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Table 1 AFO material properties:

From: Patient specific ankle-foot orthoses using rapid prototyping

Description Unfilled Polypropylene Accura SI 40 Somos® 9120 UV
Tensile Strength (MPa) 31 - 37.2 57.2 - 58.7 30 -32
Elongation (%) 7 - 13 4.8 - 5.1 15 - 25%
Young's Modulus (GPa) 1.1 - 1.5 2.6 - 3.3 1.2 - 1.4
Flexural Strength (MPa) 41 - 55 93.4 - 96.1 41 - 46
Flexural Modulus (MPa) 1172 - 1724 2836 - 3044 1310 - 1455
  1. a) polypropylene used with the standard, prefabricated AFO); b) Accura SI 40 used with the rigid RP AFO and c) the epoxy photopolymer Somos 9120 used with the flexible RP AFO.