Why can Class IV gold not be used in cavity as a filling material: A. Can not be polished “burnished” B. The corrosive properties

Why can Class IV gold not be used in cavity as a filling material:
A. Can not be polished “burnished”
B. The corrosive properties
by

1 Answer

Answer :

A. Can not be polished “burnished”
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Related questions

In class II restorations, all of the following are considered to occur as probable causes of periodontal problems except: A. Flat ridge B. Faulty or not proper contour C. Not properly polished restoration D. Cervical wall is too deeply apical E. Overextension of lining in cavity

Description : In class II restorations, all of the following are considered to occur as probable causes of periodontal problems except: A. Flat ridge B. Faulty or not proper contour C. Not properly polished restoration D. Cervical wall is too deeply apical E. Overextension of lining in cavity

Last Answer : E. Overextension of lining in cavity

Patient has hot and cold sensation and pain on percussion after the filling of class III Cavity with GIC base and composite. What will be possible cause – 1) bacterial microleakage 2) mechanical trauma of cavity cutting 3) Exothermic reaction while setting GIC

Description : Patient has hot and cold sensation and pain on percussion after the filling of class III Cavity with GIC base and composite. What will be possible cause – 1) bacterial microleakage 2) mechanical trauma of cavity cutting 3) Exothermic reaction while setting GIC

Last Answer : 2) mechanical trauma of cavity cutting

Before filling a class V abrasion cavity with GIC you should(+adc March07) A. Clean with pumice, rubber cup, water and weak acid B. Dry the cavity thoroughly before doing anything C. Acid itch cavity then dry thoroughly

Description : Before filling a class V abrasion cavity with GIC you should(+adc March07) A. Clean with pumice, rubber cup, water and weak acid B. Dry the cavity thoroughly before doing anything C. Acid itch cavity then dry thoroughly

Last Answer : A. Clean with pumice, rubber cup, water and weak acid

A patient complains of sensitivity, on examination you find a composite filling restoring a good cavity preparation without any secondary caries; what is your next step: A. Extirpate the pulp that is obviously inflamed B. Place ZOE dressing to sedate the pulp C. Ask patient to come back in six months D. Repeat restoration

Description : A patient complains of sensitivity, on examination you find a composite filling restoring a good cavity preparation without any secondary caries; what is your next step: A. Extirpate the pulp that is obviously ... to sedate the pulp C. Ask patient to come back in six months D. Repeat restoration

Last Answer : B. Place ZOE dressing to sedate the pulp

High copper amalgams are superior A. Copper is available for a secondary reaction B. Copper is not available for a secondary reaction C. Copper is burnished D. Copper is fractured E. None of the above

Description : High copper amalgams are superior A. Copper is available for a secondary reaction B. Copper is not available for a secondary reaction C. Copper is burnished D. Copper is fractured E. None of the above

Last Answer : A. Copper is available for a secondary reaction

.The most resistant filling materials to fill class IV cavities are: A. Resins with silicone dioxide (SiO2) B. Resins with glass or quartz C. Silico-phosphate D. Silicates

Description : .The most resistant filling materials to fill class IV cavities are: A. Resins with silicone dioxide (SiO2) B. Resins with glass or quartz C. Silico-phosphate D. Silicates

Last Answer : B. Resins with glass or quartz

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

Class V composite resin restorations can be polished, A. 24 hours after application B. Immediately after application C. 3 to 4 days D. 3 to 4 weeks E. Not at all

Description : Class V composite resin restorations can be polished, A. 24 hours after application B. Immediately after application C. 3 to 4 days D. 3 to 4 weeks E. Not at all

Last Answer : B. Immediately after application

At what angle to the external surface should proximal cavosurface walls in Class II preparation for the reception of an amalgam filling be finished: A. Acute angle B. Right angle C. Obtuse angle D. 45 angle

Description : At what angle to the external surface should proximal cavosurface walls in Class II preparation for the reception of an amalgam filling be finished: A. Acute angle B. Right angle C. Obtuse angle D. 45 angle

Last Answer : C. Obtuse angle

Occlusal cavity with extension of the buccal fissure is classified as, A. Class II B. Class III C. Class I D. Class V

