کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3145143 1197046 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydroxyapatite effect on photopolymerization of self-etching adhesives with different aggressiveness
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی دندانپزشکی، جراحی دهان و پزشکی
پیش نمایش صفحه اول مقاله
Hydroxyapatite effect on photopolymerization of self-etching adhesives with different aggressiveness
چکیده انگلیسی

ObjectiveTo understand the correlation of the acidic monomer/hydroxyapatite (HAp) reaction with the photopolymerization behaviour of self-etching adhesives with different aggressiveness.MethodsTwo commercial self-etching adhesives the strong Adper Prompt L-Pop (APLP, pH ∼ 0.8) and the mild Adper Easy Bond (AEB, pH ∼ 2.5) were used. HAp powders were incorporated into both adhesives to acquire solutions with concentrations of 0, 1, 3, 5, 7 wt%. The attenuated total reflectance Fourier transform infrared (ATR/FT-IR) technique was employed to collect the in situ spectra during light-curing, from which the degree of conversion (DC) and polymerization rate (PR) were calculated. The pH of each tested solution was also measured.ResultsWithout HAp incorporation, the DC and PR of the strong APLP (7.8% and 0.12%/s, respectively) were much lower than those of the mild AEB (85.5% and 5.7%/s, respectively). The DC and PR of APLP displayed an apparent increasing trend with the HAp content. For example, the DC increased from 7.8% to 58.4% and the PR increased from 0.12 to 3.8%/s when the HAp content increased from 0 to 7 wt%. In contrast, the DC and PR of AEB were much less affected by the HAp content. The observations were correlated well with the spectral and pH changes, which indicated that APLP underwent a higher extent of chemical reaction with HAp than AEB.ConclusionsThe results disclosed the important role of the acidic monomer/HAp chemical reaction in improving the photopolymerization of the strong (low-pH) self-etching adhesives such as APLP. The phenomenon of polymerization improvement strongly depended on the adhesive aggressiveness.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Dentistry - Volume 40, Issue 7, July 2012, Pages 564–570
نویسندگان
, ,