Apical debris extrusion with Denco Gold and Blue rotary files: An in vitro study

Abstract

Background: Minimizing apical debris extrusion may help reduce postoperative pain, flare‑ups and
enhance the patient’s comfort. This study aimed to compare the apical debris extrusion weights of
two rotary file systems, Denco Gold and Denco Blue, with those of hand files.
Materials and Methods: In this in vitro study, 69 mandibular first molars with a curvature < 10°
and two separate root canals and foramen in the mesial root were selected. The samples were
randomly divided into three groups: Denco Blue rotary file, Denco Gold rotary file, and hand files.
After instrumentation, the extruded apical debris was gathered in glass containers and dehumidified.
The weight of the debris was measured and compared. Data analysis was conducted using SPSS 22
with one‑way analysis of variance and Tukey tests.
Results: The highest mean (standard deviation) of debris extrusion weight was observed with hand
files at 0.21 (0.03), followed by the Denco Gold rotary file at 0.10 (0.31), and the lowest with the
Denco Blue rotary file at 0.08 (0.27). There was a significant difference (P < 0.001) between the
rotary files and hand files, but no significant difference among the rotary files (P > 0.159).
Conclusion: Both Denco Blue and Denco Gold rotary files resulted in less apical debris extrusion
compared to hand files, with the two rotary file systems showing similar levels of debris extrusion.
Key Words: Crown down technique, debris extrusion, Denco Blue rotary files, Denco Gold rotary files, step‑back technique

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Hanieh Haghpanah: Pubmed,Google Scholar