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Root Canal Instrumentation (RCS (Central area (Curvature Majority are…
Root Canal Instrumentation
Why
: Shaping RCS achieve tapered shape
How
: Chemomechanical, remove root dentin centrally, remove tissue substrate and microorganisms
Mechanical
:
Hand held vs Rotary
Materials
SS
NiTi
RCS
Central area
Curvature
Majority are curved
Increases complexity apically
Increases curvature apically
Cross section
Round (Usually apical)
Oval (Usually coronal); more challenging
Irregular/Ribbon (Usually coronal); more challenging
Diameter
(Usually related to conicity)
Wide coronal, narrow apically.
Apical configuration
More prone to procedural errors
Foramen
Accessory canals
Apical delta
Convergence
Divergence
Lateral parts
Fins
Anastomoses
Accessory canals
Complications in irrigation/instrumentation/endomicroscope
Curvatures
Divergence/Convergence
Changes to RC: (Usually proceeds coronal to apical)
Physiological aging
Reparation processes
Low grade irritation (slow caries, perio, trauma, bruxism)
Visualization techniques
2D: XR
3D: In vitro, micro-CT
Asepsis:
RD
Disinfection
Sterile instrument
Decontaminated materials