Prosthodontic II, Dr.Soean Visal(101-159)
101. Below are fixed prostheses, except:?
Inlay/onlay
Fixed partial denture
Telescopic bridge
Resin bonded bridge
102. Below are dental ceramic, except:?
Zirconia
Alumina
Feldspathic
PMMA
103. The following are contra-indications for bridge, excepts:?
Patient with active caries
Patient with severe systemic disease
Untreated periodontal disease
Loss of 1 or 2 teeth
104. The following prostheses are all provide “complete cuspal coverage” for an abutment, except:?
Overlay
Crown
Fixed partial denture
Maryland bridge
105. These are types of fixed partial denture, except:?
Cantilever bridge
Fixed-movable bridge
Maryland bridge
Telescopic bridge
106. Radiographic examination could help identify all of the following, except:?
Bone support
Abnormality of the periodontium
Periapical lesion
Articular disc displacement
107. Damage to adjacent teeth in tooth preparation can be prevented by:?
Leave fin of enamel
Use metal matrix band
Use mouth mirror to isolate the patient’s soft tissue for clearer access
All of the above
108. For tooth with severe gum recession, the most appropriate finish line to avoid pulpal exposure is:?
Deep chamfer
Shoulder
Bevel shoulder
Feather edge
109. What finish line form requires the least tooth reduction:?
Bevel
Shoulder
Knife edge
Chamfer
110. For porcelain veneers, for maximum adaptation, the surface of the abutments need to be:?
Smooth
Rough
Porous
Any surface roughness
111. What articulator needs an arbitrary facebow?
Kinematic articulator
Semi-adjustable
Fully-adjustable
Hinge articulator
112. Which articulator among below produce the most accurate mandibular movement?
Hinge
Average value
Semi-adjustable
Fully-adjustable
113. For average value articulator, the incisal guidance is set to: ?
10 degrees
15 degrees
20 degrees
30 degrees
114. Semi-adjustable articulator can be used as following, except:?
Changes in vertical dimension
Change in condylar guidance
Set incisal guidance angle
Record Benett movement
115. The difference between Arcon and Non-arcon semi-adjustable articulators is:?
In arcon: condyle is in lower member
In arcon: condyle is in upper member
In non-arcon: condyle is in lower member
They are the same
116. What is tripod of vertical support in interocclusal record?
3-point contact between upper and lower casts: 1 at the front and 2 at the back providing vertical stability.
4-point contact between upper and lower casts: 1 at the front and 2 at the back providing vertical stability.
3-point contact between upper and lower casts: 2 at the front and 1 at the back providing vertical stability.
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:?
Group function
Canine guidance
Bilateral balance occlusion
Mutually protected occlusion
118. The minimum crown-to-root ratio of a tooth acceptable as an abutment for bridge:?
1:1
1:2
1:1.5
2:1
119. 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?
Yes
No
Maybe
Not relevant
120. What is Ante’s law?
The combined pericemental area of the abutment teeth should be equal to or greater to the pericemental area than the teeth to be replaced.
The combined peridontium area of the abutment teeth should be equal to or greater to the periodontium area than the teeth to be replaced.
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.
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:?
Curve
Short
Slim
Pointed
122. Vital tooth is a better abutment compared to non-vital tooth because:?
Better proprioception
Worse proprioception
Less sensitive
Prone to caries
123. Can we use tooth with grade 1 mobility as an abutment for bridge?
Yes
No
Not relevant
Any teeth with any degree of tooth mobility can be used
124. If a patient is missing teeth 13-23, what arch shape has better prognosis regarding to lever force?
U-shape
V-shape
High palatal vault
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)?
3
9
18
27
126. Minimum dimension for connector of a PFM bridge:?
1.5x1.5 mm
2x2 mm
2.5x2.5 mm
3x3 mm
127. What pontic is the most difficult to clean?
Sanitary
Ridge lap
Modified ridge lap
Ovate
128. Can we use ovate pontic in case with severe vertical and horizontal ridge resorption?
Yes
No
May be
Not relevant
129. Apical extension of ovate pontic into the extracted tooth socket should be at least:
1 mm
2 mm
2.5 mm
4 mm
130. Veneering ceramic layer on a PFM restoration should not be thicker than:?
1 mm
1.5 mm
2 mm
3 mm
131. For retainer of a PFM bridge, the transition areas between metal and ceramic must be at least:?
1 mm away from any contact points in the occlusal area
1.5 mm away from any contact points in the occlusal area
2 mm away from any contact points in the occlusal area
2.5 mm away from any contact points in the occlusal area
132. For retainer of a PFM bridge, the transition areas between metal and ceramic must be at least:?
1 mm away from the proximal contact point.
1.5 mm away from the proximal contact point.
2 mm away from the proximal contact point.
2.5 mm away from the proximal contact point.
