What Is Posterior Tibial Tendon Dysfunction ?

Overview
When we have foot pain, it isn?t always easy to pinpoint the source because we can?t visualize the structure of all the bones, muscles, and tendons on the inside. The posterior tibial tendon plays an important supportive role within the structure of the foot. It attaches to your calf muscle and then comes down along the inside of your ankle, connecting to the bones inside your foot at the other side. This tendon?s main function is to hold up your arch and support your foot during each and every movement. Every step, run, walk, or jump is made possible with the support from this crucial tendon. While it is designed to perform such an important role, it is vulnerable to stress and injury. A tear during a traumatic injury or stress from overuse can injure the tissues within the tendon. This kind of injury is referred to as posterior tibial tendon dysfunction (PTTD). A really hard fall during a sports game or exposure to a repetitive motion, such as the impact on feet during soccer, tennis, football or basketball, can cause an injury. Flat foot and flat feet in adults can exacerbate this condition. The tendon can experience small tears and become inflamed. If the inflammation is allowed to continue and worsen over time, it will weaken further and could rupture completely.

Causes
Obesity - Overtime if your body is carrying those extra pounds, you can potentially injure your feet. The extra weight puts pressure on the ligaments that support your feet. Also being over weight can lead to type two diabetes which also can attribute to AAFD. Diabetes - Diabetes can also play a role in Adult Acquired Flatfoot Deformity. Diabetes can cause damage to ligaments, which support your feet and other bones in your body. In addition to damaged ligaments, uncontrolled diabetes can lead to ulcers on your feet. When the arches fall in the feet, the front of the foot is wider, and outer aspects of the foot can start to rub in your shoe wear. Patients with uncontrolled diabetes may not notice or have symptoms of pain due to nerve damage. Diabetic patient don?t see they have a problem, and other complications occur in the feet such as ulcers and wounds. Hypertension - High blood pressure cause arteries narrow overtime, which could decrease blood flow to ligaments. The blood flow to the ligaments is what keeps the foot arches healthy, and supportive. Arthritis - Arthritis can form in an old injury overtime this can lead to flatfeet as well. Arthritis is painful as well which contributes to the increased pain of AAFD. Injury - Injuries are a common reason as well for AAFD. Stress from impact sports. Ligament damage from injury can cause the bones of the foot to fallout of ailment. Overtime the ligaments will tear and result in complete flattening of feet.

Symptoms
Symptoms are minor and may go unnoticed, Pain dominates, rather than deformity. Minor swelling may be visible along the course of the tendon. Pain and swelling along the course of the tendon. Visible decrease in arch height. Aduction of the forefoot on rearfoot. Subluxed tali and navicular joints. Deformation at this point is still flexible. Considerable deformity and weakness. Significant pain. Arthritic changes in the tarsal joints. Deformation at this point is rigid.

Diagnosis
Although you can do the "wet test" at home, a thorough examination by a doctor will be needed to identify why the flatfoot developed. Possible causes include a congenital abnormality, a bone fracture or dislocation, a torn or stretched tendon, arthritis or neurologic weakness. For example, an inability to rise up on your toes while standing on the affected foot may indicate damage to the posterior tibial tendon (PTT), which supports the heel and forms the arch. If "too many toes" show on the outside of your foot when the doctor views you from the rear, your shinbone (tibia) may be sliding off the anklebone (talus), another indicator of damage to the PTT. Be sure to wear your regular shoes to the examination. An irregular wear pattern on the bottom of the shoe is another indicator of acquired adult flatfoot. Your physician may request X-rays to see how the bones of your feet are aligned. Muscle and tendon strength are tested by asking you to move the foot while the doctor holds it.

Non surgical Treatment
Nonoperative treatment of stage 1 and 2 acquired adult flatfoot deformity can be successful. General components of the treatment include the use of comfort shoes. Activity modification to avoid exacerbating activities. Weight loss if indicated. Specific components of treatment that over time can lead to marked improvement in symptoms include a high repetition, low resistance strengthening program. Appropriate bracing or a medial longitudinal arch support. If the posterior tibial tendon is intact, a series of exercises aimed at strengthening the elongated and dysfunctional tendon complex can be successful. In stage 2 deformities, this is combined with an ankle brace for a period of 2-3 months until the symptoms resolve. At this point, the patient is transitioned to an orthotic insert which may help to support the arch. In patients with stage 1 deformity it may be possible to use an arch support immediately.

Surgical Treatment
Stage two deformities are less responsive to conservative therapies that can be effective in mild deformities. Bone procedures are necessary at this stage in order to recreate the arch and stabilize the foot. These procedures include isolated fusion procedures, bone grafts, and/or the repositioning of bones through cuts called osteotomies. The realigned bones are generally held in place with screws, pins, plates, or staples while the bone heals. A tendon transfer may or may not be utilized depending on the condition of the posterior tibial tendon. Stage three deformities are better treated with surgical correction, in healthy patients. Patients that are unable to tolerate surgery or the prolonged healing period are better served with either arch supports known as orthotics or bracing such as the Richie Brace. Surgical correction at this stage usually requires fusion procedures such as a triple or double arthrodesis. This involves fusing the two or three major bones in the back of the foot together with screws or pins. The most common joints fused together are the subtalar joint, talonavicular joint, and the calcaneocuboid joint. By fusing the bones together the surgeon is able to correct structural deformity and alleviate arthritic pain. Tendon transfer procedures are usually not beneficial at this stage. Stage four deformities are treated similarly but with the addition of fusing the ankle joint.