整理牙体牙髓习题集与答案.docx

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整理牙体牙髓习题集与答案.docx

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整理牙体牙髓习题集与答案.docx

整理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

Nd激光

CO2激光

红激光

光固化灯

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：

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：

A.0.10mm和0.47mm

B.0.10mm和0.45mm

C.0.15mm和0.45mm

D.0.15mm和0.47mm

E.以上都不对

12．弯曲根管预备的常见并发症是：

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：

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0.5~1mm

14．根管成形的标准是：

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：

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（）A

A.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．

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）

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B

A.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A

A.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B

A.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B

A.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

31Whichisthebestwayofpaincontrolforendodontictreatment

A.Localanesthetics

B.Devitalization

C.Analgesics

D.Occlusalreduction

E.Incisinganddrainage

32Whichoneisnotthereasonforuseofrubberdam

A.Protectaspirationorswallowingofinstrumentsorirrigants

B.Eliminatethedentalfearofpatients

C.Improvevisibility

D.Reducedriskofcross-contamination

E.Legalconsiderations

33Thefollowingstatementsarecorrectexcept

A.Nearlyallcanalsexhibitacertaindegreeofcurvature.

B.Theremaybemorethanonecanalswithinoneroot.

C.Theapicalforamenusuallyopensattheanatomicalapex.

D.Apicalconstrictionoccursat0.5~1mmfromtheapicalforamen.

E.Lateralandaccessorycanalsmightbethecauseoftreatmentfailure.

34Whichoneiswrongregardingtheprincipleofaccesscavity

AStraight-lineaccess

BConservationoftoothstructure

CUnroofingofthechamberandexposureofpulphorns

DFacialsurfaceofanteriorteeth

EOcclusalsurfaceofposteriorteeth

35Theadvantagesofgutta-perchaasafillingmaterialare

A.Itiscompactibleandadaptsexcellentlytotheirregularitiesandcontourofthecanal

B.Itisradiopaque

C.Itcanbeeasilyremovedfromthecanalwhennecessary

D.Itcanbesoftenedandmadeplasticbyheatorbyorganicsolvents

E.Alloftheabove

36Whichoneisincorrectaboutthecriteriaoftherootcanalisreadytobefilledafterthecompletionofrootcanalcleaningandshaping?

A.Thetoothisasymptomatic.

B.Thecanaliswet.

C.Thereisnosinustract.

D.Thereisnofoulodor.

E.Thetemporaryfillingisintact

37Whichoneisnotthepathwaysofpulpalandperiapicalinfections?

A.Dentinaltubules

B.Pulpexposure

C.Gingival

D.Periodontalligament

E.Anachoresis

38Tug-backisachievedandthecanalisreadyforfilling

A.Whenthegutta-perchahasextendedbeyondtheapex

B.Whenthegutta-perchaiseasilyremovedfromtherootcanal

C.Whenthegutta-perchaplacedtoapicalconstrictionexhibitsresistanceonremoval

D.Aftercementation

E.Noneofabove

39Mostrootcanalinfectionsinvolve

A.asingleobligateanaerobicspecies

B.multipleanaerobicspeciesonly

C.mixedaerobicandanaerobicmicroorganisms

D.multipleaerobicspeciesonly

E.noneofabove

40Anabnormallyshapedtooththatmayappearasanextrawidecrown,anormalcrownwithanextraroot,orothercombinationsresultingfromtheunionoftwoadjacenttoothgermsbydentinduringdevelopmentiscalled

A.fusedteeth

B.concresenceofteeth

C.geminatedteeth

D.dilacerationsoftooth

E.taurodontism

41Whichisn’tthenon-operativetreatmentofdentalcariesinthefollowing?

A.applicationoffluoride

B.applicationofAPFgel

C.remineralizativetherapy

D.enameloplasty

E.pitandfissuresealing

42Whichisnottheaimofoperativetherapyonthedentalcariesmanagement?

