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Year5/FixedProsthodontics/Seun Visal/51-100

51. ខាងក្រោមនេះជាបច្ចេកទេស mechanical-chemical methods of gingival displacement លើកលែងតែ:?

σ� Single-cord

σ� Double-cord

σ� Triple-cord

σ� Infusion method

52. The retraction cord ដែលគេជ្រើសរើសមកប្រើគួរតែមានទំហំ:?

σ� Of largest size possible that can be atraumatically placed in the sulcus.

σ� Of smallest possible that can be atraumatically placed in the sulcus.

σ� Of any size possible that can be atraumatically placed in the sulcus.

σ� Of medium size possible that can be atraumatically placed in the sulcus

53. Generic names ខាងក្រោមគឺជា hemostatic medicaments ប្រើសម្រាប់ធ្វើ gingival retraction in fixed prosthodontics លើកលែងតែ:?

σ� Aluminum sulfate,

σ� Aluminum chloride

σ� Epinephrine.

σ� Aluminum oxide

54. ហេតុអ្វីបានជាយើងចាំបាច់ត្រូវរង់ចាំរយៈពេល 8 to 10 minutes មុនពេលទាញ retraction cord ចេញហើយធ្វើការខាំពុម្ព?

σ� The cord needs time to expand, and the medicament needs time to create a metabolism in the soft tissue.

σ� The cord needs time to effect adequate lateral displacement, and the medicament needs time to create hemostasis and crevicular fluid control.

σ� The cord needs time to expand, and the medicament needs time to create a chemical reaction in the soft tissue.

σ� The cord needs time to expand, and the medicament needs time to create a bleeding phenomenon from the soft tissue.

55. ក្នុងបច្ចេកទេស double-cord gingival displacement, គេ:?

σ� Leave both cords in the sulcus and make the impression.

σ� Remove both cords and make the impression.

σ� Remove the first cord and make the impression with the second cord in place.

σ� Remove second cord and make the impression with the first cord in place.

56. ក្នុងបច្ចេកទេស single-cord gingival displacement, គេ:?

σ� Leave the cord in the sulcus and make the impression.

σ� Remove the cord and make the impression.

σ� Remove the first cord and make the impression with the second cord in place.

σ� Remove second cord and make the impression with the first cord in place.

57. ក្នុងបច្ចេកទេស double-cord gingival displacement, cord ដំបូងដើរតួនាទី:?

σ� Horizontal tissue displacement

σ� Vertical tissue displacement

σ� Horizontal and vertical tissue displacement

σ� Nothing

58. ក្នុងបច្ចេកទេស double-cord gingival displacement, cord ទីពីរដើរតួនាទី:?

σ� Horizontal tissue displacement

σ� Vertical tissue displacement

σ� Horizontal and vertical tissue displacement

σ� Nothing

59. Light-bodied polyvinyl siloxane impression material អាចកត់ត្រា surface detail of:?

σ� 15 µm

σ� 25 µm

σ� 50 µm

σ� 75 µm

60. Heavy-bodied lolyvinyl siloxane impression material អាចកត់ត្រា surface detail of:?

σ� 15 µm

σ� 25 µm

σ� 50 µm

σ� 75 µm

61. Gypsum die material អាចចម្លង surface detail of:?

σ� 15 µm

σ� 25 µm

σ� 50 µm

σ� 75 µm

62. ប្រយោគខាងក្រោមគឺជា functions of jaw relation record លើកលែងតែ:?

σ� They provide the stability or support that the casts of the remaining dentition lack.

σ� They reduce chair time for the delivery of the restoration.

σ� They reduce the likelihood of making restorations in hyperocclusion or without occlusal contacts.

σ� They increase the chance of perforation of restorations.

63. នៅពេលដែលមាន tripod of widely spaced contacts និង good intercuspation of the teeth, an interocclusal record គឺ:?

σ� Needed

σ� Not necessary

σ� Optional

σ� Done using an additional bite block

64. អ្នកជំងឺម្នាក់បានបាត់ធ្មេញលេខ 15,16,18 នៅ upper arch និង 48 នៅ lower arch. គាត់ចង់បាន bridgework ដើម្បីជំនួសធ្មេញដែលបានបាត់បង់. តើអ្នកគួរធ្វើ interocclusal record បន្ទាប់ពីធ្វើ final impression ឬទេ?

σ� Yes, we must.

σ� No, we must not.

σ� It’s optional.

σ� It depends on the dentist’s preference.

65. និយមន័យ provisional restorations:?

σ� a fixed or removable prosthesis, designed to enhance esthetics, stabilization or function for a limited period of time, after which it is to be replaced by a definitive prosthesis. Any dental prosthesis that is removable which replaces a part or an entire dentition and associated structures of the maxillae or mandible.

σ� A prosthesis which replaces missing teeth and is attached by means of cemented retainers to existing natural teeth, thus is not removable by the patient.

σ� a fixed or removable prosthesis, designed to enhance esthetics, stabilization or function for a limited period of time, after which it is to be replaced by a definitive prosthesis.

