- •32. A persistent oroantral fistula for a 12 weeks period following the extraction of a maxillary first permanent molar is best treated by,
- •33. The most significant finding in clinical evaluation of parotid mass may be accompanying,
- •34. As far as surgical removal of wisdom teeth is concerned which of the following is true?**
- •41. Benign migratory glossitis or Geographic Tongue, manifests itself in the oral cavity as,
- •54. The tonsillar lymph node is situated at the level of,
- •55. Exposure of the patient to ionising radiation when taking a radiograph is reduced by all the following except :
- •85. The pulp horn most likely to be exposed in the preparation of large cavity in permanent molar tooth is,
- •86. The main factor controlling a decision to increase the occlusal height of teeth for extensive oral reconstruction is whether,
- •1070. Etching a hybrid glass ionomer-composite
1070. Etching a hybrid glass ionomer-composite
a. is necessary for composite resin bonding b. is not necessary for composite resin bonding c. is necessary for adding a glass ionomer cement for repair d. is not necessary for adding a glass ionomer cement for repair e. a 3-5 second etch with 10% phosphoric acid is recommended 1071. In comparing conventional glass ionomer restorative materials with light-curing glass ionomer (resin ionomer) materials, which of the following physical properties of the light cured materials are improved? 1. bond strength to composite 2. thermal coefficient of expansion 3. solubility 4. compressive strength a. 1,2,3 b. 1,2,4 c. 1,3,4 d. 2,3,4 e. all of the above 1072. The principal reasons for placing a gingival interproximal wedge in conjunction with a matrix for amalgam condensation are to: 1. separate the teeth slightly 2. keep the band tight at the gingival margin 3. contribute to the interproximal contact of the restoration 4. retract the gingival tissue a. 1,2,3 b. 1,2,4 c. 2,3,4 d. 1,3,4 e. all of the above 1073. In the hand instrument formula, 13-80-8-14, the number 14 represents the a. width of the blade b. blade length c. blade angle d. primary cutting edge angle e. none of the above. 1074. Which of the following is NOT a characteristic of glass ionomer cements? a. strong in compression but weaker in tension b. the matrix is formed during the initial set of the cement c. sets via an ion exchange reaction that continues for at least 24 hours d. suitable for use as a core build up material in anterior teeth
e. all of the above are correct 1075. Which statements about the dentinal smear layer are TRUE? 1. must be removed prior to the application of bonding agents 2. can be produced by high speed, low speed, or hand instrumentation 3. removal has little effect on increasing dentin permeability 4. effectively removed by sequential treatment of sodium hypochlorite and EDTA 5. may contain viable microorganisms a. 1, 2, 5 b. 2, 3, 4 c. 2, 4, 5 d. 1, 3, 5 e. all of the above 1076. When considering visible light cured composites, which of the following statements is incorrect? A. An air-inhibited layer is present superficially on the composite. B. The wavelength of the light which affects the initiator is in the range of 450 to
500 nanometers. C. All other things equal. The light generally penetrates deeper into a small-particle
composite than it does into a microfilled composite. D. B and C E. All are true 1077. The clinical advantage of porcelain laminate veneers over composite resin veneers is: A. Color stability and resistance to abrasion B. Availability of self-curing or light activated placement C. Minimal over-contouring of the treated teeth D. May be used in edge to edge occlusion or Class III relationships.
1078. The ductility of metal is usually expressed in terms of the: A. Yield strength B. Percent elongation C. Modulus of elasticity D. Ultimate tensile strength E. Young’s modulus
1079. On Xray hypoplasia of enamel is
A. radioluscent
B. radiopaque
C. can’t detect
D. sometimes radiopaque, sometimes radioluscent
1080. Which of the following statements concerning the use of radiography for children is incorrect?
A. techniques are the same as those used in adults
B. easier because of the smallness of the child’s mouth
C. made difficult by the child’s nervousness and his tendency to gag
D. helpful in overcoming some of these difficulties are consideratehandling of the
child, the use of small size film and the use of ultra speed
1081. The lateral cephalometric radiograph is used to:
A. study the growth of the face in (comparison) relation with the base of the skull
B. treat the jaw with discrepancy and malocclusions
1082. Why do you take x-rays at different horizontal angulations
A. To find more canals
B. To find more foramina.
C. To find vertical fractures
1083. Horizontal angulations of x-ray tube towards the mesial:
A. Buccal roots move distally
Titanium is used in dentistry
In a very pure form in implants
In an alloy with aluminium in casting for crowns and bridges
In an alloy with nickel in orthodontic wires
A and B
A, B and C
A 50 years-old patient presents with pain from time to time on light cervical abrasions. What is your first management to help patient in preventing pain in the future?
Change diatary habits
Change brushing habits
GIC fillings