A.Toremoveinfecteddentineandprohibitcaries

B.Toprotectthepulpandavoidpain

C.Toenhancethestrengthofthetooth

D.Tofacilitateplaquecontrol

E.Torestoretheappearance（ofteeth）anditsfunction

43Whichisthebeststatementaboutresistanceform

A.Resistanceformisthedesignofacavityinsuchawaythattheremainingtoothsubstanceandtherestorativematerialcanwithstandmasticatorystress

B.Thebulkrequiredwilldependontheflexuralstrengthofrestorativematerial.Inthecaseofamalgamitisestimatedthataminimumof1.5-2mmthicknessoftherestorativematerialisrequiredtowithstandmasticatorystress

C.Ifamarginalridgeisfoundtobetooweakinthecauseofanocclusalcavitypreparation,aClassIIcavitymayhavetobepreparedinstead,soastoeliminatetheweakmarginalridge.Thisisparticularlyindicatedwheretheridgeisonlyofenamelthicknessandunsupportedbysounddentine

D.Thecavityshouldbedesignedthattheocclusalmarginsofthecavityareinareasnotsubjectedtoexcessiveocclusaltrauma,otherwisetheenamelwallofthecavityand/orthemarginsoftherestorativematerialmayfracture.Inpractice,thismaybeachievedbyplacinganocclusalmarginsofacavityaboutone-quarter（1/4）oftheintercuspaldistance.Note,thateffortsshouldalwaysbemadetoconservesoundtoothtissue

E.Alloftheabove

44Whichisthemostdangerareaoftoothindentalcariesoccurredafteryouhavelearneddentalcaries?

A.Pitsandfissuresonocclusalsurfacesofmolarsandpremolars

B.Approximalsurfacesofallteeth.

C.Gingivalthirdsofallteeth,bothonfacialandlingualsurfaces

D.Pitsandfissuresnearthelingualofmaxillaryincisorsandcanines（lingualpits）

E.Pitsandfissuresonthebuccalofmolars

45Whichisnottrueinthefollowingstatementaboutdentalcariesandmicro-organisms?

A.Cariescouldbeinducedbyspecificbacteria,especiallymutansstreptococci-group（eg.StreptococcusmutansandStrep.sobrinus）.

B.Therearecariesoccurredwhenonlyfedacariogenic（highsucrose）diet.

C.Inthe’60sKeyesinfectedgerm-freeanimalswithknownstrainsofstreptococciandfoundthattheseorganismsweretransferredtouninfectedlittermateswhothenbecamesusceptibletocaries.Hethusdemonstratedthatdentalcarieswaspotentiallyinfectiousandtransmissible.

D.Whentalkingaboutcariogenicmicroorganisms,weoftenrefertoStreptococcusmutans,LactobacillusandActinomyces.

E.Occlusalcariescouldbepreventedusingpenicillininanimalstudy.

46Theadvantagesglass-ionomercementinclude

A.highadhesionproperties

B.lowabrasionproperties

C.useasapermanentrestoration

D.reductionincariesduetofluoridereleasingproperties

E.alloftheabove

47Whichoneofthestatementsiserrorinretentivepinplacement

A.beavoidedbifurcationandtrifurcationareas

B.paralleltotheexternalsurfaceofthetooth

C.manypinholesbebetterplacedindifferentplanes

D.thelengthofpinindentineshouldbelongerthanthatofinrestoration

E.beinthehardestdentine

48Thereasonsofspontaneouspainaftertoothfillinginclude

A.mistakenlyjudgetheconditionofpulp

B.neglectsmallpulpexposure

C.irritationofmaterialstopulp

D.residualcariousdentine

E.alloftheabove

49Whichofthefollowingisacontra-indicationtoendodontictreatment

A.Diabetes

B.Pregnancy

C.HIV-infectedpatients

D.Patientsufferingfromheartattackwithinpast6months

E.Cancer

50Centralcuspismostcommonin

A.maxillarythesecondpremolars

B.maxillarythefirstpremolars

C.mandibularthefirstpremolars

D.mandibularthesecondpremolars

E.maxillarythesecondmolars

51Submergeddeciduousteethoccursmostcommonin

A.primarymaxillarythesecondmolars

B.primarymaxillarythefirstmolars

C.primarycentralincisors

D.primarymandibularthesecondmolars

E.primarymandibularthefirstmolars

52Inclinicalassessment,whichisnotcorrect?

A.Spontaneousdiscomfortatnightprovideaclueasthetoothisinflamed

B.Vitalometertestsareveryunreliable

C.Ifthetoothisexcessivelymobile,itmayhaveabnormalrootresorption

D.Swellingorwithafistuloustractisindicativeofanecroticpulp

E.Nopainhistoryaffirmednoinflammation

53Ifyoumechanicallyexposethemesiobuccalpulphornontheprimarymaxillaryfirstmolar.T

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