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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evaluation of Different Passive Ultrasonic Irrigation Protocols on the Removal of Dentinal Debris from Artificial Grooves

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Author(s):
Rodrigo Ricci Vivan [1] ; Jussaro Alves Duque [2] ; Murilo Priori Alcalde [3] ; Marcus Vinicius Reis Só [4] ; Clóvis Monteiro Bramante [5] ; Marco Antonio Hungaro Duarte [6]
Total Authors: 6
Affiliation:
[1] Universidade de São Paulo - Brasil
[2] Universidade de São Paulo - Brasil
[3] Universidade de São Paulo - Brasil
[4] Universidade Federal Rio Grande do Sul - Brasil
[5] Universidade de São Paulo - Brasil
[6] Universidade de São Paulo - Brasil
Total Affiliations: 6
Document type: Journal article
Source: Brazilian Dental Journal; v. 27, n. 5, p. 568-572, 2016-10-00.
Abstract

Abstract The aim of this study was to evaluate the influence of different passive ultrasonic irrigation protocols on the removal of debris in artificially created grooves in the cervical, middle and apical root thirds. Forty extracted bovine incisor roots were instrumented to 1 mm of the root apex with a R50 Reciproc instrument and irrigated with 2.5% sodium hypochlorite. The roots were then inserted in a muffle and cleaved into two hemisections. Grooves (3-mm long) were done at 2, 7 and 12 mm from the root apex in one hemisection and filled with dentinal debris. The hemisections were regrouped into the muffle and divided into 4 groups (n=10) according to the final irrigation protocol: Control group: 3x20 s using a #30 gauge needle without agitation of the irrigating solution; Group PUI-s (static passive ultrasonic irrigation): 3x20 s of passive ultrasonic irrigation with the tip of the insert maintained static on the apical third; Group PUI-t (passive ultrasonic irrigation per third): 20 s of PUI in each third; Group PUI-d (passive dynamic ultrasonic irrigation): 3x20 s of PUI dynamically moving the insert in the whole extent of the root canal. In all groups, was used a total of 6 mL of 2.5% sodium hypochlorite as irrigant. After these procedures, the grooves were analyzed with a stereomicroscope and assigned scores as regards removal of the debris. The data were analyzed statistically (a=0.05). The results showed a better cleaning in all the groups where the irrigating solution was agitated with ultrasonic device than in the control group (p<0.05). In the apical third, the PUI-d and PUI-s showed similar performance (p>0.05) and a better cleanness than PUI-t (p<0.05). The dynamic and static methods of agitation of the irrigating solution provided more effective cleaning. PUI-d provided the most completely clean grooves suggesting that its use is the most adequate in cases of teeth with complex canal anatomy. (AU)

FAPESP's process: 12/06738-9 - Evaluation of materials, instruments and protocols of irrigation used in Endodontic treatment, by means of scanning electron microscopy and micro analysis of x-ray.
Grantee:Marco Antonio Hungaro Duarte
Support Opportunities: Regular Research Grants