What is the minimal labial reduction for porcelain metal crowns: A. 1mm B. 1.5mm C. 0.5mm

What is the minimal labial reduction for porcelain metal crowns:
A. 1mm
B. 1.5mm
C. 0.5mm
by

1 Answer

Answer :

B. 1.5mm
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Related questions

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

An advantage of metal. ceramic crowns, compared wit full ceramic crowns for restoring anterior teeth is, A. Palatal reduction may be of minimal thickness. B. Overall conservative for tooth structure. C. Ability to watch the appearance of adjacent natural teeth. D. Less laboratory time.

Description : An advantage of metal. ceramic crowns, compared wit full ceramic crowns for restoring anterior teeth is, A. Palatal reduction may be of minimal thickness. B. Overall conservative for tooth structure. C. Ability to watch the appearance of adjacent natural teeth. D. Less laboratory time.

Last Answer : A. Palatal reduction may be of minimal thickness.

An advantage of metal-ceramic crowns, compared wit full ceramic crowns for restoring anterior teeth is, A. Palatal reduction may be of minimal thickness B. Overall conservative for tooth structure C. Ability to watch the appearance of adjacent natural teeth D. Less laboratory time

Description : An advantage of metal-ceramic crowns, compared wit full ceramic crowns for restoring anterior teeth is, A. Palatal reduction may be of minimal thickness B. Overall conservative for tooth structure C. Ability to watch the appearance of adjacent natural teeth D. Less laboratory time

Last Answer : A. Palatal reduction may be of minimal thickness

The width of the normal periodontal ligament space is: A. 0.25 to 0.5mm B. 1mm

Description : The width of the normal periodontal ligament space is: A. 0.25 to 0.5mm B. 1mm

Last Answer : A. 0.25 to 0.5mm

How much space do you need to cap a weakened cusp with amalgam: A. 1mm B. 1.5mm C. 2mm D. 2.5mm

Description : How much space do you need to cap a weakened cusp with amalgam: A. 1mm B. 1.5mm C. 2mm D. 2.5mm

Last Answer : C. 2mm

The major cause of jacket crown breakage is, A. Inclusion of platinum foil B. Use of weak cementum C. Voids of porcelain D. Porcelain is thinner than 1mm

Description : The major cause of jacket crown breakage is, A. Inclusion of platinum foil B. Use of weak cementum C. Voids of porcelain D. Porcelain is thinner than 1mm

Last Answer : D. Porcelain is thinner than 1mm

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

The clinical advantage of porcelain laminate veneers over composite resin veneers is: A. Color stability and resistance to abrasion B. Availability of self-curing or light activated placement (yes but not necessary a clinical advantage) C. Minimal over-contouring of the treated teeth ( not necessarily true depends on the dentist's abilities) D. May be used in edge to edge occlusion or Class III relationships.

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Last Answer : A. Color stability and resistance to abrasion

When primary molars are prepared for stainless steel crowns, should the depth for reduction of the proximal surface be similar to the depth of the buccal and lingual surfaces? A. Yes; reduction of all wall is similar for best retention B. No, proximal reduction is greater to allow the crown to pass the contact area C. No, the buccal surfaces has the greatest reduction to remove the cervical bulge D. Yes, all undercuts are uniformly removed so that the steel crown can be seated E. No, because of lateral constriction, the lingual surface needs greatest reduction

Description : When primary molars are prepared for stainless steel crowns, should the depth for reduction of the proximal surface be similar to the depth of the buccal and lingual surfaces? A. Yes; reduction ... can be seated E. No, because of lateral constriction, the lingual surface needs greatest reduction

Last Answer : B. No, proximal reduction is greater to allow the crown to pass the contact area

A leaf spring consists of 3 extra full length leaves and 14 graduated length leaves. The maximum force that can act on the spring is 70kN and the distance between eyes of the spring is 1.2m. Width and thickness of the leaves are 100mm and 12mm respectively. If modulus of elasticity is 207000N/mm², calculate the initial nip. (a) 26.8mm (b) 24.9mm (c) 22.5mm (d)23.1mm

