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Q and A LectureLaurenn O. Lacbanes, D.M.D.

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Gen Anat/Oral

Anat/Physio

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Right Subclavian and Rightcommon carotid arteries arise

from the?

a) Arch of the aorta

b) Ascending aorta

c) Brachiocephalic artery

d) Thoracic aorta

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Arch of the Aorta

Brachiocephalic A.

Left Common Carotid A.

Left Subclavian A.

Right

Subclavian

A.

Right

Common

Carotid A.

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Which of the following is the primeextensor of the forearm?

a) Triceps brachii

b) Biceps brachii

c) Latissimus dorsi

d) Brachioradialis

e) Extensor digitorum communis

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Which of the following muscles

adducts the vocal cords?

a) Lateral cricoarytenoid

b) Posterior cricoarytenoid

c) Cricothyroid

d) Tensor veli palatine

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Ependymal cells constitute thetissue that?

a) Lines the ventricles of the brain

b) Lines the ventricles of the heart

c) Forms a part of peripheral neuroglia

d) Covers nerve cell bodies in a ganglion

e) All of the above

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Cribiform plate of ethmoid isfound in the?

a) Anterior cranial fossa

b) Middle cranial fossa

c) Posterior cranial fossa

d) Temporal fossa

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Anterior Cranial

Fossa

Middle Cranial

Fossa

Posterior Cranial

Fossa

Foramen cecum Optic canal Foramen magnum

Cribiform plate ofethmoid

Superior orbitalfissure

Hypoglossal canal

Crista galli Foramen rotundum Jugular foramen

Foramen ovale Internal acousticmeatus

Foramen spinosum Condylar canal

Foramen lacerum

Carotid canal

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Union of superficial temporal andmaxillary vein:

a) retromandibular vein

b) common facial vein

c) internal jugular

d) pterygoid venous plexus

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The three usual primary branches

of the celiac artery are the?

a) Common hepatic, splenic, left gastric

b) Common hepatic, splenic, right gastric

c) Gastroduodenal, splenic, left gastric

d)Right gastroepiploic, splenic, left gastruc

e) Common hepatic, right gastroepiploic, leftgastric

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Impulses representing taste fromthe tongue are back to the brain

via

a) CN VII, CNIX, CN X

b) CN I, CN II, CN VIIIc) CN V, CN VII, CN XI

d) CN V, CN VII, CN X

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The facial nerve innervates the

a) Stylohyoid

b) Posterior belly of digastric

c) Anterior belly of digastric

d) A and B

e) A and Cf) B and C

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The lingula of the mandible serves

as an attachment for the

a) Temporalis muscle

b) Stylomandibular ligamentc) Sphenomandibular ligament

d) Temporomandibular ligament

e) Tendon of digastric muscle

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A muscle that acts to protrudethe mandible

a) Masseter

b) Digastric

c) Lateral pterygoid

d) Temporalis

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Muscles of mastication

Muscle Origin Insertion

Temporalis Temporalis fossa Coronoid process

Internal/ medialpterygoid

medial surface oflateral pterygoid

medial surface oframus and angle ofmandible

Masseter Zygomatic process angle of the

MandibleExternal/lateralpterygoid

Lateral surface oflateral pterygoid

Neck of condyle

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Which recurrent laryngealnerve loops around the arch of the

aorta?a) Right recurrent laryngeal nerve

b) Left recurrent laryngeal nervec) External laryngeal nerve

d) Inferior laryngeal nerve

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Hypomineralized structures which

extend from the DEJ to the surfaceof enamel are called?

a) Enamel rods

b) Enamel lamellae

c) Enamel spindles

d) Enamel tuft

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The infraorbital nerve is a branchof the?

a) Optic nerve

b) Oculomotor nerve

c) Opthalmic nerve

d) Maxillary nerve

e) Mandibular nerve

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In the mandibular block anesthesia, whichof the following is penetrated if the tip of

the needle is resting well below themandibular foramen?

a) Masseterb) Lateral pterygoid

c) Temporal

d) Medial pterygoid

e) Sternocleidomastoid

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All of the following structures liesuperficial to the hyoglossus

muscle except the?

a) Lingual nerve

b) Lingual artery

c) Hypoglossal nerve

d) Submandibular duct

e) All of the above

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Which of the following muscles issupplied by the CN XI?

