523. ‘P’ wave in ECG recording is caused due to:

1. Atrial depolarization.

2. Atrial repolarization.

3. Ventricular depolarization.

4. Ventricular repolarization. 

519. Delta waves of electroencephalogram have frequency of:

1. More than 14 cycles per second. 
2. Between 8 and 13 cycles per second. 
3. Less than 3.5 cycles per second. 
4. Between 4 and 7 cycles per second.

260- 309 : DENTAL MCQ'S: MULTIPLE CHOICE QUESTIONS

 

1.     Glutathione is a tripeptide of

a.       Glutamic acid, glycine and  cysteine 

b.       Glycine, cystine, serine

c.        Glutamic acid, serine                   

d.       Glutamic acid, arginine, lysine

2.     In the practice of occlusal equilibration, which of the following is undertaken?

a.       Anterior splint therapy Maxillary training                      

b.       Maxillary training                                                   

c.        osterior eccentric interferences are removed, resulting In less muscle stress

d.       The production of an overlap of the anterior teeth

3.     Branches of third part of maxillary artery are all

except

    a.  Sphenopalatine                 b. Middle meningeal

    c.  Greater palatine.              d. Posterior superior alveolar

4.     NBT is a test of

    a.  Phagocytic capacity     b. Complement activity

       c.  Cellular immunity        d. Humoral immunity.

5.     Hematosis is dependent upon all except

    a.  Vessel wall                  b. Blood viscosity

    b.  Platelet                        d. Coagulation system

6.     The most common complication following the

        extraction of a tooth is

    a.  Alveolar osteitis            b. Dental caries

    c.  Actinomycosis              d. Alveolar abscess 

7.     Truss arm is

       a.  Reciprocal arm             b. Retentive arm

       c.  Minor connector           d. Major connector

8.     An elderly subject, complains of facial muscle

        weakness, difficulty in chewing and swallowing and

        speech. There is a history of his father also having

        had the same symptoms, he is probably suffering

        from:

      a.   Horner’s syndrome       b. Bulbar palsy

      c.   Pseudobulbar palsy      d. Orofacial dyskinesia

9.     Anachoretic pulpitis is:

a.       Transient pulpitis             

b.       Acute subtotal pulpitis

c.        Bacterial infection of pulp

d.       None of the above

10. Bordetella colonies appear as

       a.  Dew drop                       b. Mercury drop

       c.  Green                            d. None of the above

11. Early synostosis of sutures occurs in

   a.  Craniofacial dysostosi   b. Marble bone disease

 .    c.  Osteitis deformans        d. Cherubism

12. In the treatment of oral lichen planus , one of the drug usually used is:

       a.  Streptomycin                 b. Amphoterecin B

       c.  tertracyline                    d. None of the above

13.  Endospores are formed by

       a.  Clostridia                        b. Corynebacteria

       c.  Cyanobacteria                d. Actinomyces

14. Among the following disease which is not associated with enlargement of jaw bones.

a.     Paget’s disease of the bone

b.     Focal chronic sclerosing osteomyelitis

c.     Ossifying fibroma

d.     Central giant cell granuloma

15. Histopathologically, the first sign in pulp,l which show  that irreversible pulpitis has set in is:

a.     Inflammation in subodontogenic zone

b.     Micorabscesses

c.     Pulpal necrosis

d.     Wheat sheaf appearance

16. Contraindications to bridges are

a.     When space is of such length that additional load will impair tissue health around abutments.

