牙体牙髓习题集与答案.docx
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牙体牙髓习题集与答案.docx
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牙体牙髓习题集与答案
牙体牙髓习题集与答案
一、选择题
1.对牙髓最具有破坏性的是
A.Nd激光B.CO2激光C.红激光D.光固化灯
E.牙髓活力电测定仪
2.感染根管常见的优势菌不包括
A.普氏菌B.放线菌C.G+细菌D.真杆菌E.梭形杆菌
3.备洞时易损伤牙髓的因素不包括
A.施力大B.用冷却剂
C.持续常时间钻磨D.制备深的窝洞E.不用冷却剂
4.与顽固性根尖周病变和窦道经久不愈可能有关的细菌为
A.普氏菌B.放线菌C.G+细菌D.真杆菌E.梭形杆菌
5.判断牙髓活力最可靠的检查方法是
A.热诊B.冷诊
C.牙髓活力电测定D.试验性备洞E.X线检查
6.诊断残髓炎最准确的依据是
A.叩诊
B.牙髓活力测试C.病史D.症状
E.探查治疗后根管有痛觉
7.急性根尖周脓肿最佳的排脓途径
A.从牙周间隙排脓
B.从颊、舌侧粘膜或皮肤排出C.经根管从龋洞排脓D.从上颌窦或鼻腔排脓E.以上都不对8.感染侵入牙髓组织的途径
A.深龋
B.深牙隐裂
C.深牙周袋D.重度磨耗E.以上都有可能
9.根尖周炎疼痛最剧烈的阶段是
A.粘膜下脓肿期B.骨膜下脓肿期C.浆液期
D.根尖脓肿期E.瘘管形成期
10.上颌第一磨牙的根管形态特点是:
c
A.多数是2根管,即1个颊根管和1个腭根管
B.多数是3根管,即1个近颊、1个远颊和1个腭根管C.多数是4根管,即2个近颊、1个远颊和1个腭根管D.多数是4根管,即1个近颊、2个远颊和1个腭根管E.多数是4根管,即1个近颊、1个远颊和2个腭根管11.15号标准根管锉的锉尖直径和刃部末端直径分别是:
d
A.0.10mm和0.47mmB.0.10mm和0.45mmC.0.15mm和0.45mmD.0.15mm和0.47mmE.以上都不对
12.弯曲根管预备的常见并发症是:
a
A.根管台阶
B.药物性根尖周炎C.牙周组织坏死D.皮下气肿E.误戏和误咽
13.根管预备的工作长度是指:
d
A.牙的实际长度
B.从牙冠参照点到牙本质牙釉质界C.从牙冠参照点到解剖根尖孔D.从牙冠参照点到生理根尖孔
E.从牙冠参照点到距生理根尖孔0.5~1mm14.根管成形的标准是:
a
A.根管比原来直径至少扩大3个器械号B.根尖预备到20号标准器械C.根管内无大量渗出D.根管冲洗无混浊液体E.根管内无严重气味
15.下列哪一项不是牙髓切断术的潜在并发症:
e
A.根髓感染B.根管钙化
C.内吸收D.牙髓坏死E.髓室穿孔
16.下列哪一项描述不是玻璃离子粘固剂修复术窝洞预备的特点()C
A.玻璃离子粘固剂与牙体组织有化学粘接,对固位形的要求可放宽B.不必作倒凹、鸠尾等固位形
C.去除龋坏牙本质,必须作预防性扩展D.窝洞的点、线角圆钝E.洞缘釉质不作斜面
17.深龋患者激发痛较重,洞底软龋能够彻底去净,治疗方法应选择()C
A.双层垫底,一次完成充填治疗B.局麻下开髓失活,行牙髓治疗
C.先做安抚治疗,待1~2周复诊时症状消除后,再以双层垫底充填治疗D.实行活髓切断术
E.间接盖髓、双层垫底,一次完成充填治疗
18.临床上不易查出的继发龋可用下列哪些方法帮助诊断()C
A.探诊
B.温度测验C.X线D.染色法E.麻醉法
19.深龋备洞时,下列哪项措施是错误的()AA.洞底平、侧壁直,两相垂直B.去尽腐质C.保护牙髓D.洞缘线圆钝
E.尽量保留健康牙体组织
20.复合树脂充填后脱落的原因如下,除了()A
A.制备了固位形
B.牙齿表面未注意清洁C.酸蚀后的牙面接触唾液D.未制备洞斜面E.充填体过薄
21.下列哪项不是窝洞的基本固位形(B)A.侧壁固位B.钉道固位C.倒凹固位D.鸠尾固位E.梯形固位
22.制备倒凹是为了:
(B)A.获得良好的抗力形B.获得良好的固位形C.便于垫底D.便于充填
E.便于放置盖髓剂
23.V类洞充填备洞时,要求:
(A)A.适当的固位形B.严格的抗力形C.必须做鸠尾D.口小底大E.底平壁直
24.右下颌第一恒磨牙颊面龋洞破坏越过边缘嵴至咬合面窝沟是:
(A)A.I类洞B.II类洞C.III类洞D.IV类洞E.V类洞
25.垫底的部位为:
(D)A.仅在髓壁B.仅在轴壁C.仅在侧壁
D.仅在髓壁和轴壁E.任何壁均可垫
26.下列说法正确的是BA.男性患龋率略高于女性
B.龋病流行率主要随社会经济模式而变化C.龋病流行模式依靠地理环境而改变
D.遗传因素对龋病的发生和发展产生重要的影响E.环境因素对龋病的发生和发展无影响27.釉质龋损害的4个区不包括AA.坏死区B.透明带C.暗带
D.损害体部E.釉质表面层
28.牙本质龋损在光镜下可看到微生物渗透至牙本质小管的区域是BA.坏死区B.感染层
C.牙本质脱矿区D.硬化区
E.修复性牙本质层29.静止龋属于BA.急性龋B.慢性龋C.继发龋D.牙釉质龋E.牙骨质龋
30.病程进展快,多数牙在短期内同时患龋的急性龋称为E
A.湿性龋B.慢性龋C.干性龋D.继发龋E.猛性龋
31WhichisthebestwayofpaincontrolforendodontictreatmentA.LocalanestheticsB.DevitalizationC.Analgesics
D.OcclusalreductionE.Incisinganddrainage
