September 2004 Paper 1 MCQs

1. In the preparation of Premolar class I cavity wh at is the best way of getting

retention, A. Slightly done undercut of the mesial and distal walls B. Slightly done undercut of the buccal and lingual walls C. The convergence of the cavity walls

2. In respect to Class V A. 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 pat ient comes back to you

complaining of pain on masticating and biting; what is the first thing you would look at,

A. Occlusal height B. Contacts areas

4. Child comes to your clinic with a fractured inci sor 3 mm super-gingival, how

would you treat the case, A. Formocretasol pulpotomy B. Calcium hydroxide pulpotomy C. Pulpectomy D. Direct capping E. Indirect capping

5. What is Ante’s Law about, A. The relation between the span of the bridge and the poetics B. The periodontal area of the abutment teeth C. The relation between the length of the root and the abutment.

6. What is the best way to cement Maryland bridge, A. GIC B. Resin C. High compression restorative resin D. Zinc Phosphate cement E. Oxide Zinc and eugenol

7. The ideal length of core in the fabrication of c rown and core of endodontically

treated tooth is, A. 1.5 of crown length B. The length of the crown C. 2/3 tooth/root length D. ½ root length

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

dentures, A. Take the denture off for a week B. Rinse the denture in nystatin C. Apply tissue conditioner

9. While you finishing a class I cavity, the enamel is sound but you noticed in the

dentine and on the Dento-enamel junction a brown li ne, what is your response, A. You leave it and complete the final restoration B. You extend you preparation and clean it C. You apply a cover of varnish

10. Dental caries of the proximal surfaces are usua lly start at, A. Somewhere between the ridge and the contact area B. Just gingival to contact areas C. Just about the gingival margin

11. What is the property of high copper amalgam

A. Reduced physical creep B. Higher retention

12. In regards to colours what is Chroma stands for , A. Degree of saturation of hue B. Brightness C. Value D. Contrast

13. Frankfort plane extends from, A. horizontally from Sella to nasion B. Sagittal from …. C. Horizontally from point on superior aspect of ex ternal auditory meatus to

orbitale 14. Which of the following local anaesthetic is ind icated in case of the need to long

acting one after a surgical operation, A. Lidocaine B. Mepivacaine C. Bupivacaine (Marcaine)

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

16. Which one of this restorative method will be LE AST compromised by a core, A. Amalgam B. Composite C. GIC D. Cast gold

17. In preparing a very small proximal amalgam cavi ty on a molar tooth what would

consider, A. Extend the cavity to the gingival margin B. Extend the cavity beyond the contacts areas C. Achieve at least 2mm in dentine D. Extend cavity just beyond dento enamel junction

18. What is true about partial dentures, A. They cause an immediate changes in the oral plaq ue behaviour B. Night wearing of dentures reduces plaque accumulation C. Relieving the gingival area reduces the gingival enlargement.

19. The biting load of denture base to tissues comp ared to teeth are, A. Ten times more B. Ten times less C. Equal

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

21. the different between normal stone and the dye stone is, A. In the particles size B. The amount of water

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

23. A patient comes to you with medium pain of toot h filled with Composite resin

as a result of cold or hot drinks, what your initia l management will be, A. Remove the restorative material and start an Endontic treatment B. Remove the restorative material and place a seda tive temporary material C. Place a coat of bonding material on the old composite

24. Throbbing pain increases with heat and cold sti muli, the MOST probable diagnosis is,

A. Cyst B. Occlusal trauma C. Advanced pulpitis

25. In making your custom trays which of the follow ing is true, A. A uniform thickness is required B. Perforation is better C. Only adhesive is better than perforation

26. The beam that leaves the target is called, A. The primary X-ray B. The electrons C. The secondary rays D. X-rays photons

27. The most common cause of caries in children is, A. Soft diet B. High intake of carbohydrate C. Poor oral hygiene

28. The best storage media for avulsed tooth is, A. Saline B. Milk C. Water D. Saliva

29. An occlusal approaching clasp TIP, A. Should occupy a predetermined undercut B. Contact the tooth under the survey line C. Rigid

30. In the construction of partial denture the surv eyor is not used to, A. Contour the wax as part of the fabrication of th e working cast B. Locate the guide planes C. Determine the location of indirect retainers D. Identify any undesirable undercuts

31. The advantage of the silicone in soft relining material over ….. rubber is, A. Retains high flow B. Prevents the colonization of Candida albicans C. Resilient in long run D. Better bond strength