b.     When the space length requires a beam of a such Mension that embrasures will be greatly reduced and underlyin  tissue  overprotected

c.     When previous prosthesis produced an unfavorable reaction in mucous membrane

d.     All of the above

17. The racial isolate in dentiongenesis imperfecta is:

      a.   Type 1      b. Type 11      c.  Type 111       d. Type IV                 

18. Which of the following is a mismatch

a.     a.Haemochromatosis -disorder or iron metabolism

b.     b.Haematemesis -vomiting of blood

c.     Hemoglobinuria- the presence of RBC in urine

d.     d.Haemostas - the arrest of bleeding

19. A 32 years old female has got oral cancer, the site where it  is least likely to be situated is:

       a.   Lips                                   b. Faucial pillars

       c.   Palate                                d. Ventral surface of tongue

20. Requirements (intangibles) of bridge construction include

a.      Forces developed by the oral mechanism and by theresistance of the tooth and supporting tissue to them

b.      Modifications of normal tooth form that reduce forces or increase resistance to them

c.      Establishing normal tissue tone

d.      All of the above

21. Basal cell carcinoma usually presents in

      a.   Upper third face          b. Middle third face

      c.    Around chin                d. Intraorally

22. Porcelain should be the material of choice

a.     When a facing is demanded for cosmetic reasons

b.     When the material is to be used without the support of metal

c.     For other than for veneer purposes

d.     Since extensive inflammatory changes occur in adjacent soft tissue

23. In anorexia nervosa one of the clinical entities

        usually observed is:

      a.  Peripapical radiolucencies          b. Abrasion of ant teeth

      c.  Erosion of teeth                            d. None of the above

 24. Battle sign is associated with

a.     Fracture zygoma   

b.     Fracture anterior cranial fossa

c.     Fracture middle cranial fossa

d.     Fracture naso ethmoid

 25. Anemia occurs in renal failure due to

       a.  Decreased RBC production        b. Blood loss

       c.  Increased RBC destruction         d. All of the above.

 26. Broken – down vital teeth may be used as an abutment for a full crown retainer

a.      Never

b.     When iridioplatium wire in the form of a staple is used for reinforcement

c.     After placing silver alloy filling

d.     After placing oxyphosphate of zinc cement

 27. The choice of method of tooth replacement should be considered in which of the following orders?

a.     Fixed partial denture, complete denture, removable partial denture

b.     Complete denture, fixed and removable partial denture

c.     Removable partial, complete denture, fixed partial denture

d.     Fixed partial denture, removable partial denture, complete denture

  28. Among the following, in which patent GA is a contraindicated

a.     An adult male over 65 yrs of age

b.     Patient with acute respiratory infection

c.     Child under 6 yrs of age

d.     Patient with well compensated heart disease

 29. A disadvantage of the direct method  for constructing fixed partial dentures is

a.     It cannot be readily used for all types of retainers

b.     It requires more appointments than the indirect method

c.     Marginal adaptation of retainers is difficult to obtain

d.     All of the above

 30. The feature which is not seen in Marfan’s syndrome 

       a. Arachnodactyly               b. Dolichostenomelia

       c. Buifid uvula                     d. Cleft palate

 31. When one or more distal extension bases are  involved, which of the following factor must be  considered

a.     Need for indirect retention

b.     Clasp designs which minimize one forces applied to the abutment during function

c.     Need for later rebasing

d.     All of the above

32. Rigidity of the major connector may be made more certain by employing one or more of which of the

      following?

a.     Use a cast rather than a wrought iron connector

b.     Avoid a flat or ribbon – shaped connection

c.     Increase the bulk of a major connector

d.     All of the above

33. Which of the following are serious defects inherent in a radiographic method of determining the balance of the patient’s supporting bone?

a.     Favorable appliance support may be found in patients having less dense bone as well as those having bone  which is dense

b.     There is a lack of agreement of whether dense or less Dense bone assumed extra work loads with least  tendency  to atrophic change

c.     The apparent density of the alveolar bone varies in the same specimen when there is a change in the angulation of  film or in exposure or processing

d.     All of the above

34. An advantage of hydrocolloid materials for partial

      denture is

a.     It will remove from undercut areas without permanently deforming or tearing

