Objective To study the application value and clinical effect of digital positioning combined with 3D printed technology in the treatment of femoral neck fracture with screw internal fixation. Methods Thirty-six patients undergoing internal fixation for femoral neck fracture in our hospital between 2022 and 2023 were randomly divided into a 3D group and a traditional group, with 18 patients in each group. The traditional group used traditional freehand nailing, and the 3D group applied digital positioning combined with 3D printed guide plate for internal fixation surgery. Operation time, intraoperative blood loss, times of K-wire puncture, intraoperative X-ray exposure times, imaging index, and follow-up results were compared between the two groups. Results The intraoperative blood loss, mean surgical operation time, intraoperative X-ray exposure times and times of K-wire puncture in 3D group were lower than those of the traditional group (P<0.001). The imaging evaluation result showed that the screw spacing, angle between screw and femoral neck axis in the 3D group were lower than those of the traditional group. The ratio of screw distribution area and the distance from screw to cervical cortex in in the 3D group was higher than those of the traditional group, and the difference was statistically significant (P<0.05). There were no statistical differences in the length of hospitalization, time of complete weight-bearing activity, complete healing of the fracture, and occurrence of complications, no cases of femoral head necrosis at the last follow-up between the two groups (P>0.05). There were no statistical differences in Harris scores at 1, 3, and 6 months and the last follow-up (P>0.05). Conclusions Digital positioning technology combined with 3D printed percutaneous puncture guide plate in the treatment of femoral neck fracture internal fixation, can significantly improve the surgical accuracy and reduction quality, and reduce the operation time, intraoperative blood loss, fluoroscopy times and number of Kirschner needle puncture.
Key words
Femoral neck fracture; /
3D printing; /
Digital positioning; /
Percutaneous puncture guide plate; /
/
Internal fixation
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