title: Properties of a modified cross-linked silicone for maxillofacial prostheses.
abstract: A dimethyl siloxane-triacetoxy terminated silane, Type A adhesive, can be modified with the base component of a medium grade polydimethyl siloxane with vinyl groups, MDX 4-4210, to produce more pliable maxillofacial prostheses. The mechanical properties of samples with various Type A adhesive/MDX 4-4210 ratios were determined. Addition of the MDX 4-4210 base decreased the hardness, modulus, and ultimate tensile strength, while the percentage elongation increased. The initial tear strength was relatively constant for the various ratios except for the 50/50 mix, where a 50% decrease was observed. The ability to obtain different mechanical properties by using various ratios of Type A adhesive and MDX 4-4210 could result in the production of maxillofacial prostheses which will more closely stimulate the properties of facial tissues.
mesh_terms: D000268:Adhesiveness; D000269:Adhesives; D001696:Biomechanical Phenomena; D004129:Dimethylpolysiloxanes; D006245:Hardness Tests; D008422:Materials Testing; D008447:Maxillofacial Prosthesis; D011474:Prosthesis Design; D012821:Silanes; D012825:Silicon; D012826:Silicone Elastomers; D012828:Silicones; D012833:Siloxanes; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D000269:Adhesives; D004129:Dimethylpolysiloxanes; C020964:MDX 4-4210; D012821:Silanes; D012826:Silicone Elastomers; D012828:Silicones; D012833:Siloxanes; D012825:Silicon