Detection of procedural errors during root canal preparation with stainless steel and nickel-titanium instruments by undergraduate students using periapical radiograph and cone beam computed tomography
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2013
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Introduction: This study investigated procedural errors made during root canal preparation
using stainless steel and nickel-titanium (NiTi) instruments by undergraduate students, using
two diagnostic imaging methods. Materials and Methods: Sixty human molars were divided
into three groups (n=20; group 1: K-Flexofile, group 2: K3, and group 3: BioRace). The root
canals were filled with gutta-percha and AH Plus. Periapical radiographs and cone beam
computed tomography (CBCT) images were obtained to detect procedural errors made by
undergraduate students during root canal preparation. Two examiners evaluated the presence
or absence of fractured instruments, perforations and canal transportations. The agreement
between observers was assessed using the kappa coefficient. The Kolmogorov-Smirnov, Fisher
exact, ANOVA and Tukey tests were used for statistical analysis. The level of significance was
set at 5%. Results: There were no significant differences in detecting procedural errors
between two- and three-dimensional diagnostic imaging methods. There were no significant
differences in procedural errors between stainless steel and NiTi instruments. Mean
preparation time was recorded in minutes, and results were significantly different between the
three groups. NiTi instruments had the lowest mean preparation time. Conclusion: Both
periapical radiographs and CBCT identified procedural errors, however, three-dimensional
images offered more diagnostic resources. The frequency of procedural errors was low for any
of the endodontic instruments despite being used by inexperienced operators.
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Palavras-chave
Cone beam computed tomography, Root canal preparation, Perforation, Nickel-titanium, Perforation, Dental instruments, Dental education
Citação
ALVES, Regis Augusto Aleixo et al. Detection of procedural errors during root canal preparation with stainless steel and nickel-titanium instruments by undergraduate students using periapical radiograph and cone beam computed tomography. Iranian Endodontic Journal, Tehran, v. 8, p. 160-165, 2013.