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In page Surgical treatment of ingrown toenails:

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In difficult or recurrent cases of onychocryptosis (ingrown toenail) the patient's symptoms persist necessitating a permanent operative solution. The "avulsion procedure" is simple but the surgeon must be skilled enough to accomplish total destruction, and removal of, the nail matrix. Another disadvantage is the long healing and recovery time(> 2 months). In these cases, the best method is the Syme procedure, that means total nail matrix removal + skin flap transfer + phalanx partial osteotomy + stitching.[citation needed]