.Which of the following is true regarding preparation of custom tray for elastomeric impression: A. Adhesive is preferred over perforation B. Perforation provides adequate retention C. Adhesive is applied immediately before procedure D. Perforations are not made in the area over the prepared tooth

.Which of the following is true regarding preparation of custom tray for elastomeric impression:
A. Adhesive is preferred over perforation
B. Perforation provides adequate retention
C. Adhesive is applied immediately before procedure
D. Perforations are not made in the area over the prepared tooth
by

1 Answer

Answer :

A. Adhesive is preferred over perforation
by

Related questions

Which of the following is true regarding preparation of custom tray for elastomeric impression: a. Adhesive is preferred over perforation. b. Perforation provides adequate retention c. Adhesive is applied immediately before procedure d. Perforations are not made in the area over the prepared tooth .

Description : Which of the following is true regarding preparation of custom tray for elastomeric impression: a. Adhesive is preferred over perforation. b. Perforation provides adequate retention c. Adhesive is ... before procedure d. Perforations are not made in the area over the prepared tooth .

Last Answer : a. Adhesive is preferred over perforation.

An impression with elastomer in custom tray has been taken for crown preparation; it will be two days before the impression gets to the laboratory for construction of the crown. Which impression material is preferred? A. Polyether B. Thiokol or meraptan rubber C. Condensation silicone D. Vinyl polysiloxane

Description : An impression with elastomer in custom tray has been taken for crown preparation; it will be two days before the impression gets to the laboratory for construction of the crown. Which impression ... A. Polyether B. Thiokol or meraptan rubber C. Condensation silicone D. Vinyl polysiloxane

Last Answer : D. Vinyl polysiloxane

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

You can increase the retention of a Maryland bridge by: A. Incorporating mesh work in wax pattern B. Perforation techniques in the metal cast

Description : You can increase the retention of a Maryland bridge by: A. Incorporating mesh work in wax pattern B. Perforation techniques in the metal cast

Last Answer : A. Incorporating mesh work in wax pattern

How long should acrylic self-cure special trays been made prior to taking impression: A. 12 hrs B. Immediately after fabricating it C. After been left in water for an hour D. Wait for an hour before pouring

Description : How long should acrylic self-cure special trays been made prior to taking impression: A. 12 hrs B. Immediately after fabricating it C. After been left in water for an hour D. Wait for an hour before pouring

Last Answer : A. 12 hrs

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

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

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

.For an onlay preparation, which of the following is the MOST EFFECTIVE means for verifying adequate occlusal clearance A. Wax bite chew in B. Proper depth cuts C. Visual inspection D. Articulating paper

Description : .For an onlay preparation, which of the following is the MOST EFFECTIVE means for verifying adequate occlusal clearance A. Wax bite chew in B. Proper depth cuts C. Visual inspection D. Articulating paper

Last Answer : A. Wax bite chew in

A cast crown fits on the die but not on the tooth, the discrepancy is about 0.3mm, what would you do: A. Relieve cast from the inside B. Take a new impression and make new crown C. Burnish margins D. Use thick mix of cement

Description : A cast crown fits on the die but not on the tooth, the discrepancy is about 0.3mm, what would you do: A. Relieve cast from the inside B. Take a new impression and make new crown C. Burnish margins D. Use thick mix of cement

Last Answer : B. Take a new impression and make new crown

After making an impression to reline an RPD the dentist notes that the indirect retainers are not resting on the tooth. To avoid this, what process should have undertaken initially: A. Ask patient to bite firmly while impression is setting B. Hold the metal base frame against the abutment tooth while setting C. Fabricate new denture D. Add impression material and close the gap

Description : After making an impression to reline an RPD the dentist notes that the indirect retainers are not resting on the tooth. To avoid this, what process should have undertaken initially: A. Ask ... abutment tooth while setting C. Fabricate new denture D. Add impression material and close the gap

Last Answer : B. Hold the metal base frame against the abutment tooth while setting

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

The retention pin in an amalgam restoration should be placed, A. Parallel to the outer wall B. Parallel to the long axis of tooth

Description : The retention pin in an amalgam restoration should be placed, A. Parallel to the outer wall B. Parallel to the long axis of tooth

Last Answer : A. Parallel to the outer wall

During mouth preparation for RPD on tooth adjacent to edentulous area. There is dentine exposure: A. Restoration is required B. Proceed with rest seat preparation and fabrication if involved area is not more than 2mm

Description : During mouth preparation for RPD on tooth adjacent to edentulous area. There is dentine exposure: A. Restoration is required B. Proceed with rest seat preparation and fabrication if involved area is not more than 2mm

Last Answer : A. Restoration is required

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

Description : 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

Last Answer : E. None of the above

Which of the following is true in relation to dental decay? A. Foods that require vigorous mastication will increase salivary flow and reduce PH B. Tooth brushing immediately after meals is most effective because demineralisation has already started C. Food that encourage the mastication will increase the number of lymphocytes in saliva and thus reduce decay D. Vigorous mastication will increase plaque PH and lead to reduce of decays E. The Stephan Curve describes an increase in PH during a meal with resultant of demineralisation

