3D-printed short arm casts: reliability, validity, feasibility compared with conventional waterproof fiberglass casts: Supplementary material 1

Aim: To evaluate the reliability, validity, and feasibility of 3D-printed short arm casts (SACs) versus
conventional casts. Methods: Three raters of varying experience applied two conventional and two 3Dprinted
casts to a participant’s dominant wrist to evaluate reliability. Each cast was worn for 24 hours and
removed the following day after data collection. Results & conclusion: ICCs demonstrated ‘excellent’ intrarater
reliability for clinical effectiveness and patient satisfaction. There were no significant differences
between fiberglass and 3D-printed SACs. The 3D-printed SAC group had significantly higherwrist function
compared with the fiberglass SAC group. Discussion: This pilot case study demonstrates that 3D-printed
short arm casts may be a valid immobilization technique of the wrist compared with conventional
waterproof fiberglass casting.