Effect of water storage on the translucency of silorane-based and dimethacrylate-based composite resins with fibres

2014 ◽  
Vol 42 (6) ◽  
pp. 746-752 ◽  
Author(s):  
Nurcan Ozakar Ilday ◽  
Neslihan Celik ◽  
Yusuf Ziya Bayindir ◽  
Nilgün Seven
Keyword(s):  
Water Storage ◽  
Composite Resins ◽  
Effect Of Water

scholarly journals Effect of water storage on flexural strength of silorane and methacrylate-based composite resins

2017 ◽  
Vol 42 (4) ◽  
pp. 309 ◽  
Author(s):  
Narges Panahandeh ◽  
Hassan Torabzadeh ◽  
Hani Naderi ◽  
Seyedeh Mahsa Sheikh-Al-Eslamian
Keyword(s):  
Flexural Strength ◽  
Water Storage ◽  
Composite Resins ◽  
Effect Of Water

scholarly journals Effect of light-activation methods and water storage on the flexural strength of two composite resins and a compomer

2006 ◽  
Vol 20 (2) ◽  
pp. 143-147 ◽  
Author(s):  
Leonardo Eloy Rodrigues Filho ◽  
Luis Antônio dos Santos Burger ◽  
Silvia Kenshima ◽  
José Roberto de Oliveira Bauer ◽  
Igor Studart Medeiros ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Composite Resin ◽  
Water Storage ◽  
Storage Period ◽  
Multiple Comparisons ◽  
Composite Resins ◽  
Activation Method ◽  
Light Activation ◽  
Tukey Test ◽  
Effect Of Light

The present study evaluated the flexural strength of three composite resins recommended for direct esthetic restorations: a polyacid modified composite (Dyract AP), a unimodal composite resin (Filtek Z250) and a hybrid composite resin (Point 4). The variation factors, apart from the type of composite resin, were the light activation method and the water storage period. The composite resins were light-cured in continuous mode (40 s, 500 mW/cm²) or in ramp mode (0-800 mW/cm² for 10 s followed by 30 s at 800 mW/cm²) and stored for 24 hours or 30 days in distilled water at 37°C. The data were analyzed by ANOVA and Tukey test for multiple comparisons (alpha = 0.05). The composite resin Z250 presented the highest mean flexural strength (166.74 MPa) and Dyract AP presented the lowest one (129.76 MPa). The storage for 30 days decreased the flexural strength in ramp mode (24 h: 156.64 MPa; 30 days: 135.58 MPa). The light activation method alone did not lead to different flexural strength values.

Surface Hardness Properties of Resin-Modified Glass Ionomer Cements and Polyacid-Modified Composite Resins

2004 ◽  
Vol 5 (4) ◽  
pp. 42-49 ◽  
Author(s):  
Yusuf Ziya Bayindir ◽  
Mehmet Yildiz
Keyword(s):  
Glass Ionomer Cement ◽  
Water Storage ◽  
Surface Hardness ◽  
Composite Resins ◽  
Bottom Surface ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Resin Modified Glass Ionomer ◽  
Hardness Values ◽  
Ionomer Cement

Abstract In this study the top and bottom surface hardness of two polyacid-modified composite resins (PMCRs), one resin-modified glass ionomer cement (RMGIC), and one composite resin were evaluated. The affect of water storage on their hardness was also investigated. The study was conducted using four different groups, each having five specimens obtained from fiberglass die molds with a diameter of 5 mm and a height of 2 mm. Measurements were made on the top and bottom surface of each specimen and recorded after 24 hours and again at 60 days. All tested materials showed different hardness values, and the values of top surfaces of the specimens were found to be higher than the bottom surface in all test groups. There was no statistical difference in the Vickers hardness (HV) values when the test specimens were kept in water storage. In conclusion Hytac displayed microhardness values higher than Vitremer and Dyract. We found the order of HV values to be Surfil > Hytac > Dyract > Vitremer, respectively. Vitremer presented the lowest microhardness level and Surfil the highest. Citation Bayindir YZ, Yildiz M. Surface Hardness Properties of Resin-Modified Glass Ionomer Cements and Polyacid-Modified Composite Resins. J Contemp Dent Pract 2004 November;(5)4:042-049.

Effect of water storage on stress distribution in root-filled premolars

2015 ◽  
Vol 31 ◽  
pp. e15
Author(s):  
S. Belli ◽  
O. Eraslan ◽  
G. Eskitascioglu
Keyword(s):  
Stress Distribution ◽  
Water Storage ◽  
Effect Of Water

scholarly journals A critical review of the effect of water storage reservoirs on organic matter decomposition in rivers

2017 ◽  
Vol 25 (2) ◽  
pp. 193-198 ◽  
Author(s):  
John Gichimu Mbaka ◽  
Mercy Wanjiru Mwaniki
Keyword(s):  
Organic Matter ◽  
Litter Decomposition ◽  
Water Storage ◽  
Organic Matter Decomposition ◽  
Effect Of Water ◽  
Storage Reservoirs ◽  
Different Types ◽  
Negative Effect ◽  
Tree Leaf ◽  
Habitat Variables

Organic matter decomposition is vital in sustaining river food webs. However, little is known about the effect of water storage reservoirs on organic matter decomposition in rivers. In this paper, we reviewed and analyzed 37 studies that investigated the effect of man-made reservoirs on organic matter decomposition in rivers. Most studies focused on decomposition of tree leaf litter (54.1%) and macrophytes litter (43.2%), while fewer studies evaluated decomposition of wood (2.7%). Based on qualitative analysis, the effect of small weirs on organic matter decomposition is local and the effect on most habitat variables is minimal. Mean effect sizes (Hedges’ g) for organic matter decomposition were −1.98 for small weirs, −1.31 for small reservoirs, and −0.66 for large reservoirs. This review demonstrates that, in general, reservoirs have a negative effect on litter decomposition. Litter decomposition, an important ecosystem process, is sensitive to impacts of reservoirs in different types of rivers.

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