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

33. A female patient comes to you complaining of pe rsistent pain in heavily

restored central incisor; you suspect pulpitis and you have been told that she is in transit leaving by plane next day. Your treatmen t will be,

A. Remove filling and place a sedative dressings B. Pulp extirpation and obturate with Ledermix dres sings C. Prescribe analgesics and systemic antibiotic

34. which of the following is true regarding TMJ dy sfunction, A. It is always due to arthritis, should be treated with NSAIDS before attempting surgery B. Raising bite increases the space in the joint an d should be attempted before

surgery C. 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 surface C. The cervical third

36. Occlusal cavity with extension of the buccal fi ssure is classified as, A. Class II B. Class III C. Class I

37. Which of the following does not affect the elas ticity of retentive clasp? A. Length of the arm B. The cross section shape C. The material used D. The undercut area

38. Following calcium hydroxide pulpotomy, the dent ist would expect dentine

bridge to form at, A. The exact level of amputation B. Level some where below the amputation C. Half way between amputation and apex D. At the apical region of the tooth

39. In the construction of a full veneer gold crown , future recession of gingival

tissue can be prevented or at least minimised by, A. Extension of the crown 1 mm under the gingival crevice B. Reproduction of normal tooth incline in the ging ival one third of the crown C. Slight over contouring of the tooth in the gingival one fifth of the crown D. 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 the

mouth is a result of, A. Contraction of the metal framework during casting B. Insufficient expansion of the investment material C. Distortion of impression D. Failure to block out unwanted undercuts

41. Which of the following muscles may affect the b orders of mandibular complete

denture? A. Mentalis B. Lateral pterygoid C. Orbicularis oris D. Levator oris E. Temporalis

42. Jaw relations for edentulous patient have been established. The maxillary cast

has been mounted on the articulator without face-bo w and you decided to increase the occlusal vertical dimension by 4 mm. t his will necessitate,

A. Opening the articulator 4 mm B. A new centric relation record C. Changes in the condylar guide settings D. Increase in the vertical dimension

43. What is correct in regards to high copper amalg am, A. Reacts and strengthens the amalgam by its dispersion properties B. Reacts to form copper-tin phase thereby eliminat ing the tin-mercury phase C. 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 firing B. High compression

45. What is the main purpose of using corticosteroi ds in pulpal obturation

material? A. For their antibiotic action B. For their antiinflammatory action C. To relief pulp pressure

46. Which of the following statements is incorrect regarding Smoker’s Keratosis? A. Typically affects the hard palate B. Minor mucous glands are swollen with red orifices C. There is a little regression if smoking is stopp ed

September 2004 Paper 2 MCQs

1. The blood supply to the denture bearing areas of the maxilla A. Superior Maxillary artery B. Grand/greater palatine artery

2. What could be MOST cariogenic, A. Consuming a lot of carbohydrate with meals B. Consuming a lot of elective sweets during meals C. Excessive consumption of sugar soft drinks all day D. Consumption of elective sweets between meals

3. 13 years old boy comes to you with excessive hyp erplasia of the gingiva as a

result of Phenytoin what is your management, A. Stop the medication B. Force a strict oral hygiene and surgical removal of excess gingival tissues C. Debridement and conservative approach

4. During swallowing, a) suprahyoid muscles relax b ) masseter contract c) tongue

touches the palate A. a and b B. a and c C. b and c D. none of the above E. all of the above

5. White man 56 years old comes to you with a brown spot on his gingiva and

another one on his oral mucosa, when taking the his tory he mentioned a weight and memory lost. He as well complains of headaches. What is your most probable diagnosis,

A. Addison’s disease B. Hyperthyroidism

6. While removing the second primary molar of 9 yea rs old child, the apical ¼ of

the root fracture and stay in the socket, A. You will just leave it and observe it B. You take surgically by a lingual flap C. You try to take out by using a root apex elevator D. You use a fine end forceps to take it out

7. Subgingival plaque changes from, A. gram positive to gram negative B. gram negative to gram positive 8. What is the most important factor to reduces den tal irradiation, A. Speed of film B. Collimation C. Filtration D. Cone shape and length

9. With view to Nitrous Oxide what is the major pha rmacological problem? A. Contraindicated in pregnancy B. Contra indicated in cardiac dysrhythmias

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

10. Which of the following is an expansile lesion o f the oral mucosa, A. Keratocyte B. Radicular cyst C. Cementoma

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

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

13. Which of the following most probable does not e xist in the kids acute gingivitis, A. Spirochetes B. Streptococcus C. 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 anaerobi c bacteria B. It is immuno-suppressive C. It is adrenergic

