title: Comparative study on stiffness properties of WOODCAST and conventional casting materials.
abstract: OBJECTIVE
  Plaster-of-Paris and synthetic materials (e.g. fibreglass) have been in clinical use as casting materials for decades. An innovative casting material, WOODCAST, brings interesting alternatives to the traditional materials. The aim of this study was to compare the stiffness properties of the WOODCAST material to traditional casting materials.
  
  
  METHODS
  In immobilization by casting, materials with variable stiffness properties are required. Ring stiffness of cylindrical samples correlates well with cast rigidity.
  
  
  CONCLUSIONS
  For load-bearing structures, the use of the WOODCAST Splint is recommended as equally high stiffness was obtained with the WOODCAST Splint as was with fibreglass. The WOODCAST 2 mm product is optimal for structures where some elasticity is required, and WOODCAST Ribbon can be used in any WOODCAST structure where further reinforcement is needed. The results show that WOODCAST material can be used in replacing traditional casting materials used in extremity immobilization.
  
  
  CONCLUSIONS
  The mechanical properties of casting material play an important role in safe and effective fracture immobilization. Stiffness properties of the WOODCAST casting material and conventional materials - fibreglass and plaster-of-Paris - were analysed in this study. The WOODCAST Splint appears to compare favorably with traditional materials such as Scotchcast.
authors.affiliation: Onbone Oy, Helsinki, Finland. eija.pirhonen@onbone.com
authors.forename: Eija
authors.initials: E
authors.lastname: Pirhonen
authors.forename: Antti
authors.initials: A
authors.lastname: Pärssinen
authors.forename: Mika
authors.initials: M
authors.lastname: Pelto
mesh_terms: D002133:Calcium Sulfate; D002370:Casts, Surgical / Q000009:adverse effects* / Q000592:standards*; D004548:Elasticity; D050723:Fractures, Bone / Q000628:therapy*; D005898:Glass; D006801:Humans; D008422:Materials Testing / Q000379:methods*; D011140:Polyurethanes; D016474:Weight-Bearing
chemical_list: D011140:Polyurethanes; C009753:fiberglass; C046709:Scotchcast; D002133:Calcium Sulfate