Cons 2

1- When a resin bonding agent cures , it form ?

A. tissue tags
B. mineral tags
C. chemical lag
D. resin tags

2- Which of the following will not reduce polymerization shrinkage?

A. Soft stal polymerization

B. A stress breaking liner
C. Incremental addition of composite
D. High intensity light curing

3- Which of the following involve two setting reactions (namely acid - base reaction and
polymerization reaction)?!

A. Conventional glass lonomer cement

B. Reinforced glass ionomer restorative material
C. Compomer
D. Resin modified glass ionomer cement

4- Acid - etching is done for?!

A. 120 seconds
B. 30 seconds
C. 60 seconds
D. 90 seconds

5- Regarding the concept of minimal Intervention dentistry ?

A. Restorative and endodontic treatment solves the most prob - lems of oral health
B. Dental practitioners had integrated this concept worldwide into practice
C. is applicable only to cariology and periodontology
D. Is based on prevention and treatment using the least invasive of approaches .
6- Composites are retained by the phenomenon of ?

A. Atomic forces
B. True bonding
C. Cohesion
D. Mechanical Interlocking

7- The difference between minimal intervention dentistry and minimally invasive dentistry is ?

A. Minimally invasive dentistry terms that embrace surgical approaches

B. With a minimal intervention approach , the placement of restorations is a main phase of
the overall management
C. Minimally invasive dentistry is a component of the minimal intervention treatment
D. Minimal intervention is based entirely on treatment and control of oral disease .

8- Two step self - etching adhesive?!

A. Consider as 7th generation of bonding

B. Need to rinse off the acidic primer which contain etchant and primer
C. Eliminate the steps of rinsing and drying
D. More technique sensitive .

9- Which of the following factors in the Stephan's curve is related to the caries incidence and
sugar intake ?

A. Frequency of sugar intake

B. Physical form of sugar
C. Quantity of sugar intake
D. pH of plaque

10- The liquid system of glass ionomer restorative material is essentially?!

A- eugenol
A. B. Polyalkenoic acid
B. Polyacrylic acid
C. Phosphoric acid
11- G.V. Black concluded that the following areas on tooth surface are relatively non self -
cleanable areas?!

A. Pits and fissures

B. Crests of marginal ridges
C. Tips and cusps
D. All inclined planes of cusps and ridges

12- The main disadvantage of amalgam as restorative material in comparison with composite
is?!

A. not conservative
B. esthetic concern
C. mercury toxicity
D. brittness

13- What is the function of the copper in the amalgam?

A. To reduce the setting time

B. To reduce / eliminate the formation of the gamma 2 phase
C. To act as a scavenger
D. To prevent an exothermic reaction on setting

14- Compomer is ?

A. HYBRID composite
B. GIC AND COMPOSITE
C. Fluoridated GIC
D. Amalgam with high copper

15- Direct pulp capping is indicated when ?

A. Pain response to cold is long lasting

B. Mechanical exposures occur in clean and dry field
C. Remaining thickness of dentine is 0.5 mm
D. Excessive haemorrhage from the pulp during exposure
16- One bottle system of adhesive resins ?

A. Separate etching step is still required

B. Contains only primer
C. Separate etching step not required
D. 4th generation bonding agents

17- A patient of 46 years presented to your clinic , complaining of pain in their left side of teeth
when eating certain foods of varying temperature . You cannot see any caries or bone loss in
radiograph When putting the probe gently on the root surface area , the patient feels very
painful . What is the diagnosis ?

A. Dentine hypersensitivity
B. Reversible pulpitis
C. irreversible pulpitis
D. symptomatic apical periodontitis

18- The approximate time needed for produce a reperative dentin layer is ?

A. 1 to 2 week
B. 8 to 12 week
C. 4 to 8 week
D. 2 to 3 week

19- A dentin bonding agent has both hydrophilic and a hydrophoble end . The hydrophilic end
bonds to ?!

A. Resinous restorative material

B. Gollagen of dentin
C. Hydroxyapatite of hard tissues
D. Calcium of enamel

20- A 20 - year - old female presents for her initial dental examination and prophylaxis . During
the examination , you observe wear on the occlusal surfaces of many posterior and anterior
teeth . The wear on the posterior teeth are cup like and smooth , and on the anterior , it has
smoothed out the lingual anatomy of the incisors . This is most typical of which type of wear ?

A. Erosion
B. Attrition
C. Abrasion
D. Abfraction
21- Which of the following is true about atraumatic restoration ?

A. It involves caries removal completely

B. Consider as old technique not used nowadays
C. Using handiplece and cutting bur
D. Infected dentin is removed only .

22- Class II composite resin need to be ?

A. microfilled composite can be used

B. matrix is needed with no wedge
C. conventional preparation
D. proximal contact is main concern

23- The concept of c - factor in composite restoration ?!

