2 Flashcards by Love Dog

The amount of tooth reduction on the incisal of the upper anterior teeth for PFM tooth

a. 1.2 mm
b. 1.5 mm
c. 2.0 mm

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The minimum recommended amount of tooth reduction for a metal ceramic restoration on cusps of upper posterior teeth.

a.1.3 mm
b. 1.7 mm
c. 2.5 mm

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An all-ceramic crown has cosmetic advantages over the metal-ceramic restoration. However, the metal-ceramic crown may be a better choice to serve as a retainer for fixed dental prostheses because its metal substructure can accommodate cast or soldered connectors.

a. The first statement is true and the second statement is true.
b. The first statement is true and the second statement is false.
c. Both of the statements are true but the reasons are true
d. Both statements are false

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The type of restoration material that has superior strength and allows their use in higher stress situations.
a. All-ceramic crowns
b. Metal-ceramic crowns
c. Cast alloy crowns
d. Charles III crown

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The degree of difficulty of a metal ceramic preparation is comparable with that of preparing a posterior tooth for a complete cast crown.
a. True
b. False
c. Somewhat true
d. Irrelevant

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To achieve better esthetics, the facial margin of an anterior FM restoration Is often placed
a. Supragingivally and chamfered
b. Subgingivally and beveled shoulder
c. Equi-gingivally and shoulder margin
d. Subgingivally by 1 mm and shoulder margin

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Amount of reduction needed for a PFM crown tooth preparation on the lingual wall.
a. 6 mm
b. 5 - 6 mm
C. 0.5 - 0.6 mm
d. 1.0 - 1.2 mm

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Width or amount of reduction of facial finish lines for PFM crown tooth preparation
a. 1.0 mm - 1.2 mm
b. 1.3 mm - 1.5 mm
c. 0.1 mm - 0.3 mm
d. 0.3 mm - 0.5 mm

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A metal-ceramic crown is subject to brittle fracture and such failure is attributable to;

a. Poor substructure design
b. Poor fabrication technique
c. Difficulty in achieving accurate shade
d. A and B and C

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Disadvantage/s of a metal ceramic crowns over all-ceramic crowns

a. May appear slightly blueish in comparison with the translucency that can be achieved w/ all-ceramic

b. Have slightly Inferior esthetic

c. Increases the potential for periodontal disease with subgingival margin

d. Band C

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The linguo-incisal clearance for FM crown tooth preparation should be
a. 5.1 mm
b. 1.5 cm
c. 1.5 mm
d. 1.0 mm
e. 0.5 mm

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The following armamentarium are needed to prepare teeth for a metal-ceramic crown, EXCEPT

a. Flat-ended tapered diamond burs
b. Round-ended tapered diamond burs
c. Football or flame shaped burs d. Low speed spoon and fork carbide burs
e. None of the choices

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Depth grooves should be placed in two planes. The incisal/occlusal portion parallels the long axis of the tooth, and the cervical portion follows the normal facial contour.

a Both statements are correct
b. Both statements are false
c. The second statement is correct and the first statement is wrong
d. The first statement is correct and the second statement is wrong

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Mothball-shaped diamond bur is recommended in reduction of lingual surface of anterior teeth.
a. True
b. False

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a posterior tooth, if occlusal surface is to be established in porcelain, clearance must be a minimum of
a. 0.2 mm
b. 2.0 mm
C. 1.2 mm

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Incisal clearance for metal-ceramic crown preparation
a. 2.0 cm b. 2.0 mm C. 0.2 mm
d. 1.5 mm

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Common cause of inadequacies in retention and resistance form in the completed preparation
a. Excessive occlusal reduction
b. Shortened axial preparation walls
c. Inadequate tooth reduction d.AandB

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The completed chamfer margin should provide 5.0 mm of space for the restoration at the margin.
a. TRUE
b. FALSE

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The minimum required thickness of porcelain on top of metal substructure to produce a restoration with satisfactory esthetics.
a. 12 mm
b. 1.7 mm
c. 2.0 mm
d.12 mm

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The recommended taper for proximoaxial opposing walls.
a. 6 degrees
b. 8 degrees
c. 2 degrees.
d. 10 degrees

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Amount of lingual concavity reduction on anterior teeth if centric contacts in the completed restoration are to be located on metal.
a.10mm
b. 0.5 mm
c. 1.0 mm
d.1.5 mm

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A properly finished margin should be;

a. Smooth and continuous circumferentially and rounded internal line angles
b. Smooth and non-continuous and with sharp internal line angles
c. Smooth and continuous except on the lingual as It should be chamfered.
d. Smooth and continuous with circumferential bevel and round internal line angles.

