Abstract：
OBJECTIVE: To evaluate in situ the influence of sweat, oil, sunscreen, and disinfectant solution on the color stability, hardness, and roughness of elastomer for facial prostheses.
METHODS: Standardized and intrinsically pigmented specimens remained in contact with human skin from the same person for 30 days, considering exposures (n = 36 per group), absent of exposition (Control, C); sweat and oiliness contact (SO); sweat and oiliness associated with sunscreen (SOS); 0.12% chlorhexidine digluconate immersion (CD0.12%); and all agents exposed (SOSCD). The main variables were color change (CIELab and National Standard Bureau system, NBS), Shore A hardness, and surface roughness, measured at baseline and 30 days. Qualitative analyses were performed by atomic force microscopy (AFM) and scanning electron microscopy (SEM). The data were analyzed by Kruskal-Wallis tests (color) and two-way ANOVA (hardness and roughness) with Sidak post-test (α = 0.05).
RESULTS: CD0.12% (1.54 ± 0.49) and SOSCD (2.10 ± 1.03) had similar effects and caused the smallest color changes, considered mild and noticeable (NBS), respectively. SOS promoted the greatest color change (6.99 ± 1.43, NBS: large) and hardness (17.97 ± 0.56); SOS promoted intermediate roughness (3.48 ± 1.05) between SOSCD (2.25 ± 0.53), and two similar groups: C (4.46 ± 0.95), and CD0.12% (4.39 ± 1.26). The qualitative analysis showed an irregular, dense, dry, and whitish layer on the surface of the specimens exposed to sunscreen, which was reduced when in contact with 0.12% chlorhexidine digluconate.
CONCLUSIONS: Endogenous and exogenous factors are capable of altering elastomer properties. The 0.12% chlorhexidine digluconate minimized the changes caused by sweat, oil, and sunscreen.
METHODS: Standardized and intrinsically pigmented specimens remained in contact with human skin from the same person for 30 days, considering exposures (n = 36 per group), absent of exposition (Control, C); sweat and oiliness contact (SO); sweat and oiliness associated with sunscreen (SOS); 0.12% chlorhexidine digluconate immersion (CD0.12%); and all agents exposed (SOSCD). The main variables were color change (CIELab and National Standard Bureau system, NBS), Shore A hardness, and surface roughness, measured at baseline and 30 days. Qualitative analyses were performed by atomic force microscopy (AFM) and scanning electron microscopy (SEM). The data were analyzed by Kruskal-Wallis tests (color) and two-way ANOVA (hardness and roughness) with Sidak post-test (α = 0.05).
RESULTS: CD0.12% (1.54 ± 0.49) and SOSCD (2.10 ± 1.03) had similar effects and caused the smallest color changes, considered mild and noticeable (NBS), respectively. SOS promoted the greatest color change (6.99 ± 1.43, NBS: large) and hardness (17.97 ± 0.56); SOS promoted intermediate roughness (3.48 ± 1.05) between SOSCD (2.25 ± 0.53), and two similar groups: C (4.46 ± 0.95), and CD0.12% (4.39 ± 1.26). The qualitative analysis showed an irregular, dense, dry, and whitish layer on the surface of the specimens exposed to sunscreen, which was reduced when in contact with 0.12% chlorhexidine digluconate.
CONCLUSIONS: Endogenous and exogenous factors are capable of altering elastomer properties. The 0.12% chlorhexidine digluconate minimized the changes caused by sweat, oil, and sunscreen.
摘要：
目的：评估原位汗液的影响，油,防晒霜,和消毒液对颜色的稳定性，硬度,面部假体用弹性体的粗糙度。
方法：标准化和固有色素沉着的标本与同一个人的皮肤接触30天，考虑暴露(每组n=36)，没有阐述(对照，C）；出汗和油性接触（SO）；与防晒霜有关的出汗和油性（SOS）；0.12％的二葡糖酸氯己定浸入（CD0.12％）；以及所有暴露的试剂（SOSCD）。主要变量是颜色变化(CIELab和国家标准局系统，NBS),肖氏A硬度,和表面粗糙度，在基线和30天测量。通过原子力显微镜（AFM）和扫描电子显微镜（SEM）进行定性分析。通过Kruskal-Wallis测试（颜色）和双向ANOVA（硬度和粗糙度）以及Sidak后测试（α=0.05）分析数据。
结果：CD0.12％（1.54±0.49）和SOSCD（2.10±1.03）具有相似的效果，并引起最小的颜色变化，认为轻度和明显（NBS），分别。SOS促进了最大的颜色变化（6.99±1.43，NBS：大）和硬度（17.97±0.56）；SOS促进了SOSCD（2.25±0.53）之间的中间粗糙度（3.48±1.05），两组相似：C（4.46±0.95），CD0.12%(4.39±1.26)。定性分析显示不规则，密集,干,暴露于防晒霜的标本表面上的白色层，与0.12％的二葡萄糖酸氯己定接触时会减少。
结论：内源性和外源性因素能够改变弹性体性能。0.12％的二葡糖酸氯己定将汗液引起的变化降至最低，油,和防晒霜。
方法：标准化和固有色素沉着的标本与同一个人的皮肤接触30天，考虑暴露(每组n=36)，没有阐述(对照，C）；出汗和油性接触（SO）；与防晒霜有关的出汗和油性（SOS）；0.12％的二葡糖酸氯己定浸入（CD0.12％）；以及所有暴露的试剂（SOSCD）。主要变量是颜色变化(CIELab和国家标准局系统，NBS),肖氏A硬度,和表面粗糙度，在基线和30天测量。通过原子力显微镜（AFM）和扫描电子显微镜（SEM）进行定性分析。通过Kruskal-Wallis测试（颜色）和双向ANOVA（硬度和粗糙度）以及Sidak后测试（α=0.05）分析数据。
结果：CD0.12％（1.54±0.49）和SOSCD（2.10±1.03）具有相似的效果，并引起最小的颜色变化，认为轻度和明显（NBS），分别。SOS促进了最大的颜色变化（6.99±1.43，NBS：大）和硬度（17.97±0.56）；SOS促进了SOSCD（2.25±0.53）之间的中间粗糙度（3.48±1.05），两组相似：C（4.46±0.95），CD0.12%(4.39±1.26)。定性分析显示不规则，密集,干,暴露于防晒霜的标本表面上的白色层，与0.12％的二葡萄糖酸氯己定接触时会减少。
结论：内源性和外源性因素能够改变弹性体性能。0.12％的二葡糖酸氯己定将汗液引起的变化降至最低，油,和防晒霜。