A. For class 1 is less than in class 3

A. B Increase C - factor can decrease polymerization shrinkage
B. Relative ration between unponded surfaces to bonded surfaces area of composite resin
C. Class 4 has minimum ratio of C- factor .

24- In a caries free Individual , the saliva has ?!

A. Buffering capacity of saliva is Independent of caries incidence

B. low buffering capacity for acids
C. High buffering capacity for acids
D. medium buffering capacity for acids

25- Which of the following chemically bond to the tooth ?

A. Glass ionomer cement

B. zinc oxide cement
C. Composite resin
D. Dental sealants .

26- Which of the material of choice to be given in class V cavities ?

A. Silicate cement
B. Unfilled resin
C. Glass ionomer cement
D. Polycarboxylate cement
27- Using excessive number of pins in a restoration ?

A. Weakens the restoration

B. Has no significant effect on strength
C. Reinforces the amalgam
D. Reinforces the tooth

28- Which of the following adhesives is considered as component of universal bonding ?

A. 10 - MDP
A. UDMA
B. Bis - GMA
C. HEMA

29- Smear layer consists of ?!

A. Dentin chips
B. All of the above
C. Enamel debris
D. Microorganisms

30-Erosion lesions?!

A. affect the palatal surfaces of the incisor teeth in patients with bulimia
B. Are caused by excessive toothbrush force
C. result from the propagation of cracks through the cervical enamel
D. are shallow , bowl - shaped cervical lesions that affect the molar teeth

31- One of the main purposes of etching beveled enamel surface is to?!

A. To increase convenience
B. Produce macro undercul
C. To prevent caries
D. Increase surface energy
32- C factor mean ?

A. polymerization curing force

B. ratio of boded to unbonded tooth surfaces
C. Polymerization shrinkage antagonize force
D. ability of composite adherece to dental hard tissue .

33- Cavities beginning in the proximal surfaces of bicuspids and molars are ?

A. class I
B. class VI
C. class IV
D. class II

34- The most pronounced effect on the oral microflora of a reduction in rate of salivary flow is
a?

A. Shift towards more acidogenic microflora

B. Significant decrease in number of oral bacteria
C. shift towards more aerobic microflora
D. Significant increase in number of oral bacteria

35- Cervical restorations fall mostly due to ?

A. Marginal gingivitis
B. All of the above
C. Inadequate moisture control
D. Cuspal flexure

36- Diagnosis of dentine hypersensitivity what is true ?

A. should be based on detalled history taking and clinical examination

B. no need of excluding other conditions that mimic pain from dentine hypersensitivity
C. it similar to pain in symptomatic Irreversible pulpitis
D. sometimes requires radiographic evidence .
37- When using composites with an acid etching technique , the enamel margins should be ?

A. Obtuse angles
A. B Rounded
B. Butted
C. Acute angles

38- Characteristic feature of pain coming from Symptomatic reversible pulpitis is that ?

A. Subside with stimulus removal

B. Aggravated by cold / hot drinks
C. it interferes with sleep
D. It's localized pain

39- The value of C factor for class IV composite restoration is ?

A. 2.0
B. 0.25
A. 0.5
C. 1.0

40- If the configuration factor ( C factor ) increases for composites , polymerization shrinkage ?

A. Decreases
B. Increases
C. Decreases followed by increase
D. Increases followed by decrease

41- What is true regarding tooth abrasion ?

A. developmental disorder leads tooth wear

B. tooth surface loss due to extrinsic acid
C. external force cause tooth surface loss
D. tooth wear due to occlusal force .

42- Dentin etching is different from enamel etching as ?

A. detinal tubules affect bonding process positively

B. smear layer increase the bonding mechanism
C. Dentin is highly mineralized
D. Dentin contains a larger amount of water .
43- Why Calcium hydroxide is used in deep cavity ?

A. Simulate formation of 2nd dentine

B. Not irritant to the pulp
C. For thermal isolation
D. having good physical property .

44- What is true regarding tooth abfraction ?

A. developmental disorder leads tooth wear and tissue loss

B. tooth surface loss due to extrinsic acid
C. tooth wear due to occlusal force concentrated on cervical area
D. external force cause tooth surface loss .

45- The best material used for immediate capping of pulp exposure during caries excavation ?!

A. Glass lonomer Cement

B. Flowable composite
C. Zinc oxide eugenol
D. MTA

46- Dentin bonding agents usually contain?!

A. Only Hydrophobic component

B. Only Hydrophilic component
C. Hydrophobic and hydrophilic component
D. Lyophillic and lyophobic component

47- Shade selection for composite restoration in anterior teeth should be done ?

A. After applying bonding agent

B. Before prolonged drying
C. After prolonged drying
D. After end of etching
48- C factor is associated with ?

A. Curvature of root
B. Condensing force
C. Carving pattern for amalgam
D. Polymerization shrinkage

49- Composites used primarily for class I or class il restorations are termed as ... composites?!

A. Hybrid
B. Condensable
C. Flowable
D. Dual cure