- Removal of root canal debris seems to be related to:
- Canal diameter (the canal must be enlarged at least size 40 at the apex
- Viscosity or surface tension of the solution.
- Diameter of the irrigating needle.
- Depth of penetration of the irrigating needle.
- Volume of the solution used.
- Anatomy of the canal.
Previous studies showed that both mechanical and chemical action of the irrigant were dependent upon: - The efficiency of the delivery system (Abou-Rass M, Oglesby SW 1981)
- The tissue surface area in contact with the irrigant solution ( Baker et al. 1975, Moored WR, Wesselink PR 1982,Gomes et al. 2001, Radcliffe et al. 2004, Vianna et al. 2004,).
- The frequency of changing the solution (Moorer WR, Wesselink PR 1982)
- The total volume of the irrigant (Cunningham et al.1982,siqueira at al.2000, Sedgley et al.2005).
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