Journal ArticleDOI
Polymerization kinetics of resin cements after light activation through fibre posts: an in vitro study.
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TLDR
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.Abstract:
Aim
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 ex vivo.
Methodology
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 (n = 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 anova and Tukey's test (P < 0.05).
Results
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 (P < 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 (P < 0.05).
Conclusions
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.read more
Citations
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Journal ArticleDOI
Influence of insertion techniques for resin cement and mechanical cycling on the bond strength between fiber posts and root dentin.
A.C.O. Souza,Fernanda de Cássia Papaiz Gonçalves,Lilian Costa Anami,Renata Marques de Melo,Marco Antonio Bottino,Luis Felipe Valandro +5 more
TL;DR: The use of the Centrix syringe improved the homogeneity of the cement layer, reducing the defects in the layer and increasing adhesive strength values to dentin, even after mechanical cycling.
Journal ArticleDOI
Influence of an iodonium salt on the properties of dual-polymerizing self-adhesive resin cements
Carolina Rocha Augusto,Vicente Castelo Branco Leitune,Fabrício Aulo Ogliari,Fabrício Mezzomo Collares +3 more
TL;DR: The addition of 0.5 mol% DPIHFP improved the physical properties of dual‐polymerizing self‐adhesive resin cements and promoted less degradation after immersion in solvent.
Journal ArticleDOI
Bonding durability of titanium tetrafluoride treated glass fiber post with resin cement.
Shaymaa E. Elsaka,Amr M. Elnaghy +1 more
TL;DR: Surface treatment of fiber post with TiF4 (4 wt/v%-4 min) solution exhibited higher bond strength to resin cement compared with other surface treatments, and flexural properties and microtensile bond strength were determined.
Journal ArticleDOI
Influence of light transmission through fiber posts: Quantitative analysis, microhardness, and on bond strength of a resin cement.
Luís Fernando dos Santos Alves Morgan,Marcos Pinotti,Fernanda Morais Ferreira,Giovana Mongruel Gomes,Guilherme Costa Silva,Rodrigo de Castro Albuquerque,Allyson Nogueira Moreira +6 more
TL;DR: A quantitative investigation of the radial transmission of light through different fiber posts and its influence on the Knoop hardness number (KHN) and bond strength (BS) of a dual-cure self-adhesive resin cement at 3 different depths found LT depended on the type of post and on depth.
Journal ArticleDOI
Degree of conversion of two self-adhesive resin luting cements through different lengths of fiber post.
Abdul Khabeer,Syed Zubairuddin Ahmed,Mukarram Zubair,Muhammad Ali Faridi,Mamdouh A. Al-Harthi +4 more
TL;DR: In this paper, the degree of conversion (DoC) of self-adhesive resin luting cements when irradiated through different fiber post lengths was evaluated with a total reflectance Fourier transform infrared spectroscopy reading.
References
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