133. The following treatment is categorized in pre-prosthetic phase of the treatment plan, except:?
Full mouth scaling and polishing
Provisional restoration
Root canal treatment
Surgical removal of torus palatinus
134. Veneering ceramics for metal ceramic restoration contain a glassy matrix by volume of:?
55-65%
65-75%
75-85%
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?
To avoid compressive stress developing within the veneer when cooled.
To avoid flexural stress developing within the veneer when cooled.
To avoid tensile stress developing within the veneer when cooled.
To avoid shear stress developing within the veneer when cooled.
136. How do porcelain chemically bond to its metal substructure?
Metal ceramic
Metal inhibited layer
Metal oxides
Base metal
137. Why do they add chromium into alloy for metal ceramic substructure?
For its corrosion resistance property
For chemical bonding with porcelain
For formation of oxide layer
All of the above
138. The following are base metals that are added into gold-based casting alloys to form oxide layer, except:?
Iron
Tin
Indium
Magnesium
139. Why do they need sandblasting of the base metal substructure before porcelain veneering?
To reduce thick layer of metal oxides for optimum porcelain bonding
To increase the thickness of metal oxides for optimum porcelain bonding
To create smooth surface on the substructure for optimum porcelain bonding
To provoke the failure in porcelain-metal interface.
140. The following are reinforced core ceramic systems, except:?
Glass-infiltrated high strength ceramic core
High density alumina core
Lithium disilicate glass ceramic
High density zirconia core
141. Y-TZP stands for:?
Yttrium tetragonal zirconia polycrystals
Yttrium tetrical zirconia polycrystals
Ytterbium tetragonal zirconia polycrystals
Yohimbine tetragonal zirconia polycrystals
142. The following are the disadvantages of reinforced ceramic core systems, except:?
Cannot be etched
Insufficient roughness for adequate bonding to resin
Risk of chipping of veneering ceramic
High opacity
143. What acid is used in etching of glass ceramic restoration before bonding to resin cement?
Phosphoric acid
Hydrofluoric acid
Sulforic acid
Hydrochloric acid
144. What acid is used in etching of enamel before bonding to resin cement?
Phosphoric acid
Hydrofluoric acid
Sulforic acid
Hydrochloric acid
145. What is the purpose of silane coupling agent in bonding with resin cement?
To initiate the chemical reaction of resin cement
To bond between etched glass ceramic surface and bonding agent
To bond between bonding agent and resin cement layer
To clean the etched glass ceramic intaglio surface
146. Choose only one correct sentence below about dental ceramics:?
Zirconia can be etched by hydrofluoric acid
Pure feldspathic ceramic can be used as core ceramic
Alumina particles is used in sandblasting of glass ceramic
Glass ceramic cannot be milled in a CAD/CAM milling machine
147. Choose the correct order of resin cement bonding onto glass ceramic: ?
HF > H3PO4 > Silane > resin cement > Bonding agent
HF > H3PO4 > resin cement > Silane > Bonding agent
HF > H3PO4 > Silane > Bonding agent > resin cement
H3PO4 > HF > Silane > resin cement > Bonding agent
148. In fiber-reinforced composite resin bridge, the fiber used is:?
Polyacryic fiber
Polymethylmethacrylic fiber
Polyvinyl siloxane fiber
Polyethylene fiber
149. The following restoration is called: ?
Cantilever bridge
Maryland bridge
Telescopic bridge
Fixed-movable bridge
150. How many grades are there in Miller index of tooth mobility?
2
3
4
5
151. What is a pontic of a fixed partial denture?
The part of a FPD that replaces missing natural tooth/teeth
The part of a FPD that covers abutment tooth/teeth
The part of a FPD that connects retainer to connector
The part of a FPD that supports the gum
152. The following are techniques in preserving alveolar ridge for FPD, except:?
Ovate pontic
Orthodontic extrusion
Orthodontic intrusion
Root submergence
153. The following are true about “alveolar preservation by ovate pontic”, except:?
Atruamtic extraction
2.5 mm apical extension of the ovate pontic into the socket
The seated interim restoration should cause slight blanching of interdental papilla
Delayed interim FPD with ovate pontic form.
154. The following are the purpose of a surveyed crown, except:?
To restore a broken-down tooth to serve as a RPD abutment
When a natural tooth crown cannot provide retention for clasps
When it is necessary to splint adjacent teeth to provide additional stabilization
When the tooth has a favorable occlusal relationship
155. In Kennedy class III and IV, the proximal guiding planes should be:?
Straight occlusally
Curve occlusally
Taper occlusally
Divergent occlusally
156. In Kennedy class III and IV, the angle formed by the junction of the occlusal rest and guiding plane should be:?
Rounded
Sharp
Curved
Square
157. In Kennedy class III and IV, the proximal guiding planes should be:?
Curved mesiodistally
Curved buccolingually
Straight mesiodistally
Straight buccolingually
158. The following are true about occlusal rests in posterior area, except:?
Should be broad facially and lingually
Should encompass 1/3 to 1/2 of occlusal width
Should be round and convex
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:?
Square
Circle
Triangle
Oval
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