σ� a fixed intracoronal restoration; a dental restoration made outside of a tooth to correspond to the form of the prepared cavity, which is then luted into the tooth.

66. Provisional restorations ដើរតួនាទីជា periodontal surgical guide នៅក្នុង procedures ខាងក្រោមលើកលែងតែ:?

σ� Crown lengthening

σ� Root planning

σ� Ridge augmentation

σ� Pontic site development procedure

67. គ្រូពេទ្យអាចគ្រប់គ្រង thermal insult ទៅលើ pulp បានដោយ:?

σ� Minimizing the volume of the material.

σ� Fabricate the provisional restoration in extraorally

σ� Adequate water coolant until the material sets.

σ� All of the above answer.

68. Color instability of the provisional restoration អាចបណ្តាលមកពីកត្តាទាំងឡាយខាងក្រោម លើកលែងតែ:?

σ� The surface is too smooth.

σ� Incomplete polymerization of the material.

σ� Sorption of oral fluids.

σ� Surface reactivity.

69. វិធីទាំងឡាយខាងក្រោមត្រូវបានប្រើសម្រាប់ធ្វើ provisional restoration លើកលែងតែ:?

σ� Direct technique

σ� Indirect technique

σ� Indirect-direct technique

σ� Closed-tray technique

70. តើ prefabricated matrices អាចត្រូវបានប្រើដើម្បីធ្វើ a fixed partial denture provisional restorations បានដែរឬទេ?

σ� Yes

σ� No

σ� Sometimes

σ� I don’t know

71. តើប្រយោគណាមួយខាងក្រោមដែលរៀបរាប់បានត្រឹមត្រូវអំពី procedures of direct technique នៅក្នុងការធ្វើ provisional restorations?

σ� Provisional material is mixed, put in the matrix and seat directly in the mouth until setting occurs. Finishing and polishing are done and the provisional restoration is temporary cemented to prepared abutment.

σ� Irreversible hydrocolloid is used to take the impression from a final abutment preparation and the cast is poured. Provisional restoration is made on the stone die and then delivered to the patient.

σ� Primary cast are minimally prepared and a shell of provisional restoration is made on the stone die. The shell is tried-in, relined Finishing and polishing are done and the provisional restoration is and finishing and polishing then temporary cemented to prepared abutment.

σ� Flowable composite is spread on to the circumferential margin of the prepared abutment, light-cured and done.

72. តើប្រយោគណាមួយខាងក្រោមដែលរៀបរាប់បានត្រឹមត្រូវអំពី procedures of indirect technique នៅក្នុងការធ្វើ provisional restorations?

σ� Flowable composite is spread on to the circumferential margin of the prepared abutment, light-cured and done.

73. តើប្រយោគណាមួយខាងក្រោមដែលរៀបរាប់បានត្រឹមត្រូវអំពី procedures of indirect-direct technique នៅក្នុងការធ្វើ provisional restorations?

σ� Flowable composite is spread on to the circumferential margin of the prepared abutment, light-cured and done.

74. Resistance form:?

σ� the quality of a preparation shape that prevents anteroposterior movement of the casting about a fixed point.

σ� the quality of a preparation shape that prevents rotational movement of the casting about a fixed point.

σ� the quality of a preparation shape that prevents displaceable movement of the casting about a fixed point.

σ� the quality of a preparation shape that prevents rotational movement of the casting about a removable point.

75. Castings that failed by becoming uncemented and lacks resistance form are usually on:?

Premolars

Molars

Canines

Incisors

76. The restoration may dislodge when its margin passes:?

Point A

Point B

Point C

Point E

77. Retentive grooves be used in case of lack of: ?

σ� Retentive form

σ� Resistance form

σ� Short clinical crown

σ� Total occlusal convergence

78. Proximal grooves resist ?

σ� Faciolingual dislodgement force.

σ� Mesiodistal

σ� Occluocervical

σ� Sagittal force

79. Facial & lingual grooves resist ?

σ� Faciolingual dislodgement force

σ� Mesiodistal dislodgement force

σ� Occlusocervical dislodgement force

σ� Sagittal dislodgement force

80. Total occlusal convergence (TOC) is:?

σ� is the angle formed between two opposing prepared axial walls.

σ� is the angle formed between four opposing prepared axial walls.

σ� is the angle formed between two nearby prepared axial walls.

σ� is the angle formed between four nearby prepared axial walls.

81. Optimum TOC is:?

σ� 15° to 3o °

σ� 15° to 20°

σ� 10° to 20 °

σ� 6° to 10 °

82. Minimum occlusocervical dimension is:?

σ� 2mm for anterior teeth & premolar

σ� 3 mm for anterior teeth & premolar

σ� 4 mm for anterior teeth & premolar

σ� 1 mm for anterior teeth & premolar

83. Minimum occlusocervical dimension is:?

σ� 2mm for molar

σ� 3 mm for molar

σ� 4 mm for molar

σ� 1 mm for molar

84. Ratio of OC to FL should be:?

σ� ≥0.4 for all teeth

σ� ≥0.4 for anteior teeth

σ� ≥0.4 for posterior teeth

σ� ≥0.2 for all teeth

85. Advantages of supragingival finish line are below except: ?

σ� Can be easily finished

σ� Easier in OH maintenance

σ� Less soft tissue damage

σ� To mask discolored teeth

The correct order from a - f of the following diagram about finish lines are:?