16. patient in your dental chair shows chest pain, weak pulse and dysponea, what

is your initial management, A. Give a nitro-glycerine tablet and keep the patie nt up seated /This answers is for

any of the angina symptoms B. Put the patient in supine position C. Do nothing and wait until the symptoms go

17. What are two teeth connected at the cementum ca lled,

A. Concrescence B. Dilaceration C. Gemination D. Fusion

18. Developer contaminated with other chemical and was not mixed properly. What

is the effect on the X-ray film? A. Too dark film B. Light film C. Foggy

19. Which part of the cranium is considered as the most stable area, A. Frankfort plane B. Occlusal plane C. Anterior cranial plane D. 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 mouths B. The occlusal convergence of the deciduous teeth

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

prepared socket, A. New well formed periodontal ligament B. Degree of external resorption and fibrous tissue s C. New well formatted lamina dura

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

remember this question A. Lateral pterygoid B. Medial pterygoid C. Masseter D. Temporalis E. Mylohyoid

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

24. Branchial Cleft cyst is located , A. Medial to the neck B. On anterior border of the Sternocleidomastoid mu scle C. Shows when swallowing

25. the most common way of oral carcinomas to other tissues is/are A. Lymphatic B. Invasion and blood C. Lymphatic and invasion D. Blood and lymphatic

26. What is true about smokers, A. Causes immunosuppression B. Increase redox potential of smokers fibrous grow th of anaerobic organisms C. Defects neutrophil function and characteristics D. Can produce smokers palate but rarely metaplasia

27. The main purpose of periodontal treatment is, A. Elimination of plaque and calculus B. Elimination of periodontal pockets C. Reformation of all the periodontal ligaments D. The elimination of all occlusal trauma 28. What is the approximate unstimulated salivary f low rate, A. 2 ml/min B. 0.2 ml/min C. 0.02 ml/min D. 20 ml/min

29. Why is it difficult to use matrices on deciduou s teeth, A. It hurts the kids’ parents B. 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 status B. The patient’s response will be either pain or no pain C. The patient can differentiate between cold or hot stimuli 31. Immediately after the extraction of lower molar the patient complains of post

operation bleeding and pain, how would manage this, A. Prescribe analgesics and ask the patient to follow a strict oral hygiene B. Administer 5% Marcaine Local Anastatic, prescribe analgesics and pack the socket

with alvogyl C. Administer 5% Marcaine Local Anastatic, suture t he socket and prescribe

analgesics D. Suture and give pressure packs 32. Gracey curette is characterized by, A. The blade and the shank form 90º angle B. Can be used on both sides C. Can be used on any tooth surface

D. It is specific for each surface of the tooth

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

A. take a new impression by asking the patient to occlude on it B. 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 o bturation, A. To prevent the inflammatory process B. As an Antibiotic C. To minimize pressure on the periapical tissues

35. As a result of wrong use of tooth brush the pat ient MOST probable complaint

will be when, A. Spontaneous pain or discomfort B. Occasional pain during brushing of the teeth C. Occasional pain during consumption of sweets

36. In regards to dentine strength, which is the ri ght sequence, A. Affected dentine> Sound dentine> Infected dentine B. Sound dentine> Affected dentine> Infected dentin e

37. Symptoms free patient comes to you after four w eeks of an endodontic

treatment and you find on radiograph the canal is over filled with what it seems to be a cone of Gutta Percha 1mm beyond the apex wi th a radiolucent small area. What is your initial management?,

A. Start apiectomy through a flap and surgery B. Obturate the root canal C. Ask for a recall and observe in three months tim e D. Seal the pulp chamber and keep it under observation

38. After obturation and on X-ray you notice the ob turation materials are 1mm

beyond apex. What is your first management? A. Refill the canal B. Pull the GP cone about 1mm out and take a new X- ray C. Leave it as it

39. 2.21mg NaF contains, A. 1mg fluoride B. 2 mg C. 0.5 mg

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

41. Stiffness of material are measured by, A. Proportional unit B. Modules of elasticity C. Stress/ strain

42. What is the purpose of making a record of protr usive relation and what function does 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 cond ylar paths of the patient.

