title: Management of segmental skeletal defects by the induced membrane technique.
abstract: BACKGROUND
  Surgical reconstruction of segmental skeletal defects represents a true challenge for the orthopedic surgeons. Recently, Masquelet et al. described a two-stage technique for reconstruction of bone defects, known as the induced membrane technique. The aim of this study is to assess the results of the induced membrane technique in the management of segmental skeletal defects resulting from debridement of bone infection.
  
  
  METHODS
  Seventeen patients with segmental skeletal defects were treated in our institution by the induced membrane technique. The average age of the patients was 43 years (range 26- 58 years). The causes of the defects were infected gap nonunion in 12 cases and debridement of osteomyelitis in 5 cases. The defects were located in the tibia (n = 13) and the femur (n = 4). The mean defect was 7 cm (range 4 cm - 11 cm). All cases were treated by the induced membrane technique in two-stages.
  
  
  RESULTS
  Bone union happened in 14 patients. The limb length discrepancy did not exceed 2.5 cm in the healed cases. The mean time of healing was 10 months (range 6-19 months). The complications included nonunion of the graft in five cases, failure of graft maturation in two cases, reactivation of infection in two cases and refracture after removal of the frame in one case. These complications were managed during the course of treatment and they did not affect the final outcome in all patients except three.
  
  
  CONCLUSIONS
  The induced membrane technique is a valid option for the management of segmental skeletal defects. It is a simple and straight forward procedure, but the time required for growth and maturation of the graft is relatively long.
authors.affiliation: Department of Orthopedic Surgery, Mansoura University, Egypt.
authors.forename: Barakat Sayed
authors.initials: BS
authors.lastname: El-Alfy
authors.affiliation: Department of Orthopedic Surgery, Mansoura University, Egypt.
authors.forename: Ayman M
authors.initials: AM
authors.lastname: Ali
keywords: Bone defects; Bone diseases; bone cements; bone infection; induced membrane technique; infections; membranes