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This facilitates surface wetting and expedites Impression making, pouring of casts, waxing and investing;
a. Sharp line angles
b. Rounded line angles
c. Flat line angles d. 90° - line angles

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Tooth with large pulp chamber is not contraindicated for metal-ceramic crown.
a. True
b. False

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Technique used in the proximal reduction to protect the tooth from inadvertent damage A. Reduce the proximal wall but maintaining a "lip" of enamel using needle shaped bur B. Reduce proximal walls from labial to lingual with flat end super fine grit bur C. Reduce proximal walls carefully from incisal to cervical with bur in slightly oblique position D. AandC E. AandBandC

The cervical groove is made parallel to the path of placement which usually coincides with the long axis of the tooth. A. True B. False

Tooth with large pulp chamber is not contraindicated for metal-ceramic crown. A. True B. False

Advantage of a complete ceramic crown includes increased strength of the restoration because of the presence of reinforcing metal substructure; A. TRUE B. FALSE C. Metal suprastructure

This requirement of a uniform thickness circumferentially especially of the margin is for; A. Metal-ceramiccrowns B. All-ceramiccrowns

Requires less reduction of the facial surface A. Metal-ceramic crown tooth preparation B. All-ceramiccrowntoothpreparation,

Wear has been observed on the non-functional surfaces of natural teeth that oppose porcelain restorations. This also applies to teeth opposed by metal-ceramic restorations, especially the mandibular incisors. A. Both statements are correct B. First statement is correct and the second statement is wrong. C. First statement is FALSE and the second statement is TRUE. D. Bothstatementsareincorrect.

The metal-ceramic crown is indicated in areas with a high esthetic requirement; A. FALSE B. TRUE

The recommended reduction for all-ceramic crowns; A. 1.2 mm labial, 1.5 mm incisal, 1.5 mm lingual B. 1.5 mm labial, 2.0 mm incisal, 1.5 mm lingual C. 1.0 mm labial, 2.5 mm incisal, 1.0 mm lingual D. 1.0 mm labial, 1.5 mm incisal, 1.0 mm lingual

. All-ceramic crown is contraindicated for patients with parafunctional activity. A. TRUE B. FALSE C. DOIHAVETOSAYTHEWORD?

the ultimate objective is to direct stresses optimally in the completed porcelain restoration; A. This is accomplished when the chamfer margin or rounded shoulder margin completely supports the crown. B. Do a heavy chamfer margin with 1 mm wide, have rounded internal angle, smooth and continuous and free of any irregularities C. BothAandB D. None of the choices

Patients taking anticoagulant drugs may be an issue during treatment because of procedures that might result to hemorrhage. A. True B. False C. Neither

Objective to achieve the best esthetic effect is one of the primary function of restoring missing teeth. A. True B. False

Patient’s age is important during the treatment planning stage, requesting a medical clearance or a check up is advisable. A. 20y.o.andabove B. 40y.o.andabove C. Moribundpatient D. ASA6patient

Patients with allergy to food and drugs may need some data requested from previous medical provider for proper identification of specific allergic reaction to medication. This is part of a A. Medical history B. Dentalhistory C. Socioeconomichistory D. Dietaryhistory

The periodontal disease information, dental deformities, or recent therapy should be in the A. Medicalhistory B. Dentalhistory C. Socioeconomichistory D. Dietaryhistory

Palpating the neck area for glandular enlargement is part of A. Intraoralexamination B. Extraoralexamination C. Pulpvitalitytest D. Dentalradiography

Is the process used to identify an existing abnormal condition to investigate the abnormality and to determine its cause. A. Prognosis B. Diagnosis C. Hypothesis D. Conclusion

Reproductions of patients maxillary and mandibular arches, it is an important source of information in arriving a diagnosis of the patient case. A. Mastercast B. Diagnosticcast C. Refractorycast D. Podcast

A force which will cause a restoration to move circumferentially around the tooth. A. Rotatingforce B. Tippingforce C. PathofinsertionForce D. Lateralforce

. A force which is exerted by sticky foods interposed between the artificial substitutes and opposing teeth A. Rotational force B. Tipping force C. Path of insertion force D. Lateralforce

A buccolingual or mesiodistal directed force which occurs during food mastication. A. Rotationalforce B. Tippingforce C. Pathofinsertionforce D. Lateralforce

