Assessment of canal centering ability and topography of three nickel-titanium rotary systems / Avaliação da centralização do preparo e da topografia de três sistemas rotatórios de níquel-titânio
RFO UPF
; 19(1): 15-20, abr. 2014.
Article
in En
|
LILACS-Express
| LILACS
| ID: lil-726453
Responsible library:
BR1.1
ABSTRACT
Objective:
This study aimed to evaluate the canal cen-tering ability and topography of BioRaCeTM (BR), Wi-zard CD PlusTM (WP), and Wizard NavigatorTM (WN) instruments. Materials andmethod:
mesiobuccal roots of upper first molars were selected and randomly dis-tributed in three groups (n=10), according to the rota-ry system used for instrumentation. Canal transporta-tion was assessed at 2, 4, 6, and 8 mm from the root apex, by subtracting cone bean computed tomography (CBCT) images taken before and after preparation. The root canal center was marked in pre- and post-prepa-ration images, and the distance between these points was measured in bucco-palatal (BP) and mesio-distal (MD) directions. New instruments were analyzed un-der scanning electron microscopy (SEM) regarding their surface finishing, topographical features, and surface defects. The SEM images were obtained at the tip of the instrument, and at 5 mm from the tip. Data of the canal centering ability were analyzed by two-way ANOVA (? = 0.05).Results:
regardless of root level (2, 4, 6, and 8 mm), all groups presented canal transportation in both directions. Significant differences were not detected (p > 0.05). Surface finishing was regular in the BR group with rounded transitional angle. Cutting edges had a sharp angle in BR and WN groups, while WP instru-ments had a flattened angle.Conclusion:
despite such topographical differences between the rotary instru-ments tested, none of them were able to exactly main-tain the original root canal center, and no significant differences were observed among groups.
Full text:
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Index:
LILACS
Language:
En
Journal:
RFO UPF
Journal subject:
ODONTOLOGIA
Year:
2014
Type:
Article