Homogeneity and adaptation of endodontic fillings in root canals with enlarged apical preparation

Ashraf ElAyouti, Peter Kiefner, Hanjo Hecker, Ailing Chu, Claus Löst, Roland Weiger

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


Objective: The aim was to compare the homogeneity and adaptation of endodontic fillings placed in root canals with wide apical preparation. Study design: One hundred twenty root canals were prepared under simulated clinical conditions. The range of apical preparation size was 45 (narrow canals) to 60 (wide canals). The canals were filled using 4 techniques: Thermafil, GuttaFlow, apical cone, and vertical compaction. The root canals were sectioned at 5 levels. The adaptation and homogeneity of the filling were evaluated and statistically analyzed. Results: The percentage of canal outline in contact with the filling in the Thermafil group (91.3% [95% confidence interval (CI) 88.8%-93.6%]) was statistically significantly lower than in the other groups. No statistically significant differences were found between GuttaFlow (96.6% [95% CI 95.7%-97.5%]), apical cone (98.6% [95% CI 98.0%-99.3%]), and vertical compaction (98.1% [95% CI 96.5%-99.7%]). Similarly, the percentage of void area in Thermafil group (4.0% [95% CI 2.6%-5.3%]) was statistically significantly higher than in the other groups (GuttaFlow 1.4% [95% CI 0.1%-1.8%], apical cone 1.6% [95% CI 0.7%-2.4%], and vertical compaction 0.1% [95% CI 0.1%-1.8%]). Conclusions: The tested filling techniques/materials provided similar high values for the homogeneity and adaptation to root canal walls after enlarged apical preparation, except for Thermafil at the most apical level.

Original languageEnglish
JournalOral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics
Issue number3
Publication statusPublished - Sept 2009
Externally publishedYes

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Surgery
  • Dentistry(all)
  • Oral Surgery


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