Proceedings of Topical Meeting on Optoinformatics (pdf-format, 1.21 ...

46 OPTOINFORMATICS’05
DENTAL RESIN HOLOGRAMS
S. Toxqui-López, A. Olivares-Pérez, N. Grijalva y Ortiz, M. P. Hernández-Garay,
B. Ruiz -Limón, I. Fuentes-Tapia
Instituto Nacional de Astr<strong>of</strong>ísica Óptica y Electrónica (INAOE),
Calle Luis Enrique Erro No. 1 Tonantzintla, Puebla, México
E-mail: stoxqui@inaoep.mx, olivares @inaoep.mx
The “Point 4 KERR ® ” is a light cured resin based on composite dental restorative can
be used as replayed recording holographic medium applied conventional
microlithography techniques with ultraviolet light, his material provides advantages in
production time and unit cost to replica with high diffraction efficiency Hologram.
There are different kinds <strong>of</strong> photopolymer resin to be found in the market. One <strong>of</strong> them is
“Point 4 KERR ® ” has a specify application in the odontology area, however it has other
application as such as holography, it is a composite resin that contains approximately 77%
by weight (59% by volume) inorganic filler with an average particle size <strong>of</strong> 0.4 microns,
their main components are bishhenol A- glycidyl methacrylate (Bis-GMA) resin matrix,
urethane dimethacrylate (UEDMA) and (TGDMA) [1,2,3] .
We doped the resin with solvent given result a liquid solution, this solution is analyzed by
IR spectroscopy (figure 1).
100.6
95
90
85
80
75
70
65
3413.84
3413.15
2964.01
2962.62 2177.28 2173.38
3020.81
2019.14
1996.17
1636.77 1637.23
1509.52 1509.57
1415.79
1453.70
1319.57
1320.63
1362.46
1297.39
1249.69
1296.61
830.87
814.24
829.60
812.46
666.82
60
55
%T
50
2
1718.07
1217.54
1161.22
45
40
35
1713.24
1
1163.77
30
25
20
p
prueba2
1 IR spectrum from “Point 4 KERR ® ”.
2 IR spectrum from “Point 4 KERR ® ” doped.
15
749.24
10
6.3
4000.0 3600 3200 2800 2400 2000 1800 1600 1400 1200 1000 800 650.0
cm-1
Figure 1. Infrared spectrums from the resin
In 3413.15 appear vibration from de bond CH that correspond a dimmer polymer, the
region 3020.81-2962.62 is due to asymmetry vibration from bond CH 3 -, the strong
absorption at 1713.24 which correspond to the carbonyl group C=O <strong>of</strong> group ester, - C=Cis
a medium in 1636.77, 1637.23 that imply an aromatic rings, the presence <strong>of</strong> –C-O-C
from ester group occur in 1040.44-999.55, also an absorption band with a high intensity in
749.24.UV spectrum is obtained (figure 2) we can observed important differences after UV
radiation the solution presents a change <strong>of</strong> density in the region 190-250 nm, therefore this
show that it is a photosensitive material.
1040.44
999.55
Coating film without UV exposition.
1.2
-------Coating film after exposition.
1.0
Absorbance(a.u)
0.8
0.6
0.4
Figure 2. UV spectrum <strong>of</strong> the resin.
0.2
0.0
100 200 300 400 500 600 700 800 900 1000
wavelength (nm)