Directional Converter Arm Method for Surface and Interfacial Tension Measurements with a Top-Loading Balance

The aim of this study was to evaluate the effect of reducing surface tension in endodontic chelator solutions on their ability to remove calcium from instrumented root canals. Aqueous solutions containing 15.5% EDTA, 10% citric acid, or 18% 1- hydroxyethylidene-1, 1-bisphosphonate (HEBP) were prepared with and without 1% (wt/wt) polysorbate (Tween) 80 and 9% propylene glycol. Surface tension in these solutions was measured using the Wilhelmy method. Sixty-four extracted, single-rooted human teeth of similar length were instrumented and irrigated with a 1% sodium hypochlorite solution and then randomly assigned (n = 8 per group) to receive a final one-minute rinse with 5 ml of test solutions, water, or the pure aqueous Tween/propylene glycol solution. Calcium concentration in eluates was measured using atomic absorption spectrometry. Incorporation of wetting agents resulted in a reduction of surface tension values by approximately 50% in all tested solutions. However, none of the solutions with reduced surface tension chelated more calcium from canals than their pure counterparts (p > 0.05).

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Directional Converter Arm Method for Surface and Interfacial Tension Measurements with a Top-Loading Balance

Cited by 4 publications

References 10 publications

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Adsorption of proteins at the oil/water interface—Observation of protein adsorption by interfacial shear stress measurements

Non-contact, radio frequency detection of ammonia with a printed polyaniline sensor

Reducing Surface Tension in Endodontic Chelator Solutions Has No Effect on Their Ability to Remove Calcium from Instrumented Root Canals

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