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Emerging techniques put a new twist on ankle repair
July 01, 2009Rosemont, Ill. - People with ankle injuries who do not respond successfully to initial treatment may have a second chance at recovery, thanks to two new procedures developed to restore the injured area, according to a study published in the July 2009 issue of the Journal of the American Academy of Orthopaedic Surgeons (JAAOS).
The study reviews emerging techniques that have proven successful in treating injuries to the talus, the small bone, which is located between the heel bone and the lower bones of the leg. The talus helps form the ankle joint.
Although most injuries to the talus can be successfully treated using traditional "first-line" therapies involving removal of dead tissue (called "debridement") and drilling, about one-fifth to one-quarter of people with ankle injuries need additional "second-line" restorative treatment to heal successfully, said lead author Matthew Mitchell, MD, an orthopaedic surgeon in private practice in Casper, Wyoming.
The two new techniques rely on cells grown in a lab, and eliminate the need for ostetomy (cutting the bone of the tibia) in some cases, he said.
* Autologous chondorcyte implantation, or ACI, involves removing cartilage cells from the knee or the ankle and growing them in a lab. Once grown, the cartilage is transplanted to the talus. ACI usually involves an ostetomy in order to implant the cells.
* In matrix-induced autologous chondrocyte implantation, or MACI, cells are grown on a special backing material, or "matrix," and then transplanted to the talus. In the authors' experience, an osteotomy is not necessary to implant the cells.
Of these two techniques, the newer MACI technique may offer the most benefits to the patient, according to Dr. Mitchell.
"Both ACI and MACI show a lot of promise, but I think the advantage of MACI is that an osteotomy is not necessary in order to successfully implant the matrix," he said. "You only need to make an incision to place the graft, which decreases the morbidity of the procedure quite a bit."
"In my experience so far with this emerging technique in Australia, the results have been as good as, or better than, other restorative techniques," he added. MACI is currently considered investigational by the FDA in the United States.
Traditional restorative techniques involve removing a cartilage donor plug from the knee and implanting it over the ankle injury, or "lesion." This requires an operation on the knee and cutting the bone (osteotomy) of the tibia to accomodate the graft.
As a result, these traditional techniques involve potential problems, including:
* pain in the donor knee
* tissue damage in the donor knee
* tissue damage in the ankle as a result of osteotomy
"In most individuals, results are favorable with reparative techniques, such as debridement and drilling," said Dr. Mitchell. "The lesions that are problematic and which don't respond well to reparative treatments are lesions that are larger, and those which are fairly deep, as well as lesions which have a cyst-like structure. Whether or not an ankle "lesion" requires additional treatment after an initial reparative procedure often depends upon several factors, including: size, depth and structure of the legion.
"Once you've performed a reparative technique and the patient still doesn't heal properly, then we would move on to a second-line restorative treatment," he said
American Academy of Orthopaedic Surgeons
The two new techniques rely on cells grown in a lab, and eliminate the need for ostetomy (cutting the bone of the tibia) in some cases, he said.
* Autologous chondorcyte implantation, or ACI, involves removing cartilage cells from the knee or the ankle and growing them in a lab. Once grown, the cartilage is transplanted to the talus. ACI usually involves an ostetomy in order to implant the cells.
* In matrix-induced autologous chondrocyte implantation, or MACI, cells are grown on a special backing material, or "matrix," and then transplanted to the talus. In the authors' experience, an osteotomy is not necessary to implant the cells.
Of these two techniques, the newer MACI technique may offer the most benefits to the patient, according to Dr. Mitchell.
"Both ACI and MACI show a lot of promise, but I think the advantage of MACI is that an osteotomy is not necessary in order to successfully implant the matrix," he said. "You only need to make an incision to place the graft, which decreases the morbidity of the procedure quite a bit."
"In my experience so far with this emerging technique in Australia, the results have been as good as, or better than, other restorative techniques," he added. MACI is currently considered investigational by the FDA in the United States.
Traditional restorative techniques involve removing a cartilage donor plug from the knee and implanting it over the ankle injury, or "lesion." This requires an operation on the knee and cutting the bone (osteotomy) of the tibia to accomodate the graft.
As a result, these traditional techniques involve potential problems, including:
* pain in the donor knee
* tissue damage in the donor knee
* tissue damage in the ankle as a result of osteotomy
"In most individuals, results are favorable with reparative techniques, such as debridement and drilling," said Dr. Mitchell. "The lesions that are problematic and which don't respond well to reparative treatments are lesions that are larger, and those which are fairly deep, as well as lesions which have a cyst-like structure. Whether or not an ankle "lesion" requires additional treatment after an initial reparative procedure often depends upon several factors, including: size, depth and structure of the legion.
"Once you've performed a reparative technique and the patient still doesn't heal properly, then we would move on to a second-line restorative treatment," he said
American Academy of Orthopaedic Surgeons
Chronic ankle pain may be more than just a sprain
Ankle sprains are a common injury after a fall, sudden twist or blow to the ankle joint. Approximately 40 percent of those who suffer an ankle sprain will experience chronic ankle pain, even after being treated for their initial injury.
UF researchers warn parents about dangers of childhood foot burns
Warmer weather is just around the corner, but before families fire up the barbecue, roast marshmallows around a crackling campfire or burn yard debris, they should consider some common precautions to help snuff out a serious childhood health risk.
Textured insoles could prevent common sporting ankle and foot injuries
Textured insoles in boots and sports shoes could prevent the all too common foot and ankle injuries that plague sport, suggests research in the British Journal of Sports Medicine. Conventional boots and sports shoes, with a smooth insole, mask vital sensory cues to the extremely sensitive soles of the feet. These relay information about pressure differences in the areas underneath the feet, known as the "dynamometric map." The common inclusion of air cushions or gel cells in boots and trainers to absorb shock only serves to make matters worse, say the authors. The researchers designed textured rubber insoles to fit the boots of 17 players from the Australian Women's soccer team. An
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