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°

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°
by

1 Answer

Answer :

B. An obtuse angle si es el cajon proximal
by

Related questions

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

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

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

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

Function of matrix band: A. Substitute for the missing wall so adequate condensation forces can be applied B. Permit re-establishment of proper contact lines C. Restrict extrusion of amalgam and prevent formation of an “overhang” D. Provide adequate physiological contour for the proximal surface E. Provide an acceptable surface texture to the proximal surface F. All of the above

Description : Function of matrix band: A. Substitute for the missing wall so adequate condensation forces can be applied B. Permit re-establishment of proper contact lines C. Restrict extrusion of amalgam and prevent ... E. Provide an acceptable surface texture to the proximal surface F. All of the above

Last Answer : F. All of the above

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.

Contact force always acts at A. acute angles to the surface producing it B. right angles to the surface producing it C. obtuse angle to the surface producing it D. parallel to the surface producing it

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Last Answer : right angles to the surface producing it

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

The optimum cavosurface angle for occlusal amalgam surface is: A. 45-60° B. 70-85° C. 45-80° D. 95-110° E. 130-150°

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Last Answer : D. 95-110°

A vital tooth has a crown cemented to a pin-retained amalgam core; where does a failure occur: A. Between crown and cement B. Between core and cement C. In the crown and the root D. In the core and the margin preparation

Description : A vital tooth has a crown cemented to a pin-retained amalgam core; where does a failure occur: A. Between crown and cement B. Between core and cement C. In the crown and the root D. In the core and the margin preparation

Last Answer : B. Between core and cement

The cervical finish line of a full veneer crown preparation should be placed: A. Just supragingival whenever is possible B. According to the depth of gingival crevice C. Subgingival to reduce ability of recurrent caries D. At the junction of tooth and amalgam core

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Last Answer : A. Just supragingival whenever is possible

Retention for occlusal amalgam cavities in premolars is BEST provided by A. Slightly undercutting of walls with inversed cone bur B. Mesial and distal undercuts C. Buccal and lingual undercuts

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Last Answer : C. Buccal and lingual undercuts

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

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

The most common cause of fracture at the isthmus of class II dental amalgam restoration is: A. Delayed expansion B. Inadequate depth at the isthmus area C. Inadequate width at the isthmus area

Description : The most common cause of fracture at the isthmus of class II dental amalgam restoration is: A. Delayed expansion B. Inadequate depth at the isthmus area C. Inadequate width at the isthmus area

Last Answer : B. Inadequate depth at the isthmus area

What is the most common fracture of Class II amalgam restorations: A. Isthmus because of insufficient depth B. Internal fracture C. Marginal ridge site

Description : What is the most common fracture of Class II amalgam restorations: A. Isthmus because of insufficient depth B. Internal fracture C. Marginal ridge site

Last Answer : A. Isthmus because of insufficient depth

What shape has 3 right angles and 1 obtuse angle and 1 acute angle?

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Force due to magnetic field and velocity is A. at right angles to each other B. at acute angles with each other C. at obtuse angle with each other D. antiparallel to each othe

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Last Answer : at right angles to each other

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

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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

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

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

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

A object moves with uniform positive acceleration. Its velocity-time graph will be (a) A straight line parallel to the time axis (b) A straight line inclined at an obtuse angle to the time axis (c) A straight line inclined at an acute angle to the time axis (d) None of these. -Science

Description : A object moves with uniform positive acceleration. Its velocity-time graph will be (a) A straight line parallel to the time axis (b) A straight line inclined at an obtuse angle to the time axis (c) A straight line inclined at an acute angle to the time axis (d) None of these. -Science

Last Answer : Answer is (c)

Which letter from the keybord 3 acute angle and 2 obtuse and have 5 angles?

Description : Which letter from the keybord 3 acute angle and 2 obtuse and have 5 angles?

Last Answer : The letter A.

Which letter from the keybord 3 acute angle and 2 obtuse?

Description : Which letter from the keybord 3 acute angle and 2 obtuse?

Last Answer : It is the letter A.

