Influence of Pigments and Pigmenting Methods on Color Stability of Different Silicone Maxillofacial Elastomers After 1-Year Dark Storage

Bankoğlu, Merve; Oral, Ihsan; Gül, Esma Başak; Yılmaz, Handan

doi:10.1097/scs.0b013e3182800f23

Cited by 15 publications

(12 citation statements)

References 27 publications

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“…It was concluded that, after 6000 h of dark storage, the colour change becomes perceptible regardless of vulcanization temperature and molding-stone colour. This result provides further evidence for the intrinsic colour degradation of maxillofacial silicone elastomers, which has also been demonstrated by Hatemleh et al, Polyzois et al, Haug et al, and Bankoglu et al [24, 25, 29, 39].…”

Section: Discussionsupporting

confidence: 83%

In vitro study of effects of aging and processing conditions on colour change in maxillofacial silicone elastomers

et al. 2019

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Background The inherent colour change in maxillofacial silicone elastomers becomes perceptible 6–12 months after fabrication. Determining the factors that accelerate the degradation of the prosthesis can help the clinicians increase its life span. Therefore, the aim of the study was to investigate the effect of time passage, processing temperature, and molding-stone colour on the colour change of maxillofacial silicone elastomers after darkroom storage for 6000 h. Methods A total of ten study molds, each incorporating ten specimen gaps were fabricated using five different colors of dental stones. The gaps were filled with coloured Cosmesil M511 maxillofacial silicone elastomer. Five of the study molds, one of each stone color, were processed at room temperature (25 °C) for 24 h while the remainder were vulcanized at 100 °C for 1 h. Two stainless-steel molds were also fabricated to obtain a total of twenty control-group specimens of the same dimensions that were processed under the same conditions as the study molds. Colour measurements of the vulcanized silicone samples were performed using a Konica Minolta spectrophotometer. Initial measurements were obtained after the blocks were removed from the molds and the final measurements were recorded 6000 h after storage in the dark at 25 °C and 40% relative humidity. The CIEDE2000 colour-difference formula was used to measure the changes in the colour. One-way and two-way ANOVA, and an independent-sample t-test were used for statistical assessments. Results For every group, the colour change exceeded the perceptible thresholds. Thus, either the vulcanization temperature or the colour of the molding stone has a significant effect on the colour change over time. Those samples vulcanized in green and white molding stones at 100 °C exhibited a significantly higher ∆L*, ∆a*, and ∆b* values relative to the samples vulcanized at room temperature. Conclusion The molding-stone colour and vulcanization temperature both affect the degree of colour change after storage in a dark environment. The L*, a*, and b* values for the maxillofacial silicone elastomers are influenced by the direction of the increase or decrease according to the selected colour. This effect varies as the temperature increases.

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Section: Discussionsupporting

confidence: 83%

In vitro study of effects of aging and processing conditions on colour change in maxillofacial silicone elastomers

et al. 2019

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“…This indicates that the material used in this study can withstand color change against natural weathering conditions and we also recommend using the neutral soap type that was used in this study. 8,10,12 Several authors suggested that color change may undergo with time without any external factor, which may be attributed to the additional cross-linking caused by continued chemical polymerization of the elastomer or by side reactions among impurities present within the silicone. Therefore it is worthy that the clinician must know the pigments, the coloration methods, and polymerization procedures.…”

Section: Discussionmentioning

confidence: 99%

“…Also the nonstop release of sub-products throughout this continuous polymerization process not only causes dimensional alterations of the silicon material but also chromatic pattern variations. 10,16 Color deterioration of the maxillofacial silicone prosthesis is attributed to the collective effect of numerous aspects such as environmental exposure, UV radiation, humidity, air pollutants, the method of disinfection and exposure to facial secretions as perspiration. On the other side internal factors include silicone composition, mode of curing, degree of cross-linking, extrinsic and intrinsic stains used; all these factors have a significant role in preserving or deteriorating the color of the silicone prosthesis.…”

