title: Evaluation of softening ability of Xylene & Endosolv-R on three different epoxy resin based sealers within 1 to 2 minutes - an in vitro study.
abstract: OBJECTIVE
  This study evaluated the efficacy of Endosolv-R and Xylene in softening epoxy resin based sealer after 1 to 2 min exposure.
  
  
  METHODS
  Sixty Teflon molds (6 mm × 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 37℃ 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.
authors: Department of Conservative Dentistry & Endodontics, VSPM's Dental College & Research Center, Nagpur, India.
authors: Pratima Ramakrishna
authors: PR
authors: Shenoi
authors: Department of Conservative Dentistry & Endodontics, VSPM's Dental College & Research Center, Nagpur, India.
authors: Gautam Pyarelal
authors: GP
authors: Badole
authors: Department of Conservative Dentistry & Endodontics, VSPM's Dental College & Research Center, Nagpur, India.
authors: Rajiv Tarachand
authors: RT
authors: Khode
keywords: AH 26; AH plus; Adseal; Endosolv-R; Micro-hardness; Xylene