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 [or-tho´sis] (Gr.)
an orthopedic appliance or apparatus used to support, align, prevent, or correct deformities or to improve function of movable parts of the body. See also brace and splint.
cervical orthosis a rigid plastic orthosis that encircles the neck and supports the chin and the back of the head; used in the treatment of injuries to the cervical spine.
Cervical orthoses. A, Soft foam collar. B, Firm plastic collar.
Cervical orthoses offering rigid support to the cervical spine: A, Halo-type cervical orthosis attached to a polyethylene jacket. B, Four poster orthosis.
dynamic orthosis an orthosis that both gives support and aids in the initiation and performance of movement by a body part.
flexion orthosis (flexor orthosis) tenodesis splint.


, pl.


(ōr-thō'sis, -sēz),
An external orthopaedic appliance, for example, a brace or splint, that prevents or assists movement of the spine or the limbs.
[G. orthōsis, a making straight]


plural, orthoses Orthopedics The straightening of a deformity; an external device–eg, a cast, brace, or splint used to stabilize, reinforce or immobilize an extremity, ↓ sensory input to an extremity, prevent stretch weakness, ↓ contractures, functionally assist weak muscles, protect a limb with pressure sores, provide a mechanical block to prevent undesired movement Types Orthoses are available for spine, hip, foot, knee. See Foot orthotics, Scapular reaction.


, pl. orthoses (ōr-thō'sis, -sēz)
An external orthopedic appliance, as a brace or splint, that prevents or assists movement of the spine or the limbs.
Synonym(s): orthesis.
[G. orthōsis, a making straight]


(or-tho'sis) [Gr. orthosis, guidance, straightening]
Any device added to the body to stabilize or immobilize a body part, prevent deformity, protect against injury, or assist with function. Orthotic devices range from arm slings to corsets and finger splints. They may be made from a variety of materials, including rubber, leather, canvas, rubber synthetics, and plastic. orthotic (-thot'ik), adjective
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ankle-foot orthosis

Abbreviation: AFO
Any of a class of external orthopedic appliances, braces, or splints devised to control, limit, or assist foot and ankle motion and provide leg support. Typically, orthotics are made of lightweight materials such as thermoplastics. See: illustration

Patient care

A variety of ankle-foot orthoses are used. In the treatment of Achilles' tendon rupture, e.g., the orthosis holds the foot at a right angle to the horizontal plane of the body, in plantar flexion.

balanced forearm orthosis

Mobile arm support.

halo vest orthosis

Halo vest.

spinal orthosis

A supportive device applied to the back (and often encircling the trunk) that limits the movement of the vertebrae, alleviates pain, or unloads mechanical stress; back brace.

wrist-driven hand orthosis

Abbreviation: WDHO
An orthotic that uses the muscles of the wrist, esp. the extensor muscles, to drive the fingers together into a grasping motion. It can be used by people with paralysis of the hand to improve the ability to hold on to and release objects.

wrist-driven wrist-hand orthosis

Abbreviation: WDWHO
A dynamic splint used for functional grasp by people with C6 tetraplegia.
See: tenodesis (2); universal cuff.


An appliance worn on the body to reduce or prevent deformity or to provide support, relieve pain and facilitate movement.


A force system designed to control or correct or compensate for a bone deformity, deforming forces, or forces absent from the body.
References in periodicals archive ?
The increasing number of such conditions is positively influencing the demand for cranial orthoses and will lead to the expansion of the global cranial orthoses market at a CAGR of more than 8% during the forecast period.
According to a study led by Erasmus Medical Center, foot orthoses specifically molded to help people with plantar heel pain appear to be no more effective than cheaper over-the-counter insoles or other treatments.
[1.] The use of ankle foot orthoses in the management of stroke.
The immediate effects of fitting and tuning solid ankle-foot orthoses in early stroke rehabilitation.
According to Schultz-Johnson [17], static progressive orthoses have many advantages: (1) adjustable ROM and force, they could be adjusted to the maximum tolerable intensity to avoid pain and to have minimal damage; (2) controllable load, the patient could adjust load according to the subjective feeling; (3) higher tolerance and compliance; (4) mobility, the patient could do active exercise after removing the orthoses easily; and (5) effective, efficient, and economic, it requires less money and time by using static progressive orthoses.
The effect of foot orthoses on plantar tissue structures has been quantified previously.
The load sharing capacity of the two orthoses tested in the upright orientation are shown in Table 2.
Peacocks are leaders in the field and last year produced the world's first 3d printed orthoses. Experts from the firm have spoken about their work at global conferences.
The use of orthoses therapy for the treatment of osteoarthritis is often based on anecdotal evidence or clinical preference rather than the evidence-base.
deLateur, "Gait abnormalities in hemiplegia: their correction by ankle-foot orthoses," Archives of Physical Medicine and Rehabilitation, vol.
Orthoses can be used as prophylactics to optimise performance in sport.