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1、三种机用镰钛器械预备重度弯曲根管的临床评价贾卫青I,刘继红2,王慧茹I（030006山西太原武警山西总队医院口腔科）【摘要】目的评价ProTaper,Mtwo,K3三种机用鎳钛器械预备重度弯曲根管的临床疗效。方法选取患有牙髓炎或根尖周炎的、有重度弯曲根管的磨牙90颗，随机分为三组，分别使用机用银钛器械ProTaper,Mtwo,K3预备根管，其中Mtwo组采用单一长度技术预备,其余两组采用冠根向深入法预备，三组均采用侧压充填法充填根管。根据治疗前后的X线片评价根管预备效果以及根充效果，比较根管预备时间，术后疼痛，器械折断
2、数量。使用SPSS13.0软件包进行统计分析，根管弯曲度和操作时间的比较用》检验，根管偏移、器械折断和术后疼痛的发生用％?检验。结果机用鎳钛器械能较好地维持重度弯曲根管的弯曲度和走向，Mtwo组未出现根管偏移，ProTaper和K3组各有1例根管偏移；ProTaper和Mtwo组各有1例发生器械折断；Mtwo组有1例出现术后疼痛；Mtwo的操作时间较ProTaper和K3短。结论3种机用银钛器械预备重度弯曲根管效率高，成形效果好，且较少有根管内并发症发生。Mtwo系统采用单一长度技术预备更简单，预备时间短且有效，但临床操
3、作中须注意预防器械折断和术后疼痛的发生。【关键词】单一长度技术；冠根向深入法；根管预备；机用謀钛器械Clinicaleffectofthreekindsofnickel-titaniumrotaryinstrumentonpreparingseverelycurvedcanalsJiaWeiqing,LiuJihong,WangHuiru(DentistryofShanxiArmedPoliceCorpsHospital,Taiyuan030006)[Abstract1ObjectiveToevaluateclinica
4、leffectsofthreetypesofnickel-titaniumrotaryinstrumentsonpreparingseverelycurvedcanals・MethodsNintyteethwithcurvedrootcanalsneedtobetreatedforpulpalorperiapicalinvolvement,wererandomlydividedintothreegroups,wereinstrumentedbyProTaper,MtwoandK3・Allteethwereobturate
5、dbylateralcompactiontechnique・Treatmenteffectandobturatedeffectofthreegroupswereevaluatedaccordingtopre-andpost-operativeX-rayfilms.Thetimeforrootcanalpreparation,complicationafterrootcananlpreparation,numberofbrokeninstrumentswerecompared・Allstatisticalanalysisw
6、asperformedusingSPSS13.0softwarepackage・Dataofrootcanalcurvaturesandpreparationtimewascomparedusingttest;theincidenceofcomplicationsofrootcanaltreatmentandpostoperativepainwasanalyzedusingChi-squaretest.ResultsTheNiTirotaryinstrumentscouldkeepthecurvatureandflowo
7、fcurvedcanalsverywell.TherewasonetransportationinProTaperandK3groupseparately.TworotaryinstrumentsfracturedinProTaperandMtwogroup.PostoperativepainseldomoccurredinMtwogroup・TheoperativetimewasshorterforMtwothanthatofProTaperandK3・ConclusionWiththeNiTirotaryinstru
8、ments,ProTaper,MtwoandK3,curvedrootcanalscanbepreparedeffectivelyandquickly.TheMtwoinstrumentismucheasierandfasterduringpreparationwithsinglelengthtechnology;h