a) Levator scapulae

b) Latissimus dorsi

c) Trapezius

d) Major rhomboid

e) Minor rhomboid

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CN XITrapeziusraises shoulderewan ko

inserts in inion andsuperior nuchal line

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The tendon of the tensor veli palatinimuscle curves around the

a) Angular spine

b) Styloid process

c) Pterygoid hamulus

d) Neck of the condyle

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The platysma is supplied by

a) CN V

b) CN VII

c) CN IX

d) CN X

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The palatine shelf is a medialextension of the_______ process.

a) Lateral nasal

b) Intermaxillary

c) Maxillary

d) Medial nasal

e) mandibular

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The communication between theinfratemporal fossa and the

pterygopalatine fossa is the

a) Pharnygeal canal

b) Pterygopalatine canal

c) Sphenopalatine foramen

d) Pterygomaxillary fissuree) Pterygomaxillary foramen

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When the permanent maxillary arch is

viewed occlusally, generally thea) Distobuccal angle of the first molar is acute

b) 2ndmolar is wider mesiodistally than the first

molarc) Second premolar is wider buccolingually than the

1stmolar

d) Lingual embrasures are wider than are the buccalembrasures

e) Buccal embrasures are wider than are the lingualembrasures

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What is the usual relation of the

lingual cusp tips of the maxillarypremolars to the buccal cusp tips?

a) Buccal

b) Lingual and distal

c) Exactly lingual

d) Lingual and mesial

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The_____ pterygoid is the primemover in effecting a left working

movement.a) Left lateral

b) Right lateralc) Left medial

d) Right medial

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Which of the following is not amixed nerve:

a) Trochlear

b) Facial

c) CN9

d) CN10

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Sensory: CN 1,2,8

Motor: CN 3,4,6,11,12

Mixed: CN 5,7,9,10

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Innervation of stapedius muscle:

a) facial nerve

b) trigeminal nerve

c) olfactory nerve

d) nerve to the stapedius

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The facial n. enters the internal acousticmeatus together with CN 8 and dividesinto three in bone:

-greater petrosal n.foramen lacerum

-nerve to the stapedius

-chorda tympani

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Facial nerves are derived fromthe ___ branchial arch

a) First

b) Second

c) Third

d) Fourth

e) Fifth and sixth

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CN V 1stbranchial arch

CN VII 2ndbranchial arch

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Digitalis is prescribed to persons withatrial fibrillation because it

a) Depresses A-V conduction

b) Ameliorates A-V conduction

c) Inc. no. of discharges from S-A node

d) Dec. no. of discharge from S-A node

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In a compensation acidosis, the pH ofblood plasma is normal but the total

carbon dioxide content is low. Thecompensation is achieved by

a) Excretion of an alkaline urine

b) Decreasing the volume of respiration per minute

c) Increasing the volume of respiration per minute

d) Excretion of acid urine

e) Increasing the carbon dioxide production

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Compensation acidosismetabolic acidosis

Hyperventilation: respiratory alkalosis

metabolic acidosis

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Administration of heparin is similar to Vit. Kdeficiency in symptoms because both result

in

a) Release of lipoprotein lipase to the blood and rapidclearance of chylomicrons

b) An inc. in bleeding time due to lack of thrombinformation

c) Retardation of fibrinogen synthesis by the liver

d) Elevated non-esterified fatty acids which chelateserum calcium, thus retarding blood clotting

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Activation of the membrane anddevelopment of the spike potential

most likely relates to the

a) Rapid influx of K+

b) Rapid influx of Na+

c) Rapid outflow of K+

d) Rapid outflow of Na+

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Under physiologic conditions, thelowest partial pressure of oxygen is

found ina) Normal atmospheric air

b) Humidified atmospheric airc) Alveolar air

d) Expired air

e) Venous blood

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Linolenic acid and arachidonic acidsare precursors of

a) Prostaglandins

b) Steroid hormones

c) Lecithin and other phospholipids

d) Isoprenoid chains required forcholesterol and vit. A synthesis

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Which part of the nervous systemcontains cardiac, vomiting, and

vasomotor centers?a) Medulla

b) Thalamusc) Cerebral cortex

d) Cervical region of spinal ganglia

e) None of the above

A d fi i f hi h f h f ll i

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A deficiency of which of the followingvitamins would most likely elicit oral

symptoms?a) Pyridoxine (B6)

b) Cobalamine (B12)c) D

d) E

e) k

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The role of liver in edema may bea result of

a) Decreased aldosterone secretion

b) Decreased vasopressin secretion

c) Diminished albumin synthesis

d) All of the above

e) Only a and b

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Extracellular fluid:

a) Is composed mainly of transcellular fluids

b) Makes up the major proportion of total body

waterc) Has a higher sodium/potassium ratio than

intracellular fluid

d) Contains less glucose than intracellular fluid

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Bodys water

2/3 ICF ECF

Soln of

potassium and

organic anions,

proteins, etc.