b.     It is a one – piece impression

c.     No separating medium is required  

d.     All of the above

35. Denture stability is enhanced

a.     By placing the occlusal areas distant from their support

b.     By placing occlusal areas close to their support

c.     When the patient does not chew vertically

d.     By not centralizing the occlusal areas

36. A pathologic occlusion can be modified to a

      therapeutic occlusion by correcting

a.       Alignment                     

b.       Esthetics

c.        Inter arch relationships 

d.       All of the above

37. Inflammatory reaction of basal mucosa is the result of   

a.       Removing dentures to allow tissue to rest

b.       Absence of hyperemia

c.        Endocrine disturbance    

d.       Good oral hygiene

38. Setting teeth with their long axes parallel to each other

a.     Produces very natural looking teeth

b.     Causes people to be happy with their dentures

c.     Never causes patients to be irritated by the appearance of their dentures.

d.     Produces an artificial appearance to the dentures.

39. The isolation of Streptococcus mutans nears 100%

a.     At birth             

b.     When the deciduous incisors erupt

c.     When the permanent incisors erupt  

d.     Adulthood

40. Which of the following are physical properties of

      the lectithins?

a.     When purified they are waxy white substances

b.     They are soluble in fat solvents with the exception of  acetone

c.     They are hygroscopic and mix well with water to form colloidal solution

d.     They are all of the above

41. Characteristics of lipids include which of the following

a.     Solubility in ether ( organic solvents)

b.     Solubility in chloroform ( organic solvents)

c.     Presence of esterified fatty acids

d.     All of the above

42. A marked increase in tongue coating is usually associated with

a.     Pernicious anemia

b.     Late stage of scarlet fever

c.     Median rhomboid glossitis

d.     Disturbances in oral physiology

43. The developing mandible grows backward (not surrounding  Meckel’s cartilage) to form

       a.  The incus and malleus       b. The otic capsule

       c.   The hyoid cartilage           d. The coronoid process

44. Gastric juice is composed of

a.     50% water and 50% organic substances

b.     70% water and 30% inorganic substances

c.     99.4% water and solids (organic substances and in   organic  constituents)

d.     None of the above

45. Malposition of the mandible due to occlusal  disharmony

a.     May result in muscular imbalance, trismus, and pain

b.     Caused drifting of teeth

c.     Causes sleeping habits

d.     Results in neoplasms of TMJ

46. The effective focal spot is

a.     Smaller than the actual focal spot

b.     Usually square in shape

c.     Circular with a 2.75 inch diameter

d.     Larger than the actual focal spot

47. Which of the following helminthic disease is transmitted by direct skin penetration by the larva?

      a.   Filariasis                       b. Onchocercasis

      c.   Dracunculosis               d. Schistosomiasis

48. Intraoral radiographs of a young patient revealed a smoothly outlined 2 cm radiolucent area in the  mandibular molar region. the radiolucency scalloped between the roots of the vital molars. The most likely diagnosis is a

a.       Solitary bone cyst             b. Static bone cavity

c.    Normal maxillary sinus    d. Dentigerous cyst

49. The denture - bearing area covering the incisive  foramen

a.     Should be relieved routinely to prevent impingement of nasopalatine nerves and blood vessels

b.     Should not be relieved routinely

c.     Should be relieved routinely to prevent impingement on the mental nerve

d.     Is surrounded by a sharp marrow annular ridge

50. After dentin and enamel formation have reached the

        cementaoenamel junction, the cervical loop

a.     Degenerates and disappears

b.     Becomes transformed into epithelial sheath of Hertwing

c.     Forms the membrana preformativa

d.     Forms the cell – free zone

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FOR MORE IN DENTISTRY: VISIT RxDENTISTRY LOVEHUES DENTAL MATRIX

201-210

201. Hinge axis is best detected by:

a. face bow transfer and freely adjustable condylar pieces.
b. face bow with three point articulator.
c. with face bow only.
d. with articulator only.


202. The size of wire used to reinforce porcelien bridges is:


a. 10 gauze.
b. 12 gauze
c. 14 gauze
d. 15 gauze


203.Prevalence of the disease affects:

a. sensitivity
b. specificity.
c. predictive value.
d. repeatability.


