The biomechanical function of the radial stay is to control radial deviation of the wrist or to hol
d the thumb in abduction or a functional position.Some of the advantages to using a wrist support brace that includes a radial stay with thumb support is that it allows the radius (one of the two bones that comprises the forearm) to remain completely immobile while healing, as injuries to this bone generally happen at the end of the bone, where the bone isn’t as thick, it hold the thumb stable, as the ligaments in the hand connect the thumb to the radius, this is a simple, but effective design to keep the bones in alignment through the arm, wrist, and hand – allowing for a complete recovery from the injury with full flexibility in the injured area(s).
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The function of the radial stay is to control radial deviation of the wrist or to hold the thumb in abduction or a function position.
radial stay in a wrist support