Revidierbarkeit von Wurzelkanalfüllungen von ovalen Kanälen bei Unterkiefer-Inzisiven mit dem XP-endo Finisher
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Abstract
Background and objective:
Although root canal treatment is a promising therapy, it does not always lead to the desired complete healing of periodontitis apicalis of a tooth. Various factors that cause endodontic failures make endodontic retreatments unavoidable. The aim of a retreatment is to maintain or restore the integrity of the periapical region. A new mechanical and chemical preparation should ensure a bacteria-tight seal. Complete removal of the root
filling is therefore essential for an adequate revision. Oval canals in particular, with their oro-vestibular protrusions, present a challenge for conventional round preparation systems. This study will focus on the cleaning efficiency of the system combination of F360 and XP-endo Finisher in oval canals. The cleanliness of the oval canals is compared with each other after the different revision times (30 s, 60 s, 120 s, 240 s) and in relation to
the first revision step with the F360.
Material and Method:
Sixty extracted mandibular incisors, which had an oval cross-section in oro-vestibular alignment, were selected for the study. The teeth were shortened to a uniform length of 13 mm. This was followed by standardization of the oval canals with EndoTracer and Hedström files. The canals were prepared to .04/#55 size using the F360 system. After the canals were filled with .04/#55 and .02/#25 gutta-percha posts and AH Plus and condensed both laterally and vertically, the root canal filling, stored moist, cured for 14 days in the thermoregulator. A silicone impression was taken of all the test specimens
so that the teeth could be assembled later. In the first revision step, the F360 system with .04/#55 was used again. For evaluation, the specimens were cut in half in the mesio-distal direction using a diamond cutting disc and a scalpel. Microphotographic images were taken and examined using MoticamS. Subsequent quantification of the sealer residues was performed using Motic Images Plus 3.0 and ImageJ software. Afterwards, the canal halves were reassembled with Flow and pressed into the silicone impressions. The second revision step followed with the XP-endo Finisher. For this, the specimens
were divided into four groups (n=15) and cleaned at the respective revision times 30, 60, 120 and 240. Again, the root halves were cut in half and new images were taken with the Moticam S. Subsequently, the images were analyzed using Motic Images Plus 3.0 and ImageJ software. The statistical analysis was performed using SPSS 28.0.
Results:
The additional activation in a second retreatment step with the XP-endo Finisher led to a significant reduction in root filling material in all groups (Wilcoxon test: p < 0.05). However, the sealer could not be completely removed in any group. The proportion of residual root filling material was lowest in the apical canal section in group 4 at 4.89 % (MW). The largest amount of sealer (16.23 %) was also removed here. Although the proportion of residues was reduced in the middle canal section, there was no significant difference over time (Kruskal-Wallis test: p > 0.05). In contrast, a significant correlation between activation time and the proportion of removed sealer was demonstrated in the coronal canal section (Kruskal-Wallis test: p < 0.05 %). The greatest removal in the coronal canal section was found in group 4 (MW: 13.13 %), as in the apical canal section. The Mann-Whitney U test can confirm this (p < 0.05). However, the differences between groups 1 and 2 and groups 3 and 4 are an exception. In these groups, the difference was not significant. Smaller time jumps in the activation
duration are therefore not significant. According to this study, the optimal activation time with the XP-endo Finisher is 240 s.
Discussion and Conclusion:
The XP-endo Finisher can be a convincing additive retreatment technique in the retreatment of a root canal filling of an oval canal. It significantly minimized the sealer-covered canal areas in all sections (p < 0.05). The proportion of removed sealer was particularly high in the apical canal section. A significant reduction in the residuals was already observed at 30 s. According to this study, the optimum revision time is 240 s. Although the cleaning efficiency was increased by the XP-endo Finisher, the additional activation did not lead to complete removal of the root filling material in the canals. Consequently, further studies in the field of retreatment of oval canals are necessary.
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Issued: 2026-02-12
Faculty
FB20:Medizin
Language
de
Keywords
XP-endo FinisherRevisionWurzelkanalbehandlungovale KanäleF360AH Plus-SealerUnterkiefer-Inzisiven
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Meyer, Marie Charlotte: Revidierbarkeit von Wurzelkanalfüllungen von ovalen Kanälen bei Unterkiefer-Inzisiven mit dem XP-endo Finisher. : 2026-02-12.
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This item has been published with the following license: In Copyright