204.Hepatitis B occurs after incubation period of:


a. 1 week
b. 3 weeks.
c. 3 months.
d. 6 months.

205.Collar stud abscess is associated with:


a. M. tuberculosis.
b. M. leprae.
c. C. tetani.
d. none of the above.

206.Primary lesion in the lichen planus is:


a. macule.
b. papule.
c. vesicle.
d. bulla.


207.Steven-johnson syndrome involves:


a. type I hypersensitivity reaction.
b. type II hypersensitivity reaction.
C. type III hypersensitivity reaction.
d. type IV hypersensitivity reaction.
 
208.Which of the following have radiolucency closest to dentin?


a. ZOE
B. calcium hydroxide.
c. silicophosphate.
d. gutta-percha.


209.All of the following form radiolucent stones except?


a. xanthine.
b. cysteine.
c. allopurinol.
d. orotic acid.



210. forceps used for maxillary fracture disimpaction?


a. rowe's
b. bristows.
c. ashs.
d. walshams.



Leave answers in comments section

FOR MORE IN DENTISTRY: VISIT

RxDENTISTRY

LOVEHUES

DENTAL MATRIX

(191-200)191. Which condition is characterized by pain that is spontaneous and has periods of cessation (intermittent in nature)?

a. Reversible pulpitis b. Irreversible pulpitis
c. Both a & b d. None of the above

192. A patient complains of a constant pain , dull
in nature, in nature, in contrast to the sudden
sharp, shooting, intermittent pain of
neuralglias(chronic pain) and pain ranging from
mild to intolerable in the muscles of head &
neck,the most likely underlying cause is
a. Trigeminal neuralgia
b. Facial palsy
c. MPDS
d. Cluster head ache


193.True statement/s about Sublingual space
infection is/are
a. Infection always crosses midline\
b. Infection from the posteroinferior part of the
space, can spread around the Submandibular gland
into Submandibular space
c. Infection can also spread via the lymphatics to the
sibmental or Submandibular Lymphnodes
d. ALL of the above


194. A patient presents with pain & tenderness,
nonhealing bony & overlying soft tissue wounds
with indurations of soft tissues, intra & extraoral
draining fistulae Thickened or wooden character
of bone the most likely diagnosis is
a. Chronic osteomyelitis
b. Acute suppurative osteomyelitis
c. Garre’s sclerosing osteomyelitis
d. ALL of the above


195. There is disruption or loss of continuity of
some axons, which undergo Wallerin
degeneration distal to the site of injury, this type
if nerve injury is called
a. Neuropraxia
b. Neurotemisis
c. Axonotmesis
d. None of the above


196. Malignant epithelial tissue tumors are known
as
a. Myxomas
b. Teratomas
c. Carcinomas
d. Sarcomas


197. An anesthetic agent capable of promoting
fatty degeneration in the liver is
a. Ether
b. Chloroform
c. Nitrous oxide
d. Cylopropanes


198. In the reflection of a mucoperiosteal flap
a. Acute angles are requirement
b. A vertical incision must be made
c. The incision should always be made around the
necks of the teeth
d. The base must be broader than the free margin


199. The advantage/s of marsupialization (Parch)
in the treatment of cysts is/are

a. Preservation of vital structures
b. Exposure of very little bone
c. Simplicity of the procedure
d. ALL of the above


200. A liver cirrhosis in a patient be of concern to
an oral surgeon because
a. Hemorrhage may occur following surgery
b. Delayed Detoxification of drugs
c. Healing is slower
d. ALL of the above

(161-170)161. Which of the following is not true about hand instruments used in Operative Dentistry?

