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Objective
: This study aimed to evaluate the D0 diameter of standardized gutta-percha cones for four mechanized systems: ProTaper Universal®, Mtwo®, Wave One® and Reciproc®.
Methods:
An endodontic calibrator ruler was used to measure the D0 diameter of 60 main cones of the above systems. Measurements were made according 3 scores as follows: gutta-...
Context in source publication
Similar publications
Objective:
To verify the concordance in the evaluation of the apical limit of obturation (ALO) in filled root canals of primary teeth between digital and visual methods.
Material and Methods:
Twenty periapical radiographs of endodontically treated primary teeth were digitalized and evaluated by an endodontics specialist (E1), a PhD pediatric denti...
Citations
... There are reports in the literature on the wide variability in diameter and taper of commercially available gutta-percha points [15][16][17]. However, only a few papers address the accuracy of the greater taper GP points [18][19][20][21][22]. This study was performed to evaluate the ISO size compliance of GP greater taper points. ...
... However, the adaptation of these nonstandardized, feathered, tipped GP cones needs manual adjustment with GP calibers and cutters, 9 which incurs extra time not accounted for in this study, which may render this type of cone less efficient, compared to the ISO uniform greater taper and matching (ProTaper Next) GP cones which require no such calibration. Recent evidence has cast doubt on the degree greater taper GP cones conform to the dimensions of the NiTi instruments they correspond to, [32][33][34][35] this could explain the overall lack of differences between the groups. [32][33][34][35] A limitation of the present study was that it assessed the quality of obturation in an ex vivo setting, based on the percentage of voids and sealer. ...
... Recent evidence has cast doubt on the degree greater taper GP cones conform to the dimensions of the NiTi instruments they correspond to, [32][33][34][35] this could explain the overall lack of differences between the groups. [32][33][34][35] A limitation of the present study was that it assessed the quality of obturation in an ex vivo setting, based on the percentage of voids and sealer. Further investigation is necessary to understand how this correlates clinically. ...
Aim:
The aim of this ex vivo randomized study is to evaluate the efficiency of gutta-percha cones that match a nickel-titanium instrumentation system and nonmatching greater taper cones, when used with continuous warm vertical condensation technique.
Material and methods:
Thirty-six straight canals were prepared using ProTaper Next files, and the apical third was obturated using either ProTaperNext cones (group A), ISO uniform greater taper cones (group B), or nonstandardized cones (group C). Cone adaptation time was quantified by the number of required modifications. Micro-computed tomography was used to measure voids and sealer percentage.
Results:
There was no significant difference between the groups regarding void volume (p = 0.666), percentage (p = 0.379), and the number of modifications (p = 0.757). Sealer percentage, however, was significantly lower in group B when compared to group A (p = 0.0194).
Conclusion:
In straight canals, matching gutta-percha cones were not associated with significantly better obturation or saving time to fit the cone.
Clinical significance:
Using gutta-percha cones that do not match a nickel-titanium instrumentation system to obturate the straight canals with continuous warm vertical condensation technique is as efficient as using matching cones in terms of obturation quality and ease of cone fit.
A guta-percha é considerada o melhor material para obturação do canal radicular e o cumprimento das normas internacionais para sua fabricação é de extrema importância para a etapa de obturação. Esta pesquisa teve como objetivo avaliar o diâmetro da ponta e conicidade de cones acessórios de guta-percha não estandardizados tamanho M de três diferentes marcas comerciais brasileiras: Tanari, Odous e MK Life. Para tanto, 20 cones de cada marca foram fotografados, com auxílio do de um mini microscópio com câmera digital acoplada, para obter medições dos seguintes parâmetros: diâmetro da ponta (D0), diâmetro a 3 mm da ponta (D3), diâmetro a 16 mm da ponta (D16) e conicidade (C). As medidas encontradas foram submetidas a análises estatísticas e comparações entre os grupos das médias de cada parâmetro avaliado. As especificações ANSI/ADA números 57 e 78 foram utilizadas como referências para a análise da estandardização dos cones testados. Os respectivos valores médios de D0 e conicidade encontrados foram 0,05 mm e 0,07 para os cones Odous, 0,15 mm e 0,05 mm para os cones da fabricante Tanari, e 0,07 mm e 0,05 mm os cones da marca MK Life. De posse dos resultados, foi possível concluir que não existe padronização dos cones obturadores M entre as marcas avaliadas com discordância do preconizado pelas especificações ANSI/ADA.