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Last Answer : b) 24.9mm

“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

When should metallic framework not be contaminated during the fabrication of a porcelain fused to metal crown: A. Between bisque stage and glazing stage B. Between preheat and opaque stages C. Between opaque and bisque stages D. Between one opaque and two opaque stages

Description : When should metallic framework not be contaminated during the fabrication of a porcelain fused to metal crown: A. Between bisque stage and glazing stage B. Between preheat and opaque stages C. Between opaque and bisque stages D. Between one opaque and two opaque stages

Last Answer : B. Between preheat and opaque stages

The most common failure in constructing porcelain to metal is: A. Improper metal framework B. Rapid heating

Description : The most common failure in constructing porcelain to metal is: A. Improper metal framework B. Rapid heating

Last Answer : A. Improper metal framework

A lateral incisor labial to the arch needs to be restored in normal alignment with PFM retraction. How will the tooth appear: A. Too wide B. Too short C. To narrow D. To long

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Last Answer : C. To narrow

Spread of infection 12, 22 is MOST LIKELY to be: A. Labial B. Palatal

Description : Spread of infection 12, 22 is MOST LIKELY to be: A. Labial B. Palatal

Last Answer : B. Palatal

Ankyloglossia is caused by: A. Edentulous ridge B. Short lingual frenulum C. Short labial frenulum

Description : Ankyloglossia is caused by: A. Edentulous ridge B. Short lingual frenulum C. Short labial frenulum

Last Answer : B. Short lingual frenulum

A patient with impacted canine; by moving the X ray tube distally the canine moves distally too; where do you expect the impacted canine: A. Labially impacted B. Palatally impacted Eighty-five per cent of impacted maxillary permanent cuspids are palatal impactions, and 15% are labial impactions.

Description : A patient with impacted canine; by moving the X ray tube distally the canine moves distally too; where do you expect the impacted canine: A. Labially impacted B. Palatally impacted ... -five per cent of impacted maxillary permanent cuspids are palatal impactions, and 15% are labial impactions.

Last Answer : B. Palatally impacted Eighty-five per cent of impacted maxillary permanent cuspids are palatal impactions, and 15% are labial impactions.

The extraction of maxillary deciduous molar in 5 years old child; you should use: A. Mostly towards the apex pressure and some movement B. Rotation C. Distal pressure and movement D. Labial-lingual movement

Description : The extraction of maxillary deciduous molar in 5 years old child; you should use: A. Mostly towards the apex pressure and some movement B. Rotation C. Distal pressure and movement D. Labial-lingual movement

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To produce a stable correction of an upper labial segment in lingual crossbite; it is essential to:** A. Use fixed appliances B. Have adequate overbite C. Treat during growth D. Use posterior capping E. Increase vertical dimension

Description : To produce a stable correction of an upper labial segment in lingual crossbite; it is essential to:** A. Use fixed appliances B. Have adequate overbite C. Treat during growth D. Use posterior capping E. Increase vertical dimension

Last Answer : B. Have adequate overbite

When all other removable partial denture considerations remain unchanged; clasps constructed of which material can engage the deepest undercut: A. Chrome cobalt casts B. Nickel chrome casts C. Wrought stainless steel (0,5mm) D. Wrought gold

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Last Answer : D. Wrought gold

The percentage of total dentine surface / dentinal tubules 0.5mm away from pulp is,** A. 20% B. 50%

Description : The percentage of total dentine surface / dentinal tubules 0.5mm away from pulp is,** A. 20% B. 50%

Last Answer : B. 50%

Characteristic of mucogingival involvement: a. A pocket of more than 4 mm depth. b. Only 1mm of attached gingiva remains. c. Pocket extends to the mucogingival junction.