Description : Occlusal cavity with extension of the buccal fissure is classified as, A. Class II B. Class III C. Class I D. Class V

Last Answer : C. Class I

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

In the preparation of Premolar class I cavity what is the best way of getting retention, A. Slightly done undercut of the mesial and distal walls B. Slightly done undercut of the buccal and lingual walls C. The convergence of the cavity walls

Description : In the preparation of Premolar class I cavity what is the best way of getting retention, A. Slightly done undercut of the mesial and distal walls B. Slightly done undercut of the buccal and lingual walls C. The convergence of the cavity walls

Last Answer : B. Slightly done undercut of the buccal and lingual wall

The pulpal floor of the Class II cavity for a mandibular first premolar should be: GA.Parallel to occlusal plane B. Perpendicular to long axis C. Tilted lingually

Description : The pulpal floor of the Class II cavity for a mandibular first premolar should be: GA.Parallel to occlusal plane B. Perpendicular to long axis C. Tilted lingually

Last Answer : GA.Parallel to occlusal plane

At which angle to the external surface of proximal cavity walls should a class II preparation for amalgam be finished A. An acute angle B. An obtuse angle si es el cajon proximal C. A right angle D. An angle of 45°

Description : At which angle to the external surface of proximal cavity walls should a class II preparation for amalgam be finished A. An acute angle B. An obtuse angle si es el cajon proximal C. A right angle D. An angle of 45°

Last Answer : B. An obtuse angle si es el cajon proximal

When preparing a class III cavity for composite restoration; in which situation should acid itching be used: A. Always should be performed to minimise marginal leakage B. Should not be performed because it might damage the adjacent tooth C. When extra retention is required D. Only in situations where cavity is shallow to avoid pulp irritation

Description : When preparing a class III cavity for composite restoration; in which situation should acid itching be used: A. Always should be performed to minimise marginal leakage B. Should not be ... extra retention is required D. Only in situations where cavity is shallow to avoid pulp irritation

Last Answer : A. Always should be performed to minimise marginal leakage

Which of the following Gold casting alloys are available: A. Medium alloy “Type II” B. ard alloy “Type III” C. Extra ard alloy “Type IV” D. All of the above

Description : Which of the following Gold casting alloys are available: A. Medium alloy “Type II” B. ard alloy “Type III” C. Extra ard alloy “Type IV” D. All of the above

Last Answer : D. All of the above

The type of gold that is used for dental bridges is, A. Hard 18% B. Type IV 75%

Description : The type of gold that is used for dental bridges is, A. Hard 18% B. Type IV 75%

Last Answer : B. Type IV 75%

.In regard to Gold casting alloys which one is available for bridge A. Hard alloy “Type IV B. Type II

Description : .In regard to Gold casting alloys which one is available for bridge A. Hard alloy “Type IV B. Type II

Last Answer : A. Hard alloy “Type IV

Patient reported to you 30 min after trauma to central incisor. Patient is 10 yrs old and there is traumatic exposure of pulp. What will be the line of treatment— 1) coronal pulpotomy and Ca-hydr. Base and then permanent filling 2) Ca-hydroxide base and permanent filling 3) 1-2 mm. of coronal pulp extirpated and Ca hydroxide and then permanent filling 4) Pulpectomy

Description : Patient reported to you 30 min after trauma to central incisor. Patient is 10 yrs old and there is traumatic exposure of pulp. What will be the line of treatment- 1) coronal pulpotomy and Ca-hydr. ... 3) 1-2 mm. of coronal pulp extirpated and Ca hydroxide and then permanent filling 4) Pulpectomy

Last Answer : 3) 1-2 mm. of coronal pulp extirpated and Ca hydroxide and then permanent filling

An 8 years-old child who has sustained a fracture of maxillary permanent central incisor in which 2mm of the pulp is exposed presents for treatment three hours after injury. Which of the following should be considered? a- Remove the surface 1. 2 mm of pulp tissue and place calcium hydroxide. b- Place calcium hydroxide directly on the exposed pulp. c- Pulpotomy using formocresol. d- Pulpectomy and immediate root filling. e- Pulpectomy and apexification.

