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.
Many health conditions can create a painful flatfoot, an injury to the ligaments in the foot can cause the joints to fall out of alignment. The ligaments support the bones and prevent them from moving. If the ligaments are torn, the foot will become flat and painful. This more commonly occurs in the middle of the foot (Lisfranc injury), but can also occur in the back of the foot. In addition to ligament injuries, fractures and dislocations of the bones in the midfoot can also lead to a flatfoot deformity.
Posterior tibial tendon insufficiency is divided into stages by most foot and ankle specialists. In stage I, there is pain along the posterior tibial tendon without deformity or collapse of the arch. The patient has the somewhat flat or normal-appearing foot they have always had. In stage II, deformity from the condition has started to occur, resulting in some collapse of the arch, which may or may not be noticeable. The patient may feel it as a weakness in the arch. Many patients initially present in stage II, as the ligament failure can occur at the same time as the tendon failure and therefore deformity can already be occurring as the tendon is becoming symptomatic. In stage III, the deformity has progressed to the extent where the foot becomes fixed (rigid) in its deformed position. Finally, in stage IV, deformity occurs at the ankle in addition to the deformity in the foot.
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
Treatment will vary depending on the degree of your symptoms. Generally, we would use a combination of rest, immobilization, orthotics, braces, and physical therapy to start. The goal is to keep swelling and inflammation under control and limit the stress on the tendon while it heals. Avoidance of activities that stress the tendon will be necessary. Once the tendon heals and you resume activity, physical therapy will further strengthen the injured tendon and help restore flexibility. Surgery may be necessary if the tendon is torn or does not respond to these conservative treatment methods. Your posterior tibial tendon is vital for normal walking. When it is injured in any way, you risk losing independence and mobility. Keep your foot health a top priority and address any pain or problems quickly. Even minor symptoms could progress into chronic problems, so don?t ignore your foot pain.
Surgery should only be done if the pain does not get better after a few months of conservative treatment. The type of surgery depends on the stage of the PTTD disease. It it also dictated by where tendonitis is located and how much the tendon is damaged. Surgical reconstruction can be extremely complex. Some of the common surgeries include. Tenosynovectomy, removing the inflamed tendon sheath around the PTT. Tendon Transfer, to augment the function of the diseased posterior tibial tendon with a neighbouring tendon. Calcaneo-osteotomy, sometimes the heel bone needs to be corrected to get a better heel bone alignment. Fusion of the Joints, if osteoarthritis of the foot has set in, fusion of the joints may be necessary.