The research aims to evaluate the micro shear bond strength of the calcium silicate cement
(Biodentine) and the glass ionomer cement (GIC) to dentine. The study was performed using
upper or lower premolars, and samples were divided into six equal s
ubgroups according to
the time period (3 h, 1 day, 1 week, 2 weeks, 4 weeks, 8 weeks), in order to study changes in
the values of shear bond strength with time. The comparative study showed that the success
rate of adhesion in the Biodentine group was smaller than that in the GIC group for the tested
premolars after 3 hours and one day, whereas the success rate in the Biodentine group was
greater than that in the GIC group for the tested premolars after 8 weeks.
Results showed a positive correlation between the mean values of shear bond strengths and
the studied time in Biodentine group, which ranged from 1.49 ± 0.18 MPa at 3 hours to a
maximum value of 2.65 ± 0.26 MPa after 8 weeks. While there was a negative correlation
between the mean values and the studied time in the GIC group and values ranged from 3.02
± 0.13 MPa at 3 hours and 2.06 ± 0.09 MPa at 8 weeks.
The study showed the advantage of Biodentine compared with GIC in terms of
micro-bonding to dentine, which can have a clinically significant importance in preventing
the micro leakage and reducing bacterial contamination.
An appropriate bond between glass‑ionomer and the superficial
resin materials is very important for the success of sandwich
technique. The aim of the present in vitro study was to evaluate the
effect of three surface treatments of conventional glass‑ionomer on
its shear bond strength to giomer
The Objective is to determined whether enamel conditioning with sodium
hypochlorite (5,25%) and EDTA prior to etching was increased shear
bond strength of orthodontic brackets bonded with resin – modified glass
ionomer. our sample consisted of 42 extracted human premolars were
randomly divided into 3 groups.
Dental caries is an infectious bacterial disease that results in
localized dissolution and destruction of thecalcified tissues of the
teeth. There are many dental materials which have antibacterial
effects.
The aim of this study is to evaluate th
e antibacterial effects of the
commercial types of Glass Ionomers Cement (GIC)Kaviton® CEM
and Composite Prime Dental® using at the Faculty of Dentistry in
Al- Hawash Private University (HPU), and to make comparsion
between these.
Objective: To compare effect laser Er:Yag and polyacrylic acid on
microleakage of of resin-modified glass-ionomer cement.
Analysis of variance shows no statistical differences between
three groups .
Objective:This study evaluated the fluoride release of four dental restorative
materials for a period of 28 days.
Materials And Methods:A total of 10 specimens (4 * 2 * 2)mm3 for each of the four
materials were prepared following manufacturer’s in
structions and immersed
independently in 2 ml of distilled water which was changed every period for all the
specimens.
Results:The results demonstrated that the glass ionomer cements (Fuji IX GP and
VivaglassCem) release high fluoride compared with the compomer and composite resin,
but rapidly decreased after the third day and continued this releasing for a period of 28
days , also showed low fluoride release of composite resin and lacking entirely with the
passage of time.
Conclusions:The fluoride released by the glass ionomer cements (GICs) was found
to be highest during the first 24 h and decreased significantly over the 1st week with lower
levels obtained on the 28th day, thus demonstrating the phenomenon of “initial burst”.
The composite resin and compomer used in this study did not show this “initial
burst”.
Aim of study: to compare the ability of four restorative materials (MTA - Composite
- Zinc Phosphate - Glass Ionomer Cement) in coronal sealing of the endodontically treated
root canal orifice in extracted teeth.
Materials and Methods: 60 extracte
d teeth with single canal were chosen. X-Ray
Images were taken, then their crowns were cut off by using diamond disc, then the canals
were classically prepared, after that, they were filled with Zinc Oxide Eugenol Cement and
the gutta-percha cones using Lateral Condensation technique. They were left for (24) hours
in order to ensure the quite hardening of the filling material. After that, the filling material
was removed vertically by using an eraser tool up to a depth of (2) mm inside the root
canal. Then, the teeth were randomly divided into four groups, each contained (15) teeth
(n1=n2=n3=n4=15). The entry orifices of all the teeth were filled with one of the
restorative materials. The teeth were coated with Varnish except for 1 mm around orifices,
After then, they were immersed in Methylene Blue Dye of 2 % for five minutes. After that,
the teeth were washed under a stream of plentiful water and left to dry. Longitudinal
sections were made in the buccal lingual direction. Then the sections were examined under
the optical magnifier to measure the liner dye leakage using a millimeter ruler designed by
“AutoCAD 2013” Program.
Ready made post design plays an important role with resin cement ability on
post retention in to the root canal. While the paraposts are the most retentive.
To compare the resistance of serrated Para post, tapered-smooth, and threaded para posts, c
emented with
panivia21 to transverse load.
Most of previous studies used tensile or pressure forces (as parallel to tooth
long axis) to study the cemented posts resistance, But there are lateral forces tried to loosen, or bending
those posts.
Aim of study: detecting the resistance of Ready
- made Serrated- para Posts cemented by three different
Luting Cements to BendingMoment by applying a horizontal force on the free post end.
The purpose of this study was to evaluate the shear and tensile bond strengths of orthodontic
brackets bonded with self etching primer and resin-reinforced glass ionomer cement in comparison with
light cured resin adhesive.
The tested self-etching
primer and adhesive systems produced bond strength values higher than that of the light cured resin
adhesive whereas the resin-reinforced glass ionomer cement showed a significantly reduced bond strength
. Clinically, the use of self-etching primer and adhesive systems is suitable for orthodontic bracket
bonding.
