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Current Advances In Irrigation
Dr Ala Al-DamehDCLINDENT (Otago, NZ) BDS (Otago, NZ)Specialist Endodontist – Al Noor Hospital
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Peters 2004
Post-operative
Pre-operative
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Desired functions of irrigating solutions
Washing action Lubricant Dissolve inorganic tissue (dentine) Dissolve organic matter (dentine collagen, pulp
tissue, biofilm) Kill bacteria and yeasts (in biofilm) No caustic or cytotoxic effects Do not weaken tooth structure
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Irrigation Solutions
Sodium Hypochlorite HOCl is responsible for the antibacterial activity Commonly used in concentrations between
0.5% and 6% Potent antimicrobial agent It effectively dissolves pulpal remnants and
collagen It is the only root-canal irrigant of those in
general use that dissolves necrotic and vital organic tissue
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Smear Layer
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Irrigation Solutions
Weaknesses of Sodium Hypochlorite Unpleasant taste & toxicity It affects only the organic part of the smear
layer Presence of inflammatory exudate, tissue
remnants & microbial biomass consumes NaOCl and weakens its effect
Can have a detrimental effect on dentine elasticity & flexural strength???
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Irrigation Solutions
EDTA & CA Dissolve inorganic material including
hydroxyapatite They have little or no effect on organic tissue
and alone they do not have antibacterial activity EDTA and CA are used for 2 to 3 minutes at the
end of instrumentation & after NaOCl
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Irrigation Solutions
Chlorhexidine Digluconate (CHX) Continued antimicrobial effect (Substantivity) No bad smell or strong irritation to periapical
tissues It has no tissue-dissolving capability CHX 2% may be a good choice for maximized
antibacterial effect at the end of the chemomechanical preparation
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Irrigation Solutions
Interactions Between Irrigating Solutions Hypochlorite & EDTA
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CHX & NaOCl
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CHX & EDTA
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Irrigation SolutionsCombination Products
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Irrigation Solutions
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Irrigation Solutions
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Irrigation Solutions
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Challenges of IrrigationSmear Layer
NaOCl +EDTA
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Challenges of IrrigationDentine Erosion
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Challenges of Irrigation
Cleaning of Uninstrumented Parts of the Root-canal System
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Challenges of Irrigation
debris
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Challenges of Irrigation
Biofilm
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Challenges of Irrigation
Safety versus Effectiveness in the Apical Root Canal
Safety Effectiveness
Irrigation
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COMPUTATIONAL FLUID DYNAMICS IN THE ROOT-CANAL SPACE
Computational fluid dynamics (CFD) is a new approach in endodontic research to improve our understanding of fluid dynamics in the special anatomic environment of the root canal.
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Particle Tracking
Streamline
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Velocity distribution of irrigant flow
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Irrigation Devices & Techniques
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Irrigation Devices & Techniques
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Irrigation Devices & Techniques
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Irrigation Devices & Techniques
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Irrigation Devices & Techniques
Gutta-percha points
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Irrigation Devices & Techniques
EndoActivator
(Advanced Endodontics, Santa Barbara, CA, USA)
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Irrigation Devices & Techniques
Vibringe
(Vibringe BV, Amsterdam, The Netherlands)
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Irrigation Devices & Techniques
RinsEndo
(Durr Dental Co)
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Irrigation Devices & Techniques
EndoVac
(Discus Dental, Culver City, CA, USA)
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Macrocannula Microcannula
Master Delivery Tip
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Irrigation Devices & Techniques
Ultrasound
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Conclusion
Irrigation has a key role in successful endodontic treatment
Although NaOCl is the most important irrigating solution, no single irrigant can accomplish all the tasks required by irrigation. Detailed understanding of the mode of action of various solutions is important for optimal irrigation
New developments such as CFD and mechanical devices will help to advance safe and effective irrigation
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