Which part of the body is the hallux?
Hallux rigidus may be treated via cheilectomy in which the metatarsal head is reshaped and bone spurs reduced. Stage 3 hallux rigidus often involves significant cartilage loss and may be treated by an osteotomy in which cartilage on the first metatarsal head is repositioned, possibly coupled with a hemi-implant in which the base of the proximal phalanx (base of the big toe) is resurfaced. Stage 4 hallux rigidus, also known as end stage hallux rigidus involves severe loss of range of motion of the big toe joint and cartilage loss. Stage 4 hallux rigidus may be treated via fusion of the joint
Supernumerary body part considered to have lost much or all of their original function through evolution. These body parts can be classed as additional to the required functioning of the body. In human anatomy the vermiform appendix is sometimes classed as a vestigial remnant. Prosthesis is an artificial extension that replaces a body part, and cybernetics is the study of computer technology in relation to organisms which can include replacement or additional body parts. Body integrity identity disorder (BIID) is a psychiatric disorder in which a person thinks that they have one or more additional limbs than they should, despite having two arms