Article Options
Categories


Search


Advanced Search



This service is provided on D[e]nt Publishing standard Terms and Conditions. Please read our Privacy Policy. To enquire about a licence to reproduce material from endodonticsjournal.com and/or JofER, click here.
This website is published by D[e]nt Publishing Ltd, Phoenix AZ, US.
D[e]nt Publishing is part of the specialist publishing group Oral Science & Business Media Inc.

Creative Commons License


Recent Articles RSS:
Subscribe to recent articles RSS
or Subscribe to Email.

Blog RSS:
Subscribe to blog RSS
or Subscribe to Email.


Azerbaycan Saytlari

 »  Home  »  Endodontic Articles 3  »  The long-term sealing ability of an epoxy resin root canal sealer used with five gutta percha obturation techniques
The long-term sealing ability of an epoxy resin root canal sealer used with five gutta percha obturation techniques
Results.



The negative control teeth showed no dye penetration. The positive teeth showed dye penetration along the entire length of each root canal.
Agreement amongst examiners was evaluated using Cohen’s kappa (kappa = 0.92). No significant differences amongst the observers were scored, so that the calculation of the average leakage values of the two observers for each root was justified.
Since the data indicated a non-normal distribution, leakage was assigned using the following categories; Apical leakage: 0 = no leakage detected; 1 = up to 0.5 mm; 2 = 0.5–1 mm; 3 = 1–2 mm; 4 = >2 mm leakage (Table 1). Coronal leakage: 0 = no leakage detected; 1 = up to 1 mm; 2 = 1–2 mm; 3 = 2–4 mm; 4 = >4 mm leakage (Table 2). Statistical analysis was carried out using the Kruskal–Wallis test for-non-parametric data to determine whether there were significant differences between the groups. Pairs of groups were compared using the Mann–Whitney U -test.

Table 1. Apical leakage scores for the five obturation techniques.

Apical leakage scores for the five obturation techniques
Leakage scores: 0, no leakage detected; 1, up to 0.5 mm; 2, 0.5-1 mm; 3, 1-2 mm; 4, >2 mm leakage.


Table 2. Coronal leakage scores for the five obturation techniques.

Coronal leakage scores for the five obturation techniques
Leakage scores: 0, no leakage detected; 1, up to 1 mm; 2, 1-2 mm; 3, 2-4 mm; 4, >4 mm leakage.

Linear apical leakage of the experimental roots.
There were statistically significant differences between groups after 7 days ( P < 0.05) but not after 1 day or after 4, 6 and 12 months ( P > 0.05). Pairs of groups were compared using the Mann–Whitney U -test and statistically significant differences ( P < 0.05) were found between Soft-Core obturators and vertical condensation after 1 week and after 4, 6 and 12 months; between Soft- Core obturators and lateral condensation after 1 day and 1 week; and between Soft-Core obturators and hybrid condensation at all time periods ( P < 0.05). From these differences in leakage scores the hybrid condensation was superior at all maturation times. Table 3 contains the data on mean apical leakage plus standard deviations, and the minimum and maximum extent of apical leakage by technique and time. Root fillings with Soft- Core obturators and AH26 leaked more than when AH26 was combined with the other four obturation techniques.

Linear coronal leakage of the experimental roots.
The results for coronal leakage are provided in Table 4. There were significant differences in coronal leakage between the various obturation techniques after 1 and 7 days, and after 4 and 12 months ( P < 0.05). There were, however, no statistically significant differences in leakage between groups after 6 months ( P > 0.05). According to the Mann–Whitney test no statistically significant differences ( P > 0.05) were found between Soft-Core obturators and Thermafil obturators at any evaluation time. Statistically significant differences were found between Soft-Core obturators and lateral condensation after 1 day, 1 week and 4 months ( P < 0.001) and 6 and 12 months ( P < 0.05); between Soft-Core obturators and vertical condensation after 1 day, 1 week, 4 and 12 months ( P < 0.001) and 6 months ( P < 0.05); between Soft-Core obturators and hybrid condensation after 1 day, 1 week and 4 months ( P < 0.001) and 6 and 12 months ( P < 0.05). There were statistically significant differences between Thermafil and lateral condensation after 1 week ( P < 0.05); between Thermafil and vertical condensation after 1 day, 1 week and 4 months ( P < 0.001); between Thermafil and hybrid condensation after 1 day, 1 week and 4 months ( P < 0.001).