Section: Discussionmentioning

confidence: 99%

“…For extrinsic coloration, coloring the prosthesis is done by applying to the other surface's heterogeneities. 10 The Commission Internationale de l'Eclairage (International Commission on Illumination) (CIE) L*a*b* color difference formula is considered to present a numeric data (ΔE*) that provide the magnitude of the color difference perceived between 2 objects. To measure color and changes in the color of objects, the CIE presented a technique that serves as a standard language.…”

Section: Maxillofacial Prosthetics Has Developedmentioning

confidence: 99%

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Spectrophotometric Analysis of the Effect of aging on Color change of Maxillofacial Silicone

Fawzy

Khourazaty

2021

Egyptian Dental Journal

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Purpose: The purpose of this study is to estimate the change in color stability of maxillofacial silicon after exposing it to natural weathering and disinfection using neutral soap (shampoo).Material and Methods: 60 specimens were prepared from addition linking vinyl polydimethyl siloxane and divided into 3 groups (n=20). The specimens were then conditioned differently as follows, Group I: Dark room storage (control group); Group II: Neutral soap disinfection; Group III: Outdoor natural weathering for 2 months. The color changes of the specimens were measured using a Reflective spectrophotometer (X-Rite, model RM200QC, Neu-Isenburg, Germany) using the Commission Internationale de I'Eclairage (CIE). 5 The measurements were taken after 1 month then after two months (follow up period).Results: There was insignificance increase in color change in neutral soap (shampoo) group. There was significance increase in color change in natural weathering group. In addition, there was significance difference between groups after 1 month and two months. Conclusions:Exposure to outdoor natural weathering and the disinfection with neutral soap (shampoo) causes color alteration of the maxillofacial silicone.

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“…Diğer yandan bu dıĢ etkilerin hiç birine maruz kalmayan karanlık ortamda, ısı ve nem koĢullarının optimal olduğu koĢullarda bekletilen silikon elastomerlerin de polimer yapısında devam eden çapraz bağlantı reaksiyonları ve pigmentlerin etkileĢimleri sebebiyle bir miktar renk değiĢimi gösterdiği bildirilmiĢtir. 35 GüneĢten gelen UV ıĢınları ve materyalin yapısal reaksiyonları sebebiyle bozulma hasta ve hekim tarafından kontrol edilmesi mümkün olmayan sebepler iken protez dezenfeksiyonunda kullanılan yöntemler arasında materyali en az etkileyeni seçmek, yapımı zahmetli ve maliyetli olan bu protezlerin ömrünü uzatmak için önemli bir konudur. Bu sebeple çalıĢmada bu protezlerin dezenfeksiyonu için sıklıkla kullanılan yöntemlerin renk değiĢimi ve yüzey pürüzlülüğü üzerindeki etkisi incelendi.…”

Section: Tartiġmaunclassified

Dezenfeksi̇yonun Maksi̇llofasi̇yal Si̇li̇kon Elastomeri̇n Fi̇zi̇ksel Özelli̇kleri̇ Üzeri̇ne Etki̇leri̇