interstitial fluid plasma

Which amino acid become

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Which amino acid becomehydroxylated in the synthesis of

collagen?a) Serine

b) Tryptophanc) Proline

d) Phenylalanine

e) Arginine

Process by which genetic

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Process by which geneticinformation flows from RNA to

protein isa) Mutationb) Translation

c) Replication

d) Transcription

e) None of the above

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Sympathetic stimulation affectscarbohydrate metabolism because

a) Peripheral tissues require epinephrine totake up glucose

b) Sympathetic nerves to the pancreasregulate insulin release

c) Insulin cannot act on the liver in the absenceof epinephrine

d) Epinephrine increases glycogenolysis

e) None of the above

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Receptors

Parasympathetic and SympatheticPREGANGLIONIC neuronscholinergic

Parasympathetic POSTGANGLIONICcholinergic

Sympathetic POSTGANGLIONICadrenergic (norepinephrine and epinephrine)

ti l t d t ff ti l

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stimulated most effectivelyby

a) Elevated Ph

b) Low oxygen tension

c) High oxygen tension

d) Low carbon dioxide tension

e) Increased arterial blood pressure

Calcium binds to which of the

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Calcium binds to which of thefollowing for contraction of

smoothmuscle?a) Troponin c

b) Calmodulinc) Myosin

d) Actin

e) Desmosomes

Whi h f th f ll i

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Which of the followingproduces inhibin?

a) Sertoli cells

b) Leydig Cells

c) Vas deferens

d) epididymis

Th th id h t

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The parathyroid hormone actson the

a) Distal tubule of the kidney

b) Proximal convoluted tubule

c) Ascending loop

d) Descending loop

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Resto/Comm Dent

Of the following materials the one

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Of the following materials, the oneMOST likely to cause an adverse

pulpal reaction when placed directly ina deep cavity preparation is

a) Silver amalgamb) Calcium hydroxide

c) Silicate cement

d) Zinc-oxide eugenol

e) Zinc phosphate cement

Organization from highest to

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Organization from highest tolowest position :

a) ranking

b) central tendency

c) Scalar

d) practice management

What is the predominant

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What is the predominantcollagen in dentin?

a) Type I

b) type II

c) Type III

d) type IV

Pulp capping is an indicated

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Pulp capping is an indicatedprocedure when there is

a) An accidental mechanical exposure ina clean, dry field

b) No hemorrhage from the exposurec) pain response to cold

d) A large exposure

e) All of the above

Dental wax patterns should be invested

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Dental wax patterns should be investedas soon as possible after fabrication on

order to minimize change in the shapecaused by

a) Reduced flow

b) Drying-out of the wax

c) Relaxation of internal stresses

d) Continued expansion of the waxe) Increased flow

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Which of the following is the

weakest phase of the set amalgam?a) beta-2b) Gamma-2

c) Gamma

d) Beta-1

e) Gamma-1

The retention for any class V

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The retention for any class Vrestoration is placed

a) in mesial and distal areas

b) In occlusal and gingival areas

c) At the expense of the axial wall

d) None of the above

The most effective means of providing

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p gmaximum protection against cariesactivity for a great number of people isthrough

a) Plaque control programs

b) School dental health programs

c) Meticulous brushing

d) Topical application of a solution of fluoride

e) Fluoridation of the communitys drinking waterf) A community program using pit and fissure

sealant

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Optimal amt. of fluoride for publicdrinking1 ppm

What percent is the reduction

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What percent is the reductionof caries in fluoridation:

a) 70%

b) 80%

c) 60%

d) 90%

Preparations of class I cavities for

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pthe restoration of amalgam, direct

filling gold and the gold inlay have incommon

a) Divergence of buccal and lingual wallsocclusally

b) Divergence of the mesial and distal wallsocclusally

c) Convergence of the buccal and lingualwalls occlusally

d) Undercutting the mesial and distal walls

is the discolored corroded

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_____ is the discolored, corroded,superficial layer frequently seen on

the surface of a dental amalgamrestoration.

a) Mercury

b) Gamma-2

c) Ferrous oxide

d) A sulfidee) Copper oxide

The outline form of a cavity

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The outline form of a cavitypreparation is the

a) Shape or form of the preparation aftercarious dentin has been excavated

b) Shape or form the preparation assumes

after retention form has been completed

c) Shape or form of the preparation on thesurface of the tooth

d) Next step to be accomplished in a cavitypreparation after resistance form has beenestablished.

