Chopart sprain: definition, symptoms, causes, treatments

Definition of Chopart sprain

The Chopart sprain refers to ligament injuries specifically affecting the Chopart joint, which consists of the talonavicular and calcaneocuboid joints of the midfoot. This complex joint, connecting the anterior and posterior tarsus, plays a crucial role in the mobility and stability of the foot. Unlike the more common ankle sprains, Chopart sprains are less frequent and can often go unrecognized or be mistaken for other injuries. The injury mechanism of the Chopart sprain is similar to that of a sprain of the external ligamentous plane of the ankle.

This sprain usually occurs following indirect trauma, such as a violent twisting of the foot. It is distinguished by its location and by the type of pain it causes, often more intense and localized in the middle of the foot rather than around the ankle. Full weight bearing on the injured limb is initially impossible.

It is essential to identify this foot injury early to avoid complications such as chronic instability or post-traumatic deformities, which could result from delayed diagnosis or insufficient treatment. Systematic search for this sprain is important for effective treatment and optimal recovery.

Symptoms of Chopart sprain

Although less well-known than other traumatic foot injuries, Chopart sprain presents with distinct symptoms that require special attention to avoid complications. Here are the main symptoms to watch for:

• Severe foot pain: The first sign of a Chopart sprain is acute foot pain, often felt at the midtarsal joint. This pain may worsen when walking or when pressure is applied to the area.
• Swelling and bruising: Noticeable ankle swelling may occur, often accompanied by a bruise that can appear within 48 hours. This swelling is not only painful but can also significantly limit movement of the ankle and foot, especially in rotation.
• Difficulty walking: The pain and swelling can make walking extremely difficult or even impossible without assistance.
• Foot instability: You may feel that your foot is less stable and that you cannot support your weight as usual, which may indicate ligament involvement. Giving way of the affected lower limb is also possible, a sign of loss of muscle tone.

Early diagnosis and appropriate treatment are essential for optimal recovery.

Causes of Chopart sprain

The Chopart sprain affects the talonavicular and calcaneocuboid joints of the midfoot. This injury, often underdiagnosed, can be caused by several factors. Among the common causes, we note foot trauma, often resulting from a sudden twist or excessive force applied directly to the joint. This can occur during a sports accident, where sudden movements and direct impacts are common.

To prevent this condition, it is essential to wear shoes suited to the activity and to strengthen the muscles of the foot and ankle through specific exercises. Special attention should be paid to sports technique to minimize the risks of movements that could lead to this sprain. In addition, regular assessment by a professional can help identify and correct muscle imbalances or poor posture that increase the risk of injury.

Available treatments for Chopart sprain

Non-surgical approaches

The treatment of Chopart sprain is initially orthopedic, meaning non-surgical. It is necessary to immobilize the ankle ideally in a cast, or in a walking boot for a period of 45 days. During this period, it is advised to limit movements that put strain on the Chopart joints to promote ligament healing. The use of ice can also help reduce inflammation and pain if a walking boot is used for immobilization.

Rehabilitation of the footand ankle plays an important role in recovery. Physical therapy sessions are recommended to restore mobility, strengthen the muscles around the ankle and Chopart joint, and decrease the risk of aftereffects, especially chronic pain, residual instability, and chronic laxity leading to osteoarthritis. Specific exercises will be adapted to the healing process and aim to gradually improve foot function.

Surgical interventions

In some cases, when non-surgical treatments are not sufficient to restore stability and function of the Chopart, surgery may be necessary.

There are two main categories of surgical intervention for managing Chopart injuries: ligament repairs and reconstructions, and arthrodeses.

• Ligament repair is generally combined with ligament reconstruction using, for example, the plantaris tendon or surgical bands. These ligamentoplasty techniques are not well-known. Indications for Chopart ligament repair and reconstruction are much less frequent than those for ankle ligamentoplasties.
• In case of arthritic instability of the Chopart joints, blocking the painful joints is necessary, which involves fusing the painful joints, known as arthrodesis.

The decision to proceed with surgery depends on several factors, including the severity of the sprain, the response to conservative treatments, and the patient’s specific functional needs. It is essential to consult with an ankle and foot specialist to evaluate all options and choose the treatment best suited to your situation.

Conclusion

Chopard sprains are relatively uncommon, probably due to the initial diagnostic difficulty that tends to underestimate these injuries. In the absence of diagnosis, the injuries most often heal provided that the ankle and foot are immobilized for a sufficient length of time. If diagnosed initially, immobilization is recommended for 45 days with subsequent rehabilitation sessions. The risk is progression toward chronic instability, which may require surgical repair or ligament reconstruction procedures. Chronic instability or chronic laxity can lead to cartilage damage and post-traumatic osteoarthritis; in such cases, arthrodesis procedures may be considered. You can consult our orthopedic surgeons who can accurately assess your situation and offer the most appropriate treatment. Remember, taking care of your feet is essential.