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A comparative study of selected physical properties of five root‐canal sealers
Author(s) -
McMichen F. R. S.,
Pearson G.,
Rahbaran S.,
Gulabivala K.
Publication year - 2003
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1046/j.1365-2591.2003.00701.x
Subject(s) - root canal , solubility , materials science , seal (emblem) , volumetric flow rate , composite material , dentistry , chemistry , medicine , art , physics , organic chemistry , quantum mechanics , visual arts
Aim To investigate selected physical properties of five root‐canal sealers. Methodology The solubility, film thickness, flow, working and setting times of Roth 801 ® , Tubli‐Seal EWT ® , AH Plus ® , Apexit ® and Endion ® were evaluated. Solubility was measured by weight change of standard specimens in water over a 3‐month period. Film thickness was measured as the distance between weighted glass slides containing a standard quantity of sealer. Flow was assessed by rate of sealer extrusion through a standard bore diameter, after unit time. Working time was taken as the point at which flow rate was reduced by 10%. The indentation test using a modified Gilmore needle was employed to investigate the setting times. Results AH Plus ® was the least soluble, whilst Apexit ® was the most unstable in water. The solubility values in increasing order were: AH Plus ® < Tubli‐Seal EWT ® < Endion ® < Apexit ® . Also, AH Plus ® had the highest film thickness. All sealers showed comparable flow rates. The working time varied from 50 min for Endion ® to over 2 h for AH Plus ® and Tubli‐Seal EWT ® . The range of setting times recorded was from 70 min for Tubli‐Seal EWT ® to 8 days for Roth 801 ® . Conclusions 1 AH Plus ® showed the greatest stability in solution and Tubli‐Seal EWT ® performed well, but Apexit ® and Endion ® had higher solubility values. 2 The film thickness values in increasing order were: Tubli‐Seal EWT ® < Apexit ® < Endion ® = Roth 801 ® < AH Plus ® . 3 The flow rates for all sealers were similar. 4 The working times for all sealers were greater than 50 min. 5 Roth 801 ® did not set when incubated in volumes sufficient to fill the test matrices.