On a carbide bur, a greater number

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, gof cutting blades results in ____

efficient cutting and a ______surfacea) less; smoother

b) Less; rougher

c) More; smoother

d) More; roughere) Less; smoother or rougher

The glass slab is chilled prior to

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The glass slab is chilled prior tomixing silicate cement powder

and liquid primarily to

a) Allow more powder to be incorporated in the

liquidb) Dissipate the heat of reaction

c) Allow greater gel formation

d) Increase the pH of the mix

e) None of the above

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Chronic dental caries differs

from acute dental caries in thata) There is greater penetration of the lesion

b) There is greater depth than width to the lesion

c) The unsupported enamel is usually fracturedaway

d) There is usually minimal sensitivity

e) A, c, d

f) B,c,d

g) All of the above

Pain following the placement of an

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g pamalgam restoration is most

frequently related toa) Heatb) Cold

c) Occlusal pressure

d) Galvanic shock

The rotational instrument which

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leaves the roughest surface on cut

tooth structure is aa) Medium grit diamond at low seed

b) Cross cut fissure bur at ultra speedc) Cross cut fissure bur at low speed

d) Garnet disc at low speed

e) Medium grit diamond at ultra speed

Stainless Steel pins are principally

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Stainless Steel pins are principallyused in conjunction with amalgam

restorations to enhance thea) Retention

b) Strength

c) Resistance form

d) All of the above

e) A and b

A minimal mercury level for amalgam

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A minimal mercury level for amalgamvaries with the brand of alloy used but

it falls within the range ofa) 40%-50%

b) 46%-53%

c) 50%-55%

d) 55%-60%

Asbestos is utilized to line a

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Asbestos is utilized to line acasting ring in order to

a) Help uniformly distribute the heatthroughout the mold

b) Facilitate venting of the moldc) Permit expansion of the mold

d) All of the above

Compared to unfilled resins

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Compared to unfilled resins,composite resins have

a) greater compressive strength

b) Less solubility

c) Greater working time

d) Smoother finished surface

e)Greater color stability

Where are the assistants feet during

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gany operative procedure when four-

handed dentistry is used?

a) On the floor

b) On the stool support

c) On the dental chair base

d) Wherever is convenient

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The cleansing property of a toothpaste

is primarily a function of itsa) Abrasivenessb) Fluoride content

c) Physical form, paste or powder

d) Binding agents

Adjustment of dietary

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j ysupplementation levels of fluoride

should be a function ofa) Age and sex

b) Age and number of permanent teethc) Race and artificial fluoridation levels of

water

d) Age and natural fluoridation levels ofwater

e) Sex and natural fluoridation of water

Which of the following properties

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gis most characteristic of the

current cement bases?

a) High coefficient of thermal expansion

b) High ductility

c) Adhesion to tooth structure

d) Low thermal conductivity

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Enamel is etched with

a) Maleic acid

b) Phosphoric acid

c) Polyacrylic acid

d) Tartaric acid

c component o t e a ent nbonding system functions primarily to

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bonding system functions primarily topenetrate through the remnant smear

layer and into the intertubular dentin toform an interpenetrating network

around dentin collagen?

a) Etchant

b) Primer

c) Adhesived) None of the above

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Hybrid layer/ resin-dentin interdiffusionzoneNakabayashi

The principal reason for using a

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The principal reason for using acavosurface bevel when preparing a

tooth for a cast gold inlay or onlay

a) To allow room for cement

b) To improve marginal adaptation

c) To compensate for shrinkage of thecasting gold alloy

d) To provide resistance form to thepreparation

What is the blade width of a

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What is the blade width of acutting instrument with the

following formula: 10-85-8-14

a) 10 mm

b) 1 mm

c) 0.85 mm

d) 0.6 mm

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4# formula

width of the blade in tenths of amillimeter

primary cutting edge angle incentigrade

blade length in millimeter

blade angle in centigrade

WALA

h f

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The retention of a pin:

a) Decreases as the diameter of the pinincreases

b) Increases as the diameter of the pin

increases

c) Increases as the diameter of the pindecreases

d) The retention of the pin has nothing todo with the diameter of the pin

The most retentive style of pin

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y pis:

a) Cemented pins

b) Friction-locked pins

c) Self-threaded pins

The optimal interpin distance depends

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The optimal interpin distance dependson the size of the pin to be used. The

minimal interpin distance is ___ forMinikin pin and _____ for minim pin.

