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September 2004 Paper 1MCQs

1. In the preparation of Premolar class I cavity what is the best way of gettingretention,

A. Slightly done undercut of the mesial and distal wallsB. Slightly done undercut of the buccal and lingual wallsC. The convergence of the cavity walls

2. In respect to Class VA. it occurs on the buccal groove (fissure)B. it occurs on the lingual groove (fissure)C. it is a result of bad oral hygiene

3. After the placement of a class I amalgam the patient comes back to youcomplaining of pain on masticating and biting; what is the first thing youwouldlook at,

A. Occlusal heightB. Contacts areas

4. Child comes to your clinic with a fractured incisor 3 mm super-gingival, howwould you treat the case,

A. Formocretasol pulpotomy

B. Calcium hydroxide pulpotomyC. PulpectomyD. Direct cappingE. Indirect capping

5. What is Antes Law about,A. The relation between the span of the bridge and the poeticsB. The periodontal area of the abutment teethC. The relation between the length of the root and the abutment.

6. What is the best way to cement Maryland bridge,A. GICB. ResinC. High compression restorative resin

D. Zinc Phosphate cementE. Oxide Zinc and eugenol

7. The ideal length of core in the fabrication of crown and core of endodonticallytreated tooth is,

A. 1.5 of crown lengthB. The length of the crownC. 2/3 tooth/root lengthD. root length

8. If aesthetic is not a concern what is the first thing to do to treat soreness underdentures,

A. Take the denture off for a weekB. Rinse the denture in nystatinC. Apply tissue conditioner

9. While you finishing a class I cavity, the enamel is sound but you noticed in thedentine and on the Dento-enamel junction a brown line, what is your response,

A. You leave it and complete the final restorationB. You extend you preparation and clean itC. You apply a cover of varnish

10. Dental caries of the proximal surfaces are usually start at,A. Somewhere between the ridge and the contact areaB. Just gingival to contact areasC. Just about the gingival margin

11. What is the property of high copper amalgam

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A. Reduced physical creepB. Higher retention

12. In regards to colours what is Chroma stands for,A. Degree of saturation of hueB. BrightnessC. ValueD. Contrast

13. Frankfort plane extends from,A. horizontally from Sella to nasionB. Sagittal from .C. Horizontally from point on superior aspect of external auditory meatus to

orbitale

14. Which of the following local anaesthetic is indicated in case of the need tolongacting one after a surgical operation,

A. LidocaineB. MepivacaineC. Bupivacaine (Marcaine)

15. In respect to Lidocaine 2% with 1:100000 vasoconstrictor,A. The toxic threshold is 22mlB. 8.8 ml is the maximum you can give in one session

16. Which one of this restorative method will be LEAST compromised by a core,A. AmalgamB. CompositeC. GICD. Cast gold

17. In preparing a very small proximal amalgam cavity on a molar tooth whatwouldconsider,

A. Extend the cavity to the gingival marginB. Extend the cavity beyond the contacts areasC. Achieve at least 2mm in dentineD. Extend cavity just beyond dento enamel junction

18. What is true about partial dentures,

A. They cause an immediate changes in the oral plaque behaviourB. Night wearing of dentures reduces plaque accumulationC. Relieving the gingival area reduces the gingival enlargement.

19. The biting load of denture base to tissues compared to teeth are,A. Ten times moreB. Ten times lessC. Equal

20. Compound is,A. Very accurate compression materialB. Thermoplastic material

21. the different between normal stone and the dye stone is,

A. In the particles sizeB. The amount of water

22. What sort of reaction happens in the GIC restorations,A. Acid Base reaction

23. A patient comes to you with medium pain of tooth filled with Composite resinas a result of cold or hot drinks, what your initial management will be,

A. Remove the restorative material and start an Endontic treatmentB. Remove the restorative material and place a sedative temporary materialC. Place a coat of bonding material on the old composite

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24. Throbbing pain increases with heat and cold stimuli, the MOST probablediagnosis is,

A. CystB. Occlusal traumaC. Advanced pulpitis

25. In making your custom trays which of the following is true,A. A uniform thickness is requiredB. Perforation is betterC. Only adhesive is better than perforation

26. The beam that leaves the target is called,A. The primary X-rayB. The electronsC. The secondary raysD. X-rays photons

27. The most common cause of caries in children is,A. Soft dietB. High intake of carbohydrateC. Poor oral hygiene

28. The best storage media for avulsed tooth is,A. SalineB. MilkC. WaterD. Saliva

29. An occlusal approaching clasp TIP,A. Should occupy a predetermined undercutB. Contact the tooth under the survey lineC. Rigid