This is the answer of the American board, to aid in establishing the occlusal vertical dimension and to adjust the condylar guides of the articulator so that they are equivalent to the condylar paths of the patient

43. Four years kid shows at your clinic with open b ite as a result of thumb sucking,

you notice a delayed speech ability what would be y our first management, A. Refer to a speech therapist B. Apply a removable habit inhibitor denture C. 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 showin g with what looks like eye drop radiolucency. You decided to start endodontic treat ment on these teeth but you tried to open access to the root canal you find clearly clos ed orifices with what look like secondary dentine. What is your initial management?

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

45. A patient with no positive history came along f or scaling. The moment you pick

up the scaler you punch your finger, what should yo u do? A. Complete the procedure as nothing has happened B. Check patient’s blood for Hepatitis B antibody HBsAb C. Check patient’s blood for Hepatitis B antigen HBsAg D. Check dentist’s blood for Hepatitis B antibody HBsAb and HIV antigen HIVAg E. Check dentist’s blood for Hepatitis B antigen HBsAg and HIV antibody HIVAb F. 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 epithelium B. At the top of the gingival calculus

47. After the initial development stage and in the absence of pathology, a the size

of the pulp chamber has been reduced by, A. Deposition of primary dentine B. Deposition of secondary dentine C. Reparative dentine D. Pulp fibrosis E. Deposition of reparative dentine

48. The most desirable outcome of endodontic treatm ent is, A. The healing of the alveolar bone B. The deposition of cementum at the apex C. Formation of fibrous capsule around the apex

49. What is NOT related to the normal aging process ? A. Progressive bone loss B. Reduced elasticity of muscles C. Decreased elasticity of the skin D. Lower pain threshold

50. As far as localised alveolar osteitis is concer ned; which one of the following is

true? A. The incidence in the mandible and maxilla is similar B. 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 mandatory E. Zn oxide eugenol and alvogyl dressing promote a rapid bone growth

51. The most accurate finding of pulpal pathology A. Radiolucency on the apical region B. Pain on hot or cold drinks C. The absence of response to pulp testing

52. for dental caries to progress in dentine, the dentine must contain soluble collagen A. enamel must contain glycoproteins B. diet must contain simple carbohydrate C. diet must contain polysaccharides

D. pulp must contain complement

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

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

cerebral hypoxia D. 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 sm oking, A. Smokers keratosis is common but metaplasia activity is not recognised B. Redox potential is increased resulting in aerobic bacteria C. Tissue perfusion is decreased resulting in incre ased infection

55. A 9 year old boy has a small white discolourati on on his maxillary central

incisor. The lesion is most probably, A. Hypocalcification due to trauma of the primary p redecessor B. Hypoplasia due to acute systemic infection when 6-12 months old C. Defect during the histo differentiation stage of development D. Defect during the morho differentiation stage of development

56. The best method to take X-ray of the maxillary sinus is, A. Periapical radiograph B. Panoramic view C. Lateral cephaloghraph D. Occipitomental view E. Reverse Towne’s view

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

A. Outer enamel epithelium B. Inner enamel epithelium

58. 18 years old female her weight is 52Kg and she is 163cm tall. On dental

examination erosion of teeth on the most of her lin gual surfaces is clearly showing. Dietary history revealed a daily rate of 5 000 to 7000 Kcal/day. What is most probable would be her case?

A. Alcoholism B. Drug abuse C. Bulimia D. Excessive smoking E. Diabetic mellitus type I

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

dentistry? A. Fibrous tissues are formed and integrated direct ly between titanium and bone B. Following insertion, implants can be immediately loaded without problem C. The success of the implants is directly proportional to its area of contact with bone D. The success of the implants depends mostly on low torque preparation and insertion

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

examination

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

61. On X-ray, the buccal roots of 16 is considerabl y elongated; this is a result of, A. Too great vertical angulation B. Inadequate vertical angulation C. Excessive object film distance

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

G. Anterior temporal H. Posterior temporal I. Anterior belly of digastric

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

patient B. The proliferation of hypertrophic tissue at the denture periphery C. The overgrowth of some constituents of oral norm al microflora D. Allergy to denture base material

64. Which is NOT usually related to gingival inflam mation in children? A. Endocrine disturbance B. Viral infection C. Mouth breathing D. Spirochetal infection E. Streptococcal infection

65. Which of the following is NOT characteristic of Down’s syndrome? A. Decreased neutrophil function B. Macroglossia C. Macrodontia D. An increased susceptibility to periodontal disease E. Congenitally missing teeth

66. Which of the following is the best evidence tha t a previous periodontal

treatment is successful? A. The patient keeps a 3 month recall appointment B. There is no extrinsic stain C. The patient demonstrates good understanding of brushing and flossing

techniques D. There is no bleeding on probing