Comparative in vitro study of apically extruded material after four different root canal Instrumentation techniques.
Forty newly extracted human upper central incisors were submitted to root canal instrumentation 1 mm from the apex using four different techniques: standard, step-preparation, crown-down, and ultrasound, with distilled and deionized water as the irrigating solution. The extrusion product was collected into a collecting device constructed for this purpose. Extrusion was calculated by the determination of the mass of extruded material. The step-preparation technique caused a larger amount of extrusion than the standard technique, which in turn caused greater extrusion than the crown-down and ultrasound techniques. All techniques used caused extrusion of material beyond the apical foramen.
Vansan
L P
LP
Disciplina de Endodontia, Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, Brasil.
Pécora
J D
JD
da Costa
W F
WF
Silva
R G
RG
Savioli
R N
RN
D003763:Dental Leakage / Q000209:etiology / Q000378:metabolism*; D003764:Dental Materials / Q000493:pharmacokinetics*; D006801:Humans; D066298:In Vitro Techniques; D007180:Incisor / Q000378:metabolism; D008437:Maxilla; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods*; D019227:Tooth Apex / Q000378:metabolism*
D003764:Dental Materials