30. In the construction of partial denture the surveyor is not used to,A. Contour the wax as part of the fabrication of the working castB. Locate the guide planesC. Determine the location of indirect retainersD. Identify any undesirable undercuts

31. The advantage of the silicone in soft relining material over .. rubber is,A. Retains high flowB. Prevents the colonization of Candida albicansC. Resilient in long runD. Better bond strength

32. The main purpose of finishing the enamel walls is,A. Remove loose enamel rodsB. Provide a better surface for the adoption of restorative material

33. A female patient comes to you complaining of persistent pain in heavilyrestored central incisor; you suspect pulpitis and you have been told that sheisin transit leaving by plane next day. Your treatment will be,

A. Remove filling and place a sedative dressings

B. Pulp extirpation and obturate with Ledermix dressingsC. Prescribe analgesics and systemic antibiotic

34. which of the following is true regarding TMJ dysfunction,A. It is always due to arthritis, should be treated with NSAIDS before attempting surgeryB. Raising bite increases the space in the joint and should be attempted before

surgeryC. It is mostly due to the medial movement of the condylar head over the glenoid fossa

35. the location of Class V is in,A. The buccal pit /fissure/B. The occlusal surfaceC. The cervical third

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36. Occlusal cavity with extension of the buccal fissure is classified as,A. Class IIB. Class IIIC. Class I

37. Which of the following does not affect the elasticity of retentive clasp?A. Length of the armB. The cross section shapeC. The material usedD. The undercut area

38. Following calcium hydroxide pulpotomy, the dentist would expect dentinebridge to form at,

A. The exact level of amputationB. Level some where below the amputationC. Half way between amputation and apexD. At the apical region of the tooth

39. In the construction of a full veneer gold crown, future recession of gingivaltissue can be prevented or at least minimised by,

A. Extension of the crown 1 mm under the gingival creviceB. Reproduction of normal tooth incline in the gingival one third of the crownC. Slight over contouring of the tooth in the gingival one fifth of the crownD. Slight under contouring of the tooth in the gingival one fifth of the crown

40. A partial denture that seats on the master cast but fails to seat correctly in themouth is a result of,

A. Contraction of the metal framework during castingB. Insufficient expansion of the investment materialC. Distortion of impressionD. Failure to block out unwanted undercuts

41. Which of the following muscles may affect the borders of mandibularcompletedenture?

A. MentalisB. Lateral pterygoidC. Orbicularis orisD. Levator oris

E. Temporalis

42. Jaw relations for edentulous patient have been established. The maxillary casthas been mounted on the articulator without face-bow and you decided toincrease the occlusal vertical dimension by 4 mm. this will necessitate,

A. Opening the articulator 4 mmB. A new centric relation recordC. Changes in the condylar guide settingsD. Increase in the vertical dimension

43. What is correct in regards to high copper amalgam,A. Reacts and strengthens the amalgam by its dispersion propertiesB. Reacts to form copper-tin phase thereby eliminating the tin-mercury phaseC. Reacts to form copper-silver phase thereby eliminating the silver mercury phase

D. Reacts and strengthens the amalgam by its grain diffusion

44. What is the best way to get optimum adoption of ceramic to metal,A. Slow firingB. High compression

45. What is the main purpose of using corticosteroids in pulpal obturationmaterial?

A. For their antibiotic actionB. For their antiinflammatory actionC. To relief pulp pressure

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46. Which of the following statements is incorrect regarding Smokers Keratosis?A. Typically affects the hard palateB. Minor mucous glands are swollen with red orificesC. There is a little regression if smoking is stopped

September 2004 Paper 2MCQs

1. The blood supply to the denture bearing areas of the maxillaA. Superior Maxillary arteryB. Grand/greater palatine artery

2. What could be MOST cariogenic,A. Consuming a lot of carbohydrate with mealsB. Consuming a lot of elective sweets during mealsC. Excessive consumption of sugar soft drinks all dayD. Consumption of elective sweets between meals

3. 13 years old boy comes to you with excessive hyperplasia of the gingiva as aresult of Phenytoin what is your management,

A. Stop the medicationB. Force a strict oral hygiene and surgical removal of excess gingival tissuesC. Debridement and conservative approach

