Results 181 to 190 of about 1,170 (215)
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Influence of pigments and opacifiers on color stability of silicone maxillofacial elastomer
Journal of Dentistry, 2009To determine the effects of opacifiers and silicone pigments on the color stability of silicone A-2000 maxillofacial prosthetic elastomers subjected to artificial aging.Seventy-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 ...
Sudarat, Kiat-amnuay +3 more
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Porosity and color of maxillofacial silicone elastomer.
Journal of prosthodontics : official journal of the American College of Prosthodontists, 2011Prosthesis color production and stability as a result of pore entrapment during mixing has not been investigated for maxillofacial silicone prostheses. The purpose of this study was to investigate pore numbers and percentages of a maxillofacial silicone elastomer mixed by two different techniques, using X-ray microfocus computerized tomography (Micro ...
Hatamleh, Muhanad M., Watts, David C.
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Color stability of pigmented maxillofacial silicone elastomer: Effects of nano-oxides as opacifiers
Journal of Dentistry, 2010This study evaluated the effects of nano-oxides on the color stability of pigmented silicone A-2186 maxillofacial prosthetic elastomers before and after artificial aging.Each of three widely used UV-shielding nano-sized particle oxides (TiO(2), ZnO, CeO(2)), based on recent survey of the industry at 1%, 2%, 2.5% concentrations were combined with each ...
Ying, Han +4 more
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Effect of nano-oxides on the color stability of maxillofacial silicone elastomers
The Journal of Prosthetic Dentistry, 2022A significant challenge of craniofacial prostheses is their limited service life because of degradation and color instability. In spite of improvements in the materials and techniques used for the fabrication of silicone maxillofacial prostheses, undesirable color change over time remains a challenge.
Simindokht Zarrati +3 more
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Evaluation of Various Reinforcements for Maxillofacial Silicone Elastomers
Journal of Biomaterials Applications, 1994Various reinforcements have been evaluated according to their effect on the mechanical properties of a silicone elastomer used for the preparation of maxillofacial prosthetic compositions. Emphasis was given to silica reinforcing fillers since fibrillar reinforcements [e.g., short aramid, glass or high modulus polyethylene (UHMPE)] seemed not to ...
A G, Andreopoulos, M, Evangelatou
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Use of thermochromic pigment in maxillofacial silicone elastomer
The Journal of Prosthetic Dentistry, 2013Silicone elastomers are used to fabricate external maxillofacial prostheses and are colored to match the adjacent facial skin. In cold winter weather, in certain individuals, the color of the skin changes toward red, which leads to a color difference between the prostheses and the surrounding tissue.The purpose of this study was to study the use of a ...
Kantola, RM +3 more
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Properties of Maxillofacial Silicone Elastomers Reinforced with Silica Powder
Journal of Biomaterials Applications, 1998Compounds of a silicone elastomer suitable for preparing maxillo-facial prostheses, reinforced with various amounts of silica powder, have been studied for their mechanical response and wetting properties in terms of contact angle. Tensile strength and elongation at break showed an increase with increasing silica volume fraction up to 35%, whereas the
A G, Andreopoulos +2 more
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Bonding of maxillofacial silicone elastomers to an acrylic substrate
Dental Materials, 2010To investigate the effect of three different primers on shear and peel bond strengths between three maxillofacial silicone elastomers and an acrylic resin after 360 h of accelerated daylight-aging.Peel and shear-bond strengths of three maxillofacial silicone elastomers (TechSil S25, Cosmesil M511, Cosmesil Z004) to acrylic denture resin bases using ...
Hatamleh, Muhanad M., Watts, David C.
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Properties of silicone maxillofacial elastomer processed in stone and metal
The Journal of Prosthetic Dentistry, 19801. The effect of mold conditions on the UTS, n, and TS at 200% and 300% elongations, and Shore A hardness was measured for Silastic 44210. 2. There was no difference in n, Shore A hardness, and TS at 200% and 300% elongation between Silastic 44210 samples whether produced in metal or coated stone molds. 3.
C N, Raptis, R, Yu, J G, Knapp
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Spray coloring of silicone elastomer maxillofacial prostheses
The Journal of Prosthetic Dentistry, 1969Pigment concentrates. The pigment concentrates are prepared by grinding the desired pigment with RTV 399 silicone elastomer in a mortar and pestle until a smooth pigment dispersion in silicone elastomer is obtained (Fig. 1). The formulations prepared are shown in Table I.
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