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NDAEB Exam Prep with 100- correct answers
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NDAEB Exam Prep with 100% correctanswers
What two basic methods are used to acquire a digital x-ray image? - ANSWER: ✔
nn nn nn nn nn nn nn nn nn nn nn nn nn nn
Direct imaging(sensor) & indirect imaging(PSP)
nn nn nn nn nn
Advantages nnof nnDigital nnRadiography nn- nnANSWER: nn✔ nnImmediate nnviewing nnof nnimages, nnless
nnradiation, nnno nnchemicals, nnability nnto nnenhance nnimages, nncommunication nnwith nnother nndentists, nnno
nnmore nnlost nnfilms, nnremote nnconsultation nncapability
Disadvantages nnof nnDigital nnRadiography nn- nnANSWER: nn✔ nnCost, nnconverting nnprevious nnrecords nnto
nndigital, nnlearning nnthe nncomputer nnsoftware, nnthickness nnand nnrigidity nnof nnsensors, nninfection nncontrol
What nnis nnintraoral nnfilm nncomposed nnof? nn- nnANSWER: nn✔ nnFilm nnBase nn- nnClear nnCellulose nnAcetate
Thin nnAdhesive nnLayer
Silver nnHalide nnCrystals nn- nnabsorb nnradiation
A nnprotective nnlayer nnto nnprotect nnthe nnemulsion nnsurface.
What nnis nna nnlatent nnimage? nn- nnANSWER: nn✔ nnThe nnimage nnon nnthe nnfilm nnthat nnis nnnot nnyet nnvisible
nnbecause nnit nnhas nnnot nnbeen nnprocessed.
What nndoes nn'film nnspeed' nnrefer nnto? nn- nnANSWER: nn✔ nnThe nnamount nnof nnradiation nnthat nnis nnrequired
nnto nnproduce nna nnradiograph nnof nnstandard nndensity.
True nnor nnfalse: nnThe nnlarger nnthe nnsilver nnhalide nncrystals, nnthe nnfaster nnthe nnfilm nnspeed? nn- nnANSWER:
nn✔ nnTrue
What nnis nnthe nnfastest nnfilm nnspeed nncurrently nnavailable? nn- nnANSWER: nn✔ nnF-Speed. nn(It nnreduces
nnpatient nnexposure nnto nnradiation nnby nn20-60% nncompared nnto nnE nnor nnD nnspeed nnfilm)
,What nnare nnthe nn3 nntypes nnof nnx-ray nnfilm nnused nnin nndental nnradiography? nn- nnANSWER: nn✔ nnIntraoral
nnfilm, nnextraoral nnfilm, nnand nnduplicating nnfilm.
When nndoes nna nn"Herringbone" nnpattern nnoccur nnon nndental nnfilm? nn- nnANSWER: nn✔ nnWhen nnit nnis
nnplaced nnin nnthe nnmouth nnbackwards.
What nnare nnthe nn5 nnbasic nnsizes nnthat nnintraoral nnfilm nncomes nnin? nn- nnANSWER: nn✔ nnChild nnSize: nn0
Narrow nnAnterior: nn1
Adult nnSize: nn2
Preformed nnbitewing: nn3 nn(infrequently nnused)
Occlusal: nn4
What nnare nntwo nncommon nnextraoral nnradiographs nntaken? nn- nnANSWER: nn✔ nnPanoramic nnand
nnCephalometric.
What nnis nnan nnintensifying nnscreen? nn- nnANSWER: nn✔ nnA nndevice nnthat nnintensifies nnor nnincreases nnthe
nneffect nnof nnradiation nnand nnthus nndecreases nnthe nnamount nnof nnexposure nntime nnneeded. nnIt nnis nncoated
nnwith nnphosphor nnwhich nngives nnoff nnlight nnwhen nnstruck nnby nnx-radiation.
What nnare nnthe nn5 nnsteps nnin nnprocessing nnfilm? nn- nnANSWER: nn✔ nn1. nnDeveloping nn(reduce nnthe nnsilver
nnhalide nncrystals nninto nnblack nnmetallic nnsilver)
2. nnRinsing nn(remove nndeveloper nnfrom nnfilm)
3. nnFixing. nn(use nnan nnacidic nnsolution nnto nnremove nnunexposed nnsilver nnhalide nncrystals)
4. nnWashing nn(wash nnthe nnfilm)
5. nnDrying
What nnare nnthe nntwo nntechniques nnthat nncan nnbe nnused nnfor nnexposing nnintraloral nnimages? nn- nnANSWER:
nn✔ nnBisecting nn& nnParalleling
5 nnBasic nnRules nnof nnthe nnParalleling nnTechnique nn- nnANSWER: nn✔ nn1. nnPlacement: nnit nnmust nncover
nncorrect nnteeth nnto nnbe nnexamined
,2. nnPosition: nnit nnmust nnbe nnparallel nnto nnthe nnlong nnaxis nnof nnthe nntooth.
3. nnVertical nnAngulation: nnCentral nnray nnmust nnbe nndirected nnperpendicular nnto nnthe nnreceptor nn& nntooth.
4. nnHorizontal nnAngulation: nnCentral nnray nnmust nnbe nndirected nnthrough nnthe nncontact nnareas.
5. nnCentral nnRay: nnit nnmust nnbe nncentered nnon nnthe nnreceptor.
