Pes Planus


Pes Planus describes a hyperpronated foot posture that occurs during the stance phase of gait. This complete collapse of the medial longitudinal arch causes unhealthy movement of joints outside of their functional range of motion.

This microtraumatic action step after step leads to osteoarthritic changes, hallux valgus, plantar fascia tension and postural malfunction throughout the kinetic chain.


What are the biomechanical causes of Pes Planus?

Deformities tend to be flexible or rigid in nature. 

Flexible flat foot occurs due to connective tissue failure of the foot joint complex. Whether through repeat injury, trauma, health issues or age, the ligamentous structures often lose their ability to repair even with the best rehabilitation programs.

Such a patient will appear to have a healthy medial arch in open-chain posture but a full collapse under weightbearing.

Rigid flat foot is the result of bony deformation changes and can be coupled with other conditions. This foot offers little forefoot flexibility and is held in a pronated position during both open and closed-chain posture.

MASS4D® helps Pes Planus with an active rehabilitation program

Pes planus is best treated with active protocols including gastrocnemius and soleus stretching, anterior compartment strengthening to reintroduce muscle spindle firing and appropriate treatment for secondary symptomatology up the kinetic chain.

MASS4D® calibrated custom shell enhances the proprioceptive input throughout the lower limbs to hasten rehabilitation. Calibration parameters incorporate the wearer's bodyweight coupled with their daily activities; this coupling is the keystone in accounting for the results of Newton’s third law effect to the body during lifting of weights or repetitive jumping/running.

Forefoot flexibility is also a critical component in calibration and will vary significantly from flexible to rigid pes planus diagnosis.

MASS4D® is built to ensure every step enhances the wearer's neuroplasticity as it relates to gait, biomechanics and balance. While foam orthotics provide cushioning, they absorb body weight, dampen nerve firing potential and lead to a full collapse situation. 

Recommended Links

How Medial Arch Height is an important factor for postural abnormality
What to Look for in Gait Analysis

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