Tamarack Dorsiflexion Assist Flexure Joints provide motion assist for orthotic devices from ankle-foot orthoses, to elbow, wrist, and some pediatric knee applications. They have a biased design that provides motion assist power similar to traditional metal dorsi-assist ankle joints. Three durometers are available: 75, 85, or new 95 durometer polyurethane. Dorsiflexion assist flexures of the same size may be interchanged with each other or with the original free-motion Tamarack Flexure Joints to vary the amount of motion assistance provided. Dorsiflexion Assist Tamarack Flexure Joints provide a cosmetically appealing and functional option for dorsiflexion assist.