2种根管预备器械对感染根管清洁能力的扫描电镜观察

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1、中文摘要在根冠l／3，两者的清洁效果则无显著性差异(P>o．05)。结论：ProTaper镍钛机用器械在根备过程中对根尖l／3和根中1／3根管壁的清洁能力强于手用器械，对根冠1／3的清洁能力两者无明显差别。关键词：根备器械；ProTaper；根管预备；扫描电镜；玷污层英文摘要TheSEMObservationoftheAbilitytoCleantheInfectedRootCanalbytwoRootCanalPreparedInstrumentsABSTRACTPulpitisandperiapicalperiodontitisar

2、ethecommonlyandfrequently．occurringdiseasesinStomatologicalDepartment，whiletherootcanaltherapyisthepreferredmethodtothetreatmentofpulpitisandperiapicalperiodontitis．Cleantherootcanalpulpinflammationandnecrosisofrootcanalcompletely，formrootcanalproperly,thendisinfectthero

3、otcanal．fillittightlytoremovetheinfectedrootcanalcontentsonperiapicaltissueofthenegativestimulus，topreventtheoccurrenceofperiapicalperiodontitisorpromotethehealingoftheperiapicalperiodontitis．RootcanalpreparationisthekeytoSuccessofrootcanaltherapy，theeffectofitistocheana

4、ndshapetherootcanal．Theprocessmainlyreliesontheequipmentstocomplete．Therefore，theequipmentusedinrootcanalpreparationiSveryimportant．Withthedevelopementoftechnology，rootcanalpreparationinstrumentsalsohasmadereplacement．Stainlessinstruments，asthetraditionalinstruments，have

5、greaterrigidity，theflexibilitydecreasewiththeincreasingofthediameterofequipment，alsoitcouldleadtodeviationofrootcanaleasilyandformthebench．Inrecentyears．thereisanewtypeofinstrumentsnamednickel—titaniumrootcanalpreparationinstruments，whichisa”shapememoryalloys"withhighcut

6、tingefjEiciency．goodanti．reverseandultra-flexiblefeatures．Nickel-titaniumrootcanalpreparationinstrumentshavetwokindswhicharehandandrotary．ProTaperiSanewnickel—titaniuminstrumentsofrootcanalpreparation，itiscomposedbysixfiles，includingthreeshapefiles(Sx，SI，S2)andthreecompl

7、etefiles(Fl'F2，F3)．ThedesignofhandandrotaryProTapernickel．titaniumfileiSexactlythesame．Rotaryinstrumentsusedadedicatedvariablespeedmotorwithhigh—torque，whichisatthespeedof150"-"350r／mingenerally．4英文摘要Objective：Theprocessofrootcanalpreparationcanproducesmearlayer．Smearlay

8、erisduetothedeformationoftoothtissueelasticandplastic，becauseoflocal．heatandshearforceintheprocessofcut