Treatment
Treatment for a Lisfranc injury depends on how severe the injury is.
Nonsurgical Treatment
If there are no fractures or dislocations in the joint and the ligaments are not completely torn, nonsurgical treatment may be all that is necessary for healing.
A nonsurgical treatment plan includes wearing a non-weightbearing cast for 6 weeks. You must be very strict about not putting weight on your injured foot during this period. This then progresses to weightbearing in a removable cast boot or an orthotic.
Your doctor will want to follow up with you regularly and take additional x-rays to make sure your foot is healing well. In the course of follow up, if there is any evidence that the bones in the injured joint have moved, then surgery will be needed to put the bones back in place.
Surgical TreatmentSurgery is recommended for all injuries with a fracture in the joints of the midfoot or with abnormal positioning (subluxation) of the joints. The goal of surgical treatment is to realign the joints and return the broken (fractured) bone fragments to a normal position.
Internal fixation.
In this procedure, the bones are positioned correctly (reduced) and held in place with plates or screws. Because the plates or screws will be placed across joints that normally have some motion, some or all of this hardware may be removed at a later date. This can vary from 3 to 5 months after surgery, and is at the surgeon's discretion.
Occasionally, the hardware may break before it is removed. This is not unusual when screws or plates span bones that have some movement. Metal can fatigue and fail under these conditions, just as a paperclip will fail if bent repeatedly. Most often surgery is successful even if some of the hardware fails.
Fusion.
If the injury is severe and has damage that cannot be repaired, fusion may be recommended as the initial surgical procedure. A fusion is essentially a "welding" process. The basic idea is to fuse together the damaged bones so that they heal into a single, solid piece.
Lisfranc injuries that may require fusion include joints that cannot be repaired with screws or plates or when the ligaments are severely ruptured. The hardware will not need to be removed because the joints are fused and will not move after they heal.
Rehabilitation.
After either surgery (reduction or fusion), a period of nonweightbearing for 6 to 8 weeks is recommended in a cast or cast boot. Weightbearing is started while the patient is in the boot if the x-rays look appropriate after 6 to 8 weeks. The amount of weight a patient can put on their foot, as well as the distance the patient is allowed to walk, is at the surgeon's discretion. Impact activities, such as running and jumping, should be avoided until the hardware has been removed.