a) 0.5mm, 2 mmb) 1.0mm, 3mm

c) 3mm, 5mm

d) 5mm, 7mm

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Rule of Thumb

Pins should be 2mm into dentin, 2mmwithin amalgam, and 1mm from the DEJ

Pins are placed parallel to the externaltooth surface

Which rubber dam frameid i f h

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provides more retraction of the

soft tissues?a) Woodbury

b) Youngs

c) Both are the same

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The pH of acidulated phosphate

fluoride (APF) gels is?a) 1-4b) 4-7

c) 7-10

d) 10-12

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pH: APF3-3.5

NaF9.2

SnF22.1-2.3

KnutsonSodium Fluoride

MuhlerStannous fluoride

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Oral Surg/Oral Diag/Radio

A sudden swelling of the lip which

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g pcomes and goes without apparent

cause is most likelya) A mucocele

b) Angioneurotic edema

c) A lymphangioma

d) A hemangioma

e) An aneurysm

The most common disorderi i b t th

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causing pain about the

masticatory apparatus includingthe TMJ is

a) Myofascial pain dysfunction

b) Trigeminal neuralgia

c) Degenerative arthritis

d) Traumatic arthritise) Temporal arteritis

Loss of tooth surface at the cervicalf t th d b t il d

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areas of teeth caused by tensile andcompressive forces during tooth

flexure is referred to as:

a) Erosion

b) Abfraction

c) Attrition

d) Abrasion

Which type of amelogenesisi f i h i d b h i

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imperfecta is characterized by having

enamel so soft that it can be removedduring a prophylaxis?

a) Type I (Hypoplastic AmelogenesisImperfecta)

b) Type II( Hypocalcified AmelogenesisImperfecta)

c) Type III (Hypomaturation AmelogenesisImperfecta)

Hypoplasticdefective formation ofl i

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enamel matrix

Hypocalcifiednormal quantity butenamel matrix has defective

mineralization

Hypomaturationimmature crystallites;

can be pierced by an explorer tip w/ firmpressure

Leukemia which accounts for about

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2/3 of cases among children is?

a) Acute lymphocytic leukemia

b) Acute myeloid leukemia

c) Chronic lymphocytic leukemia

d) Acute monoblastic leukemia

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CMLPhiladelphia chromosome (22)

AMLmalignant; hematopoieticprecursors are arrested in an early stageof developmentmyeloblast containsAUER RODS

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Surgery on the articular eminence:

a) Eminectomy

b) Condylectomy

c) Condylotomy

d) odontectomy

When was the dental x-ray

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invented?

a)1862

b)1805

c)1897

d)1895

In determining the location of IAN in

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relation to apices of teeth, _____

method is used.a) Clark shift

b) Frank shift

c) Richards method

d) paralleling

Alveoloplasty consists f the following:I Compression of the lateral walls of the

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I. Compression of the lateral walls of theextraction site

II. Removal of intraseptal bone andrepositioning of the cortical boneIII. Recontouring bony irregularities usingrongeur and bone fileIV. Gross removal of bone to increase interarchspacea) I,II,III

b) II, III, IV

c) I,III,IV

d) IV

Electromagnetic waves are:

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a) alpha

b) beta

c) gammad) cathode

Radiographic examination is useful indi i ll b t f th f ll i

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diagnosing all but one of the following

cysts.a) Globulomaxillary

b) Nasoalveolar

c) Traumatic bone

d) Follicular

e) radicular

Bony ankylosis of the TMJ is

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y ytreated by

a) steroid injections into the joint

b) Surgical procedures

c) Immobilizing jaws with wiresd) Rest, soft, diet, heat, and aspirin

e) Occlusal equilibration

Whi h f th f ll i i id d t

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Which of the following is considered to

be the normal prothrombin time (PT)a) < 7 seconds +/- 2 seconds

b) < 11 seconds +/- 2 seconds

c) < 14 seconds +/- 2 seconds

d) < 25 seconds +/- 2 seconds

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PTT: 25-36 seconds

Bleeding time: less than 9 minutes

Platelet counts: 150,000- 450,000 per 1cu mm

*50,000minimum count for oral

surgery

The propylene glycol in IVli

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valium can cause:

a) Cellulitis

b) A unilateral facial paralysis

c) Phlebitisd) syncope

The most common direction inwhich the articular disc in the

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which the articular disc in the

