[EO-20] Photographic color evaluation of pigmented silicone elastomer with and without filler infusion subjected to tropical climate
[Abstract]
Objective: The study aims to digitally assess how SiO2 filler and outdoor weathering affect the color stability of silicone elastomers with blush and honey pigments exposed to tropical weathering.
Method: According to the ‘Fitzpatrick scale’ 2 oil-based pigments blush (FI-SK13) and honey (FI-SK09) were selected to make 216 pigmented prosthetic silicone specimens A-103(blush), A-103(honey), A-2006(blush), A-2006(honey) which were derived from custom 3D-printed templates (Fig.1). 72 pigmented specimens were weathered, 72 were kept within a dark chamber (control) and 72 were infused with nano-filler particle silicon dioxide1. Specimens were subjected to weathering (outdoor and dark storage) for 4 months within a custom exposure rack. The specimens were then photographed in an in-house standardized professional studio setup (Fig.2). A Macbeth color chart and software-based color calibration were used to extract the CIELAB values from the images. Afterward, an equation was used to evaluate the before-after weathering color differences . For statistical analysis, Independent Sample t-test and Multifactorial Analyses of Variance were performed2.
Results and Discussion: Within the vast range of weathering anomalies, A-103 (honey) and A-2006 (blush) exhibited no significant (P>.05) color differences after weathering with significant interaction (P<.001) effects observed between all silicone groups and pigments. However, nano-filler incorporated pigmented silicone exhibited no significant (P>.05) differences for factor pigments and filler groups, but a highly significant (P<.001) effect was observed for the silicone groups while they interacted all together. Based on the interaction effect, the study implies that A-103 (blush) showed less color degradation as they interacted positively with nano-filler.
References:
1)Kiat S et al, Beerbower M, Power JM et al. Influence of pigments and opacifiers on color stability of silicone maxillofacial elastomer. J Dent 2009; 37: E45–50
2)Bishal AK, Wee AG, Barao VAR et al. Color stability of maxillofacial prosthetic silicone functionalized with oxide nanocoating. J Prosthet Dent 2019; 121: 538–543
Objective: The study aims to digitally assess how SiO2 filler and outdoor weathering affect the color stability of silicone elastomers with blush and honey pigments exposed to tropical weathering.
Method: According to the ‘Fitzpatrick scale’ 2 oil-based pigments blush (FI-SK13) and honey (FI-SK09) were selected to make 216 pigmented prosthetic silicone specimens A-103(blush), A-103(honey), A-2006(blush), A-2006(honey) which were derived from custom 3D-printed templates (Fig.1). 72 pigmented specimens were weathered, 72 were kept within a dark chamber (control) and 72 were infused with nano-filler particle silicon dioxide1. Specimens were subjected to weathering (outdoor and dark storage) for 4 months within a custom exposure rack. The specimens were then photographed in an in-house standardized professional studio setup (Fig.2). A Macbeth color chart and software-based color calibration were used to extract the CIELAB values from the images. Afterward, an equation was used to evaluate the before-after weathering color differences . For statistical analysis, Independent Sample t-test and Multifactorial Analyses of Variance were performed2.
Results and Discussion: Within the vast range of weathering anomalies, A-103 (honey) and A-2006 (blush) exhibited no significant (P>.05) color differences after weathering with significant interaction (P<.001) effects observed between all silicone groups and pigments. However, nano-filler incorporated pigmented silicone exhibited no significant (P>.05) differences for factor pigments and filler groups, but a highly significant (P<.001) effect was observed for the silicone groups while they interacted all together. Based on the interaction effect, the study implies that A-103 (blush) showed less color degradation as they interacted positively with nano-filler.
References:
1)Kiat S et al, Beerbower M, Power JM et al. Influence of pigments and opacifiers on color stability of silicone maxillofacial elastomer. J Dent 2009; 37: E45–50
2)Bishal AK, Wee AG, Barao VAR et al. Color stability of maxillofacial prosthetic silicone functionalized with oxide nanocoating. J Prosthet Dent 2019; 121: 538–543