ObjectiveTo analyze the clinical effect of digital design 3D printing technology combined with anterior minimally invasive surgery in the treatment of avascular necrosis of femoral head. MethodsThe clinical data of 34 patients (42 hips) with avascular necrosis of femoral head were retrospectively analyzed. Among them, 17 patients (21 hips) receiving digital design 3D printing technology combined with anterior minimally invasive surgery were enrolled in the study group, and 17 patients (21 hips) with anterior minimally invasive surgery during the same period, whose general data were comparable with the study group, were enrolled in the control group. The intraoperative blood loss, operation duration, postoperative out-of-bed activity time, Harris hip scores before and after surgery, prosthesis angle and postoperative complications were compared between the two groups. ResultsThe study group yielded a shorter operation duration, less intraoperative blood loss, earlier postoperative out-of-bed activity time as compared to the control group (all P＜0.05). One month after operation, The Harris score of the study group was higher than that of the control group (P＜0.05). There were no statistically significant differences in postoperative abduction and anteversion angle of the acetabulum prosthesis, as well as the incidence of lateral femoral cutaneous nerve injury and prosthesis dislocation between the two groups (all P＞0.05). ConclusionDigital design 3D printing technology combined with anterior minimally invasive surgery for avascular necrosis of femoral head has the advantages in a shorter operation duration, less intraoperative blood loss and a faster postoperative recovery as compared with simply anterior minimally invasive surgery, which is worthy of wide promotion and application.

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