Medical Journal of the Islamic Republic Of Iran

en The Impact of Delayed Osteosynthesis of Bone Healing in Patients with Extra-articular Distal Femoral Fracture Orthopedic Surgery Orthopedic Surgery Original Research: Clinical Science Original Research: Clinical Science Background: In extra-articular distal femoral fractures (EDFFs), nonunion is a serious complication that occurs rarely. In this study, we examined how longer preservation of initial fracture hematoma by delaying the osteosynthesis (OS) affects the fracture union.    Methods: In a retrospective cohort study, 98 EDFF patients were included. The OS was done within 2 days of injury in 50 patients (early OS group) and after 2 days of injury in 48 patients (late OS group). Time to callus formation and fracture union, bleeding amount, surgical duration, pain, knee range of motion, knee function, and postoperative complications, including the nonunion, knee deformity, infection, and revision, were compared between the 2 groups. Statistical analyses were done with SPSS. A comparison of the mean between the 2 groups was made with an independent t test or its nonparametric counterpart. A comparison of categorical variables between the 2 groups was made using a chi-square or the Fisher's exact test. P ˂ 0.05 was considered statistically significant.    Results: The mean time to callus formation was 47.1 ± 17.3 days in the early OS group and 46.9 &lrm;&lrm;± 19.7 in the late OS group (P = 0.950). The mean time to fracture union was &lrm;&lrm;114.9 ± 21 in the early OS group and 117.4 ± 28.8 days &lrm;in the late OS group (P = 0.630). The mean operation time and bleeding amount between the 2 groups did not differ significantly (P = 0.230 and P = 0.340, respectively). The knee range of motion, pain, and function were not notably different (P = 0.620, P = 0.790, and P = 0.770, respectively). Nonunion occurred in 3 patients of early OS and 2 patients of the late OS group. Other complications were also comparable in the 2 study groups.    Conclusion: Delayed OA in EDFF patients has no significant effect on bone healing and fracture union. Future standard studies are required to confirm these results.   Distal Femur Fractures, Osteosynthesis, Hematoma, Fracture Nonunion, Fracture Healing 164 167 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-7348-4&slc_lang=en&sid=1 Hamed Tayyebi hamedtayebi65@gmail.com 200319475328460088864 200319475328460088864 No Shohadaye Haftom-e-Tir Hospital, School of Medicine, Iran University of Medical Sciences, Tehran, Iran Sajad Noorigaravand sajadnoori85@yahoo.com 200319475328460088865 200319475328460088865 No Shohadaye Haftom-e-Tir Hospital, School of Medicine, Iran University of Medical Sciences, Tehran, Iran Mohammad Reza Baheaddini Mrbahaeddini@yahoo.com 200319475328460088866 200319475328460088866 No Bone and Joint Reconstruction Research Center, Department of Orthopedics, School of ‎Medicine, Iran University of Medical Sciences, Tehran, Iran Elham Mohammadyahya elhammohammadyahya@gmail.com 200319475328460088867 200319475328460088867 No Bone and Joint Reconstruction Research Center, Department of Orthopedics, School of ‎Medicine, Iran University of Medical Sciences, Tehran, Iran Ava Parvandi ava.parvandi@gmail.com 200319475328460088868 200319475328460088868 No Joint and Related Tissue Research Center, Akhtar Orthopedic Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran Saeid Shirvani saeidshirvani1990@gmail.com 200319475328460088869 200319475328460088869 No Shohadaye Haftom-e-Tir Hospital, School of Medicine, Iran University of Medical Sciences, Tehran, Iran Ali Yeganeh Yeganeh.a@iums.ac.ir 200319475328460088870 200319475328460088870 Yes Bone and Joint Reconstruction Research Center, Department of Orthopedics, School of ‎Medicine, Iran University of Medical Sciences, Tehran, Iran