Year5/FixedProsthodontics/Seun Visal/100-159

100. What is the difference between inlay and onlay?

σ� Onlay covers more than 1 cusp

σ� Inlay covers more than 1 cusp of the tooth

σ� Inlay is bigger

σ� Onlay covers all the cusps of a posterior tooth

101. Below are fixed prostheses, except:?

σ� Telescopic bridge

σ� Inlay/onlay

σ� Fixed partial denture

σ� Resin bonded bridge

The following are contra-indications for bridge, excepts:?

σ� Patient with severe systemic disease

σ� Patient with active caries

σ� Untreated periodontal disease

σ� Loss of 1 or 2 teeth

The following prostheses are all provide “complete cuspal coverage” for an abutment, except:?

σ� Maryland bridge

σ� Overlay

σ� Crown

σ� Fixed partial denture

These are types of fixed partial denture, except:?

σ� Telescopic bridge

σ� Cantilever bridge

σ� Fixed-movable bridge

σ� Maryland bridge

Radiographic examination could help identify all of the following, except:?

σ� Articular disc displacement

σ� Bone support

σ� Abnormality of the periodontium

σ� Periapical lesion

Damage to adjacent teeth in tooth preparation can be prevented by:?

σ� All of the above

σ� Leave fin of enamel

σ� Use metal matrix band

σ� Use mouth mirror to isolate the patient’s soft tissue for clearer access

108. For tooth with severe gum recession, the most appropriate finish line to avoid pulpal exposure is:?

σ� Feather edge

σ� Deep chamfer

σ� Shoulder

σ� Bevel shoulder

109. What finish line form requires the least tooth reduction:?

σ� Knife edge

σ� Bevel

σ� Shoulder

σ� Chamfer

110. For porcelain veneers, for maximum adaptation, the surface of the abutments need to be:?

σ� Smooth

σ� Rough

σ� Porous

σ� Any surface roughness

111.What articulator needs an arbitrary facebow?

σ� Semi-adjustable

σ� Kinematic articulator

σ� Fully-adjustable

σ� Hinge articulator

112. Which articulator among below produce the most accurate mandibular movement?

σ� Fully-adjustable

σ� Hinge

σ� Average value

σ� Semi-adjustable

113. For average value articulator, the incisal guidance is set to: ?

σ� 15 degrees

σ� 10 degrees

σ� 20 degrees

σ� 30 degrees

Semi-adjustable articulator can be used as following, except:?

σ� Record Benett movement

σ� Changes in vertical dimension

σ� Change in condylar guidance

σ� Set incisal guidance angle

115. The difference between Arcon and Non-arcon semi-adjustable articulators is:?

σ� In arcon: condyle is in lower member

σ� In arcon: condyle is in upper member

σ� In non-arcon: condyle is in lower member

σ� They are the same

116. What is tripod of vertical support in interocclusal record?

σ� 3-point contact between upper and lower casts: 1 at the front and 2 at the back providing vertical stability.

σ� 4-point contact between upper and lower casts: 1 at the front and 2 at the back providing vertical stability.

σ� 3-point contact between upper and lower casts: 2 at the front and 1 at the back providing vertical stability.

σ� 4-point contact between upper and lower casts: 2 at the front and 2 at the back providing vertical stability.

117. For complete denture, the appropriate occlusal scheme is:?

σ� Bilateral balance occlusion

σ� Group function

σ� Canine guidance

σ� Mutually protected occlusion

118. The minimum crown-to-root ratio of a tooth acceptable as an abutment for bridge:?

σ� 1:1

σ� 1:2

σ� 1:1.5

σ� 2:1

Suppose that a patient missing tooth 16 and 17. According to Ante’s law, can we use 15 and 18 as abutments for the fixed partial denture?

σ� No

σ� Yes

σ� Maybe

σ� Not relevant

What is Ante’s law?

σ� The combined pericemental area of the abutment teeth should be equal to or greater to the pericemental area than the teeth to be replaced.

σ� The combined peridontium area of the abutment teeth should be equal to or greater to the periodontium area than the teeth to be replaced.

σ� The combined alveolar bone area of the abutment teeth should be equal to or greater to the alveolar bone area than the teeth to be replaced.

