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Big Toe Arthritis

Big Toe Arthritis: Is It Hallux Limitus or Hallux Rigidus?

The big toe provides one of the most important functions of our entire body when it comes to movement. In fact, the it carries the most weight of all the toes, bearing about 40 percent of our body weight. The big toe is also the last part of the foot to push off the ground before taking the next step.

With our reliance on our big toe comes two common foot conditions: hallux limitus and hallux rigidus. These two conditions are the medical terms for big toe arthritis. Specifically, they can be translated into the following from Latin: hallux = big toe; limitus = limitation; rigidus = rigid/stiff.

Big toe arthritis can be quite painful both because of the toe’s weight-bearing responsibilities and the fact that we as humans are constantly on our feet. One giveaway sign of hallux rigidus is the presence of a bone spur on the top of the foot.

In this article, we break down the differences between the two halluxes, signs and symptoms, as well as non-surgical and surgical treatments.

Hallux Limitus: What Is It?

Let’s start with hallux limitus since it’s the earlier stage of hallux rigidus.

Hallux limitus is a condition in which the joint connecting your big toe to your foot (the first metatarsophalangeal joint – commonly called the first MTP joint) is inflamed, sore, and stiff. This condition is a form of degenerative arthritis (wear-and-tear of the cartilage within the joint) that occurs in the joint.

There are a few reasons why and how this condition develops:

  • Fallen arches: Fallen arches put excessive pressure on the big toe joint.
  • Excessive pronation: Excessive pronation puts excessive pressure on the big toe joint.
  • Overuse: Activities like running, doing lunges, or any excessive pressure to the toe joint can over time break down the joint.
  • Acute injury: stubbing or jamming your toe can damage the joint, and can worsen if you don’t allow it adequate time to recover.

Hallux Rigidus: What Is It?

Hallux rigidus involves more progressive damage to the first metatarsophalangeal joint. This condition comes after hallux limitus. It means your joint has less range of motion, the cartilage is worn down, and there is likely the presence of osteophytes, also known as a bone spur. An osteophyte is a bony lump that grows around the joints.

In fact, hallux rigidus is the most common degenerative disorder of the foot.

So, what’s the difference? Hallux rigidus is defined as pain due to an arthritic joint, whereas hallux limitus is defined as functional pain due to soft tissue tightness (i.e., when calf tightness limits the motion of the ankle joint) or a long and elevated first metatarsal bone (the bone behind the big toe).

These are the early signs and symptoms of hallux rigidus:

  • Pain and stiffness in the big toe during physical activity (walking, running, etc.).
  • Pain and stiffness aggravated by cold, damp weather.
  • Difficulty with certain activities (running, squatting).
  • Swelling and inflammation around the joint.
  • Loss of range of motion.

Depending on the severity of arthritis, the joint damage can be measured by the approximate range of motion of the big toe joint. Here is a breakdown:

  • Grade 0: 40° to 60° range of motion and/or 10% to 20% loss of range of motion.
  • Grade 1: 30° to 40° range of motion and/or 20% to 50% loss of range of motion.
  • Grade 2: 10° to 30° range of motion and/or 50% to 75% loss of range of motion.
  • Grade 3: ≤ 10° range of motion  and/or 75% to 100% loss of range of motion.
  • Grade 4: Same as in grade 3 with more pain.

Does Hallux Rigidus Go Away?

Hallux rigidus is a progressive condition. It doesn’t go away. However, there are a number of steps you can take (literally) to slow down the worsening of this toe condition. Treatment includes altering your footwear for shoes with firm supportive footbeds or rocker soles, avoiding activity that puts pressure on your big toe joint, and avoiding walking barefoot.

Is Walking Good For Hallux Rigidus?

Walking with the proper precautions and equipment should be OK with hallux rigidus. Walking in some cases, like with hallux limitus, can actually increase the range of motion. With hallux rigidus, the aim shouldn’t be to increase range of motion but to reduce dorsiflexion (the action of raising your foot your toes upward). In this case, walking uphill can be painful. Walking barefoot can also be painful as there’s nothing to protect the joint.

Do Orthotics Help Hallux Limitus and Hallux Rigidus?

Custom foot orthotics can provide multiple benefits for big toe arthritis. For hallux limitus, the goal of orthotics is to improve the range of motion within the first MTP joint. Conversely, for those with hallux rigidus, the goal of orthotics is to restrict the range of motion. Therefore, different orthotics are designed for different use cases and the severity of arthritis. As those with fallen arches or excessive pronation are particularly susceptible to developing hallux rigidus, custom orthotics to correct these biomechanical abnormalities can also help.

One such approach is using Morton’s extension or a reverse Morton’s extension on a supportive orthotic. This approach utilizes a stiff orthotic material that extends under the big toe from the base to the tip. The goal here is to shift weight off of the weight-bearing joint of the big toe.

Additional measures beyond orthotics include shoe modifications. Shoes should be sufficiently long, comfortable, with a high and broad toe box, and should have enough space for the orthotic device. Additionally, shoes with a full-length carbon plate or built-in rocker sole can reduce pressure on the big toe, and should be explored as an option.

How Successful is Surgery For Hallux Limitus and Hallux Rigidus?

There are two primary surgical procedures to treat big toe arthritis: a cheilectomy and a first MTP joint fusion. A newer surgical procedure is emerging as well, in which an artificial joint (Cartiva) is inserted to replace the damaged joint. Orthopedic surgeons perform these operations. In general, non-surgical procedures should be explored and exhausted before proceeding to surgery. But, in some advanced cases, patients can greatly benefit.

Cheilectomy

A cheilectomy is a surgical procedure to remove excess bone from the joint of your big toe. It’s used for mild-to-moderate cases of hallux rigidus. The intention is to decompress the joint area by removing the excess volume of bone. The most common form of a cheilectomy is to create a keyhole incision at the top of the foot, where a tool is inserted to remove the bone spur. This procedure is typically done under local and general anesthesia. Although the range of motion won’t necessarily be improved, the removal of the bump can help reduce pain and discomfort.

The procedure typically takes less than 30 minutes and patients can be in and out of the surgical facility within 2-3 hours. Initial recovery includes two weeks in a soft cast and wearing an orthopedic sandal with light weight-bearing activity. The cast and stitches are removed roughly two weeks post-op. Long-term recovery includes returning to activity within 4-6 weeks although swelling and pain can resume for up to six months.

First MTP joint fusion

In a first MTP joint fusion, the bones are joined (fused) together permanently so they cannot rub against each other and cause pain. This operation is typically performed for moderate-to-serious cases of hallux rigidus when osteoarthritis has severely damaged the first metatarsophalangeal (MTP) joint.

Similar to a cheilectomy, an incision is made on the top of the big toe, and cartilage is cleared away to allow the two bones to heal together. For this operation, the two bones are fused together using screws and/or plates. This permanent procedure reduces all range of motion but eliminates the pain-causing joint.

Post-op, you’ll be examined at the two-week, six-week, three-month, and six-month intervals. X-rays may be taken as well to assess the growth of the fused bones. You can expect recovery to last up to six months.

From Orthotics to Foot Treatment, We’ve Got You Covered!

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