Performance of race instrumentation system in curved root canals: a comprehensive analysis by three study methods


Autoria(s): Leonardi, Denise Piotto; Sydney, Gilson Blitzkow; Tanomaru Filho, Mario; Baratto-Filho, Flares; Baratto, Samantha Schaffer Pugsley; Cerri, Paulo Sérgio
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

27/05/2014

27/05/2014

20/08/2013

Resumo

In this study, curved maxillary molar root canals were instrumented with RaCe rotary system to evaluate: 1. the occurrence of canal transportation using a radiographic platform; 2. the action of the instruments on the dentin walls, centering ability and canal enlargement by analysis of digital images; and the percentage of regular dentin surfaces and debris within the canal by histological analysis. Ten mesiobuccal roots of extracted human maxillary molars were embedded in acrylic resin and sectioned at the middle and apical thirds. Root canal shaping was performed using the RaCe rotary system at 250 rpm and 1 Ncm torque. Each instrument set was used five times according to a crowndown technique in the following sequence: 40/0.10, 35/0.08, 25/0.06, 25/0.04, 25/0.02 (working length - WL), 30/0.02 (WL) and 35/0.02 (WL). Each instrument was inserted until resistance was felt and then pulled back, followed by brushing movements towards all canal walls. Each specimen was assessed by three study methods: radiographic platform, digitized image assessment and histological analysis. The radiographic platform showed lack of apical transportation. No statistically significant difference (Wilcoxon test, p>0.05) was found between the middle and apical thirds regarding instrument action on dentin walls, centering ability, area of root canal enlargement, percentage of regular dentin surfaces and debris within the root canal. It may be concluded that RaCe system is a suitable method for the preparation of curved root canals, regarding the maintenance of root canal original path, action on dentin walls, canal enlargement and removal of debris from the root canal lumen.

Formato

230-234

Identificador

http://dx.doi.org/10.1590/0103-6440201301920

Brazilian Dental Journal, v. 24, n. 3, p. 230-234, 2013.

0103-6440

1806-4760

http://hdl.handle.net/11449/76296

10.1590/0103-6440201301920

S0103-6440201301920

2-s2.0-84881505239

2-s2.0-84881505239.pdf

Idioma(s)

eng

Relação

Brazilian Dental Journal

Direitos

openAccess

Palavras-Chave #Nickel-titanium #Root canal preparation #Rotary instruments
Tipo

info:eu-repo/semantics/article