Description : Characteristic of mucogingival involvement: a. A pocket of more than 4 mm depth. b. Only 1mm of attached gingiva remains. c. Pocket extends to the mucogingival junction.

Last Answer : c. Pocket extends to the mucogingival junction.

After obturation and on X-ray you notice the obturation materials are 1mm beyond apex. What is your first management? A. Refill the canal B. Pull the GP cone about 1mm out and take a new X-ray C. Leave it as it

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Last Answer : B. Pull the GP cone about 1mm out and take a new X-ray

In cavity preparation 1mm below DEJ what is seen: A. More dentinal tubules, some intertubular and peritubular B. Some dentinal tubules, more intertubular and less peritubular C. More peritubular, some intertubular and dentinal tubular D. Equal amount of dentinal tubules, intertubular and peritubular

Description : In cavity preparation 1mm below DEJ what is seen: A. More dentinal tubules, some intertubular and peritubular B. Some dentinal tubules, more intertubular and less peritubular C. More ... , some intertubular and dentinal tubular D. Equal amount of dentinal tubules, intertubular and peritubular

Last Answer : B. Some dentinal tubules, more intertubular and less peritubular

Characteristic of mucogingival involvement: A. A pocket of more than 4 mm depth B. Only 1mm of attached gingiva remains C. Pocket extends to the mucogingival junction

Description : Characteristic of mucogingival involvement: A. A pocket of more than 4 mm depth B. Only 1mm of attached gingiva remains C. Pocket extends to the mucogingival junction

Last Answer : C. Pocket extends to the mucogingival junction

On an X ray you find the cement of the previous root canal treatment is extending 1mm beyond the apex without any symptoms; what would you do: A. Remove restoration material and retreat B. Apiectomy C. Leave as is until any complications occur

Description : On an X ray you find the cement of the previous root canal treatment is extending 1mm beyond the apex without any symptoms; what would you do: A. Remove restoration material and retreat B. Apiectomy C. Leave as is until any complications occur

Last Answer : C. Leave as is until any complications occur

On an X ray you find the Gutta Percha cone extending 1mm beyond the apex without any symptoms, what would you do: A. Remove restoration material until you are able to withdraw the Gutta Percha cone B. Apiectomy C. Leave as is until any complications occur

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Last Answer : C. Leave as is until any complications occur

How much would you reduce a cusp to be replaced with amalgam onlay: A. 2 mm to achieve a good retention form B. 2mm to achieve a good resistance form C. 1mm

Description : How much would you reduce a cusp to be replaced with amalgam onlay: A. 2 mm to achieve a good retention form B. 2mm to achieve a good resistance form C. 1mm

Last Answer : B. 2mm to achieve a good resistance form

In a vital pulp therapy, what is the optimum depth for a pin hole in a tooth: A. 4-5mm B. Approximately 2mm C. Less than 2mm D. 1-1.5mm

Description : In a vital pulp therapy, what is the optimum depth for a pin hole in a tooth: A. 4-5mm B. Approximately 2mm C. Less than 2mm D. 1-1.5mm

Last Answer : A. 4-5mm

Gemination is: a. Division of single tooth, twining. b. Fusion of two or more crowns of teeth c. Fusion of two or more roots.

Description : Gemination is: a. Division of single tooth, twining. b. Fusion of two or more crowns of teeth c. Fusion of two or more roots.

Last Answer : a. Division of single tooth, twining.