32Whichoneisnotthereasonforuseofrubberdam
A.ProtectaspirationorswallowingofinstrumentsorirrigantsB.EliminatethedentalfearofpatientsC.Improvevisibility
D.Reducedriskofcross-contaminationE.Legalconsiderations
33Thefollowingstatementsarecorrectexcept
A.Nearlyallcanalsexhibitacertaindegreeofcurvature.B.Theremaybemorethanonecanalswithinoneroot.C.Theapicalforamenusuallyopensattheanatomicalapex.
D.Apicalconstrictionoccursat0.5~1mmfromtheapicalforamen.E.Lateralandaccessorycanalsmightbethecauseoftreatmentfailure.
34WhichoneiswrongregardingtheprincipleofaccesscavityAStraight-lineaccess
BConservationoftoothstructure
CUnroofingofthechamberandexposureofpulphornsDFacialsurfaceofanteriorteethEOcclusalsurfaceofposteriorteeth
35Theadvantagesofgutta-perchaasafillingmaterialare
A.Itiscompactibleandadaptsexcellentlytotheirregularitiesandcontourofthe
canal
B.Itisradiopaque
C.Itcanbeeasilyremovedfromthecanalwhennecessary
D.ItcanbesoftenedandmadeplasticbyheatorbyorganicsolventsE.Alloftheabove
36Whichoneisincorrectaboutthecriteriaoftherootcanalisreadytobefilledafter
thecompletionofrootcanalcleaningandshaping?
A.Thetoothisasymptomatic.
B.Thecanaliswet.
C.Thereisnosinustract.D.Thereisnofoulodor.
E.Thetemporaryfillingisintact
37Whichoneisnotthepathwaysofpulpalandperiapicalinfections?
A.DentinaltubulesB.PulpexposureC.Gingival
D.PeriodontalligamentE.Anachoresis
38Tug-backisachievedandthecanalisreadyforfillingA.Whenthegutta-perchahasextendedbeyondtheapex
B.Whenthegutta-perchaiseasilyremovedfromtherootcanal
C.Whenthegutta-perchaplacedtoapicalconstrictionexhibitsresistanceon
removal
D.AftercementationE.Noneofabove
39MostrootcanalinfectionsinvolveA.asingleobligateanaerobicspeciesB.multipleanaerobicspeciesonly
C.mixedaerobicandanaerobicmicroorganismsD.multipleaerobicspeciesonlyE.noneofabove
40Anabnormallyshapedtooththatmayappearasanextrawidecrown,anormal
crownwithanextraroot,orothercombinationsresultingfromtheunionoftwoadjacenttoothgermsbydentinduringdevelopmentiscalledA.fusedteeth
B.concresenceofteethC.geminatedteethD.dilacerationsoftoothE.taurodontism
41Whichisn’tthenon-operativetreatmentofdentalcariesinthefollowing?
A.applicationoffluorideB.applicationofAPFgelC.remineralizativetherapyD.enameloplasty
E.pitandfissuresealing
42Whichisnottheaimofoperativetherapyonthedentalcariesmanagement?