TMJ can be displaced is:a) Lateral

b) Medial

c) Posterior

d) Anteromedial

Which nerve is the largest of the 12

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gcranial nerves and is the principal

general sensory nerve to the head,particularly the face?

a) Vagus

b) Glossopharyngeal

c) Faciald) Trigeminal

The Caldwell-Luc procedure is done byki i i h f i l ll

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making an opening into the facial wall

of the antrum above the:

a) Maxillary tuberosity

b) Maxillary lateral incisor

c) Maxillary premolar roots

d) Maxillary third molar

More than 90% of all diagnosed

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malignant oral cancers are:

a) Squamous cell carcinoma

b) Hodgkins disease

c) Keratoacanthosisd) salivary gland tumors

How many milligrams of epinephrine

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How many milligrams of epinephrine

are in each cartridge (1.8cc) of 2%lidocaine with 1:100,000 epinephrine?

a) 0.018 mg

b) 18 mg

c) 0.036 mg

d) 36 mg

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Lidocaine : 36 mg

Epinephrine : 0.018mg

hematogenous spread of maxillaryd t i i f ti i th

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odontogenic infection via the venous

drainage of the maxilla. The causativeagent is generally:

a) Staphylococcus aureusb) Streptococci

c) Pneumococci

d) fungi

Trismus caused by an inferior alveolarinjection is the result of injecting

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injection is the result of injecting

below the mandibular foramen intothe:

a) Buccinator muscle

b) Masseter muscle

c) Temporalis muscle

d) Medial pterygoid muscle

e) Lateral pterygoid

Bifid ribs, multiple radiolucent lesionsof the jaws multiple basal cell nevi

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of the jaws, multiple basal cell nevi,

and calcification of the falx cerebri arefound in

a) Horner syndrome

b) Gardner syndrome

c) Sturge-weber syndrome

d) Basal cell nevus syndrome

e) Hereditary intestinal polyposis

Which of the following diseases is

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Which of the following diseases is

characterized by normal serumcalcium and phosphorus and elevatedserum alkaline phosphatase?

a) Osteomalacia

b) Pagets disease

c) Hyperthyroidismd) Renal rickets

e) hypoparathyroidism

A major radiographic findingi t d l d l i i

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in ectodermal dysplasia is

a) A ground-glass appearance of thebone

b) Many congenitally missing teeth

c) Calcification of the falx cerebrum

d) Hutchinsons teeth

e) osteoporosis

Some microorganisms produce adiffuse spreading inflammatory

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diffuse, spreading inflammatory

reaction due to the elaboration ofa) Coagulase

b) Bradykinin

c) Hyaluronidase

d) Peroxidase

e) Leukotaxine

Hyperplasia associated with the borderf ill fitti d t ( li

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of an ill-fitting denture(epulis

fissuratum) is most similarhistologically to

a) Papillomab) Verruca vulgaris

c) Pyogenic granuloma

d) Irritation fibroma

e) Peripheral odontogenic fibroma withcalcification

A horizontal fracture of the maxillabelow the level of the orbits is

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below the level of the orbits isclassified as a

a) Le Fort I fracture

b) Le fort II fracture

c) Le Fort III fractured) Zygomatico-maxillary complex

fracture

e) Caldwell-Luc

Masticatory space infectionshave as their hallmark

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have ____ as their hallmark.

a) Dyspnea

b) Erythema

c) Myxoedemad) Trismus

e) hematemesis

A herringbone or diamond effect will

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A herringbone or diamond effect will

appear on the processed film when:a) The film is bentb) The film is placed backwards in the

mouth

c) An improper vertical angulation isused

d) An improper horizontal angulation isused

Which of the following errors inradiographic technique is the most likely

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g p q yreason that an image on a radiograph

would appear elongated?

