Abstract: Objective To compare the outcomes and complications of open versus closed reduction and internal fixation for Delbet type Ⅱ and Ⅲ hip fractures in children and adolescents. Methods We retrospectively analyzed the data of 42 patients with Delbet type Ⅱ (22 cases) and Ⅲ (20 cases) hip fractures (including 24 male and 18 female patients with a mean age of 8.19±3.23 years, range 2-15 years) admitted in the Fifth and Third Affiliated Hospital of Southern Medical University from January, 2013 to January, 2022. Nineteen of the patients received closed and 23 underwent open reduction and internal fixation. The operation time, postoperative healing time, and Ratliff standard hip function results were compared between the two groups, and the incidences of such complications as premature epiphyseal closure and femoral head necrosis were analyzed. Results All the patients were followed up for 13-84 months (mean 36.04 ± 8.23 months). The operation time of closed reduction and internal fixation was significantly shorter than that of open surgery (68.23±24.68 vs 119.71±32.75 min, P<0.05). All the patients showed good fracture healing after the operations with similar healing time between the two groups (3.32±0.31 vs 3.18±0.20 months, P>0.05). The rate of excellent and good hip joint function was 90.48% in the overall patients and showed no significant difference between the two groups (17/19 vs 21/23, P>0.05). The incidences of premature epiphyseal closure (3/19 in closed vs 4/23 in open reduction group, P>0.05) and femoral head necrosis (2/19 vs 1/23, P>0.05) were comparable between the two groups. Conclusions In children and adolescents, open reduction can achieve definite surgical effect for Delbet type II and III hip fractures, but closed reduction and internal fixation are recommended when anatomic reduction can be achieved. Premature epiphyseal closure and femoral head necrosis are common and serious complications of these fractures.

Key words: Delbet type Ⅱ and Ⅲ; children and adolescents; hip fractures; surgical treatment