What is the ideal total convergence of the taper of the preparation. A. 5to7degrees B. 3to5degrees C. 1to3degrees D. 45degreestotal

The best location for placement of a box or a groove in full veneer abutment preparation is A. middle of the proximal surface B. middle of the buccal surface middle of the lingual surface don the occlusal surface

The most effective type of irregularity produced during tooth preparation A. grooves B. pinholes C. boxes D. retentionpin

The most effective type of irregularity produced during anterior tooth preparation A. grooves B. pinholes C. boxes D. Pins

Unacceptable finish line A. chamfer B. shoulder C. knife edge D. feather edge

tooth preparation finish line most often used in tipped teeth. A. chamfer B. shoulder C. knifeedge D. shoulderwithbevel

Preferred finish line for fixed prosthodontics A. chamfer B. shoulder C. shoulderwithbevel D. knifeedge

Cervical finish line used for ceramic restorations. A. shoulder B. chamfer C. shoulder with bevel D. knife edge

Tooth colored ceramic material may need to have greater reduction compared to casted metal material. A. True B. False

Diamond cutting instruments used for more rapid removal of tooth structure is A. coarsegrit. B. mediumgrit C. coarseandmediumgrit D. finegrit

Grooves are created using A. 169 tapered fissure B. 170 tapered fissure C. AandB D. none of the above

When checking preparation distal area of a 2nd maxillary molar, the only method of viewing A. directvision. B. useoffiberoptichandpiece C. indirectvisionwithamirror D. multiplelightsources

The best means of conserving tooth structure and usually causes less pulp damage is by A. fullcoveragepreparation B. partialcoveragepreparation. C. AandB D. noneoftheabove

During tooth reduction, Handpieces delivers the most effective coolant by A. Water stream B. Water spray C. Air D. None of the above

Advantage of worn diamond instrument or partially dull bur A. Causesrapidreductionoftoothstructure B. Smooththepreparation C. Afastertoothpreparationprocedure D. Coolerpreparationdone

When subgingival preparation must be done for esthetic purposes. A. Placement of Retraction cords in the gingival tissue B. Gingiva must be carefully held out of contact from the diamond cutting instruments C. AandB D. None of the above

. The replacement of missing teeth with fixed prostheses generally provides sufficient resistance to flow of air to allow normal speech sounds to be produced, thereby preferred than removable prostheses. A. True B. False

Fixed Prostheses is indicated to adolescent patients due to high esthetic demand. A. True B. False

Before being restored, endodontically tooth should be carefully evaluated for the following, except; A. GoodApicalseal B. Noactiveinfection C. Noexudate D. NoApicalsensitivity E. Nodiscoloration

Endodontically treated teeth are stronger than vital teeth. Their moisture content may increase. A. Both statements are true B. Both statements are false C. First statement is true, second statement is false D. First statement is false, second statement is true E. Both statements are nonsense

Custom cast post and core restorations exhibited slightly higher failure rates than did amalgam foundations. A. TRUE B. FALSE

Cemented post may further limit or complicate endodontic retreatment options, because it will cause root fracture A. First statement is true, second statement is false B. First statement is false, second statement is true C. Both statements are true D. Both statements are false

Discoloration in the absence of significant tooth loss may be more effectively treated by bleaching than by placement of a complete crown. It has 100% success rate. A. First statement is true, second statement is false B. First statement is false, second statement is true C. Bothstatementsaretrue D. Both statements are False

If more than 2mm of coronal tooth structure remains, the post design probably has a limited role in the fracture resistance of the restored tooth. A. NOTTRUE B. NOTFALSE

The following are the features of successful design in preparing the canal except, A. Marginextension B. Apical seal C. Positive horizontal stop D. Adequate post length E. Maximum canal enlargement

The use of prefabricated post entails enlarging the canal 5x the file size to obtain good fit. The prefabricated, post should not extend to the apical seal. A. B. C. D. First statement is true, second statement is false First statement is false, second statement is true Both statements are true Both statements are false

First statement is false, second statement is true

A metal band or ring used to fit the root or crown of a tooth, as opposed to a crown that merely encircles core material. It helps bind remaining tooth structure together. a. Trephine b. Ferrule c. Gates Glidden d. Peeso reamers e. Metal coping

The effect of apical preparation on crown-to-root ratio on surgical crown lengthening procedures. A. Increasesrootlength B. Increasescrownlength C. Reducesrootlength D. AAndB E. BandC