Kurt¹,

Kiliçkaya²,

Güngör³

et al. 2020

Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi

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Bu çalıĢmanın amacı farklı dezenfeksiyon iĢlemlerinin maksillofasiyal silikon elastomerin yüzey pürüzlülüğü ve renk stabilitesi üzerine etkisinin değerlendirilmesidir. Gereç ve Yöntem: Maksillofasiyal silikon (M511; Technovent) materyalinden 60 adet disk Ģeklinde (15 mm çapında 3 mm kalınlığında) örnek hazırlandı. Örnekler dezenfeksiyon iĢlemlerine göre; 1) kontrol (distile su), 2) efervesan tablet (Corega), 3) nötral sabun (Sebamed), 4) dermal dezenfektan (Biorad Derm), 5) klorheksidin glukonat (Andorex) ve 6) otoklav olmak üzere altı gruba ayrıldı (n=10). Dezenfeksiyon iĢlemi otoklav grubu hariç günde iki defa 15 gün boyunca uygulandı. otoklav grubunda ise dezenfeksiyon toplamda 3 defa yapıldı. Renk ölçümleri, dezenfeksiyon iĢlemi öncesi ve sonrasında spektrofotometre ile gerçekleĢtirildi. Renk parametreleri kaydedilerek ΔE00 değerleri hesaplandı. Yüzey pürüzlülüğü (Ra) ölçümleri ise dezenfeksiyon iĢlemi öncesi ve sonrasında profilometre cihazı ile gerçekleĢtirildi. Elde edilen veriler; tek yönlü ANOVA ve tekrarlayan ölçümler için ANOVA testleri kullanılarak istatistik olarak analiz edildi (α=0,05). Bulgular: Otoklav grubunda ΔE00 değerleri (3,79); diğer gruplardan anlamlı derecede daha yüksek bulunurken diğer gruplar arasında istatistik olarak anlamlı fark yoktur (0,92-1,37) (P>0,05). Dezenfeksiyon iĢlemi öncesi ve sonrasında yüzey pürüzlülüğü değerlendirildiğinde dezenfeksiyon sonrası kontrol, efervesan tablet, nötral sabun, ve dermal dezenfektan gruplarında yüzey pürüzlülüğü değerleri anlamlı derecede daha yüksek bulundu (P<0,05). Nötral sabun grubunun dezenfeksiyon sonrası yüzey pürüzlülüğü değeri klorheksidin glukonat ve otoklav gruplarından anlamlı derecede daha yüksek bulundu (P<0,05). Sonuç: Otoklavda yapılan dezenfeksiyon iĢleminin maksillofasiyal silikon elastomerin renk değiĢimi üzerinde önemli etkisi bulunmaktadır. Dezenfeksiyon iĢlemleri genellikle maksillofasiyal silikon elastomerin yüzey pürüzlülüğünü arttırmaktadır. Anahtar kelimeler: dezenfeksiyon; maksillofasiyal protez; renk; silikon elastomerler ABSTRACT Aim: The purpose of this study was to evaluate the effects of different disinfection procedures on the surface roughness and color stability of the maxillofacial silicone. Material and Methods: Sixty disc-shaped specimens (15 mm in diameter and 3 mm in thickness) were fabricated from a maxillofacial silicone rubber (M511; Technovent). The specimens were divided into six groups according to the disinfection procedures: 1) control (distilled water), 2) effervescent tablets (Corega), 3) neutral soap (Sebamed), 4) dermal disinfectant (Biorad Derm), 5) chlorhexidine gluconate (Andorex), and 6) autoclave (n=10). Disinfection was performed two times a day for 15 days except group autoclave. In the group autoclave disinfection was applied for three times in total. Color measurements were performed by using a spectrophotometer before and after disinfection process. Color parameters were recorded and ΔE00 values were calculated. Surface roughness (Ra) were measured before and after disinfection proces...

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Influence of Pigments and Pigmenting Methods on Color Stability of Different Silicone Maxillofacial Elastomers After 1-Year Dark Storage

Abstract: Significant color changes were observed in both pigmented and unpigmented specimens, which were stored in dark environment and not exposed to sunlight.

Cited by 15 publications

References 27 publications

In vitro study of effects of aging and processing conditions on colour change in maxillofacial silicone elastomers

In vitro study of effects of aging and processing conditions on colour change in maxillofacial silicone elastomers

Spectrophotometric Analysis of the Effect of aging on Color change of Maxillofacial Silicone

Dezenfeksi̇yonun Maksi̇llofasi̇yal Si̇li̇kon Elastomeri̇n Fi̇zi̇ksel Özelli̇kleri̇ Üzeri̇ne Etki̇leri̇

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