• Marlene DeMaio, Kathleen McHale, Martha Lenhart, Joshua Garland, Christopher McIlvaine, and Michael Rhode.
• Department of Orthopaedic Surgery, Naval Medical Center Portsmouth, 620 John Paul Jones Boulevard, Portsmouth, VA 23708, USA.
• J Bone Joint Surg Am. 2012 Oct 17; 94 (20): e152.

BackgroundPlaster has been used for centuries as a stiffening agent to treat fractures and other musculoskeletal conditions that require rest, immobilization, or correction of a deformity. Despite modern metallurgy and internal stabilization, plaster casts and splints remain an important means of external stabilization. Casting is a dying art as modern internal and external fixation replace external immobilization. Proper casting technique is paramount. This manuscript outlines the history and chemistry of immobilization materials and techniques as well as the differences among them and the advantages and disadvantages of each.MethodsHistorical references, peer-reviewed journals, textbooks, and primary sources were reviewed to provide data for this review.ResultsThe history of immobilization reveals a progressive development and refinement of materials that culminated in Mathijsen's plaster bandage in 1851. In 1798, calcium sulfate (plaster of Paris) was introduced. By 1927, crinoline rolls dipped in plaster treated with binding agents facilitated application. Synthetic casting "tapes" (45% polyurethane resin and 55% fiberglass) were introduced in the 1970s. Splinting techniques are ancient, with development spurred by treatment of war wounds. Plaster relies on soft-tissue contact to maintain rigidity. There are well-known advantages, disadvantages, and complications of plaster management. Casting materials all create an exothermic reaction. Burns are associated with water temperatures of >24°C, more than eight layers (ply), and inadequate ventilation. The maximum water temperature must be lower with fiberglass casts. Plaster was the definitive management for most fractures for over 100 years until it was replaced by modern surgical techniques involving internal fixation in the latter part of the twentieth century.ConclusionsPlaster casts and splints remain an important treatment method for acute and chronic orthopaedic conditions.

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