σ� The combined soft tissue area of the abutment teeth should be equal to or greater to the soft tissue area than the teeth to be replaced

121. Compare to straight root, what root configuration of a tooth below that has better prognosis as an abutment for bridge:?

σ� Curve

σ� Short

σ� Slim

σ� Pointed

Vital tooth is a better abutment compared to non-vital tooth because:?

σ� Better proprioception

σ� Worse proprioception

σ� Less sensitive

σ� Prone to caries

123. Can we use tooth with grade 1 mobility as an abutment for bridge?

σ� Yes

σ� No

σ� Not relevant

σ� Any teeth with any degree of tooth mobility can be used

If a patient is missing teeth 13-23, what arch shape has better prognosis regarding to lever force?

σ� U-shape

σ� V-shape

σ� High palatal vault

σ� Doesn’t matter what shape it is

125. A three-unit bridge has ……. Times lower deflection than a 5-unit bridge. (choose one correct answer to fill in the gap)?

σ� 27

σ� 3

σ� 9

σ� 18

Can we use ovate pontic in case with severe vertical and horizontal ridge resorption?

σ� No

σ� Yes

σ� May be

σ� Not relevant

129. Apical extension of ovate pontic into the extracted tooth socket should be at least:

σ� 2.5 mm

σ� 1 mm

σ� 2 mm

σ� 4 mm

Veneering ceramic layer on a PFM restoration should not be thicker than:?

σ� 2 mm

σ� 1.5 mm

σ� 1 mm

σ� 3 mm

131. For retainer of a PFM bridge, the transition areas between metal and ceramic must be at least:?

σ� 2.5 mm away from any contact points in the occlusal area

σ� 1 mm away from any contact points in the occlusal area

σ� 1.5 mm away from any contact points in the occlusal area

σ� 2 mm away from any contact points in the occlusal area

For retainer of a PFM bridge, the transition areas between metal and ceramic must be at least:?

σ� 1 mm away from the proximal contact point.

σ� 1.5 mm away from the proximal contact point.

σ� 2 mm away from the proximal contact point.

σ� 2.5 mm away from the proximal contact point.

133. The following treatment is categorized in pre-prosthetic phase of the treatment plan, except:?

σ� Provisional restoration

σ� Full mouth scaling and polishing

σ� Root canal treatment

σ� Surgical removal of torus palatinus

Veneering ceramics for metal ceramic restoration contain a glassy matrix by volume of:?

σ� 75-85%

σ� 55-65%

σ� 65-75%

σ� 85-95%

135. Why do they need to increase the coefficient of thermal expansion (CTE) of veneering ceramics to match that of the casting alloy?

σ� To avoid tensile stress developing within the veneer when cooled.

σ� To avoid compressive stress developing within the veneer when cooled.

σ� To avoid flexural stress developing within the veneer when cooled.

σ� To avoid shear stress developing within the veneer when cooled.

How do porcelain chemically bond to its metal substructure?

σ� Metal oxides

σ� Metal ceramic

σ� Metal inhibited layer

σ� Base metal

137. Why do they add chromium into alloy for metal ceramic substructure?

σ� All of the above

σ� For its corrosion resistance property

σ� For chemical bonding with porcelain

σ� For formation of oxide layer

The following are base metals that are added into gold-based casting alloys to form oxide layer, except:?

σ� Magnesium

σ� Indium

σ� Tin

σ� Iron

Why do they need sandblasting of the base metal substructure before porcelain veneering?

σ� To reduce thick layer of metal oxides for optimum porcelain bonding

σ� To increase the thickness of metal oxides for optimum porcelain bonding

σ� To create smooth surface on the substructure for optimum porcelain bonding

σ� To provoke the failure in porcelain-metal interface.