Why nnis nnit nnimportant nnto nnhave nnan nn'exposure nnsequence' nnfor nnreceptor nnplacement? nn- nnANSWER: nn✔
nnTo nnensure nnan nnarea nnis nnnot nnomitted nnor nnexposed nntwice.
What nnoccurs nnif nnthe nnhorizontal nnangulation nnis nnincorrect? nn- nnANSWER: nn✔ nnOverlapping nnof nnteeth.
What nntwo nnerrors nncan nnoccur nnif nnthe nnvertical nnangulation nnis nnincorrect? nn- nnANSWER: nn✔
nnForeshortened nnor nnelongated nnimages.
What nnqualities nnmust nnan nnendodontic nnx-ray nnhave? nn- nnANSWER: nn✔ nnTooth nncentered nnon nnthe nnimage
At nnleast nn5mm nnof nnbone nnvisible nnbeyond nnapex nnof nnthe nntooth
The nnimage nnis nnas nnanatomically nnaccurate nnas nnpossible
Two nnmethods nnof nnmounting nnradiographs nnare: nn- nnANSWER: nn✔ nn1. nnLabial nnmounting nnmethod:
nnradiographs nnplaced nnin nnthe nnmount nnwith nnthe nnraised nndots nnfacing nnup nn(as nnif nnthe nnviewer nnis
nnlooking nndirectly nnat nnthe nnpt)
2. nnradiographs nnplaced nnin nnthe nnmount nnwith nnthe nnraised nndots nnfacing nndown nn(as nnif nnthe nnviewer nnis
nninside nnthe nnpatients nnmouth nnlooking nnout)
Two nntypes nnof nnpanoramic nnmachines nnare nnin nnuse nntoday: nn- nnANSWER: nn✔ nnFilm-based nnimaging nn&
nndirect nndigital nnimaging. nnThe nnmain nndifference nnis nnthe nnimage nnreceptor, nndigital nnunits nnuse nna
nnsensory nnarray nnrather nnthan nnfilm.
What nnis nnCone nnBeam nnComputed nnTomography? nn- nnANSWER: nn✔ nnUse nnof nna nncone-shaped nnx-ray
nnbeam nnto nnacquire nnthree-dimensional nninformation.
, What nnis nna nnfilm nngrid? nn(used nnfor nnextraoral nnimaging) nn- nnANSWER: nn✔ nnIt nnis nnused nnto nnreduce nnthe
nnamount nnof nnscatter nnradiation nnthat nnreaches nnan nnextraoral nnfilm nnduring nnexposure.
What nnis nna nnLateral nnCephalometric nnProjection nnused nnfor? nn- nnANSWER: nn✔ nnUsed nnto nnevaluate nnfacial
nngrowth nnand nndevelopment, nntrauma, nndisease, nnand nndevelopmental nnabnormalities. nnIt nnshows nnthe
nnbones nnof nnthe nnface nnand nnskull nnas nnwell nnas nnthe nnsoft nntissue nnprofile.
What nnis nna nnPosteroanterior nnProjection nnused nnfor? nn- nnANSWER: nn✔ nnUsed nnto nnevaluate nnfacial
nngrowth nnand nndevelopment, nntrauma, nndisease, nnand nndevelopment nnabnormalities. nnIt nnshows nnthe
nnfrontal nnand nnethmoid nnsinuses, nnthe nnorbits, nnand nnthe nnnasal nncavities.
What nnhappens nnif nna nnpatient nndoes nnnot nnremove nnjewellery nnor nnmetallic/radiodense nnobjects nnfrom
nntheir nnhead/neck? nn- nnANSWER: nn✔ nnGhost nnimages
If nna nnlead nnapron nnis nnincorrectly nnplaced nnon nna nnpt nnduring nna nnpanoramic nnradiograph, nnwhat nnoccurs?
nn- nnANSWER: nn✔ nn"Lead nnApron nnArtifact" nna nnradiopaque nncone-shaped nnartifact nnresults.
What nnhappens nnif nna nnpatient's nnchin nnis nnpositioned nntoo nnhigh nnduring nna nnpan? nn- nnANSWER: nn✔ nnIt
nnwill nncreate nna nn"reverse nnsmile nnline"
What nnhappens nnif nna nnpatient's nnchin nnis nnpositioned nntoo nnlow nnduring nna nnpan? nn- nnANSWER: nn✔ nnIt
nnwill nncreate nnan nn"exaggerated nnsmile nnline"
What nnare nnthree nntypes nnof nnstress nnand nnstrain? nn- nnANSWER: nn✔ nnTensile nnstress: nnpulls nnand nnstretches
nna nnmaterial nnEx. nntug-of-war
Compressive nnstress: nnpushes nna nnmaterial nntogether. nnex. nnchewing
Shear nnstress: nnthe nnbreakdown nnof nnmaterial nnas nnthe nnresult nnof nnsomething nnsliding nnover nntwo nnareas.
nnex. nncutting nnwith nnscissors.
What nnis nnamalgam nnalloy nnpowder nncomposed nnof? nn- nnANSWER: nn✔ nnSilver nn- nngives nnit nnits nnstrength.
Tin nn- nngives nnit nnworkability nnand nnstrength.
Copper nn- nngives nnit nnstrength nnand nnresistance nnto nncorrosion.
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