Polymerization kinetics of resin cements after light activation through fibre posts: an in vitro study. (28th June 2014)

• Record Type: Journal Article
• Authors: Khabeer, A.; Whitworth, J.; Rolland, S.
• Is Part Of: International endontic journal. Volume 48:Number 3(2015:Mar.)
• Page Start: 261
• Page End: 267
• Publication Date: 2014-06-28
• Subjects: Endodontics -- Periodicals; 617.6342
• DOI: 10.1111/iej.12309
• Languages: English
• ISSNs: 0143-2885

Abstract

<abstract abstract-type="main" id="iej12309-abs-0001"> <title>Abstract</title> <sec id="iej12309-sec-0001" sec-type="section"> <title>Aim</title> <p>To measure the polymerization of light‐cured (Variolink Veneer, VLV) and dual‐cured (Variolink II, VLII) resin luting cements after light activation through different lengths of fibre post <italic>ex vivo</italic>.</p> </sec> <sec id="iej12309-sec-0002" sec-type="section"> <title>Methodology</title> <p>Degree of conversion after prolonged direct light activation (PLA) [12 min after LED light activation for 3 min] was determined using ATR‐FTIR. Models were then produced to allow samples of VLV and VLII (<italic>n</italic> = 5 each group) to be light‐activated through 3, 6 and 9 mm lengths of fibre post (Fiber Lux). Degree of conversion was assessed by ATR‐FTIR and expressed as a percentage of the degree of conversion achieved after PLA. Data were analysed using <sc>anova</sc> and Tukey's test (<italic>P </italic><<italic> </italic>0.05).</p> </sec> <sec id="iej12309-sec-0003" sec-type="section"> <title>Results</title> <p>Mean [SD] degree of conversion for VLV and VLII after PLA was 57.97% [1.51] and 54.71% [3.77], respectively. Light activation of VLV through a 3 mm post produced 81.62% of the PLA value, compared with 71.03% for the 6 mm and 46.04% for the 9 mm post. Conversion after activation through 9 mm posts was significantly less than through 3 mm and 6 mm posts (<italic>P </italic><<italic> </italic>0.05). For VLII, activation through a 3 mm post produced 66.51% of the PLA value, compared with 54.38% for the 6 mm and 41.56% for the 9 mm post. A significant decrease in degree of conversion was noted for VLII as post length increased (<italic>P </italic><<italic> </italic>0.05).</p> </sec> <sec id="iej12309-sec-0004" sec-type="section"> <title>Conclusions</title> <p>The degree of conversion for VLV reduced after light activation through 9 mm posts when compared to 3 mm and 6 mm posts, whilst the degree of conversion for VLII decreased with every increase in post length.</p> </sec> </abstract>