Page 29 - Demo

Teaching method influenced root filling quality?272To determine the difficulty level of the root canal treatment evaluated, observer 1 used DETI and if applicable ETC scoring systems.A person who was not otherwise involved in this study, transferred the following variables to an Excel data sheet:• Type of programme the student attended (former programme/revised programme).• Type of tooth in which the root canal treatment was performed (front tooth/premolar/molar).• Type of supervision during this treatment (general dental practitioner/endodontist).• Assessed quality of the root filling (poor/good).• The total number of the periapical radiographs, and the number of failed ones.• Difficulty level of the root canal treatment (less complex (DETI and ETC scores A, BI and BII)/complex (DETI and ETC score BIII))As the numerical data were not normally distributed, only non-parametric tests were used. Data were analysed through IBM SPSS Statistics version 21.0 software (IBM corporation, Armonk, NY, USA) using Cohen’s Kappa, Chi-square, Fisher’s exact, Mann-Whitney and Kruskal-Wallis tests. The significance level was set at 0.05.ResultsObservers reliabilityFor the quality of the root fillings, using Cohen’s Kappa analysis, the intraobserver reliability of observer 1 was κ=0.67 and of observer 2 it was κ=0.57. The interobserver reliability was κ=0.39.In all cases of disagreement, a consensus was reached after discussion, without a need of consulting the third observer.Distribution of independent variablesUsing Fisher’s exact test analysis no statistically significant relation was observed between the variables “type of supervision” and “type of programme” (Table 1). Annemarie Baaij.indd 27 28-06-2023 12:26