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Sesamoids act like pulleys. They provide a smooth surface over which the tendons slide, thus increasing the ability of the tendons to transmit muscle forces. The sesamoids in the forefoot also assist with weightbearing and help elevate the bones of the great toe. Like other bones, sesamoids can break (fracture). Additionally, the tendons surrounding the sesamoids can become irritated or inflamed. This is called sesamoiditis and is a form of tendinitis. It is common among ballet dancers, runners and baseball catchers.
Signs and Symptoms
Pain is focused under the great toe on the ball of the foot. With sesamoiditis, pain may develop gradually; with a fracture, pain will be immediate.
Swelling and bruising may or may not be present.
You may experience difficulty and pain in bending and straightening the great toe.
Examination and diagnosis
During the examination, the physician will look for tenderness at the sesamoid bones. Your doctor may manipulate the bone slightly or ask you to bend and straighten the toe. He or she may also bend the great toe up toward the top of the foot to see if the pain intensifies.
Your physician will request X-rays of the forefoot to ensure a proper diagnosis. In many people, the sesamoid bone nearer the center of the foot (the medial sesamoid) has two parts (bipartite). Because the edges of a bipartite medial sesamoid are generally smooth, and the edges of a fractured sesamoid are generally jagged, an X-ray is useful in making an appropriate diagnosis. Your physician may also request X-rays of the other foot to compare the bone structure. If the X-rays appear normal, the physician may request a bone scan.
Treatment is generally nonoperative. However, if conservative measures fail, your physician may recommend surgery to remove the sesamoid bone. The doctors at Feet for Life do NOT recommend surgery for this problem. The use of ESWT has been close to 100% successful for this problem. For more details regarding NON-SURGICAL treatment click here.
- Stop the activity causing the pain.
- Take aspirin or ibuprofen to relieve the pain.
- Rest and ice the sole of your feet. Do not apply ice directly to the skin, but use an ice pack or wrap the ice in a towel.
- Wear soft-soled, low-heeled shoes. Stiff-soled shoes like clogs may also be comfortable.
- Use a felt cushioning pad to relieve stress.
- Return to activity gradually, and continue to wear a cushioning pad of dense foam rubber under the sesamoids to support them. Avoid activities that put your weight on the balls of the feet.
- Tape the great toe so that it remains bent slightly downward (plantar flexion).
- Your doctor may recommend an injection of a steroid medication to reduce swelling.
- If symptoms persist, you may need to wear a removable short leg fracture brace for 4 to 6 weeks.
Fracture of the sesamoid
- You will need to wear a stiff-soled shoe or a short, leg-fracture brace.
- Your physician may tape the joint to limit movement of the great toe.
- You may have to wear a J-shaped pad around the area of the sesamoid to relieve pressure as the fracture heals.
- Pain relievers such as aspirin or ibuprofen may be recommended.
- It may take several months for the discomfort to subside.
- Cushioning pads or other orthotic devices are often helpful as the fracture heals.
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