4. During swallowing, a) suprahyoid muscles relax b) masseter contract c)tonguetouches the palate

A. a and bB. a and cC. b and cD. none of the aboveE. all of the above

5. White man 56 years old comes to you with a brown spot on his gingiva andanother one on his oral mucosa, when taking the history he mentioned aweightand memory lost. He as well complains of headaches. What is yourmostprobable diagnosis,

A. Addisons diseaseB. Hyperthyroidism

6. While removing the second primary molar of 9 years old child, the apical ofthe root fracture and stay in the socket,

A. You will just leave it and observe itB. You take surgically by a lingual flapC. You try to take out by using a root apex elevatorD. You use a fine end forceps to take it out

7. Subgingival plaque changes from,A. gram positive to gram negativeB. gram negative to gram positive

8. What is the most important factor to reduces dental irradiation,A. Speed of filmB. CollimationC. FiltrationD. Cone shape and length

9. With view to Nitrous Oxide what is the major pharmacological problem?A. Contraindicated in pregnancyB. Contra indicated in cardiac dysrhythmias

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C. Diffusion hypoxia at the end of the case due to slow solubility of the agent inblood

10. Which of the following is an expansile lesion of the oral mucosa,A. KeratocyteB. Radicular cystC. Cementoma

11. the initial therapy in HIV patient is,A. Debridement and antimicrobial mouth rinsesB. Root planing and surgical approach

12. The concentration of Fluoride in the topical NaFA. 2%B. 5%C. 8%D. 10%

13. Which of the following most probable does not exist in the kids acutegingivitis,A. SpirochetesB. StreptococcusC. Staphylococcus

14. Which of the following is true about warfarin,A. INR of 3 is enough to start any extraction

15. What is not true about tobacco smoking,A. Redox potential is reduced resulting in anaerobic bacteriaB. It is immuno-suppressiveC. It is adrenergic

16. patient in your dental chair shows chest pain, weak pulse and dysponea, whatis your initial management,

A. Give a nitro-glycerine tablet and keep the patient up seated /This answers is forany of the angina symptoms

B. Put the patient in supine positionC. Do nothing and wait until the symptoms go

17. What are two teeth connected at the cementum called,

A. ConcrescenceB. DilacerationC. GeminationD. Fusion

18. Developer contaminated with other chemical and was not mixed properly.Whatis the effect on the X-ray film?

A. Too dark filmB. Light filmC. Foggy

19. Which part of the cranium is considered as the most stable area,A. Frankfort plane

B. Occlusal planeC. Anterior cranial planeD. Anterior nasal to gnathion.

20. the difficulty of placing matrices on deciduous dentition is a result of,A. The small mouth of kids which result in problem keeping the matrices in their mouthsB. The occlusal convergence of the deciduous teeth

21. What would you expect to see a year after Auto- transplantation of tooth in apreparedsocket,

A. New well formed periodontal ligamentB. Degree of external resorption and fibrous tissuesC. New well formatted lamina dura

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22. Which muscle will keep the fractured segment of the jaw I can not

remember this questionA. Lateral pterygoidB. Medial pterygoidC. MasseterD. TemporalisE. Mylohyoid

23. What is INR used for,A. 3 or more is the target prothrombin time to start a safe extraction

24. Branchial Cleft cyst is located ,A. Medial to the neckB. On anterior border of the Sternocleidomastoid muscleC. Shows when swallowing

25. the most common way of oral carcinomas to other tissues is/areA. LymphaticB. Invasion and bloodC. Lymphatic and invasionD. Blood and lymphatic

26. What is true about smokers,A. Causes immunosuppressionB. Increase redox potential of smokers fibrous growth of anaerobic organismsC. Defects neutrophil function and characteristicsD. Can produce smokers palate but rarely metaplasia

27. The main purpose of periodontal treatment is,A. Elimination of plaque and calculusB. Elimination of periodontal pocketsC. Reformation of all the periodontal ligamentsD. The elimination of all occlusal trauma

28. What is the approximate unstimulated salivary flow rate,A. 2 ml/minB. 0.2 ml/minC. 0.02 ml/min

D. 20 ml/min

29. Why is it difficult to use matrices on deciduous teeth,A. It hurts the kids parentsB. The small mouth opening of kids in that age range makes it difficult to keep matrices

in mouth.C. The occlusal concavity of deciduous teeth

30. The thermal and electric pulp tests will,A. Give an accurate indications of the pulp statusB. The patients response will be either pain or no painC. The patient can differentiate between cold or hot stimuli