Titanium is used in dentistry A. In a very pure form in implants B. In an alloy with aluminium in casting for crowns and bridges C. In an alloy with nickel in orthodontic wires D. A and B E. A, B and C

Description : Titanium is used in dentistry A. In a very pure form in implants B. In an alloy with aluminium in casting for crowns and bridges C. In an alloy with nickel in orthodontic wires D. A and B E. A, B and C

Last Answer : E. A, B and C

Gemination is:** A. Division of single tooth, twining B. Fusion of two or more crowns of teeth C. Fusion of two or more roots

Description : Gemination is:** A. Division of single tooth, twining B. Fusion of two or more crowns of teeth C. Fusion of two or more roots

Last Answer : A. Division of single tooth, twining

Which is correct in regard to shade selection of crowns: A. It should be selected before starting preparation B. Chroma is the lightness/darkness of colours C. Value is the colour itself D. Hue is the concentration of colours

Description : Which is correct in regard to shade selection of crowns: A. It should be selected before starting preparation B. Chroma is the lightness/darkness of colours C. Value is the colour itself D. Hue is the concentration of colours

Last Answer : A. It should be selected before starting preparation

The main factor controlling a decision to increase the occlusal height of teeth for extensive oral reconstruction is whether, A. the inter occlusal distance will be physiologically acceptable after treatment B. there will be sufficient tooth bulk in the abutment teeth for proper retention of the crowns C. at least two third of the original alveolar process will remain for adequate periodontal support D. the aesthetic appearance of the patient will improve sufficiently to warrant the planned reconstruction

Description : The main factor controlling a decision to increase the occlusal height of teeth for extensive oral reconstruction is whether, A. the inter occlusal distance will be physiologically ... the aesthetic appearance of the patient will improve sufficiently to warrant the planned reconstruction

Last Answer : A. the inter occlusal distance will be physiologically acceptable after treatment

The main factor controlling a decision to increase the occlusal height of teeth for extensive oral reconstruction is whether, A. The inter occlusal distance will be physiologically acceptable after treatment B. There will be sufficient tooth bulk in the abutment teeth for proper retention of the crowns C. At least two third of the original alveolar process will remain for adequate periodontal support D. The aesthetic appearance of the patient will improve sufficiently to warrant the planned reconstruction

Description : The main factor controlling a decision to increase the occlusal height of teeth for extensive oral reconstruction is whether, A. The inter occlusal distance will be physiologically ... . The aesthetic appearance of the patient will improve sufficiently to warrant the planned reconstruction

Last Answer : A. The inter occlusal distance will be physiologically acceptable after treatment

Porcelain must not be contaminated by handling between which two stages: A. Pre-soldering and heat treatment B. Heat treatment and opaque /bake/ stages C. Opaque and bisque stages D. Bisque and glazing stages E. First opaque bake and second opaque bake

Description : Porcelain must not be contaminated by handling between which two stages: A. Pre-soldering and heat treatment B. Heat treatment and opaque /bake/ stages C. Opaque and bisque stages D. Bisque and glazing stages E. First opaque bake and second opaque bake

Last Answer : A. Pre-soldering and heat treatment

The advantage of firing porcelain in vacuum:** A. Reduces size of air-bubbles incorporated thus decreasing porosity B. Removes water before firing, increasing the hardness of porcelain C. Significantly lowers firing temperature

Description : The advantage of firing porcelain in vacuum:** A. Reduces size of air-bubbles incorporated thus decreasing porosity B. Removes water before firing, increasing the hardness of porcelain C. Significantly lowers firing temperature

Last Answer : A. Reduces size of air-bubbles incorporated thus decreasing porosity

A labially displaced anterior tooth is restored with a gold core porcelain jacket crown so that it is in line with the arch; the crown will appears: A. Short B. Long C. Narrow D. Wide

Description : A labially displaced anterior tooth is restored with a gold core porcelain jacket crown so that it is in line with the arch; the crown will appears: A. Short B. Long C. Narrow D. Wide

Last Answer : C. Narrow

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

Why do you construct a lower removable partial denture with lingual bar: A. It is used when the space between raised floor, mouth and gingival margin is minimal B. Plaque accumulation is less than with lingual plate C. Should be made thicker when short

Description : Why do you construct a lower removable partial denture with lingual bar: A. It is used when the space between raised floor, mouth and gingival margin is minimal B. Plaque accumulation is less than with lingual plate C. Should be made thicker when short

