Sof-Roll is a soft padding similar in appearance to Webril but slightly thicker.It is easier to apply without wrinkles than Webril, but it becomes very hard if caked with blood. It has a corrugated appearance, and there is more tendency for sliding to occur within the material. Specialist is softer than Webril and contains wood fiber.It requires the most practice to achieve a smooth application, however. Webril has a smooth surface and less tendency for motion within the thickness of the padding than some of the other padding materials.The water used for dipping should be deep enough to cover the material rolls standing on end. Plaster of paris in the water bucket from previously dipped plaster accelerates the setting time of the next plaster cast or splint. Cold water allows for less heat and for slower setting. Warm water causes more heat to be given off and affords faster setting. Gore-Tex padding material is available to aid in drying of the material, but submersion of a cast is still to be discouraged.Ĭ. This is incorrect if submerged, they need to be changed to avoid significant skin maceration. Patients are commonly under the impression that fiberglass casts can be gotten wet. Review in detail the instructions from each manufacturer before using the casting materials. Fiberglass is harder to apply, although the more recently introduced bias stretch material is an improvement. They are harder to contour than plaster of paris, and the polyurethane may irritate the skin. These materials are strong and lightweight, and resist breakdown in water they are also available in multiple colors and patterns. Fiberglass casts provide lower skin pressure when compared with plaster casts when properly applied. 2, 5, 6 These materials are preferred for most orthopaedic applications except in acute fractures in which reduction maintenance is critical. The exothermic reaction does not place the patient’s skin at risk for thermal injury. ![]() The prepolymer is methylene bisphenyl diisolynate, which is converted to a nontoxic polymeric urea substitute. Most of these are a fiberglass fabric impregnated with polyurethane resin. Two decades ago, a number of companies developed materials to replace plaster of paris as a cast material. Additives are used to alter the setting time three variations are available: (1) Extra fast setting takes 2 to 4 minutes, (2) fast setting takes 5 to 6 minutes, and (3) slow setting takes 10 to 18 minutes.ī.
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