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

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

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

In radiographs, an incipient carious lesion limited to the end of the proximal surface of a posterior tooth appears as: A. Radiopaque area B. Triangle with apex towards the tooth surface C. Larger in radiographs than actual lesion D. All of the above E. None of the above

Description : In radiographs, an incipient carious lesion limited to the end of the proximal surface of a posterior tooth appears as: A. Radiopaque area B. Triangle with apex towards the tooth surface C. Larger in radiographs than actual lesion D. All of the above E. None of the above

Last Answer : B. Triangle with apex towards the tooth surface

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

What is TRUE in regard to the preparation of occlusal rests: A. Use an inverted cone bur B. Use a flat fissure bur C. Parallel to occlusal plane D. At right angle to the long axis of tooth E. None of the above

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Last Answer : E. None of the above

After the placement of a class I amalgam the patient comes back to you complaining of pain on masticating and biting; what is the first thing you would look at, A. Occlusal height B. Contacts areas

Description : After the placement of a class I amalgam the patient comes back to you complaining of pain on masticating and biting; what is the first thing you would look at, A. Occlusal height B. Contacts areas

Last Answer : A. Occlusal height

Occasional sensitivity in a shallow class I amalgam restoration after two days would be managed by: A. Replace old filing immediately B. Oxide Zinc and eugenol C. Using thicker mix of cements D. Tell patient the discomfort will disappear after 4 t o6 weeks E. Ledermix

Description : Occasional sensitivity in a shallow class I amalgam restoration after two days would be managed by: A. Replace old filing immediately B. Oxide Zinc and eugenol C. Using thicker mix of cements D. Tell patient the discomfort will disappear after 4 t o6 weeks E. Ledermix

Last Answer : D. Tell patient the discomfort will disappear after 4 t o6 weeks

Recession of gingiva of several anterior teeth caused by exposure and softened cementum; what would you do? A. Scrap the soften cementum and apply fluoride B. Scrap the soften cementum and use GIC C. Class V amalgam

Description : Recession of gingiva of several anterior teeth caused by exposure and softened cementum; what would you do? A. Scrap the soften cementum and apply fluoride B. Scrap the soften cementum and use GIC C. Class V amalgam

Last Answer : B. Scrap the soften cementum and use GIC

Amalgam restoration, when do you have to replace it? a. Ditching of the edges. b. The probe penetrates the area between the margin and tooth tissue. c. Fissure of the surface of the amalgam. d. When there is chronic inflammation of the pulp.

Description : Amalgam restoration, when do you have to replace it? a. Ditching of the edges. b. The probe penetrates the area between the margin and tooth tissue. c. Fissure of the surface of the amalgam. d. When there is chronic inflammation of the pulp.

Last Answer : c. Fissure of the surface of the amalgam.

When restoring weakened cusps with dental amalgam you should consider: A. 2mm reduction while forming a flattened surface B. 2mm reduction while following the original contour of the cusps C. 4mm reduction while forming a flattened surface D. 4mm reduction while following the original contour of the surface

Description : When restoring weakened cusps with dental amalgam you should consider: A. 2mm reduction while forming a flattened surface B. 2mm reduction while following the original contour of the cusps C ... forming a flattened surface D. 4mm reduction while following the original contour of the surface

Last Answer : A. 2mm reduction while forming a flattened surface

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

Caries which is close to the pulp chamber; on x rays you find ‘dens in dente’; the right treatment is: A. Zinc oxide eugenol cement and amalgam B. Pulpectomy C. Pulpotomy D. Calcium hydroxide on pulp and amalgam

Description : Caries which is close to the pulp chamber; on x rays you find ‘dens in dente’; the right treatment is: A. Zinc oxide eugenol cement and amalgam B. Pulpectomy C. Pulpotomy D. Calcium hydroxide on pulp and amalgam

Last Answer : B. Pulpectomy

If used, in which direction should pinholes be placed? a. parallel to the long axis of the tooth b.parallel to the nearest external surface c. at a 15 degree angle to the long axis of the tooth d. perpendicular to the gingival floor e. directly below and parallel to restored cusp tip

Description : If used, in which direction should pinholes be placed? a. parallel to the long axis of the tooth b.parallel to the nearest external surface c. at a 15 degree angle to the long axis of the tooth d. perpendicular to the gingival floor e. directly below and parallel to restored cusp tip

Last Answer : b.parallel to the nearest external surface

If x = 35, is the triangle acute, right, or obtuse?

Description : If x = 35, is the triangle acute, right, or obtuse?

Last Answer : acute

is the triangle acute, right, or obtuse?

Description : is the triangle acute, right, or obtuse?

Last Answer : obtuse

If x = 25, is the triangle acute, right, or obtuse?

Description : If x = 25, is the triangle acute, right, or obtuse?

Last Answer : right

What if two angles are equal and supplementary are the angles obtuse acute or right angles?

Description : What if two angles are equal and supplementary are the angles obtuse acute or right angles?

Last Answer : They both will be right angles that add up to supplementaryangles 180 degrees

What if two angles are equal and supplementary are the angles obtuse acute or right angles?

Description : What if two angles are equal and supplementary are the angles obtuse acute or right angles?

Last Answer : They both will be right angles that add up to supplementaryangles 180 degrees

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

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

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

Last Answer : A. Can not be polished “burnished”

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

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

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

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