A. They are generally made of stainless steel.
B. Nickel-Cobalt-Chromium is never used in its
fabrication
C. Carbon steel is more efficient than stainless steel
D. It can be made with stainless steel with carbide
inserts

162. An electric pulp tester (EPT or Vitalometer)
usually elicits a response at a higher current than
normal if a tooth, being tested has:
a. Open apex b.A pus-filled canal
c. Suffered a trauma d. Chronic pulpitis
 

163. According to the buccal object rule, when the xray
tube is repositioned either at a more mesial or at
a more distal angulation and a film is exposed, the
root or canal farther from the film (the buccal) will

a.Move in the opposite direction that the cone is
directed
b.Move in the same direction that the cone is directed
c.Not move at all
d.none of the above
 

164. Which of the following canals in a maxillary
first molar is usually the most difficult to locate?

a. Palatal b. Distobuccal
c. Mesiobuccal
d. All of the canals are relatively easy to find
 

165. In which of the following conditions will the
involved teeth most likely not require endodontic
treatment if managed properly?
a. Globulomaxillary cyst
b. Radicular cyst
c. Chronic dental abscess
d. Chronic periapical granuloma
 

166. Which of the following is not an indication to
use solvent-softened custom cones?
a. Tugback" within 1 mm of working length
b. Lack of an apical stop
c. An abnormally large apical portion of the canal
d. An irregular apical portion of the canal
 

167. The property of gold that is not affected by
cold working
a. Proportional limit b. Hardness
c. Ductility d. Modulus of elasticity
 

168. Osteoporosis of the jaws is not related to
a. Hyperthyroidism b. Hypoandrogenesis
c. Cushing’s syndrome d. Adenocarcinoma of stomach

169. The speed of injection of a local anesthetic

a. Causes injection into a vascular channel
b. Modifies the actual final blood level obtained
from a local anesthetic
c. Reduces the actual peak blood level attained
d. Increase the vascularity of the local area

170. The incidence of asymptomatic carriage of
type B hepatitis is
a. 5% b. 10%
c. <1% d. 20%

(151-160)151. Gram-negative anaerobic cocci are all except

      a. Veillonella                  b. Ruminococcus

      c. Megasphaera             d. None of the above

152. The mucous membrane which covers the alveolar process to the necks of the teeth

a.     May be divided into the epimysin and fornix

b.     May be divided into the alveolar mucosa and gingival

c.     Is the tubercle of the oral mucosa

d.     Is none of the above

153. The blood dyscrasia which has racial predilection is

a.       Sickle cell anemia            b. Thrombocytopenic purpura

c.    Hemphilia                         d.  cryoglobulinemia

154. Congenital micrognathia usually occurs in association with:

a.     Pierre Robin syndrome

b.     Trauma to temporomandibular joint

c.     Parry-Romberg syndrome

d.     Double lip

155. In the cap stage, which of the following cell types can be recognized in the enamel organ?

a.     Outer enamel epithelium, inner enamel epithelium, and stelalte reticulum

b.     Outer enamel epithelium and inner enamel epithelium

c.     Outer enamel epithelium, inner enamel epithelium, and stratum intermedium

d.     Stellate reticulum and dental papilla

156. Acute osteomyelitis has which of the following characteristics?

a.     Is produced by beta – hemolytic streptococcus and pneumococcus

b.     Necrosis of marrow with cellular reaction occurs

c.     Sequestrum, suppuration

d.     All of the above

157. It is customary to refer to airway ventilation as

       a. Alveolar spaces            b. Inspired volume

       c. Free space                   d. Dead space

158. Firm pressure with the tip of the finger along a line where the dental arch joins the body of the mandible will reveal a sensitive spout about 2.5 cm lateral to the midline. This is the site of emergence of

a.     The oral vestibule

b.     The mental nerve from the mental foramen

c.     The fauces                            d. The chin

159. Which of the following is the principal action of ammonia in syncope

a.     Respiratory stimulation

b.     Vasomotor stimulation

c.     Improvement in nerve conduction

d.     Cardiac stimulation

160. Radiographs of a patient demonstrated dense radiopaque cotton-wool appearance of the mandible and pronounced hypercementosis. These findings are suggestive of

a.     Osteitis deformans            b.   Torus mandibular is

b.     Complex composite odontoma   d.  Osteopertrosis