Influence of Air Abrasion and Long-term Storage on the Bond Strength of Self-etching Adhesives to Dentin

10.2341/06-61 ◽  
2007 ◽  
Vol 32 (3) ◽  
pp. 217-224 ◽  
Author(s):  
F. M. G. França ◽  
A. J. S. Santos ◽  
J. R. Lovadino
Keyword(s):  
Bond Strength ◽  
Aluminum Oxide ◽  
Clinical Relevance ◽  
Air Abrasion ◽  
Long Term Storage ◽  
Term Storage ◽  
Over Time

Clinical Relevance The adhesiveness of self-etching systems, used with aluminum oxide air abrasion to dentin, decreases over time.

Effect of air-blowing time and long-term storage on bond strength of universal adhesives to dentin

2018 ◽  
Vol 23 (6) ◽  
pp. 2629-2635 ◽  
Author(s):  
Pipop Saikaew ◽  
Jiale Fu ◽  
A. F. M. Almas Chowdhury ◽  
Ricardo M. Carvalho ◽  
Hidehiko Sano
Keyword(s):  
Bond Strength ◽  
Long Term Storage ◽  
Air Blowing ◽  
Universal Adhesives ◽  
Term Storage

scholarly journals Intraindividual variability over time in plasma biomarkers of inflammation and effects of long-term storage

2014 ◽  
Vol 25 (8) ◽  
pp. 969-976 ◽  
Author(s):  
Sheetal Hardikar ◽  
Xiaoling Song ◽  
Mario Kratz ◽  
Garnet L. Anderson ◽  
Patricia L. Blount ◽  
...  
Keyword(s):  
Intraindividual Variability ◽  
Plasma Biomarkers ◽  
Long Term Storage ◽  
Term Storage ◽  
Over Time

scholarly journals Long-Term Nanoleakage Depth and Pattern of Cervical Restorations Bonded With Different Adhesives

2012 ◽  
Vol 37 (1) ◽  
pp. 45-53 ◽  
Author(s):  
EH Mobarak ◽  
LE Daifalla
Keyword(s):  
Clinical Relevance ◽  
Adhesive System ◽  
Single Step ◽  
Short Term ◽  
Long Term Storage ◽  
Term Storage

Clinical Relevance A mild acetone-based single-step self-etched adhesive system may reveal less nanoleakage in the short-term interval, but unfortunately, this was not sustained after long-term storage.

scholarly journals Properties of Fiberboard Overpack Material in the 9975 Shipping Package Following Thermal Aging

2007 ◽  
Author(s):  
W. L. Daugherty
Keyword(s):  
Service Life ◽  
Physical Properties ◽  
Thermal Aging ◽  
Impact Resistance ◽  
Storage Conditions ◽  
Radioactive Material ◽  
Long Term Storage ◽  
Term Storage ◽  
Over Time

Many radioactive material shipping packages incorporate cane fiberboard overpacks for thermal insulation and impact resistance. Mechanical, thermal and physical properties have been measured on cane fiberboard following thermal aging in several temperature/humidity environments. Several of the measured properties change significantly over time in the more severe environments, while other properties are relatively constant. These properties continue to be tracked, with the goal of developing a model for predicting a service life under long-term storage conditions.

scholarly journals Effect of Dentin Biomodification Using Naturally Derived Collagen Cross-Linkers: One-Year Bond Strength Study

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Carina S. Castellan ◽  
Ana K. Bedran-Russo ◽  
Alberto Antunes ◽  
Patricia N. R. Pereira
Keyword(s):  
Bond Strength ◽  
Adhesive System ◽  
Grape Seed ◽  
Seed Extract ◽  
Long Term Storage ◽  
Acetone Water ◽  
One Step ◽  
One Year ◽  
Term Storage

Purpose.This study investigated the long-term resin-dentin bond strength of dentin biomodified by proanthocyanidin-rich (PA) agents.Materials and Methods.Forty molars had their coronal dentin exposed, etched, and treated for 10 minutes with 6.5% grape seed extract (GSE), 6.5% cocoa seed extract ethanol-water (CSE-ET), 6.5% cocoa seed extract acetone-water (CSE-AC), and distilled water (CO). Samples were restored either with One-Step Plus (OS) or Adper Single-Bond Plus (SB). Bond strength test was performed immediately or after 3, 6, and 12 months.Results.HigherμTBS were observed for GSE immediately (SB- 62.9 MPa; OS- 51.9 MPa) when compared to CSE-ET (SB- 56.95 MPa; OS- 60.28 MPa), CSE-AC (SB- 49.97 MPa; OS- 54.44 MPa), and CO (SB- 52.0 MPa; OS- 44.0 MPa) (P<0.05). CSE outcomes were adhesive system and solvent dependant. After 12 months storage SB results showed no difference among treatment types (GSE- 57.15 MPa; CSE/ET- 54.04 MPa; CSE/AC- 48.22 MPa; CO- 51.68 MPa;P=0.347),while OS results where treatment dependent (GSE- 42.62 MPa; CSE/ET- 44.06 MPa; CSE/AC- 41.30 MPa; CO- 36.85 MPa;P=0.036).Conclusions.GSE and CSE-ET agents provided enhanced immediate adhesion and stabilization to demineralized dentin after long-term storage, depending on adhesive system.

