BACKGROUND Despite advanced treatment methods, the treatment of pseudoarthrosis still poses a significant challenge for orthopedists. In this study, we aimed to assess the clinical results of decortication and bone grafting and extracorporeal shock wave treatment (ESWT) in long-bone pseudoarthrosis. MATERIAL AND METHODS Between 2007 and 2015, 68 fractures of 66 patients treated for long-bone pseudoarthrosis were evaluated retrospectively. ESWT was used in 36 extremities and decortication and iliac bone grafting was used in 32. The treatment results of these patients were evaluated and compared with rates in the literature. RESULTS The mean patient age was 43.9 years (range, 21-69). The mean interval between the occurrence of the fracture and treatment with bone grafting or ESWT was 8.6 months and the mean interval between the procedure and achievement of union was 6.9 months. The patients were followed up for a mean period of 25.2 months. After the mean follow-up period, bone union had occurred in all 32 patients (100%) in the decortication and bone grafting group and in 28 (78%) of the 36 patients in the ESWT group (P=0.023). CONCLUSIONS This study shows that extracorporeal shock wave treatment should be considered the first option in treatment of pseudoarthrosis as it is a non-invasive method and also provides good rates of union. In patients that do not heal with ESWT, decortication and bone grafting remains the criterion standard therapy.