Description : Which of the following is true in relation to dental decay? A. Foods that require vigorous mastication will increase salivary flow and reduce PH B. Tooth brushing immediately after meals is most ... E. The Stephan Curve describes an increase in PH during a meal with resultant of demineralisation

Last Answer : E. The Stephan Curve describes an increase in PH during a meal with resultant of demineralisation

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

Which one of following statement about Overdenture is not correct: A. Greater occlusal loads can be applied by the patient B. Retention and stability are generally better than with conventional complete denture C. Alveolar bone resorption is reduced D. The retained roots are covered by the denture thus protecting them from caries and periodontal diseases

Description : Which one of following statement about Overdenture is not correct: A. Greater occlusal loads can be applied by the patient B. Retention and stability are generally better than with ... The retained roots are covered by the denture thus protecting them from caries and periodontal diseases

Last Answer : D. The retained roots are covered by the denture thus protecting them from caries and periodontal diseases

In regard to apically displaced flap, what is TRUE: A. Does not preserve attached gingivae B. Does not lengthen crown of tooth C. Is a pocket elimination procedure D. A & C

Description : In regard to apically displaced flap, what is TRUE: A. Does not preserve attached gingivae B. Does not lengthen crown of tooth C. Is a pocket elimination procedure D. A & C

Last Answer : C. Is a pocket elimination procedure

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

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

Description : 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

Last Answer : A. Just supragingival whenever is possible

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

When the enamel of the tooth is exposed to preparation containing high concentrations of fluoride the major reaction is: M07 A. Sodium fluoride B. Calcium fluoride C. Stannous fluoride D. Fluoroapatite

Description : When the enamel of the tooth is exposed to preparation containing high concentrations of fluoride the major reaction is: M07 A. Sodium fluoride B. Calcium fluoride C. Stannous fluoride D. Fluoroapatite

Last Answer : D. Fluoroapatite

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

A healthy 6 years-old child presents with carious maxillary second primary molar with a necrotic pulp. Which treatment would be preferred? A. Extraction B. Indirect pulp treatment C. Pulpotomy (it's done to preserve the vitality of the roots and allow normal exfoliation) D. Pulpectomy to preserve the tooth as a space manteiner. E. Antibiotic coverage

Description : A healthy 6 years-old child presents with carious maxillary second primary molar with a necrotic pulp. Which treatment would be preferred? A. Extraction B. Indirect pulp treatment C. ... normal exfoliation) D. Pulpectomy to preserve the tooth as a space manteiner. E. Antibiotic coverage

Last Answer : D. Pulpectomy to preserve the tooth as a space manteiner.

.When correction preparation for re contouring of occlusal surface is to be applied, grinding only of the adjusted surface: A. Should not be felt flat B. Requires a flat crown C. Requires no contact with adjacent teeth D. Should be felt flat

Description : .When correction preparation for re contouring of occlusal surface is to be applied, grinding only of the adjusted surface: A. Should not be felt flat B. Requires a flat crown C. Requires no contact with adjacent teeth D. Should be felt flat

Last Answer : A. Should not be felt flat

The removable partial denture requires relining what would be the most appropriate action, A. take a new impression by asking the patient to occlude on it B. Provide equal space (maybe it was thickness) between denture and gingival tissues. C. Make sure the framework and retainers are seated in place before taking impression

Description : The removable partial denture requires relining what would be the most appropriate action, A. take a new impression by asking the patient to occlude on it B. Provide equal space (maybe it was ... gingival tissues. C. Make sure the framework and retainers are seated in place before taking impression

Last Answer : C. Make sure the framework and retainers are seated in place before taking impression

Which impression material should NOT be kept in water within on hour: (in another paper it was: 30 mins before pouring) A. Polyether B. Condensation silicone C. Polyvinyl silicone

Description : Which impression material should NOT be kept in water within on hour: (in another paper it was: 30  mins before pouring)  A. Polyether  B. Condensation silicone  C. Polyvinyl silicone 

Last Answer : A. Polyether 

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

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

In bridge work, which of the followings terms is NOT CORRECT: A. A retainer could be a crown to which a bridge is attached to B. A connector connects a pontic to a retainer or two retainers to each other C. The saddle is the area of the edentulous ridge over which the pontic will lie and comes in contact with pontic D. A pontic is an artificial tooth as part of a bridge

Description : In bridge work, which of the followings terms is NOT CORRECT: A. A retainer could be a crown to which a bridge is attached to B. A connector connects a pontic to a retainer or two retainers to each ... lie and comes in contact with pontic D. A pontic is an artificial tooth as part of a bridge

Last Answer : C. The saddle is the area of the edentulous ridge over which the pontic will lie and comes in contact with pontic

What is NOT characteristic of root canal filing materials (“obturation material”) A. Tacky adhesive to walls B. Radio opaque C. Not irritating D. Quick in setting

