Hallux (Big Toe) Limitus & Rigidus Series
Part 8A Arch Height and Effects on Hallux Limitus and Rigidus
We mentioned pes planus (flat feet) and pes cavus (high arch) in regard to Hallux Limitus & Rigidus in previous posts, both contribute to or worsen Hallux Limitus & Rigidus, but in different ways. Let’s compare!
1. Flat Feet (Pes Planus)
– Excessive pronation (foot rolling inward) can lead to abnormal forces on the first MTP joint, accelerating degeneration over time and cause inflammation or early cartilage wear. It can also contribute to first ray dysfunctions and mobility of the hallux (Big Toe)
– These can accelerate the development of Hallux Limitus, and in more severe cases lead to Hallux Rigidus.
Management:
– Orthotics with arch support can help correct alignment and reduce pressure on the first MTP joint.
– Footwear with proper arch support and motion control is essential.
2. High Arches (Pes Cavus)
– This has excessive supination (outward rolling) This can lead to weight not being distributed evenly across the foot. This can place more pressure on the first MTP joint during push-off.
– The lack of shock absorption in high arched feet can increase the stress on the joint, contributing to early degenerative changes and hallux stiffness. Increased load on the first ray and excessive pressure on the first metatarsal, cause overuse of the joint and lead to potential Hallux Limitus or Rigidus.
Management:
– Custom orthotics that cushion the arch and provide even distribution of pressure across the foot can help manage the issue.
– Shock-absorbing insoles and flexible shoes can help improve foot mechanics.
Summary of Foot Type Impacts on Hallux Limitus/Rigidus:
– Flat Feet: Likely to cause Hallux Limitus due to excessive pronation and misalignment, which accelerates joint wear.
– High Arches: Likely to contribute to Hallux Limitus due to supination and excessive pressure on the first MTP joint, leading to stiffness over time.
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