Also sometimes called "fallen arches", the condition of flat feet is characterized by a lack of appropriate arch in the inner foot. It can be a genetic condition or the result of improper body mechanics. Often the whole of the foot will contact the ground with little to no arch being present. Because a normal foot is structurally able to support the weight of the body thanks to the bone structure that comprises the arch, a flat foot often is unable to properly support this weight and will cause extreme pressure in the joints in the foot and above, such as the ankles, knees and hips. Other problems such as tendonitis, bunion and hammertoe deformities, arthritis of the foot joints, and chronic fatigue of the leg muscles can also result.
A Rigid Flat Foot may be congenital, where the arch never develops when growing. A Rigid Flat Foot can also be acquired due to disease processes involving inflammatory arthritis, neurological conditions such as Charcot neuro-arthropathy or trauma. A Flexible Flat Foot (fallen arches) may also be congenital where excessive pronation occurs for shock absorption. In some cases this condition may be the result of neurological disease or injury involving muscle weakness, hyper-mobile joints or ligament laxity. These conditions may allow for excessive pronation causing the arch to fall when weight bearing or during activity. Both of these foot types can result in posture mal-alignment involving the lower back, hips, knees and feet which may result in pain in those areas.
Depending on the cause of the flatfoot, a patient may experience one or more of the different symptoms below. Pain along the course of the posterior tibial tendon which lies on the inside of the foot and ankle. This can be associated with swelling on the inside of the ankle. Pain that is worse with activity. High intensity or impact activities, such as running, can be very difficult. Some patients can have difficulty walking or even standing for long periods of time. When the foot collapses, the heel bone may shift position and put pressure on the outside ankle bone (fibula). This can cause pain on the outside of the ankle. Arthritis in the heel also causes this same type of pain. Patients with an old injury or arthritis in the middle of the foot can have painful, bony bumps on the top and inside of the foot. These make shoewear very difficult. Occasionally, the bony spurs are so large that they pinch the nerves which can result in numbness and tingling on the top of the foot and into the toes. Diabetics may only notice swelling or a large bump on the bottom of the foot. Because their sensation is affected, people with diabetes may not have any pain. The large bump can cause skin problems and an ulcer (a sore that does not heal) may develop if proper diabetic shoewear is not used.
Runners are often advised to get a gait analysis to determine what type of foot they have and so what kind of running shoe they require. This shouldn?t stop at runners. Anyone that plays sports could benefit from this assessment. Sports shoes such as football boots, astro trainers and squash trainers often have very poor arch support and so for the 60-80% of us who do overpronate or have flat feet they are left unsupported. A change of footwear or the insertion of arch support insoles or orthotics can make a massive difference to your risk of injury, to general aches and pains and even to your performance.
Non Surgical Treatment
Orthotics. Interpod orthotics re-align and support the foot; therefore reducing any excessive stress when walking or during activity. Orthotics can assist with maintaining arch profile and allow for more effective functioning of joints. Footwear. A strong supportive, well fitted shoe may assist with reducing excessive pronation and support the joints of your feet. A supportive shoe will also help maximise the function of your Interpod orthotic. Padding may be applied to your shoes or feet by your practitioner to reduce excessive stress. Specific taping techniques can be applied by your practitioner to improve foot function. Your practitioner may advise certain stretches or exercises to assist with maintaining foot function and reduce painful symptoms. Pain medication such as NSAIDs (ibuprofen) may be advised by your practitioner. If all conservative options have been exhausted, then surgical correction of flat feet may be undertaken.
Since there are many different causes of flatfoot, the types of flatfoot reconstruction surgery are best categorized by the conditions. Posterior tibial tendon dysfunction. In this condition, the tendon connecting the calf muscle to the inner foot is torn or inflamed. Once the tendon is damaged it no longer can serve its main function of supporting the arch of the foot. Flatfoot is the main result of this type of condition and can be treated by the following flatfoot reconstruction surgeries. Lengthening of the Achilles tendon. Otherwise known as gastrocnemius recession, this procedure is used to lengthen the calf muscles in the leg. This surgery treats flatfoot and prevents it from returning in the future. This procedure is often combined with other surgeries to correct posterior tibial tendon dysfunction. Cleaning the tendon. Also known as tenosynovectomy, this procedure is used in the earlier and less severe stages of posterior tibial tendon dysfunction. It is performed before the arch collapses and while the tendon is only mildly affected. The inflamed tissue is cleaned away and removed from the remaining healthy tendon. Tendon transfer. This procedure is done to correct flatfoot and reform the lost arch in the foot. During the procedure, the diseased tendon is removed and replaced by tendon from another area of the foot. If the tendon is only partially damaged, the inflamed part is cleaned and removed then attached to a new tendon. Cutting and shifting bones. Also called an osteotomy, this procedure consists of cutting and reconstructing bones in the foot to reconstruct the arch. The heel bone and the midfoot are most likely reshaped to achieve this desired result. A bone graft may be used to fuse the bones or to lengthen the outside of the foot. Temporary instrumentation such as screws and plates can also be used to hold the bones together while they heal.
Time off work depends on the type of work as well as the surgical procedures performed. . A patient will be required to be non-weight bearing in a cast or splint and use crutches for four to twelve weeks. Usually a patient can return to work in one to two weeks if they are able to work while seated. If a person's job requires standing and walking, return to work may take several weeks. Complete recovery may take six months to a full year. Complications can occur as with all surgeries, but are minimized by strictly following your surgeon's post-operative instructions. The main complications include infection, bone that is slow to heal or does not heal, progression or reoccurrence of deformity, a stiff foot, and the need for further surgery. Many of the above complications can be avoided by only putting weight on the operative foot when allowed by your surgeon.