Description : What is NOT characteristic of root canal filing materials (“obturation material”) A. Tacky adhesive to walls B. Radio opaque C. Not irritating D. Quick in setting

Last Answer : D. Quick in setting

.In developing plaque; the adhesive polymer produced by streptococcus mutans is synthesis from: A. Glucose B. Fructose C. Sucrose D. Lactose E. Amylose

Description : .In developing plaque; the adhesive polymer produced by streptococcus mutans is synthesis from: A. Glucose B. Fructose C. Sucrose D. Lactose E. Amylose

Last Answer : C. Sucrose

A partial denture that seats on the master cast but fails to seat correctly in the mouth is a result of, A. Contraction of the metal framework during casting B. Insufficient expansion of the investment material C. Distortion of impression D. Failure to block out unwanted undercuts

Description : A partial denture that seats on the master cast but fails to seat correctly in the mouth is a result of, A. Contraction of the metal framework during casting B. Insufficient expansion of the investment material C. Distortion of impression D. Failure to block out unwanted undercuts

Last Answer : C. Distortion of impression

The polysulfide rubber impression materials are: A. Not sensitive to temperature when curing B. Quite sensitive to temperature when curing C. Less sensitive to temperature than silicone rubber D. The same sensitivity to temperature as silicone rubber E. None of the above

Description : The polysulfide rubber impression materials are: A. Not sensitive to temperature when curing B. Quite sensitive to temperature when curing C. Less sensitive to temperature than silicone rubber D. The same sensitivity to temperature as silicone rubber E. None of the above

Last Answer : B. Quite sensitive to temperature when curing

Elastomers are:** A. Hydrophilic B. Hydrophobic C. Water-loving impression material D. Potassium alginates E. None of the above

Description : Elastomers are:** A. Hydrophilic B. Hydrophobic C. Water-loving impression material D. Potassium alginates E. None of the above

Last Answer : B. Hydrophobic

Dental impression materials are hydrocolloids of: A. The emulsoid type B. The suspension type C. The sol type D. The gel type E. None of the above

Description : Dental impression materials are hydrocolloids of: A. The emulsoid type B. The suspension type C. The sol type D. The gel type E. None of the above

Last Answer : A. The emulsoid type

The disadvantage of heating the impression compound in a water bath is: A. It may become brittle B. It may become grainy C. Lower moles with constituents are leached out D. The plasticity of the compound may be altered E. All of the above

Description : The disadvantage of heating the impression compound in a water bath is: A. It may become brittle B. It may become grainy C. Lower moles with constituents are leached out D. The plasticity of the compound may be altered E. All of the above

Last Answer : D. The plasticity of the compound may be altered

Fusion temperature of impression compound should occur: A. Below mouth temperature B. Above mouth temperature C. As of the skin temperature D. At the room temperature E. None of the above

Description : Fusion temperature of impression compound should occur: A. Below mouth temperature B. Above mouth temperature C. As of the skin temperature D. At the room temperature E. None of the above

Last Answer : B. Above mouth temperature

Which one of the following is the major disadvantage of stone dies used for crown fabrication, A. They lack accurate reproduction of surface details B. Their overall dimensions are slightly smaller than the original impression C. The strength of the stone D. The hazard of aspiration of toxic materials during trimming of the dies.

Description : Which one of the following is the major disadvantage of stone dies used for crown fabrication, A. They lack accurate reproduction of surface details B. Their overall dimensions are slightly smaller than ... of the stone D. The hazard of aspiration of toxic materials during trimming of the dies.

Last Answer : A. They lack accurate reproduction of surface details

To minimize the load on a free-end saddle partial denture: (distal extension saddle) A. Use teeth with narrow Buccal-Lingual dimension B. Use mucco-compressive impression

Description : To minimize the load on a free-end saddle partial denture: (distal extension saddle) A. Use teeth with narrow Buccal-Lingual dimension B. Use mucco-compressive impression

Last Answer : B. Use mucco-compressive impression

.Oil or water on impression for treatment casts causes: A. An increase of the quality B. No alteration C. A decrease of the quality D. Bubbles on the cast

Description : .Oil or water on impression for treatment casts causes: A. An increase of the quality B. No alteration C. A decrease of the quality D. Bubbles on the cast

Last Answer : C. A decrease of the quality

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

What is the property of high copper amalgam A. Reduced physical creep B. Higher retention

Description : What is the property of high copper amalgam A. Reduced physical creep B. Higher retention

Last Answer : A. Reduced physical creep

Swallowing will aid in the diagnosis of: A. Branchial cyst B. Thyroglossal duct cyst C. Ranula D. Retention cyst E. Globulomaxillary cyst

Description : Swallowing will aid in the diagnosis of: A. Branchial cyst B. Thyroglossal duct cyst C. Ranula D. Retention cyst E. Globulomaxillary cyst

Last Answer : B. Thyroglossal duct cyst

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