The successful repair of two oblique metacarpal shaft fractures with interosseous nylon sutures is reported. The technique was devised for the treatment of a 54-year-old woman with severe asthma and metal allergies that precluded the use of more conventional methods. Allergic reactions to mental implants and alternative stabilization techniques are discussed. The method is suggested not as a routine procedure, but rather as an option to standard means of fracture fixation in similar unusual circumstances.