The Collaborative International Dictionary of English v.0.48:

Orthopedic \Or`tho*ped"ic\, Orthopedical \Or`tho*ped"ic*al\, a.
   (Med.)
   Of, pertaining to, or employed in, orthopedics; relating to
   the prevention or cure of deformities of children, or, in
   general, of the human body at any age; as, orthopedic
   surgery; an orthopedic hospital.
   [1913 Webster]

WordNet (r) 3.0 (2006):

orthopedical
    adj 1: of or relating to orthopedics; "orthopedic shoes" [syn:
           orthopedic, orthopaedic, orthopedical]