Long posts are more likely to result in root fracture. A. TRUE B. FALSE

In restoring an endodontically treated maxillary first Molar with reasonable amount of coronal tissue remains, use of a single metal post should be cemented in the; A. Mesiobuccal root canal B. Distobuccal root canal C. Palatal root canal D. Mesiopalatal root canal E. Distopalatal root cana

During preparation of the canal of a normal tooth, apical seal should not be disturbed, leave around- of root canal filling material. A. 2mm B. 3mm C. 4mm D. 5mm E. 6mm

The greatest stress concentrâtions are found at the margin, particularly interproximally and at the apex. A. TRUE B. FALSE

This rotary drill is used only to parallel the walls of the post space. A. GatesGlidden B. PeesoReamers C. Twistdrills D. EndoFile E. Lentulo

These are the methods that are commonly used to remove gutta-percha, except; A. Using Chemical agents B. Using rotary instruments C. Using a warmed endodontic plugger D. Using high speed instruments, higshspeed and burs are contraindicated E. Using warm endodontic files

A Parallel-sided post conforms better to the canals than does a tapered post. A. TRUE B. FALSE

This replaces missing coronal tooth structure and in combination with the remaining coronal tissue, forms the shape of the optimal tooth preparation. A. Abutment B. Post C. Core D. Waxbuild-up E. Retainer

Technique in pattern fabrication where you dip a small brush in monomer and then into polymer and applying it to the post. A. Saltandpepper B. Brushbead C. Liquidpowder D. Brushink E. Blackbead

Failure rate of restorations under single crowns was significantly lower than restorations under Fixed Bridge. A. TRUE B. FALSE

To reduce the need for endodontic re-treatment, endodontically treated teeth should be restored as soon as endodontic procedure is complete. A. TRUE B. FALSE

Stresses generated in canal may lead to fracture, not conservative of coronal and radicular tooth structure. A. Carbon fiber post B. Parallel-sided prefabricated post C. Wovenfiberpost D. Taperedprefabricatedpost E. Threaded post-book

Not recommended for teeth under lateral load, except; A. Glass fiber post B. Wovenfiberpost C. Threadedpost-book D. Carbonfiberpost E. Resinpost

Recommended for small circular canals A. Tapered prefabricated post B. Threadedpost C. Carbonfiberpost D. Zirconiapost E. Glassfiberpost

Which of the following steps is not Included in direct pattern fabrication A. Usingplasticrod-check B. brush-beadtechnique C. Lubricatethecanal-chick D. Insertorthodonticwire E. Investandcast

Recommended for small circular canals a. Tapered prefabricated post - table b. Threaded post c. Carbon fiber post d. Zirconia post e. Glass fiber post

Masserann technique for the removal of fractured post includes the following except; a. The diameter of the post is gauged -true b. Create a narrow channel around the post c. Use trephine d. Use ultrasonic scaled

With the use of these materials have this advantage of conserving of tooth structure and straightforward technique, except; a. Amalgam X b. Custom cast post and core c. Glass lonomer d. Composite resin e. None V

Ideal for Elliptical or flared canals a. Amalgam b. Custom cast post and core-notes c. Glass lonomer d. Composite resin e. None

Retrospective studies of the fiber post systems generally have shorter longevity than metal post. a. TRUE b. FALSE

Not recommended for excessively flared canals a. Carbon fiber post b. Parallel-sided prefabricated post c. Woven fiber post d. Tapered prefabricated post - e. Threaded post

The following statement/s is/are correct about the two plane reductions; A. On premolars and molars, cervical and occlusal planes often approximate each other in height. B. Excessive convergence should be avoided because this may lead to pulpal exposure C. On incisors and canines, the cervical plane is typically about two thirds of the preparation height, whereas the second plane is approximately one third of the preparation height. D. AAndB

Shoulder margin for PM crown preparation must extend at least 1 mm lingual to proximal contact point; A. FALSE, it should extend 2 mm lingually B. TRUE C. FALSE, It must not extend lingually and should be confined only up to mid-proximal

. To improve retention and resistance form on small teeth, subgingival shoulder margin of 0.5 mm apical to the crest of free gingiva should be considered, thus; A. Subgingival margin on the facial should extend well into the proximal embrasures B. Refining this shoulder margin from the proximal gingival crest toward the middle of the facial wall is preferred. C. If the margin Is prepared from the facial to proximal aspects, there is a tendency to bury the Instrument and encroach on the epithelial attachment. D. AandBandC

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