TY  - JOUR
T1  - The Effect of Adding Glass and Polyethylene Fibers on Flexural Strength of Three Types of Glass-Ionomer Cements
AU - Tondari, Afsoon AU - Sharafeddin, Farahnaz AU - Alavi, AliAsghar 
JO  - Research Journal of Biological Sciences
VL  - 8
IS  - 3
SP  - 66
EP  - 70
PY  - 2013
DA  - 2001/08/19
SN  - 1815-8846
DO  - rjbsci.2013.66.70
UR  - https://makhillpublications.co/view-article.php?doi=rjbsci.2013.66.70
KW  - Flexural strength
KW  -glass-ionomer cements
KW  -glass fiber
KW  -polyethylene fiber
AB  - This study was to compare the flexural strength of three types of glass-ionomer cement combined with two types of fibers. About 90 specimens were prepared in a split mold. Glass and polyethylene fibers measuring 1 mm in length were added to the powder of Conventional Glass-Ionomer cement (CGIc), a Resin-Modified Glass-Ionomer Cement (RMGIc) and cermet (miracle mix). The specimens were divided into 9 groups according to the type of glass-ionomer cements and the fibers (n = 10): Group 1: CGIc; group 2: RMGIc; group 3: Cermet (MM); group 4: CGIc + glass fiber; group 5: RMGIc + glass fiber; group 6: MM + glass fiber; group 7: CGIc + polyethylene fiber; group 8: RMGIc + polyethylene fiber; group 9: MM + polyethylene fiber. The mean flexural strength (MPa) values were determined in a 3-point bending test at a crosshead speed of 0.5 mm min<SUP>-1</SUP> by a universal testing machine. The results were analyzed using two-way ANOVA and a post hoc Tukey test (p&lt;0.001). Flexural strength increased significantly after adding 8 glass or polyethylene fibers to GI cements (p&lt;0.001) except when glass fibers were added to cermet (p&gt;0.001). In addition, flexural strength of polyethylene fibers increased more than that of glass 3 fibers in all the groups (p&lt;0.001). Adding fibers, especially polyethylene fibers can increase flexural strength of glass-ionomer cements.
ER  -