a) Too much vertical angulation

b) Too little vertical angulation

c) Incorrect horizontal angulation

d) Beam not aimed at the center of film

Which of the following projections isbest for examination of the condyles

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best for examination of the condylesand neck of the mandible (from an

anterior-posterior projection)

a) Waters projection

b) Transcranial projection

c) Townes projection

d) Submentovertex projection

When PID length is changed from 8 to16 inches the source to film distance is

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16 inches, the source-to-film distance is

doubled. According to the inversesquare law, the resultant beam is:

a) as intenseb) 1/8 as intense

c) 4 times as intense

d) 8 times as intense

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Target film distance

original time = original distance2

new time new distance2

Inverse square Law

original intensity = new distance2

new intensity original distance2

Sialoliths are most commonlyfound in the

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found in the

a) Sublingual

b) Submandibular duct

c) Minor salivaryd) Parotid gland

After an orthognatic procedure, thei h l d l d

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patient 24 hrs later developed a

temperature of 102F without local edemaor tenderness, the cause is likely

a) Atalectasis

b) Infected hematoma

c)Sinusitis

d) dehydration

What radiographic change in theskull may be seen in patients

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skull may be seen in patients

suffering from sickle cell anemia:a) Sunburst appearance

b) Hair on end effect

c) Punch out appearance

d) Honey comb appearance

After receiving an injection of localanesthetic containing 2% lidocaine with

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g1:100,000 epinephrine, the patient losesconsciousness. Which of the following is

the most probable cause?a) Acute toxicity

b) Allergic response

c) Syncope

d) Hyperventilation syndrome

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An incisional biopsy is indicated

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An incisional biopsy is indicated

for which of the following lesion?a) A 0.5 cm papillary fibroma of thegingiva

b) A 2.0 cm exostosis of the hard palate

c) A 2.0 cm area of fordyces disease ofthe cheek

d) A 3.0 cm hemangioma of the tonguee) A 3.0 cm area of leukoplakia of the soft

palate

Which of the following is the primary

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g p y

direction of luxation for extractingmaxillary deciduous molars?

a)Buccal

b) Palatal

c) Mesial

d) Distal

The computer tomography (CT) scanis the gold standard for evaluation

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is the gold standard for evaluation

of:a) Mandibular fractures at the angle

b) Fractures of the mandibular condyle

c) Le fort I fractures

d) Zygomatic fractures

e) All of the above

The image of the coronoid process ofthe mandible often appears in

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the mandible often appears in

periapical x-rays of:a) The incisor region of the mandible

b)The molar region of the mandible

c) The incisor region of the maxilla

d) The molar region of the maxilla

Which of the following focuses theelectrons into a narrow beam and directs

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electrons into a narrow beam and directs

the beam across the tube toward thetungsten target of the anode?

a) Copper stem

b) Filament

c) Vacuum

d) Molybdenum cup

X-ray tube

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X-ray tube

a) Cathode (-)

-tungsten filament

- molybdenum focusing cup

b) Anode (+)

- tungsten target

- copper stem

When purpura spots are verysmall they are called:

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small, they are called:

a) Pimples

b) Petechiae

c) Ecchymosesd) Varicose veins

A dentist is often consulted first bya patient with pernicious anemia

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p p

for relief ofa) Denuded gingiva

b) Glossitis

c) Edematous buccal mucosa

d) Severe gingivitis

Currently, the most popularused implants are:

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used implants are:

a) Blade form implants

b) Subperiosteal implants

c) Transosseus implantsd) Root form implants

3 categories of implants based ontheir relationship to the oral tissues:

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their relationship to the oral tissues:

1. Endosseous implants- surgically insertedinto the jawbone; most frequently usedimplant; subdivied into root form and bladeform

2. Subperiosteal implant- rides on bone

3. Transosseous implants- similar toendosseous implants but penetrate the

entire jaw; for atrophic mandible

The most commonly usedallogenic bone is?

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allogenic bone is?

a) Demineralized freeze-dried bone

b) Fresh frozen

c) Freeze-driedd) None of the above

Allogenic- tissue from same species butgenetically different individuals;

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g y ;synthetic

Autograft- tissue from the same

individual

Xenogenic- another species e.g. animals

Isograft- same species and geneticallyidentical

An endosseous dental implant has

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pbetween the bone and implant a?

a) Periodontal ligament

b) Epithelial ligament

c) Peri-implant ligament

d) A bone-implant interface

10 mm minimum bone height to placeendosseous implant

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endosseous implant

2mm minimum distance from implantto the inferior alveolar canal

2mm distance between an implant andnatural tooth

3mm- minimum distance between twoimplants

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God Bless!