An externally applied device used to control motion & function of body segments
Compensate for a disorder & reduce handicap for biomechanical (& psychological) reasons.
Orthoses rely on 3 point fixation, moment arms & pressure distribution.
Named according to the joints over which they pass (eg. KAFO = Knee Ankle Foot Orthosis)
Descriptive Terms:
Conventional (leather, metal) vs. Contemporary (plastics)
Static, dynamic (store energy) or a combination
Corrective vs. Accommodative
Materials used:
Thermosetting plastics - mix liquid + catalysts to form model
Thermoforming plastics - soften when reheated & rigid when cooled
Lightweight foam plastics
Common Orthoses:
Insoles
Simple insoles - off the shelf or fabricated without casting
Total contact or Moulded insoles - taking a cast with the patient partially or fully WBing
Functional or Biomechanical orthosis - cast taken in corrected position of subtalar joint neutral & mid-tarsal full pronation
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