Outcome analysis of ilizarov and monorail fixators in the treatment of nonunion of long bones: A systematic review and proportion meta-analysis.

Introduction:Nonunion of long bones is a major complication following fractures that requires a substantial amount of investment both monetary and time from patients and surgeons. The need to comprehensively understand the complications, outcomes and distraction capability is profound, which necessitates a review of current evidence on special fixators used for distraction. The current systematic review aims to study the available literature on distraction osteogenesis using special fixators (Ilizarov and Limb Reconstruction System) in the management of nonunion (infected and non-infected). Methods:Cochrane Library, PubMed, Scopus were searched until January 2022. The review included all original studies which used Ilizarov or Monorail Fixators/LRS in the treatment of nonunion of long bones. The quality of studies was assessed using the Modified Coleman Methodology Score. Results:A total of 35 original studies with Ilizarov (n = 29) and LRS (n = 8) were selected including two comparative studies. The pooled data meta-analysis and the subgroup analysis of these studies found both Ilizarov and LRS fixator yield similar functional outcomes for the treatment of long bones nonunion. Conclusion:The review was conducted to understand the scenario of nonunion in long bones. Pin tract infection is found to be the most common complication followed by adjacent joint stiffness and deformity. In our review we observed that both external fixator time and index were lower in LRS compared to Ilizarov group. Further RCT are required comparing Ilizarov and LRS fixators to effectively comment upon the superiority of the implants.