Restor Dent Endod.  2014 Feb;39(1):17-23.

Evaluation of softening ability of Xylene & Endosolv-R on three different epoxy resin based sealers within 1 to 2 minutes - an in vitro study

• Shenoi PR
• Badole GP
• Khode RT

Abstract

OBJECTIVES
This study evaluated the efficacy of Endosolv-R and Xylene in softening epoxy resin based sealer after 1 to 2 min exposure.
MATERIALS AND METHODS
Sixty Teflon molds (6 mm x 1.5 mm in inner diameter and depth) were equally divided into 3 groups of 20 each. AH 26 (Dentsply/De Trey), AH Plus (Dentsply/De Trey), Adseal (Meta-Biomed) were manipulated and placed in the molds allotted to each group and allowed to set at 37degrees C in 100% humidity for 2 wk. Each group was further divided into 2 subgroups according to the solvents used, i.e. Xylene (Lobachemie) and Endosolv-R (Septodont). Specimens in each subgroup were exposed to respective solvents for 1 and 2 min and the corresponding Vicker's microhardness (HV) was assessed. Data was analysed by Mauchly's test and two-way analysis of variance (ANOVA) with repeated measures, and one-way ANOVA.
RESULTS
Initial hardness was significantly different among the three sealers with AH Plus having the greatest and Adseal having the least. After 2 min, Xylene softened AH Plus and Adseal sealer to 11% and 25% of their initial microhardness, respectively (p < 0.001), whereas AH 26 was least affected, maintaining 89.4% of its initial microhardness. After 2 min, Endosolv-R softened AH 26, AH Plus and Adseal to 12.7, 5.6 and 8.1% of their initial microhardness, respectively (p < 0.001).
CONCLUSIONS
Endosolv-R was a significantly more effective short term softener for all the tested sealers after 2 min whereas Xylene was an effective short term softener against AH plus and Adseal but less effective against AH 26.

Keyword

Adseal; AH 26; AH plus; Endosolv-R; Micro-hardness; Xylene

MeSH Terms

Fungi
Hardness
Humidity
Polytetrafluoroethylene
Solvents
Xylenes*
Polytetrafluoroethylene
Solvents
Xylenes

Figure

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  Figure 1 Mean Vicker's microhardness (HV) of three sealers exposed to Xylene at three time points.

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  Figure 2 Mean Vicker's microhardness (HV) of three sealers exposed to Endosolv-R at three time points.

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