140. The following are reinforced core ceramic systems, except:?

σ� Lithium disilicate glass ceramic

σ� Glass-infiltrated high strength ceramic core

σ� High density alumina core

σ� High density zirconia core

141. Y-TZP stands for:?

σ� Yttrium tetragonal zirconia polycrystals

σ� Yttrium tetrical zirconia polycrystals

σ� Ytterbium tetragonal zirconia polycrystals

σ� Yohimbine tetragonal zirconia polycrystals

142. The following are the disadvantages of reinforced ceramic core systems, except:?

σ� High opacity

σ� Cannot be etched

σ� Insufficient roughness for adequate bonding to resin

σ� Risk of chipping of veneering ceramic

143. What acid is used in etching of glass ceramic restoration before bonding to resin cement?

σ� Hydrofluoric acid

σ� Phosphoric acid

σ� Sulforic acid

σ� Hydrochloric acid

144. What acid is used in etching of enamel before bonding to resin cement?

σ� Phosphoric acid

σ� Hydrofluoric acid

σ� Sulforic acid

σ� Hydrochloric acid

145. What is the purpose of silane coupling agent in bonding with resin cement?

σ� To bond between etched glass ceramic surface and bonding agent

σ� To initiate the chemical reaction of resin cement

σ� To bond between bonding agent and resin cement layer

σ� To clean the etched glass ceramic intaglio surface

146. Choose only one correct sentence below about dental ceramics:?

σ� Alumina particles is used in sandblasting of glass ceramic

σ� Zirconia can be etched by hydrofluoric acid

σ� Pure feldspathic ceramic can be used as core ceramic

σ� Glass ceramic cannot be milled in a CAD/CAM milling machine

147. Choose the correct order of resin cement bonding onto glass ceramic: ?

σ� HF > H3PO4 > Silane > Bonding agent > resin cement

σ� HF > H3PO4 > Silane > resin cement > Bonding agent

σ� HF > H3PO4 > resin cement > Silane > Bonding agent

σ� H3PO4 > HF > Silane > resin cement > Bonding agent

148. In fiber-reinforced composite resin bridge, the fiber used is:?

σ� Polyethylene fiber

σ� Polyvinyl siloxane fiber

σ� Polymethylmethacrylic fiber

σ� Polyacryic fiber

The following restoration is called: ?

σ� Maryland bridge

σ� Cantilever bridge

σ� Telescopic bridge

σ� Fixed-movable bridge

151. What is a pontic of a fixed partial denture?

σ� The part of a FPD that replaces missing natural tooth/teeth

σ� The part of a FPD that covers abutment tooth/teeth

σ� The part of a FPD that connects retainer to connector

σ� The part of a FPD that supports the gum

152. The following are techniques in preserving alveolar ridge for FPD, except:?

σ� Orthodontic intrusion

σ� Ovate pontic

σ� Orthodontic extrusion

σ� Root submergence

153. The following are true about “alveolar preservation by ovate pontic”, except:?

σ� Delayed interim FPD with ovate pontic form.

σ� Atruamtic extraction

σ� 2.5 mm apical extension of the ovate pontic into the socket

σ� The seated interim restoration should cause slight blanching of interdental papilla

154. The following are the purpose of a surveyed crown, except:?

σ� When the tooth has a favorable occlusal relationship

σ� To restore a broken-down tooth to serve as a RPD abutment

σ� When a natural tooth crown cannot provide retention for clasps

σ� When it is necessary to splint adjacent teeth to provide additional stabilization

155. In Kennedy class III and IV, the proximal guiding planes should be:?

σ� Straight occlusally

σ� Curve occlusally

σ� Taper occlusally

σ� Divergent occlusally

156. In Kennedy class III and IV, the angle formed by the junction of the occlusal rest and guiding plane should be:?

σ� Rounded

σ� Sharp

σ� Curved

σ� Square

157. In Kennedy class III and IV, the proximal guiding planes should be:?

σ� Curved buccolingually

σ� Curved mesiodistally

σ� Straight mesiodistally

σ� Straight buccolingually

158. The following are true about occlusal rests in posterior area, except:?

σ� Should be round and convex

σ� Should be broad facially and lingually

σ� Should encompass 1/3 to 1/2 of occlusal width

σ� Should adequately clear the opposing dentition to allow at least 1 mm of metal rest thickness

159. When viewing occlusally, the occlusal rest seat of posterior tooth should have the form of:?

σ� Triangle

σ� Square

σ� Circle

σ� Oval

Year5/FixedProsthodontics/Seun Visal/100-159

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