Endodontic Canal Filling
Endodontic Canal Filling
Canal filling is the culmination of the endodontic sequence. Its quality is directly dependent on the shaping and irrigation that precede it. A well-executed fill achieves density throughout the canal length, accurate apical termination, and a coronal seal that protects the outcome until definitive restoration.
Radiographic Assessment of Fill Quality
A well-obturated canal should demonstrate fill to within 0–2mm of the radiographic apex, absence of visible voids, adequate density without radiolucent gaps, and no significant sealer extrusion beyond the apex.
The Coronal Seal
The coronal seal is as clinically critical as the apical seal. Microleakage from the coronal aspect is a primary cause of endodontic failure in otherwise well-obturated teeth. A minimum of 3–4mm of IRM, Cavit, or equivalent material should be placed coronally if definitive restoration is delayed.
Temporization After Obturation
The duration of temporization should be minimized. Evidence consistently supports expeditious definitive restoration as a key determinant of long-term endodontic success.
Transition to Restorative Care
Canal filling marks the end of the endodontic phase, not the end of treatment. The restorative phase determines whether the endodontic outcome is preserved over time.
The coronal-to-apical failure pathway is well-documented and clinically underappreciated. Canal filling and coronal sealing must be treated as a single clinical objective, not two separate steps.
References
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