Last Answer : B. Plaque accumulation is less than with lingual plate

A curette may be inserted to the level of the attached gingiva with minimal trauma to the tissues because of: A. Has a round base B. Is easy to sharpen C. Has rounded cutting edges D. Provides good tactile sensitivity

Description : A curette may be inserted to the level of the attached gingiva with minimal trauma to the tissues because of: A. Has a round base B. Is easy to sharpen C. Has rounded cutting edges D. Provides good tactile sensitivity

Last Answer : A. Has a round base

Typical features of Down’s syndrome (Mongolism) do not include: A. Multiple immunodeficiencies B. Sever caries but minimal periodontal disease C. Susceptibility to infections D. Multiple missing teeth and malocclusion E. Hepatitis B carriage in institutionalised patients

Description : Typical features of Down’s syndrome (Mongolism) do not include: A. Multiple immunodeficiencies B. Sever caries but minimal periodontal disease C. Susceptibility to infections D. Multiple missing teeth and malocclusion E. Hepatitis B carriage in institutionalised patients

Last Answer : B. Sever caries but minimal periodontal disease

Ball mills and tube mills with flint or porcelain balls are used for size reduction of (A) Asbestos (B) Rubber (C) Non-metallic ores (D) Limestone

Description : Ball mills and tube mills with flint or porcelain balls are used for size reduction of (A) Asbestos (B) Rubber (C) Non-metallic ores (D) Limestone

Last Answer : (C) Non-metallic ores

What is the difference between metal crowns and non-metal crowns? Which would be more beneficial?

Description : What is the difference between metal crowns and non-metal crowns? Which would be more beneficial?

Last Answer : Difference between the metal and non-metal crown is that, metal crown is made of some metal like chromium, molebdenum, palladium, even Gold etc, however nickel is not used; while non-metal ... for making costume jewelry, zirconia dental crowns are popular and advised by the dental health experts.

Community water fluoridation MOST effectively achieves: a. 90. 95% reduction of caries. b. 45. 55% reduction of caries. Esta se corrects si no tuviera la ultima opcion c. Reduces pit and fissures caries more than smooth surfaces. d. Reduces smooth surfaces more than pit and fissures.

Description : Community water fluoridation MOST effectively achieves: a. 90. 95% reduction of caries. b. 45. 55% reduction of caries. Esta se corrects si no tuviera la ultima opcion c. Reduces pit and fissures caries more than smooth surfaces. d. Reduces smooth surfaces more than pit and fissures.

Last Answer : d. Reduces smooth surfaces more than pit and fissures.

An endodontic therapy was completed on a tooth with a periapical radiolucency. Marked reduction in size of radiolucency is expected in approximately: A. One year B. 6 months C. 3 months

Description : An endodontic therapy was completed on a tooth with a periapical radiolucency. Marked reduction in size of radiolucency is expected in approximately: A. One year B. 6 months C. 3 months

Last Answer : A. One year

How long would it take to notice significant reduction in radiolucency after finishing a root filling in a tooth with a periapical lesion: A. 6 months B. 1 month C. 3 months

Description : How long would it take to notice significant reduction in radiolucency after finishing a root filling in a tooth with a periapical lesion: A. 6 months B. 1 month C. 3 months

Last Answer : A. 6 months

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

Community water fluoridation MOST effectively achieves is:** A. 90-95% reduction of caries B. 45-55% reduction of caries C. Reduces pit and fissures caries more than smooth surfaces D. Reduces smooth surfaces more than pit and fissures

Description : Community water fluoridation MOST effectively achieves is:** A. 90-95% reduction of caries B. 45-55% reduction of caries C. Reduces pit and fissures caries more than smooth surfaces D. Reduces smooth surfaces more than pit and fissures

Last Answer : D. Reduces smooth surfaces more than pit and fissures