31. Immediately after the extraction of lower molar the patient complains of postoperation bleeding and pain, how would manage this,

A. Prescribe analgesics and ask the patient to follow a strict oral hygieneB. Administer 5% Marcaine Local Anastatic, prescribe analgesics and pack the socket

with alvogylC. Administer 5% Marcaine Local Anastatic, suture the socket and prescribe

analgesicsD. Suture and give pressure packs

32. Gracey curette is characterized by,A. The blade and the shank form 90 angleB. Can be used on both sidesC. Can be used on any tooth surface

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D. It is specific for each surface of the tooth

33. The removable partial denture requires relining what is would be the mostappropriate action,

A. take a new impression by asking the patient to occlude on itB. Provide equal space (may be it was thickness) between denture and gingival tissues.C. Make sure the framework and retainers are seated in place before taking

impression

34. Why do we use Corticosteroid material in pulp obturation,A. To prevent the inflammatory processB. As an AntibioticC. To minimize pressure on the periapical tissues

35. As a result of wrong use of tooth brush the patient MOST probable complaint will be when,

A. Spontaneous pain or discomfortB. Occasional pain during brushing of the teethC. Occasional pain during consumption of sweets

36. In regards to dentine strength, which is the right sequence,A. Affected dentine> Sound dentine> Infected dentineB. Sound dentine> Affected dentine> Infected dentine

37. Symptoms free patient comes to you after four weeks of an endodontictreatment and you findon radiograph the canal is over filled with what it seemsto be a cone of Gutta Percha 1mm beyond the apex with a radiolucent smallarea.What is your initial management?,

A. Start apiectomy through a flap and surgeryB. Obturate the root canalC. Ask for a recall and observe in three months timeD. Seal the pulp chamber and keep it under observation

38. After obturation and on X-ray you notice the obturation materials are 1mmbeyond apex. What is your first management?

A. Refill the canalB. Pull the GP cone about 1mm out and take a new X-rayC. Leave it as it

39. 2.21mg NaF contains,A. 1mg fluorideB. 2 mgC. 0.5 mg

40. The requirement for root and crown length is,A. 2:3B. 1:1C. 1:2

41. Stiffness of material are measured by,A. Proportional unitB. Modules of elasticityC. Stress/ strain

42. What is the purpose of making a record of protrusive relation and whatfunctiondoes it serve after it is made?

A. To register the condylar path and to adjust the inclination of the incisal guidance.B. To aid in determining the freeway space and to adjust the inclination of the incisal

guidance.C. To register the condylar path and to adjust the condylar guides of the

articulator so that they are equivalent to the condylar paths of the patient.

This is the answer of the American board, to aid in establishing the occlusal verticaldimension and to adjust the condylar guides of the articulator so that they areequivalent tothe condylar paths of the patient

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43. Four years kid shows at your clinic with open bite as a result of thumbsucking,

you notice a delayed speech ability what would be your firstmanagement,A. Refer to a speech therapistB. Apply a removable habit inhibitor dentureC. Apply a removable habit inhibitor denture and educate the parents about it so the kid

will not be taking it off so often

44. Two central incisors on a radiograph are showing with what looks like eye dropradiolucency. You decided to start endodontic treatment on these teeth but youtried toopen access to the root canal you find clearly closed orifices with whatlook like secondary dentine. What is yourinitial management?

A. Leave as it and start a permanent restoration.B. Start systemic antibioticC. Try to ream and file canals

45. A patient with no positive history came along for scaling. The moment youpickup the scaler you punch your finger, what should you do?

A. Complete the procedure as nothing has happenedB. Check patients blood for Hepatitis B antibody HBsAbC. Check patients blood for Hepatitis B antigen HBsAgD. Check dentists blood for Hepatitis B antibody HBsAb and HIV antigen HIVAgE. Check dentists blood for Hepatitis B antigen HBsAg and HIV antibody HIVAbF. Dentist should go and take a HBsAb vaccine

46. when probing for periodontal disease the tip of the probe will be,A. At the coronal end of junctional epitheliumB. At the top of the gingival calculus

47. After the initial development stage and in the absence of pathology, a thesizeof the pulp chamber has been reduced by,

A. Deposition of primary dentineB. Deposition of secondary dentineC. Reparative dentineD. Pulp fibrosisE. Deposition of reparative dentine

