Flatfoot (pes planus) is a condition that occurs when the arch or instep of the foot collapses or touches the standing surface. It is also known as fallen arches or pronation of the feet. The human foot is made up of 26 bones, 33 joints, and over 100 muscles, tendons and ligaments. The arch of the foot is created by tightening of the muscles and various ligaments that support the bones of the arch as well as ligaments that run from the heel to the ball of the foot. The arches distribute weight evenly across the feet and up the legs, and can affect walking. A well-developed arch is balanced between rigidity (for stability) and flexibility (for adapting to surfaces).
Having low or no arches is normal for some people. In these cases, flat feet are usually inherited and the feet are fairly flexible. Occasionally, flat feet can be caused by an abnormality that develops in the womb, such as a problem with a joint or where two or more bones are fused together. This is known as tarsal coalition and results in the feet being flat and stiff. Flat feet that develop in later life can be caused by a condition that affects the joints, such as arthritis, or an injury to a muscle, tendon or joint in the foot. Conditions that affect the nervous system (brain and spinal cord) can also cause the arches to fall. Over time, the muscles gradually become stiffer and weaker and lose their flexibility. Conditions where this can occur include cerebral palsy, spina bifida and muscular dystrophy. Adult-acquired flat feet often affect women over 40 years of age. It often goes undiagnosed and develops when the tendon that supports the foot arch gradually stretches over time. It's not fully understood what causes the tendon to become stretched, but some experts believe that wearing high heels and standing or walking for long periods may play a part. Obesity, high blood pressure (hypertension) and diabetes are all risk factors. Recent research has found a link with changes to the tendon in the foot and an increase in a type of protein called proteolytic enzyme. These enzymes can break down some areas of the tendon, weakening it and causing the foot arch to fall. Similar changes are also seen in other conditions, such as Achilles tendonitis. This could have important implications for treating flat feet because medication that specifically targets these enzymes could provide an alternative to surgery. However, further research is needed and this type of treatment is thought to be about 10 to 15 years away.
Most people do not exhibit any symptoms of flat feet, but if the condition is due to an underlying problem, symptoms can include foot pain, mainly in the arch or heel areas, difficulty standing on tiptoes, swelling that occurs on the inside of the ankle, pain in the calf, knee, hip, or lower leg area, both feet lie flat on the ground with no gap, Shoes may not fit properly, heel may tilt away from the midline of the body more than usual, absence of foot arch when standing. If you are experiencing these symptoms and have flat feet, you should consider seeing your doctor or a podiatrist immediately for an examination.
An examination of the foot is enough for the health care provider to diagnose flat foot. However, the cause must be determined. If an arch develops when the patient stands on his or her toes, the flat foot is called flexible and no treatment or further work-up is necessary. If there is pain associated with the foot or if the arch does not develop with toe-standing, x-rays are necessary. If a tarsal coalition is suspected, a CT scan is often ordered. If a posterior tibial tendon injury is suspected, your health care provider may recommend an MRI.
pes planus treatment
Non Surgical Treatment
The simplest form of treatment is the use of custom fitted orthotics. For this, it is best to see a podiatrist, who is a trained medical professional that assesses feet and gives you a prescription for the orthotic. If the orthotics do not work - or if the deformity is very severe - then surgical management may be needed. There is a very wide range of procedures available, with varying downtimes and complexity. The simplest procedure of all is a simple calf release. This can be done at the back of the knee or the calf, and has a very quick recovery. It is a day-surgery procedure, and the patient can walk immediately after the surgery without the need for a cast. Recovery back to jogging can be as early as three weeks. The calf release stops the deforming force but obviously does not correct the arch itself. It is usually done in combination with some of the other procedures mentioned below. Done by itself, the patient will probably still require orthotics but by releasing the calf, it allows the orthotics to be much more effective. The other end of the spectrum is a complete reconstruction of the arch with bone work and screws to fuse joints.
Fallen arches may occur with deformities of the foot bones. Tarsal coalition is a congenital condition in which the bones of the foot do not separate from one another during development in the womb. A child with tarsal coalition exhibits a rigid flat foot, which can be painful, notes the patient information website eOrthopod. Surgery may prove necessary to separate the bones. Other foot and ankle conditions that cause fallen arches may also require surgery if noninvasive treatments fail to alleviate pain and restore normal function.