The use of an irrigation flow rate of 4 mL/min was able to achieve maximum effectiveness during Positive-pressure Irrigation and clearance of dye beyond needle tip in vivo root canal model, according to a recent study published in the Journal of Endodontics. This study aimed to measure the pressure generated during positive-pressure irrigation at the periapex of an in vitro tooth...

The use of an irrigation flow rate of 4 mL/min was able to achieve maximum effectiveness during Positive-pressure Irrigation and clearance of dye beyond needle tip in vivo root canal model, according to a recent study published in the Journal of Endodontics.

This study aimed to measure the pressure generated during positive-pressure irrigation at the periapex of an in vitro tooth model using a novel method of measurement, investigating the effect of flow rate and needle design. Apical pressure was correlated with the extent of dye clearance from the end of a needle tip in a plastic root canal model with similar dimensions.

The mesiobuccal canal of a mandibular molar was instrumented to #35/06 and placed into a chamber coupled to a pressure transducer. Irrigation was performed using a digital peristaltic pump using flow rates from 1–15 mL/min with irrigation needles of different sizes and designs. A plastic root canal model instrumented to the same size filled with dye was used to measure the extent of dye clearance beyond the needle tip using the same irrigation conditions.

Results of the study are:

Thus, if apical clearance of dye beyond the needle tip is a measure of irrigation effectiveness, then maximum effectiveness with safe apical pressures can be gained at specific flow rates using specific needle tip designs. The use of an irrigation flow rate of 4 mL/min was able to achieve maximum effectiveness in this study.

Apical Pressure and Extent of Irrigant Flow beyond the Needle Tip during Positive-pressure Irrigation in an In Vitro Root Canal Model by Ellen Park et al. published in the Journal of Endodontics.

https://doi.org/10.1016/j.joen.2012.12.004

Dr. Shravani Dali has completed her BDS from Pravara institute of medical sciences, loni. Following which she extensively worked in the healthcare sector for 2+ years. She has been actively involved in writing blogs in field of health and wellness. Currently she is pursuing her Masters of public health-health administration from Tata institute of social sciences. She can be contacted at editorial@medicaldialogues.in.

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