Description : An 8 years-old child who has sustained a fracture of maxillary permanent central incisor in which 2mm of the pulp is exposed presents for treatment three hours after injury. Which of the ... - Pulpotomy using formocresol. d- Pulpectomy and immediate root filling. e- Pulpectomy and apexification.

Last Answer : a- Remove the surface 1. 2 mm of pulp tissue and place calcium hydroxide

A female patient comes to you complaining of persistent pain in a heavily restored central incisor; you suspect pulpitis and you have been told that she is in transit leaving by plane next day. Your treatment will be, A. Remove filling and place a sedative dressings B. Pulp extirpation and obturate with Ledermix dressings C. Prescribe analgesics and systemic antibiotic

Description : A female patient comes to you complaining of persistent pain in a heavily restored central incisor; you suspect pulpitis and you have been told that she is in transit leaving by plane ... B. Pulp extirpation and obturate with Ledermix dressings C. Prescribe analgesics and systemic antibiotic

Last Answer : B. Pulp extirpation and obturate with Ledermix dressings

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

The MAIN purpose of burnishing is: A. To help eliminating excess mercury (condensing) B. To condense margins C. Polishing of filling

Description : The MAIN purpose of burnishing is: A. To help eliminating excess mercury (condensing) B. To condense margins C. Polishing of filling

Last Answer : B. To condense margins

X rays are used in endodontic treatment to: A. Aid in the diagnosis of periapical hard tissue lesion B. Determine the number, location, shape, size and direction of roots and root canals C. Confirm the length of root canals D. Evaluate the adequacy of the complete root canal filling E. All of the above

Description : X rays are used in endodontic treatment to: A. Aid in the diagnosis of periapical hard tissue lesion B. Determine the number, location, shape, size and direction of roots and root canals C. Confirm ... root canals D. Evaluate the adequacy of the complete root canal filling E. All of the above

Last Answer : E. All of the above

What indicates for a periapical surgery: A. Where performing an endodontic treatment on existing root canal filling may lead to fracture of the root B. When root canal treatment is faulty C. When there is danger of involving other structures D. When the bony defect is so extensive that the edges of the incisors will collapse E. None of the above

Description : What indicates for a periapical surgery: A. Where performing an endodontic treatment on existing root canal filling may lead to fracture of the root B. When root canal treatment is faulty C. When ... bony defect is so extensive that the edges of the incisors will collapse E. None of the above

Last Answer : A. Where performing an endodontic treatment on existing root canal filling may lead to fracture of the root

In RCT the ideal root filling: A. Ends at the apex B. Extends beyond apex to achieve a good seal C. Ends at the dentino-cemental junction

Description : In RCT the ideal root filling: A. Ends at the apex B. Extends beyond apex to achieve a good seal C. Ends at the dentino-cemental junction

Last Answer : C. Ends at the dentino-cemental junction

.In regard to the glass of quartz particles of filling restorative resin; the microfill resins tend to have, A. A higher coefficient of thermal expansion and a higher crashing strength B. A higher coefficient of thermal expansion and a lower crashing strength C. A lower coefficient of thermal expansion and a higher crashing strength D. A lower coefficient of thermal expansion and a lower crashing strength

Description : .In regard to the glass of quartz particles of filling restorative resin; the microfill resins tend to have, A. A higher coefficient of thermal expansion and a higher crashing strength B. ... and a higher crashing strength D. A lower coefficient of thermal expansion and a lower crashing strength

Last Answer : B. A higher coefficient of thermal expansion and a lower crashing strength

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

8 years old child who has sustained a fracture of maxillary permanent central incisor in which 2mm of the pulp is exposed; presents for treatment three hours after injury. Which of the following should be considered? M07*********** A. Remove the surface 1-2 mm of pulp tissue and place calcium hydroxide (Cvek pulpotomy, apexogenesis) B. Place calcium hydroxide directly on the exposed pulp C. Pulpotomy using formocresol D. Pulpectomy and immediate root filling E. Pulpectomy and apexification

Description : 8 years old child who has sustained a fracture of maxillary permanent central incisor in which 2mm of the pulp is exposed; presents for treatment three hours after injury. Which of the ... C. Pulpotomy using formocresol D. Pulpectomy and immediate root filling E. Pulpectomy and apexification

