The Viladot Implant in Flatfooted Children

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Abstract
In 1991, Viladot 1 described an implant for the treatment of painless flatfeet in children. This was inserted through a double approach to allow the talus to function while limiting its ability to slide off the calcaneus. The wineglass shaped prosthesis was inserted into the sinus tarsi with a tibialis posterior advancement and soft tissue correction to allow the foot to adopt a neutral position. This is in keeping with other procedures described for the correction of flatfoot. Viladot reported excellent results in 234 feet operated on in such a manner using clinical, radiological and photopodographic parameters. In Sheffield, over three years, 22 implants were inserted for similar painless flatfeet in children. The results were assessed using clinical, radiological and pedobarographic parameters. Viladot was able to demonstrate an improvement in all cases, clinically, radiologically and photopodographically with little or no discomfort and a return to preoperative levels of activity including sport. We found that in all cases, postoperative pain was a major feature which limited activity in all but 2 feet and which reduced the ability to take part in sport and other preoperative pastimes. Unlike Viladot, we were unable to demonstrate consistent improvements radiologically. Pedobarographically, the loading of the first metatarsal head remained unchanged and the centre of pressure was corrected in only 14%.

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