48. The most desirable outcome of endodontic treatment is,A. The healing of the alveolar bone

B. The deposition of cementum at the apexC. Formation of fibrous capsule around the apex

49. What is NOT related to the normal aging process?A. Progressive bone lossB. Reduced elasticity of musclesC. Decreased elasticity of the skinD. Lower pain threshold

50. As far as localised alveolar osteitis is concerned; which one of the following istrue?

A. The incidence in the mandible and maxilla is similarB. The prophylactic prescription of antibiotics prior to extraction reduces the incidence.C. Excessive fibrinolysis is the likely aetiology

D. Purulent exudate must be seen for a diagnosis and irrigation is mandatoryE. Zn oxide eugenol and alvogyl dressing promote a rapid bone growth

51. The most accurate finding of pulpal pathologyA. Radiolucency on the apical regionB. Pain on hot or cold drinksC. The absence of response to pulp testing

52. for dental caries to progress in dentine,the dentine must contain soluble collagenA. enamel must contain glycoproteinsB. diet must contain simple carbohydrateC. diet must contain polysaccharides

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D. pulp must contain complement

53. A patient on the dental chair has cardiac arrest which is INCORRECT,A. Observing the vital signs and check that the air way is clear is at high importanceB. Expired air has 15% O2 only, and cardiac compressions achieve 30-40% of cardiac

outputC. Intermittent positive pressure at the rate of 40/min will reduce the chances of

cerebral hypoxiaD. Intermittent positive pressure is better than mouth to mouth when it has been given at

the same rate.

54. Which of the following is true in regards to smoking,A. Smokers keratosis is common but metaplasia activity is not recognisedB. Redox potential is increased resulting in aerobic bacteriaC. Tissue perfusion is decreased resulting in increased infection

55. A 9 year old boy has a small white discolouration on his maxillary centralincisor. The lesion is most probably,

A. Hypocalcification due to trauma of the primary predecessorB. Hypoplasia due to acute systemic infection when 6-12 months oldC. Defect during the histo differentiation stage of developmentD. Defect during the morho differentiation stage of development

56. The best method to take X-ray of the maxillary sinus is,A. Periapical radiographB. Panoramic viewC. Lateral cephaloghraphD. Occipitomental viewE. Reverse Townes view

57. Which of the following is not a part of the fully formed enamel organ,

A. Outer enamel epitheliumB. Inner enamel epithelium

58. 18 years old female her weight is 52Kg and she is 163cm tall. On dentalexamination erosion of teeth on the most of her lingual surfaces is clearlyshowing. Dietary history revealed a daily rate of 5000 to 7000 Kcal/day. Whatismost probable would be her case?

A. AlcoholismB. Drug abuseC. BulimiaD. Excessive smokingE. Diabetic mellitus type I

59. Which one of the following is true in regards t osseointegration implants indentistry?

A. Fibrous tissues are formed and integrated directly between titanium and boneB. Following insertion, implants can be immediately loaded without problemC. The success of the implants is directly proportional to its area of contact with boneD. The success of the implants depends mostly on low torque preparation and insertion

of the fixtureE. The success of integration is accurately investigated by immediate radiographic

examination

60. Generalised lost of tooth structure by chemical means called,A. ErosionB. Attrition

61. On X-ray, the buccal roots of 16 is considerably elongated; this is a result of,A. Too great vertical angulationB. Inadequate vertical angulationC. Excessive object film distance

62. The principle muscle responsible for the opening of the mouth is,F. Mylohyoid

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G. Anterior temporalH. Posterior temporalI. Anterior belly of digastric

63. Denture stomatitis is commonly associated with,A. The continuous wearing of removable orthodontic appliances in otherwise healthy

patientB. The proliferation of hypertrophic tissue at the denture peripheryC. The overgrowth of some constituents of oral normal microfloraD. Allergy to denture base material

64. Which is NOT usually related to gingival inflammation in children?A. Endocrine disturbanceB. Viral infectionC. Mouth breathingD. Spirochetal infectionE. Streptococcal infection

65. Which of the following is NOT characteristic of Downs syndrome?A. Decreased neutrophil functionB. MacroglossiaC. MacrodontiaD. An increased susceptibility to periodontal diseaseE. Congenitally missing teeth

66. Which of the following is the best evidence that a previous periodontaltreatment is successful?

A. The patient keeps a 3 month recall appointmentB. There is no extrinsic stainC. The patient demonstrates good understanding of brushing and flossing

techniquesD. There is no bleeding on probing