Which is the only dental tissue that loses its formative cells as it matures: A. Enamel B. Dentine C. Pulp D. Cementum

Description : Which is the only dental tissue that loses its formative cells as it matures: A. Enamel B. Dentine C. Pulp D. Cementum

Last Answer : A. Enamel

Where do Maryland bridges lose retention often: A. Resin-metal B. Resin enamel C. Resin layer

Description : Where do Maryland bridges lose retention often: A. Resin-metal B. Resin enamel C. Resin layer

Last Answer : A. Resin-metal

Which one of the following statement is correct, A. The remnants of Ameloblast contribute to the primary enamel cuticle B. the last secretion of the odontoblast is cementum X C. The last secretion of the ameloblast is the acquired of enamel cuticle D. The remnants of odontoblast form the primary enamel cuticle

Description : Which one of the following statement is correct, A. The remnants of Ameloblast contribute to the primary enamel cuticle B. the last secretion of the odontoblast is cementum X C. The ... ameloblast is the acquired of enamel cuticle D. The remnants of odontoblast form the primary enamel cuticle

Last Answer : A. The remnants of Ameloblast contribute to the primary enamel cuticle

The gingiva of a child is diagnosed on the basis of all of these except of: A. Contour of gingival papilla B. Sulcus depth C. Contour of Nasmyth membrane (nasmyth description of the membrane is unclear that's why the term enamel cuticle is preferred D. Tight filling of gingival collar

Description : The gingiva of a child is diagnosed on the basis of all of these except of: A. Contour of gingival papilla B. Sulcus depth C. Contour of Nasmyth membrane (nasmyth description of the membrane is unclear that's why the term enamel cuticle is preferred D. Tight filling of gingival collar

Last Answer : C. Contour of Nasmyth membrane (nasmyth description of the membrane is unclear that's why the term enamel cuticle is preferred

which one of the following statement is correct, A. The remnants of Ameloblast contribute to the primary enamel cuticle B. the last secretion of the odontoblast is cementum C. The last secretion of the ameloblast is the acquired of enamel cuticle D. The remnants of odontoblast form the primary enamel cuticle

Description : which one of the following statement is correct, A. The remnants of Ameloblast contribute to the primary enamel cuticle B. the last secretion of the odontoblast is cementum C. The last ... is the acquired of enamel cuticle D. The remnants of odontoblast form the primary enamel cuticle

Last Answer : A. The remnants of Ameloblast contribute to the primary enamel cuticle