ARTHRITIS OF THE MID FOOT
What is this?
Degenerative changes in the joints of the middle part of the foot, usually resulting from trauma to the area (fractures, dislocations or sprains), from other deformities (such as flat feet) or from inflammatory causes. The cartilage lining the joint surfaces becomes damaged and results in pain and stiffness.
Patients typically have pain on the top of the foot in the middle section, which can be worse in the morning and progresses with prolonged weight-bearing. There is associated swelling and with time more obvious deformities in the foot can develop.
Initial pain relief can be achieved with analgesics, non-steroidal anti-inflammatory medications, modification of footwear and activities, as well as orthotics to off-load the painful area. Depending on the patient, weight loss may help reduce the pressure in this area, as
well as physiotherapy to keep the joints supple and surrounding muscles strong.
If these measures fail to resolve the symptoms, a corticosteroid injection into the joint may be of benefit to help control pain and allow activities to continue.
This depends on the stage of the arthritic process. If the arthritis is mild-to-moderate, with the pain resulting from the pressure effect
of bone spurs present it is reasonable to remove these to help with the symptoms.
However, if there is rigidity of movements and the arthritis is more advanced, the operative option is to fuse the joints affected to alleviate the pain. With this procedure the joint is prepared, by removing any remaining cartilage tissue and hard (sclerotic bone) and joining the bones on either side of the joint together. This is usually held with either screws, plates, staples or a combination of these. Once healed the joint remains stiff and therefore the pain resolves
as the joint surfaces no longer rub against each other.
As with any surgery there are potential risks. This will be discussed in more detail during the consultation, however common complications are stiffness, swelling, nerve injury, infection, non-union, under correction and over correction of positions and prothesis loosening.
If a bone spur removal is performed, your foot will be in bandaging and a surgical shoe will be provided to allow you to weight-bear whilst protecting the foot. You will be provided with crutches for support. Elevation, as much as possible, is important in the first few weeks. The bandaging will come down at 2 weeks and dressings changed. You can go back to wearing comfortable shoes at this
stage. Return to work can be considered at this stage if the wound
is fully healed.
If a fusion procedure has been performed your leg will be placed in a below-knee cast for 2 weeks, at which stage a wound check will be performed and a complete below-knee cast applied for a further 4 weeks. For this initial 6 weeks no weight-bearing will be allowed, and crutches will be supplied for support. Elevation, above the heart level, as much as possible, is important. After 6 weeks, a walking boot will be applied, and weight-bearing will be permitted in the boot for 6 weeks and physiotherapy instigated.
Swelling can be expected to be present for up to 6 months, particularly in the evenings.
With regards to return to work, it is dependent on the amount of weightbearing required. If the work is sedentary and you can keep the foot elevated, then return after 6 weeks is satisfactory. Otherwise, return to work should be expected after 10-12 weeks.