GALLERY: APC Late Model Series at Sunset Speedway Greg MacPherson / Inside Track Motorsport News

GALLERY: APC Late Model Series at Sunset Speedway Featured

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The APC Late Model Series kicked off its 2017 season on Saturday, May 27 at Sunset Speedway.

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  • Comment Link MichaelMam %AM, %18 %226 %2017 %00:%Jul posted by MichaelMam

    Overview
    For most people with an accessory navicular, the extra bone does not cause any problems and most are unaware of its presence. But certain activities or circumstances may cause the extra bone or the tibialis posterior tendon that contains it to grow irritated. This is called accessory navicular syndrome, and its possible causes include sprains, overuse, or wearing shoes that constantly rub against the bone. Individuals who have a collapsed arch (commonly known as flat feet) may be at greater risk of accessory navicular syndrome, assuming they have the extra bone, because of the added daily trauma placed on the tibialis posterior tendon.



    Causes
    Most of the time, this condition is asymptomatic and people may live their whole lives unaware that they even have this extra bone. The main reason the accessory navicular bone becomes problematic is when pain occurs. There is no need for intervention if there is no pain. The accessory navicular bone is easily felt in the medial arch because it forms a bony prominence there. Pain may occur if the accessory bone is overly large causing this bump on the instep to rub against footwear.

    Symptoms
    It?s common for any symptoms to present during adolescence, when bones are maturing, though problems may not occur until adulthood. You may notice a bony prominence on the inner side of the midfoot. There may or may not be redness and swelling around this bump, especially if it rubs against footwear. You may be prone to blisters or sores in the area. Pain generally involves a vague ache or throbbing in the midfoot and arch as well, especially when you?re active. Many people with this syndrome develop flat feet, too, which can create additional strain in the foot.

    Diagnosis
    To diagnose accessory navicular syndrome, the foot and ankle surgeon will ask about symptoms and examine the foot, looking for skin irritation or swelling. The doctor may press on the bony prominence to assess the area for discomfort. Foot structure, muscle strength, joint motion, and the way the patient walks may also be evaluated. X-rays are usually ordered to confirm the diagnosis. If there is ongoing pain or inflammation, an MRI or other advanced imaging tests may be used to further evaluate the condition.

    Non Surgical Treatment
    Excess weight will increase the force on the posterior tibial tendon as it inserts into the accessory navicular and will tend to precipitate or aggravate symptoms. If a patient with a symptomatic accessory navicular is overweight, then losing weight can be very helpful. Even losing 5-10lbs will decrease the amount of force going through the foot with each step by as much as 15-30lbs. This is because the foot acts like a lever serving to magnify the force absorbed by the foot with each step.



    Surgical Treatment
    If non-surgical treatment fails to relieve the symptoms of accessory navicular syndrome, surgery may be appropriate. Surgery may involve removing the accessory bone, reshaping the area, and repairing the posterior tibial tendon to improve its function. This extra bone is not needed for normal foot function.

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