A.ToremoveinfecteddentineandprohibitcariesB.ToprotectthepulpandavoidpainC.ToenhancethestrengthofthetoothD.Tofacilitateplaquecontrol
E.Torestoretheappearance(ofteeth)anditsfunction
43Whichisthebeststatementaboutresistanceform
A.Resistanceformisthedesignofacavityinsuchawaythattheremainingtooth
substanceandtherestorativematerialcanwithstandmasticatorystress
B.Thebulkrequiredwilldependontheflexuralstrengthofrestorativematerial.In
thecaseofamalgamitisestimatedthataminimumof1.5-2mmthicknessoftherestorativematerialisrequiredtowithstandmasticatorystress
C.Ifamarginalridgeisfoundtobetooweakinthecauseofanocclusalcavity
preparation,aClassIIcavitymayhavetobepreparedinstead,soastoeliminatetheweakmarginalridge.Thisisparticularlyindicatedwheretheridgeisonlyofenamelthicknessandunsupportedbysounddentine
D.Thecavityshouldbedesignedthattheocclusalmarginsofthecavityareinareas
notsubjectedtoexcessiveocclusaltrauma,otherwisetheenamelwallofthecavityand/orthemarginsoftherestorativematerialmayfracture.Inpractice,thismaybeachievedbyplacinganocclusalmarginsofacavityaboutone-quarter(1/4)oftheintercuspaldistance.Note,thateffortsshouldalwaysbemadetoconservesoundtoothtissueE.Alloftheabove
44Whichisthemostdangerareaoftoothindentalcariesoccurredafteryouhavelearneddentalcaries?
A.PitsandfissuresonocclusalsurfacesofmolarsandpremolarsB.Approximalsurfacesofallteeth.
C.Gingivalthirdsofallteeth,bothonfacialandlingualsurfaces
D.Pitsandfissuresnearthelingualofmaxillaryincisorsandcanines(lingualpits)E.Pitsandfissuresonthebuccalofmolars
45Whichisnottrueinthefollowingstatementaboutdentalcariesandmicro-organisms?
A.Cariescouldbeinducedbyspecificbacteria,especiallymutans
streptococci-group(eg.StreptococcusmutansandStrep.sobrinus).
B.Therearecariesoccurredwhenonlyfedacariogenic(highsucrose)diet.
C.Inthe’60sKeyesinfectedgerm-freeanimalswithknownstrainsofstreptococci
andfoundthattheseorganismsweretransferredtouninfectedlittermateswhothenbecamesusceptibletocaries.Hethusdemonstratedthatdentalcarieswaspotentiallyinfectiousandtransmissible.
D.Whentalkingaboutcariogenicmicroorganisms,weoftenrefertoStreptococcus
mutans,LactobacillusandActinomyces.
E.Occlusalcariescouldbepreventedusingpenicillininanimalstudy.
46Theadvantagesglass-ionomercementincludeA.highadhesionpropertiesB.lowabrasionproperties
C.useasapermanentrestoration
D.reductionincariesduetofluoridereleasingpropertiesE.alloftheabove
47WhichoneofthestatementsiserrorinretentivepinplacementA.beavoidedbifurcationandtrifurcationareasB.paralleltotheexternalsurfaceofthetooth
C.manypinholesbebetterplacedindifferentplanes
D.thelengthofpinindentineshouldbelongerthanthatofinrestorationE.beinthehardestdentine
48ThereasonsofspontaneouspainaftertoothfillingincludeA.mistakenlyjudgetheconditionofpulpB.neglectsmallpulpexposureC.irritationofmaterialstopulpD.residualcariousdentineE.alloftheabove
49Whichofthefollowingisacontra-indicationtoendodontictreatmentA.DiabetesB.Pregnancy
C.HIV-infectedpatients
D.Patientsufferingfromheartattackwithinpast6monthsE.Cancer
50CentralcuspismostcommoninA.maxillarythesecondpremolarsB.maxillarythefirstpremolarsC.mandibularthefirstpremolarsD.mandibularthesecondpremolarsE.maxillarythesecondmolars
51SubmergeddeciduousteethoccursmostcommoninA.primarymaxillarythesecondmolarsB.primarymaxillarythefirstmolarsC.primarycentralincisors
D.primarymandibularthesecondmolarsE.primarymandibularthefirstmolars
52Inclinicalassessment,whichisnotcorrect?
A.SpontaneousdiscomfortatnightprovideaclueasthetoothisinflamedB.Vitalometertestsareveryunreliable
C.Ifthetoothisexcessivelymobile,itmayhaveabnormalrootresorptionD.SwellingorwithafistuloustractisindicativeofanecroticpulpE.Nopainhistoryaffirmednoinflammation
53Ifyoumechanicallyexposethemesiobuccalpulphornontheprimarymaxillary
firstmolar.Thecariouslesiononthemesialanddistalsurfacesismode
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