σ� Knife edge, deep chamfer, Chamfer, shoulder, bevel shoulder, bevel

σ� Deep chamfer, chamfer, feather edge, shoulder, bevel, bevel shoulder

σ� Deep chamfer, shoulder, knife edge, feather edge, bevel, bevel shoulder

σ� Deep shoulder, chamfer, knife edge, shoulder, bevel shoulder, bevel.

87. The correct order from a – c of the following diagram about PFM crown margins are: ?

σ� Porcelain extended, porcelain, metal

σ� Porcelain extended, metal, porcelain

σ� Metal, porcelain extended, porcelain

σ� Metal, porcelain, porcelain extended.

88. Why round line angles must be achieved in tooth preparation?

σ� Ease of crown fabrication in lab

σ� Enhance restoration fit

σ� Increase strength of the restoration especially all ceramic

σ� All of the above

89. The definition of fixed dental prosthesis (FDP):?

σ� any dental prosthesis that is luted, screwed or mechanically attached or otherwise securely retained to natural teeth, tooth roots, and/or dental implant abutments that furnish the primary support for the dental prosthesis.

σ� any dental prosthesis that is removable which replaces the entire dentition and associated structures of the maxillae or mandible.

σ� any dental prosthesis that is removable which replaces a part of missing dentition and associated structures of the maxillae or mandible.

σ� any dental prosthesis that is removable which replaces a part or an entire dentition and associated structures of the maxillae or mandible.

90. Which sentence is wrong?

σ� Iatrogenic damage to adjacent teeth must be avoided.

σ� Damaged adjacent teeth have nothing to do with the properly fabricated restoration.

σ� Iatrogenic damage to adjacent teeth can be prevented by using metal matrice band or leaving lips or fin of enamel at the proximal areas.

σ� Damaged adjacent tooth structure must be restored prior to final impression of the restoration.

91. Which sentence is wrong?

σ� Soft tissue may heal itself without intervention, so care should be taken only on the abutment to be prepared.

σ� Properly retract the soft tissue when preparing the abutment

σ� Injury to the tongue may make the patient frustrated

σ� Mouth mirror, saliva ejector or aspirator tips can be used to retract the oral soft tissue

92. Which sentence is wrong?

σ� Carious dentin must be removed prior to tooth preparation

σ� Temporary crown must be carefully cemented on to the prepared abutment

σ� Plaque must be properly eliminated before tooth preparation

σ� Dentinal tubules have their own protecting mechanism, so prepared abutment can be left exposed in the oral environment

93. We can prevent pulpal damage during tooth preparation by:?

σ� Using blunt carbide or diamond burs, so reduction of small amount of the tooth structure at a time can reduce the heat generated by the instrument

σ� Using new and sharp burs with adequate water spray

σ� Using petroleum jelly to apply on the abutment during the preparation

σ� Intentionally root canal treated the tooth for abutment to prevent further problem of pulp necrosis due to extreme heat.

94. The size of the pulp may:?

σ� Decrease with age and more faciolingually than occlusocervically

σ� Increase with age and more faciolingually than occlusocervically

σ� Decrease with age and more occlusocervically than faciolingually

σ� Increase with age and more occlusocervically than faciolingually.

95. Indications of crown are:?

σ� To provide a contour to receive a RPD

Replacement of previous defective restorations

σ� Endodontically treated teeth

σ� All of the above

96. Which sentence is not contraindication of a crown?

σ� Patient with active caries

σ� Untreated periodontal disease

σ� Large pulp chamber (young patient)

σ� Extensive destruction from caries or trauma

97. Prostheses ខាងក្រោមគឺ purely tooth supported លើកលែងតែ:?

σ� Fixed partial denture (FPD)

σ� Cantilever FPD

σ� Root supported overdenture

σ� Maryland bridge

98. បើសិនជាមានការចាំបាច់ត្រូវធ្វើ long span FPD, the material for substructure គួរតែ:?

σ� Less bulky possible to accommodate the veneering porcelain

σ� Strength of the material is not a critical point

σ� Sufficiently bulky and made from high strength material

σ� Sufficiently bulky and can be made from material with various strength.

99. ពាក្យបច្ចេកទេសខាងក្រោមគឺជា components of a FPD លើកលែងតែ:?

σ� Connectors

σ� Retainers

σ� Indirect retainers

σ� Pontic

100. What is the difference between inlay and onlay?

σ� Inlay covers more than 1 cusp of the tooth

σ� Inlay is bigger

σ� Onlay covers more than 1 cusp

σ� Onlay covers all the cusps of a posterior tooth

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