Last Answer : A. Remove the surface 1-2 mm of pulp tissue and place calcium hydroxide (Cvek pulpotomy, apexogenesis)

Pin Restoration with which material has the best retention: A. Amalgam B. Gold inlay C. Composite D. Glass Ionomer

Description : Pin Restoration with which material has the best retention:  A. Amalgam  B. Gold inlay  C. Composite  D. Glass Ionomer 

Last Answer : C. Composite 

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

Description : 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

Last Answer : D. Wrought gold

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

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

The MOST common sites for squamous carcinoma in the oral cavity are:** A. Palate and gingivae B. Tongue and floor of the mouth C. Tongue and palate

Description : The MOST common sites for squamous carcinoma in the oral cavity are:** A. Palate and gingivae B. Tongue and floor of the mouth C. Tongue and palate

Last Answer : B. Tongue and floor of the mouth

To achieve optimum cavity preparation, which of the following factors of internal anatomy must be considered in root canal treatment: A. Outline form B. The age and shape of pulp chamber; in addition to the direction of individual root canals. C. Internal external relationship D. Intra-coronal preparation E. None of the above

Description : To achieve optimum cavity preparation, which of the following factors of internal anatomy must be considered in root canal treatment: A. Outline form B. The age and shape of pulp chamber; in ... root canals. C. Internal external relationship D. Intra-coronal preparation E. None of the above

Last Answer : B. The age and shape of pulp chamber; in addition to the direction of individual root canals.

The principle cause of failure of amalgam restoration is: A. Improperly prepared amalgam B. Improper cavity preparation C. Perio involvement D. Particles of amalgam

Description : The principle cause of failure of amalgam restoration is: A. Improperly prepared amalgam B. Improper cavity preparation C. Perio involvement D. Particles of amalgam

Last Answer : B. Improper cavity preparation

At birth, the oral cavity usually contains: A. S. mutans only B. No micro organism C. S. mutans and S. salivavis D. Lactobacilli and S. mutans

Description : At birth, the oral cavity usually contains: A. S. mutans only B. No micro organism C. S. mutans and S. salivavis D. Lactobacilli and S. mutans

Last Answer : B. No micro organism

Sensitivity to hot and cold foods soon after cavity preparation and placement of GIC and composite resin in an upper incisor tooth is due to: A. Mechanical trauma due to cavity preparation B. Chemical C. Heat from GIC settings

Description : Sensitivity to hot and cold foods soon after cavity preparation and placement of GIC and composite resin in an upper incisor tooth is due to: A. Mechanical trauma due to cavity preparation B. Chemical C. Heat from GIC settings

Last Answer : A. Mechanical trauma due to cavity preparation

What is the danger of using air as a cooler during cavity cutting: A. Hypersensitivity B. Odontoblast is drawn into the tubule

Description : What is the danger of using air as a cooler during cavity cutting: A. Hypersensitivity B. Odontoblast is drawn into the tubule

Last Answer : B. Odontoblast is drawn into the tubule

The best method of cleaning and toilet cavity: A. Alcohol B. Citric acid C. Water D. Organic acid

Description : The best method of cleaning and toilet cavity: A. Alcohol B. Citric acid C. Water D. Organic acid

Last Answer : D. Organic acid

Which cement is less soluble in the oral cavity: A. Polycarboxylate B. Zinc phosphate C. Silicate phosphate D. GIC

Description : Which cement is less soluble in the oral cavity: A. Polycarboxylate B. Zinc phosphate C. Silicate phosphate D. GIC

Last Answer : D. GIC

.Which of the following is true: A. Antibiotics are useful in the treatment of periodontitis B. Trauma from occlusion causes thickening of the marginal gingivae C. Periodontitis is the primary cause of teeth lost after the age of 35. D. All periodontal pockets can be identified by x-ray E. Periodontitis is the most common disease in the oral cavity

Description : .Which of the following is true:  A. Antibiotics are useful in the treatment of periodontitis   B. Trauma from occlusion causes thickening of the marginal gingivae  C. Periodontitis is the ... can be identified by x-ray  E. Periodontitis is the most common disease in the oral cavity

