Just as an old bridge would become unsafe as the structure was compromised, your feet can experience the same. If you have PTTD and the tendon continues to weaken, it simply won?t be able hold up your arch. In this situation, the arch can fall or collapse, which is referred to as adult-acquired flat foot. You may experience pain and tenderness behind the inside of the ankle. Over time, in addition to the flattening of the foot, you may also notice a misalignment of the heel so that it no longer aligns underneath the rest of the leg. A tightening of the heel cord, arthritis, and possible deformity of the ankle joint may also occur. You may feel the discomfort move from the inside to the outside of the ankle as well. Flat foot can also contribute to problems with the plantar fascia, which is the tendon that runs along the length of your arch.
Overuse of the posterior tibial tendon is often the cause of PTTD. In fact, the symptoms usually occur after activities that involve the tendon, such as running, walking, hiking, or climbing stairs.
The symptoms of PTTD may include pain, swelling, a flattening of the arch, and an inward rolling of the ankle. As the condition progresses, the symptoms will change. For example, when PTTD initially develops, there is pain on the inside of the foot and ankle (along the course of the tendon). In addition, the area may be red, warm, and swollen. Later, as the arch begins to flatten, there may still be pain on the inside of the foot and ankle. But at this point, the foot and toes begin to turn outward and the ankle rolls inward. As PTTD becomes more advanced, the arch flattens even more and the pain often shifts to the outside of the foot, below the ankle. The tendon has deteriorated considerably and arthritis often develops in the foot. In more severe cases, arthritis may also develop in the ankle.
Looking at the patient when they stand will usually demonstrate a flatfoot deformity (marked flattening of the medial longitudinal arch). The front part of the foot (forefoot) is often splayed out to the side. This leads to the presence of a ?too many toes? sign. This sign is present when the toes can be seen from directly behind the patient. The gait is often somewhat flatfooted as the patient has the dysfunctional posterior tibial tendon can no longer stabilize the arch of the foot. The physician?s touch will often demonstrate tenderness and sometimes swelling over the inside of the ankle just below the bony prominence (the medial malleolus). There may also be pain in the outside aspect of the ankle. This pain originates from impingement or compression of two tendons between the outside ankle bone (fibula) and the heel bone (calcaneus) when the patient is standing.
Non surgical Treatment
Treating PTTD is almost always easier the earlier you catch it. So, the first step in treatment is to see your doctor as soon as you begin experiencing painful symptoms. However, once your condition has been diagnosed, your podiatrist will likely try to give the upset tendon a bit of a break so it?ll calm down and stop being so painful. This can often be accomplished by immobilizing the foot using tape and padding, braces, or casts, depending on what your podiatrist believes will work best for you, and depending on the severity of your condition. You may also be instructed to reduce inflammation by applying ice to the area (usually 40 minutes on and 20 minutes off, with a thin towel between you and the ice). Or, you might take anti-inflammatory medications like ibuprofen (steroidal anti-inflammatory meds are actually likely to make this problem worse, and are not usually recommended in treating PTTD), or use ultrasound therapy. Once the inflammation has gone down a bit, your podiatrist may recommend using orthotics (prescription shoe inserts) to support your damaged arch. Ankle braces can also be helpful.
Many operations are available for the treatment of dysfunction of the posterior tibial tendon after a thorough program of non-operative treatment has failed. The type of operation that is selected is determined by the age, weight, and level of activity of the patient as well as the extent of the deformity. The clinical stages outlined previously are a useful guide to operative care (Table I). In general, the clinician should perform the least invasive procedure that will decrease pain and improve function. One should consider the effects of each procedure, particularly those of arthrodesis, on the function of the rest of the foot and ankle.