scientfic research

1. The Effect of Storage Media on The Degree of ConversionThe Effect of Storage Media on The Degree of Conversion
of Different Types of Composite Resinof Different Types of Composite Resin
( An in vitro study)( An in vitro study)
Prof.DR. Amer A. Taqa
University of Mosul, College of Dentistry, Mosul, IRAQ
E-mail: amertaqa@Hotmail.com
Moataz GH. Saadallah Al-Shaekh Ali.
Fanar Turki Abdul Hammed Al-Jadwaa.

3. This study performed were to evaluate the effectiveness
of Pepsi, orange juice and coffee as storage media
on the Degree of Conversion of three types of
composite resin comparison with dry samples.
study performed were to evaluate the effectiveness
of Pepsi, orange juice and coffee as storage media
on the Degree of Conversion of three types of
composite resin comparison with dry samples.

5. 1-Three types of visible light-curing composite restorative
material (Te-Econom, Tetric ceram, VOCO)
2-Storages media(pepsi, coffee, orange juice
3-Fourier transform infrared spectroscopy (FTIR)
4-Polyethylene mold 5mm in diameter and 1mm in height to
determine
5-LED light curing unit

6. Sample Preparation
Degree of Conversion
5mm
1mm

7. Light curing
unit

8. After curing, the
material was removed
from the mold
Placed in a closed
dark containers
Stored 7days in
storage media
Separately crushed
and grinned manually
by piston and mortar
into powder
Powder mixed with
potassium bromide at
weight percentage 1:5
Powder poured into
metal mold
Compressed into a
disc shape by Bruker
press
Samples become
ready for
measurement by
FTIR

9. Uncured samples were prepared by placement on a
special cell supplied by the manufacturers of Fourier
transform infrared spectroscopy
Become ready for measurement

11. .
Storage Media
Paired Differences
t df Sig. stateMean
Std.
Deviation
Std. Error
Mean
COFFEE - DRY 10.65333 13.9811 3.6099 2.951 14 0.01 sig
ORANGE - DRY 14.302 10.861 2.8043 5.1 14 0 sig
PEPSI - DRY 12.4413333 13.166 3.3994 3.659 14 0 sig

12. Storage
Media
Paired Differences
t df Sig. stateMean
Std.
Deviation
Std. Error
Mean
ORANGE -
COFFEE 3.648666 5.9818 1.5445 2.3624 14 0.03 sig
ORANGE -
PEPSI 1.860666 3.97541 1.0264 1.8127 14 0.09 not sig
COFFEE -
PEPSI 1.788 3.95979 1.0224 -1.7488 14 0.1 not sig

13. -0.0037 Materials Mean Square F Sig.
Between Groups TE-ECONOM
81.33760667 1.33000479 0.2995
Between Groups VOCO
351.4011267 9.13480202 0.00
Between Groups TETRIC- CERAM
327.3153333 12.03520061 0.0002

16. THANK YOU