Last Answer : E. Periodontitis is the most common disease in the oral cavity

An old male presents complaining of having numerous white lesions in the oral cavity within past few days. Prior to this the family physician prescribed chlorite tetracycline for an upper respiratory infection, the patient is taking this antibiotic for the past two weeks; lesions are relatively non-painful, slightly elevated, adhered plaques on the lip mucosa, buccal mucosa and the tongue. MOST LIKELY to be:

Description : An old male presents complaining of having numerous white lesions in the oral cavity within past  few days. Prior to this the family physician prescribed chlorite tetracycline for an upper  respiratory infection, ... plaques on the lip mucosa, buccal mucosa and  the tongue. MOST LIKELY to be: 

Last Answer : Moniliasis (Which is candidiasis) 

Upper first premolar with MO cavity; what is important about the application of the matrix band (the question has also shown too as ….What is complicated by): A. The mesial concavity of the root surface B. Small lingual pulp C. High buccal pulp horn D. High lingual pulp horn E. Concavity of distal root surface

Description : Upper first premolar with MO cavity; what is important about the application of the matrix band (the question has also shown too as .What is complicated by): A. The mesial concavity of the root ... pulp C. High buccal pulp horn D. High lingual pulp horn E. Concavity of distal root surface

Last Answer : A. The mesial concavity of the root surface

.What is the most common malignant lesion that occurs in the oral cavity: A. Ameloblastoma B. Squamous cell carcinoma C. Osteosarcom

Description : .What is the most common malignant lesion that occurs in the oral cavity: A. Ameloblastoma B. Squamous cell carcinoma C. Osteosarcom

Last Answer : B. Squamous cell carcinoma

the pulp horn most likely to be exposed in the preparation of large cavity in permanent molar tooth is,CHECK ITS VERY CONTROVERSIAL QUESTION A. Mesio–Lingual in upper first molars B. Mesio–Buccal in upper first molars C. Disto–buccal in lower first molars D. Mesio–Lingual in lower first molars E. Mesio- Buccal in lower first molar

Description : the pulp horn most likely to be exposed in the preparation of large cavity in permanent molar tooth is,CHECK ITS VERY CONTROVERSIAL QUESTION A. Mesio-Lingual in upper first molars B. Mesio-Buccal in ... first molars D. Mesio-Lingual in lower first molars E. Mesio- Buccal in lower first molar

Last Answer : B. Mesio–Buccal in upper first molars

Benign migratory glossitis or Geographic Tongue, manifests itself in the oral cavity as, A. Irregularly outlined areas of hyperkeratosis of the dorsal surface of the tongue B. Furrows outlined the dorsal surface radiating out from a central groove in the centre of the tongue C. Loss (atrophy) of filiform papillae in multiple irregularly outlined areas D. Irregularly outlined erythematous area of hyper trophic fungiform E. A fibrinous exudate on the dorsal surface F. Grooves (fissures) radiating from a central fissure G. Irregular area in the midline of the tongue

Description : Benign migratory glossitis or Geographic Tongue, manifests itself in the oral cavity as, A. Irregularly outlined areas of hyperkeratosis of the dorsal surface of the tongue B. Furrows outlined the ... (fissures) radiating from a central fissure G. Irregular area in the midline of the tongue

Last Answer : C. Loss (atrophy) of filiform papillae in multiple irregularly outlined areas

The best way to clean a cavity before the placement of GIC is,** A. H2O2 B. Phosphoric Acid C. Polyacrylic acid 10% sturdavent 563pag

Description : The best way to clean a cavity before the placement of GIC is,** A. H2O2 B. Phosphoric Acid C. Polyacrylic acid 10% sturdavent 563pag

Last Answer : C. Polyacrylic acid 10% sturdavent 563pag

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

Description : 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 ... III, IV C. I, II, V D. None of the above E. All of the above

Last Answer : C. I, II, V

Longest lasting resin restorations are, A. Class I B. Class II C. Class III D. Class IV

Description : Longest lasting resin restorations are,  A. Class I   B. Class II  C. Class III  D. Class IV 

Last Answer : C. Class III