Effect of passive ultrasonic agitation during final irrigation on cleaning capacity of hybrid instrumentation
Vinhorte Marcilene Coelho, Suzuki Eduardo Hideki, de Carvalho Maira Sousa, Marques Andre Augusto Franco, Junior Emilio Carlos Sponchiado, Garcia Lucas da Fonseca Roberti,
소속 상세정보
( Vinhorte Marcilene Coelho ) - Amazonas State University School of Dentistry Department of Endodontics
( Suzuki Eduardo Hideki ) - Amazonas State University School of Dentistry Department of Endodontics
( de Carvalho Maira Sousa ) - Federal University of Amazonas School of Dentistry Department of Endodontics
( Marques Andre Augusto Franco ) - Amazonas State University School of Dentistry Department of Endodontics
( Junior Emilio Carlos Sponchiado ) - Federal University of Amazonas School of Dentistry Department of Endodontics
( Garcia Lucas da Fonseca Roberti ) - University of Sao Paulo Ribeirao Preto School of Dentistry Department of Dental Materials and Prosthodontics
KMID : 1034420140390020104
Abstract
Objectives: To evaluate the effect of passive ultrasonic agitation on the cleaning capacity of a hybrid instrumentation technique.
Materials and Methods: Twenty mandibular incisors with mesiodistal-flattened root shape had their crowns sectioned at 1 mm from the cementoenamel junction. Instrumentation was initiated by catheterization with K-type files (Denstply Maillefer) #10, #15, and #20 at 3 mm from the working length. Cervical preparation was performed with Largo bur #1 (Dentsply Maillefer) followed by apical instrumentation with K-type files #15, #20 and #25, and finishing with ProTaper F2 file (Denstply Maillefer). All files were used up to the working length under irrigation with 1 mL of 2.5% sodium hypochlorite (Biodynamica) at each instrument change. At the end of instrumentation, the roots were randomly separated into 2 groups (n = 10). All specimens received final irrigation with 1 mL of 2.5% sodium hypochlorite. The solution remained in the root canals in Group 1 for one minute; and ultrasonic agitation was performed in Group 2 for one minute using a straight tip inserted at 1 mm from working length. The specimens were processed histologically and the sections were analyzed under optic microscope (×64) to quantify debris present in the root canal.
Results: The samples submitted to ultrasonic agitation (Group 2) presented significant decrease in the amount of debris in comparison with those of Group 1 (p < 0.05).
Conclusions: The hybrid instrumentation technique associated with passive ultrasonic agitation promoted greater debris removal in the apical third of the root canals.
키워드
Ni-Ti; ProTaper; Sodium hypoclorite; Ultrasonic
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