scholarly journals Mechanical properties and water sorption of two experimental glass ionomer cements with hydroxyapatite or calcium fluorapatite formulation

2019 ◽  
Vol 38 (3) ◽  
pp. 471-479 ◽  
Author(s):  
Zeynep Bilge KUTUK ◽  
Uzay KOC VURAL ◽  
Filiz YALCIN CAKIR ◽  
Ivana MILETIC ◽  
Sevil GURGAN
Keyword(s):  
Mechanical Properties ◽  
Water Sorption ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Experimental Glass

scholarly journals Assessment of the mechanical properties of glass ionomer cements for orthodontic cementation

2012 ◽  
Vol 17 (6) ◽  
pp. 154-159 ◽  
Author(s):  
Marcel M. Farret ◽  
Eduardo Martinelli de Lima ◽  
Eduardo Gonçalves Mota ◽  
Hugo Mitsuo S. Oshima ◽  
Gabriela Maguilnik ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Resin Modified Glass Ionomer ◽  
Strength Tests ◽  
Diametral Tensile Strength

OBJECTIVE: To evaluate the mechanical properties of three glass ionomers cements (GICs) used for band cementation in Orthodontics. METHODS: Two conventional glass ionomers (Ketac Cem Easy mix/3M-ESPE and Meron/Voco) and one resin modified glass ionomer (Multi-cure Glass ionomer/3M-Unitek) were selected. For the compressive strength and diametral tensile strength tests, 12 specimens were made of each material. For the microhardness test 15 specimens were made of each material and for the shear bond strength tests 45 bovine permanent incisors were used mounted in a self-cure acrylic resin. Then, band segments with a welded bracket were cemented on the buccal surface of the crowns. For the mechanical tests of compressive and diametral tensile strength and shear bond strength a universal testing machine was used with a crosshead speed of 1,0 mm/min and for the Vickers microhardness analysis tests a Microdurometer was used with 200 g of load during 15 seconds. The results were submitted to statistical analysis through ANOVA complemented by Tukey's test at a significance level of 5%. RESULTS: The results shown that the Multi-Cure Glass Ionomer presented higher diametral tensile strength (p < 0.01) and compressive strength greater than conventional GICs (p = 0.08). Moreover, Ketac Cem showed significant less microhardness (p < 0.01). CONCLUSION: The resin-modified glass ionomer cement showed high mechanical properties, compared to the conventional glass ionomer cements, which had few differences between them.

scholarly journals Water sorption of resin-modified glass-ionomer cements photoactivated with LED

2006 ◽  
Vol 20 (4) ◽  
pp. 342-346 ◽  
Author(s):  
Daniela Francisca Gigo Cefaly ◽  
Linda Wang ◽  
Liliam Lucia Carrara Paes de Mello ◽  
Janaína Lima dos Santos ◽  
Jean Rodrigo dos Santos ◽  
...  
Keyword(s):  
Water Sorption ◽  
Resin Composite ◽  
Composite Resins ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Constant Mass ◽  
Light Emitting ◽  
Halogen Light ◽  
Resin Modified Glass Ionomer ◽  
Light Curing

The Light Emitting Diodes (LED) technology has been used to photoactivate composite resins and there is a great number of published studies in this area. However, there are no studies regarding resin-modified glass-ionomer cements (RMGIC), which also need photoactivation. Therefore, the aim of this study was to evaluate water sorption of two RMGIC photoactivated with LED and to compare this property to that obtained with a halogen light curing unit. A resin composite was used as control. Five specimens of 15.0 mm in diameter x 1.0 mm in height were prepared for each combination of material (Fuji II LC Improved, Vitremer, and Filtek Z250) and curing unit (Radii and Optilight Plus) and transferred to desiccators until a constant mass was obtained. Then the specimens were immersed into deionized water for 7 days, weighed and reconditioned to a constant mass in desiccators. Water sorption was calculated based on weight and volume of specimens. The data were analyzed by two-way ANOVA and Tukey test (p < 0.05). Specimens photocured with LED presented significantly more water sorption than those photocured with halogen light. The RMGIC absorbed statistically significant more water than the resin composite. The type of light curing unit affected water sorption characteristics of the RMGIC.

Antibacterial and mechanical properties of reduced graphene-silver nanoparticle nanocomposite modified glass ionomer cements

2020 ◽  
Vol 96 ◽  
pp. 103332
Author(s):  
Jingwen Chen ◽  
Qi Zhao ◽  
Jianmin Peng ◽  
Xin Yang ◽  
Dongsheng Yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silver Nanoparticle ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Reduced Graphene

Effects of aging on shear bond strength to dentin and mechanical properties of restorative glass ionomer cements

2020 ◽  
Vol 102 ◽  
pp. 102693
Author(s):  
Adriana P. Manso ◽  
Kunal Chander ◽  
Karen M. Campbell ◽  
Regina G. Palma-Dibb ◽  
Ricardo M. Carvalho
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Effects Of Aging

Effect of poly(acrylic acid) architecture on setting and mechanical properties of glass ionomer cements

2020 ◽  
Vol 36 (3) ◽  
pp. 377-386 ◽  
Author(s):  
R. Wetzel ◽  
O. Eckardt ◽  
P. Biehl ◽  
D.S. Brauer ◽  
F.H. Schacher
Keyword(s):  
Mechanical Properties ◽  
Acrylic Acid ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Poly Acrylic Acid
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