Influence of pigments and opacifiers on color stability of silicone maxillofacial elastomer |
| |
| Authors: | Sudarat Kiat-amnuay Meghan Beerbower John M Powers Rade D Paravina |
| |
| Institution: | 1. Department of Restorative Dentistry and Biomaterials, University of Texas Dental Branch at Houston, Houston, TX 77030, USA;2. Temple University, Kornberg School of Dentistry, Philadelphia, USA;1. Department of Stomatology, Faculty of Dentistry, Campus de Cartuja s/n E-18071, University of Granada, Spain;2. Department of Computer Architecture and Computer Technology, E.T.S.I.I.T. E-18071, University of Granada, Spain;3. Department of Optics, Faculty of Science, Campus Fuente Nueva, Edificio Mecenas, s/n E-18071, University of Granada, Spain;4. Post-Graduate Program in Dentistry, Dental School, University of Passo Fundo, Campus I, Passo Fundo, RS, Brazil;1. Resident, Department of Prosthodontics, Sri Dharmasthala Manjunatheshwara College of Dental Sciences and Hospital, Dharwad, Karnataka, India;2. Professor, Department of Prosthodontics, Sri Dharmasthala Manjunatheshwara College of Dental Sciences and Hospital, Dharwad, Karnataka, India;1. Associate Professor and Chairman of Substitutive Dental Sciences Department, University of Dammam, Dammam City, Kingdom of Saudi Arabia;2. Associate Professor, Restorative Dental Sciences Department, University of Dammam, Dammam City, Kingdom of Saudi Arabia; Assistant Professor, Dental Biomaterials Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt;3. Professor, Substitutive Dental Sciences Department, University of Dammam, Dammam City, Kingdom of Saudi Arabia;4. Assistant Professor, Substitutive Dental Sciences Department, University of Dammam, Dammam City, Kingdom of Saudi Arabia;5. Professor of Restorative Sciences and Biomaterialsm and Director, Division of Postdoctoral Prosthodontics, Boston University, Boston, Mass;1. Academic Unit of Restorative Dentistry, School of Clinical Dentistry, University of Sheffield, Claremont Crescent, Sheffield S10 2TA, UK;2. Department of Periodontology, School of Dentistry, University of Sulaimani, Zanko Street, Iraq;3. Department of Oral & Maxillofacial Surgery, School of Dentistry, University of Manchester, Coupland III Building, Coupland Street, M13 9PL, UK;1. Doctoral student, Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University, Sao Paulo, Brazil;2. Doctoral student, Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University, Sao Paulo, Brazil;3. Adjunct Professor, Department of Oral Surgery, Pathology and Dental Clinical, School of Dentistry, Minas Gerais Federal University, Minas Gerais, Brazil;4. Professor, Department of Prosthodontics and Periodontics, Piracicaba Dental School, Campinas University, Sao Paulo, Brazil;5. Professor, Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University, Sao Paulo, Brazil;6. Professor, Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University, Sao Paulo, Brazil;1. Maxillofacial Prosthetic Service, Prosthodontic Unit, School of Dental Sciences, Universiti Sains Malaysia, 16150 Kelantan, Malaysia;2. School of Dental Sciences, Universiti Sains Malaysia, 16150 Kelantan, Malaysia;3. College of Dentistry, Jouf University, Sakaka, KSA, Saudi Arabia |
| |
| Abstract: | ObjectivesTo determine the effects of opacifiers and silicone pigments on the color stability of silicone A-2000 maxillofacial prosthetic elastomers subjected to artificial aging.MethodsSeventy-five groups (n = 5) were made by various combinations (5%, 10%, and 15%) of four dry earth opacifiers (Georgia kaolin, Gk; calcined kaolin, Ck; Artskin white, Aw; titanium white dry pigment, Td); and 1 silicone pigment white (Sw) with one of 5 silicone pigments (no pigment (control), red (Pr), yellow (Py), burnt sienna (Po), and a mixture of Pr + Py + Po). A reflection spectrophotometer was used for color measurements. Color differences (ΔE*) between baseline and after an energy exposure of 450 kJ/m2 in an artificial aging chamber were calculated. A ΔE* = 3.0 was used as 50:50% acceptability threshold in result interpretation, while ΔE* = 1.1 was used as 50:50% perceptibility threshold. Means were compared by Fisher's PLSD intervals at the 0.05 level of significance. Color differences after aging were subjected to three-way analysis of variance.ResultsYellow ochre mixed with all opacifiers at all intervals had increased ΔE* values significantly from 0.7–2.1 up to 3.8–10.3. When mixed groups were considered, at 5%, Gk exhibited the smallest color changes, followed by Td < Aw = Sw < Ck, respectively. At 10%, Aw < Td < Gk < Sw = Ck. At 15%, Td < Aw < Gk = Sw < Ck (< indicates p < 0.0001 and = indicates p > 0.05). The smallest color differences, observed for opacifier groups, were recorded for Gk at 5%, and Td and Aw at 10% and 15%. Overall, 15% Td exhibited the smallest, whereas 5% Ck exhibited the most pronounced color change after artificial aging. All ΔE* values were below the 50:50% acceptability threshold, indicating acceptable color stability. Color differences for 10% and 15% of Aw and Td were below 50:50% perceptibility thresholds, indicating excellent color stability.ConclusionSilicone pigments mixed with 10% and 15% Artskin white and titanium white dry pigment opacifiers protected silicone A-2000 from color degradation over time. Yellow silicone pigment significantly affected color stability of all opacifiers especially silicone pigment white and calcined kaolin. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
