Hallux Rigidus

01.04.2020

DEFINITION/FORMATION

When movement in the big toe joint is painfully restricted, the cause is often the development of osteoarthritis of the joint, a so-called hallux rigidus. This is a degenerative change in the joint with partial destruction of the joint cartilage and development of bony spurs (osteophytes) at the edge of the joint surfaces.
The change of the cartilage can lead to painful inflammation of the joint. The bony spurs and a too tight joint capsule can also reduce the range of motion.
As the osteoarthritis progresses, the joint increasingly stiffens.

Fig. 1: Bony Spurs (Osteophytes) and the Restriction of Mobility

SYMPTOMS

Most patients complain of pain in the big toe joint area. Typically, these are start- up pains which intensify during/after exertion. Occasionally, pain while resting can also occur. The movement restrictions are not noticeable for most patients as they develop slowly. Forced movement of the big toe, on the other hand, causes pain because bone rubs against bone and the inflamed capsule is overstretched. In the final stage, once the joint becomes completely stiff, the pain will disappear. This can take many years though.

EXAMINATION

The examination often reveals a swollen joint with noticeable thickening of the bone and sometimes even redness. The range of motion is painfully restricted in all directions. The normal rolling of the foot while walking barefoot is often no longer possible.

Fig. 2: X-ray image with osteophyte formation

The x-rays show the extent of the osteoarthritis (narrowing of the joint gap) and the bony spurs.

TREATMENT

A) Non Surgical
Depending on the severity of the symptoms, conservative treatments are suggested. These mainly focus on the mobilization and distraction of the toe through self- manipulation and/or physiotherapeutic support. Occasionally, a cortisone infiltration of the joint can be helpful. Wearing comfortable shoes with a rather firm sole usually causes less complaints because the movements in the arthrotic joint are restricted. We are cautious with prescribing insoles for stiff big toe joints. These insoles can change the gait pattern and cause pain in other places.
B) Surgical
If the osteoarthritis is already advanced or conservative treatments have been
unsuccessful, surgery is an appropriate treatment. There are various options:

Fig. 3: Movement increases after the Removal of the Osteophytes

Cheilectomy: In most cases we perform a so-called cheilectomy (removal of the bone spurs) (Fig. 3). The excess bone is removed, and the joint is made slightly more flexible. However, the goal of the operation is not primarily to normalize range of motion, but to reduce the pain. After the operation full weight bearing is allowed. The amount of weight bearing depends on the subjective pain. It is vital that the toe movement is practiced from thestart.

Osteotomy: If the toe has a pronounced restriction of movement mainly in one direction, a wedge of the bone can be removed. (Fig. 4). The bone is then fixed with a screw. The mobility gained in one direction (usually upwards) improves at the expense of the mobility in the other direction (usually downwards). After the operation full weight bearing is allowed as long as you are wearing a forefoot relief shoe (Fig. 6a). The amount of weight bearing depends on the subjective pain.

Abb. 4: Osteotomy

 

Arthrodesis:Inthecaseofsevereosteoarthritiswerecommendafusionofthe joint. Usually, a nearly complete spontaneous stiffness already exists in this situation. The difference is hardly noticeable to the patients after the operation, as even with a stiffened base joint, shoes with smaller heels can be worn and sport is not restricted. The fusion is done by using two screws or a small plate and screws. (Fig.5). You should not weight bear the foot for 6 weeks after the operation. Mobility and independence is possible using crutches and wearing a VACOpedes shoe (Fig.6b). After 6 weeks weight bearing can be increased, and normal shoes can be worn. In rare cases there need to be minor adjustments done to everyday shoes.

Fig. 5: Arthrodesis

RISKS AND COMPLICATIONS

Complications and risks can occur during or after the operation, delaying the healing process or requiring another operation. Even though they are rare for foot operations, they can never be completely ruled out.
In summary, these are:

  • Healing disorders
  • Infections
  • Vascular injuries, post-operative bleeding, hematoma, blood loss
  • Nerve injury
  • Non Union (lack of bone healing)
  • Bothering implants (screws, plates)
  • Thrombosis, embolism
  • Residual symptoms

FOLLOW-UP TREATMENT

The surgery is only a part of the whole treatment. Follow-up treatment contributes significantly to its success. It is important that you know what you should be aware of and what you should possibly avoid.

Dressing and Wound Care
During the time in the hospital you will be shown how to take care of the wound. As long as the wound is not completely dry (wound secretions/blood), the dressing should be changed daily. Do not apply any ointments or powder directly to the surface of the wound until the stitches have been removed! Disinfection is not necessary. Always remove the entire dressing when changing. The new dressing must be dry and must not slip.
Once the wound is dry, a normal bandage (quick bandage) is sufficient. An elastic bandage can protect and cushion the operated area. This will also reduce the swelling that is still present. If you are not sure whether everything is normal, you can contact your family doctor or contact us directly.
The stitches can be removed about 2 weeks after the operation, this is usually done by the family doctor.

Swelling and Pain
After an operation, the affected foot is always more or less swollen. This swelling can recur for weeks (for up to 6 months). The most effective measure to prevent this is to elevate the leg. At home, the foot should be elevated often during the first few weeks. It also makes sense to move several times a day (walking, not as much standing) but only for a short time. It is time to elevate the leg if the foot is tense and starts to hurt again.
It is important to know that the foot generally tends to swell after foot operations. This reaction is normal and disappears after 6 to 12 months.
Pain in the operated foot can occur in the first few days and weeks after the operation despite these measures. However, to relieve the pain, you can take the pain medication prescribed to you.

Pressure
The permitted pressure on the foot depends on the operation performed. You received a special shoe to protect and simplify your mobility (Fig. 6). Depending on the operation performed, either partial weight bearing was recommended, or full weight bearing was allowed. In the first 2 weeks, partial weight bearing is usually recommended until the wound has healed.

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