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Compend. Oral Sci:vol1(2);2015;6-13

The effect size using ETA squared was 0.82, area (N/mm²), medium-gauge rubber dam has
0.97, 0.86, 0.83, 0.83 respectively. The mean highest mean (±SD) which was 44.5075
square between the group was quite large indi- (±3.63074) compared to heavy-gauge rubber
cating that the difference in mean scores be- dam which was 35.7787 (±3.49714). When
tween the groups was also quite large. comparing heavy-gauge rubber dam and medi-
um-gauge rubber dam, there was a significantly
Post Hoc comparison using the Tukey HSD test
higher tensile strength for medium-gauge rub-
indicated that the mean maximum displacement
ber dam, yet the material was 0.09 mm thinner
strain percentage, maximum forces calculated
than heavy-gauge rubber dam. The maximum
at entire area, maximum stress calculated at
stress calculate at entire area (tensile strength,
entire area, maximum strain calculated at entire
MPa) test did show significant differences in
area and maximum stroke calculated at entire
comparisons of weight (thickness) for rubber
area for Group 1 (M=701.6269, SD=75.61201)
dam, however, these results were inconsistent
was significantly different from Group 2, Group
and incongruous. The heavy-gauge rubber
3, Group 4, and Group 5. All groups are signifi-
dam had a thickness that was 0.09 mm thicker
cantly different from each other.
than the medium-gauge rubber dam material,
yet it had approximately higher tensile strength.

Discussion The value (>27.6 MPa) called for in the federal

specification ZZ-R-690B Rubber Dam [14]
The manufacturer of a rubber dam (Sanctuary
shows that Rainbow Dental Dam powder-free of
Health ISO 9001 and ISO 13485) stated that
two different weights (medium-gauge and
the minimum tensile strength of a rubber dam is
heavy-gauge), complied with the specification
24.0 MPa meanwhile in Standard Malaysian
for rubber dam as the maximum stress calcu-
Gloves (SMG) did state the minimum tensile
late at entire area (tensile strength, MPa) for
strength of gloves is 18.0 MPa to meet the
medium-gauge rubber dam and heavy-gauge
ASTM D3578, Standard Specification for Rub-
rubber dam are 44.5075 (±3.63074) and
ber Examination Gloves [13]. These differ-
35.7787 (±3.49714). The value stated by feder-
ences were statistically significant; however,
al specification ZZ-R-690B Rubber Dam may
these differences are not considered to have
give rise to the possibility for Discovery 2020
any clinical relevance because rubber dam will
Powder Free Latex Examination to be rubber
not be stretched to its limits during clinical us-
dam as tensile strength value for this Discovery
age. There may be a question as to the useful-
hand gloves is within value stated (>27.6 MPa)
ness of this tensile strength test with modern-
which is 28.5922 (±3.27366). This shows that
day dental dam [2].
further test on different types of brand for
In descriptive analysis, all variable tested shows gloves in comparison to rubber dam can be
that heavy gauge rubber dam has the highest done.
mean (± SD) value for almost all variable tested
Moreover, the universal testing machine used
except for maximum stress calculate at entire
in this study was equipped with grippers that
area. In maximum stress calculate at the entire
were not suitable in rubber tensile tests. The

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