The Vibraject device, which effectively masks the pain and sensation of the local anaesthetic injection, can also be very useful in endodontic disinfection procedures. Perhaps the most important aspect of disinfection is the choice to use an active rather than passive irrigation method.

The Vibraject unit is simply attached to the irrigation syringe and uses sonic vibration (common in prophylaxis procedures) to dislodge material from the root canal.

Endodontic irrigation benefits from sonic vibration. Studies have shown that the root canal surface treated with NaOCI and a chelating agent such as EDTA, with sonic vibration, loosens the coherence of the smear layer and becomes thinner with more opened tubule orifices. Studies have found more smear layer removal and open tubules using sonic vibration with the solutions, than with the solutions alone.

Removal of the smear layer and the opening of the tubules provide a potentially tighter adaptation between the obturation materials and the dentine walls of the preparation.

Sonic vibration needs a frequency of 100-200 Hz. This is the equivalent of 6,000-12,000 revolutions per minute. Vibraject attaches to your current irrigation syringe and creates a needle frequency of 180 Hz. There are no special accessories needed and no consumables.

Another advantage of sonic vibration is the removal of entrapped air and bubbles inside the root canal due to interactions between the irrigating solutions with the dentine cavity walls. Additionally, residual canal gases that may cause post-operative pain can also be reduced as well.

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