The objective of this study was to evaluate the clinical and functional outcomes of intra-articular distal tibial fractures after intramedullary nail (IMN) and independent fixation compared with extra-articular fracture controls.
Methods: A retrospective chart review of distal tibial fractures treated with IMN was performed. Clinical outcomes were compared between fractures with and without intra-articular involvement. Outcomes included nonunion, malunion, ankle arthrosis, and infection. Patient-Reported Outcome Measurement System (PROMIS) scores were used to assess subjective outcomes.
Results: Of the 135 distal tibial fractures, 87 extra-articular and 48 intra-articular, no significant difference was observed in the rate of ankle arthrosis between intra-articular and extra-articular fractures (2% versus 0%; P = 0.35). Similarly, no difference was observed in the postoperative rates of infection (8% versus 3%; P = 0.25), the rate of nonunion (17% versus 10%; P = 0.29), or the rate of malunion (10% versus 21%; P = 0.17). No notable difference was observed in PROMIS scores between groups.
Conclusion: This study suggests that IMN is an acceptable method of fixation in select intra-articular distal tibial fractures. In the intra-articular group, low rates of ankle arthrosis were noted at intermediate follow-up, with no increase in nonunion, malunion, or infection compared with extra-articular fractures. Furthermore, PROMIS scores indicate similar functional outcomes in patients, regardless of intra-articular involvement.
Copyright © 2020 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Orthopaedic Surgeons.