Effect of Long-term Storage on Sterile Status of Devices in Surgical Packs

1987 ◽  
Vol 8 (7) ◽  
pp. 289-293 ◽  
Author(s):  
N. Ariene Klapes ◽  
Velvl W. Greene ◽  
Ann C. Langholz ◽  
Cindy Hunstiger
Keyword(s):  
Stainless Steel ◽  
Laminar Flow ◽  
Long Term Storage ◽  
Laminar Flow Hood ◽  
Storage Times ◽  
And Storage ◽  
Term Storage ◽  
Over Time

AbstractWe investigated the effect of the following on the sterile integrity of surgical packs: four wrapping materials (two-ply reusable, nonbarrier wovens, both new and previously used; disposable, barrier nonwovens; and polypropylene peel pouches), dustcovers, two storage locations, and storage times ranging from 2 to 50 weeks. Two hundred sixty-three packs containing stainless steel coupons were prepared, wrapped, sterilized, and stored. Half of the packs were dustcovered prior to storage. At monthly intervals for a year, packs of each type were opened in a laminar flow hood, and the coupons inoculated into trypticase soy broth. The coupon contamination probabilities were 0.019 for reusable, woven packs; 0.017 for disposable, nonwoven packs; and 0.016 for peel pouches. These differences were not significant. The probability of finding a contaminated coupon in any pack after 50 weeks was 0.018. No trend toward increased probability of contamination over time was observed for any of the pack types studied.

scholarly journals Effect of ageing on magnetic and electrical properties of Ti–substituted La-Sr manganites

2018 ◽  
Vol 185 ◽  
pp. 06002 ◽  
Author(s):  
A. Badelin ◽  
Z. Datskaya ◽  
S. Estemirova ◽  
V. Karpasyuk ◽  
D. Merkulov
Keyword(s):  
Curie Point ◽  
Storage Period ◽  
X Ray Diffraction ◽  
Electrical Parameters ◽  
Long Term Storage ◽  
Ti Content ◽  
Term Storage ◽  
Over Time ◽  
Error Of Measurement

The changes of structural, magnetic and electrical parameters of ceramic La0.8-xSr0.2+xMn1-xTixO3+γ (0.025 ≤ x ≤ 0.150) manganites during long-term storage at room temperature and after thermal cycling were investigated. The unit cell volume (V) of all manganites decreased over time. Most considerable decrease of V and broadening of X-ray diffraction lines width were observed in the samples with high quantity of titanium. During the storage period magnetization (σ) and Curie point (Tc) of manganites with relatively low Ti content decreased, while the compositions with high values of “x” exhibited some trend of σ and Tc increase. The resistance of the samples with x < 0.100 increased over time. Fluctuations of magnetization of all thermal-aged samples were within the error of measurement, and Curie point of manganites with x = 0.150 showed the rise. From the data obtained it might be inferred that ageing phenomena in Ti-substituted manganites can be associated with oxidation processes, the transfer of Ti4+ to vacant sites in rare-earth sublattice and formation of microinhomogeneities.

scholarly journals Quality assessment of RNA in long-term storage: The All Our Families biorepository

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0242404
Author(s):  
Nikki L. Stephenson ◽  
Kylie K. Hornaday ◽  
Chelsea T. A. Doktorchik ◽  
Andrew W. Lyon ◽  
Suzanne C. Tough ◽  
...  
Keyword(s):  
Population Based ◽  
Rate Of Change ◽  
Population Based Study ◽  
Acid Yield ◽  
Rna Integrity ◽  
Long Term Storage ◽  
Term Storage ◽  
Over Time

Background The All Our Families (AOF) cohort study is a longitudinal population-based study which collected biological samples from 1948 pregnant women between May 2008 and December 2010. As the quality of samples can decline over time, the objective of the current study was to assess the association between storage time and RNA (ribonucleic acid) yield and purity, and confirm the quality of these samples after 7–10 years in long-term storage. Methods Maternal whole blood samples were previously collected by trained phlebotomists and stored in four separate PAXgene Blood RNA Tubes (PreAnalytiX) between 2008 and 2011. RNA was isolated in 2011 and 2018 using PAXgene Blood RNA Kits (PreAnalytiX) as per the manufacturer’s instruction. RNA purity (260/280), as well as RNA yield, were measured using a Nanodrop. The RNA integrity number (RIN) was also assessed from 5–25 and 111–130 months of storage using RNA 6000 Nano Kit and Agilent 2100 BioAnalyzer. Descriptive statistics, paired t-test, and response feature analysis using linear regression were used to assess the association between various predictor variables and quality of the RNA isolated. Results Overall, RNA purity and yield of the samples did not decline over time. RNA purity of samples isolated in 2011 (2.08, 95% CI: 2.08–2.09) were statistically lower (p<0.000) than samples isolated in 2018 (2.101, 95% CI: 2.097, 2.104), and there was no statistical difference between the 2011 (13.08 μg /tube, 95% CI: 12.27–13.89) and 2018 (12.64 μg /tube, 95% CI: 11.83–13.46) RNA yield (p = 0.2964). For every month of storage, the change in RNA purity is -0.01(260/280), and the change in RNA yield between 2011 and 2018 is -0.90 μ g / tube. The mean RIN was 8.49 (95% CI:8.44–8.54), and it ranged from 7.2 to 9.5. The rate of change in expected RIN per month of storage is 0.003 (95% CI 0.002–0.004), so while statistically significant, these results are not relevant. Conclusions RNA quality does not decrease over time, and the methods used to collect and store samples, within a population-based study are robust to inherent operational factors which may degrade sample quality over time.

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