Research Article

Influence of Different Pigmentations and Accelerated Aging on the Hardness and Tear Strength of the A-2186 and MDX4-4210 Silicones

Table 3

Mean (Shore A units) ± standard deviation (SD) for the hardness test of the MDX4-4210 and A-2186 silicones, comparing these silicones based on the same period and pigmentation (or no pigmentation).

PigmentationPeriodSiliconeMean ± SD value

Without pigmentationInitialA-218629.64 ± 1.56
MDX4-421027.30 ± 1.82
252 hoursA-218631.46 ± 1.56
MDX4-421028.34 ± 2.08
504 hoursA-218631.46 ± 0.78
MDX4-421029.64 ± 1.30
1008 hoursA-218630.16 ± 2.60
MDX4-421030.16 ± 1.04

BronzeInitialA-218629.64 ± 2.34
MDX4-421025.48 ± 1.04
252 hoursA-218630.94 ± 1.56
MDX4-421026.52 ± 1.04
504 hoursA-218631.72 ± 1.04
MDX4-421027.30 ± 1.04
1008 hoursA-218630.94 ± 0.26
MDX4-421027.82 ± 1.04

BlackInitialA-218630.94 ± 1.04
MDX4-421027.57 ± 1.82
252 hoursA-218632.76 ± 1.04
MDX4-421029.64 ± 1.30
504 hoursA-218631.98 ± 1.30
MDX4-421029.12 ± 1.56
1008 hoursA-218633.54 ± 1.30
MDX4-421029.12 ± 1.56

PinkInitialA-218628.08 ± 2.08
MDX4-421026.26 ± 0.78
252 hoursA-218631.20 ± 1.30
MDX4-421027.82 ± 1.30
504 hoursA-218631.98 ± 1.04
MDX4-421028.08 ± 1.56
1008 hoursA-218632.24 ± 0.78
MDX4-421027.82 ± 1.04

Significant statistical difference (, Tukey).