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Abstract Objective To investigate the clinical efficacy of six-axis external fixator based on CT data and internal fixation in the correction of tibial deformity.Methods The clinical data of 60 patients who underwent tibial deformity correction from January 2019 to January 2023 were retrospectively analyzed.According to the choice of operation，they were divided into internal fixation group(30 cases) and external fixation group(30 cases).There were 9 males and 21 females in the internal fixation group，with an average age of (32.83±7.73) years old.There were 15 males and 15 females in the external fixation group，with an average age of (31.17±8.43) years old.The surgical conditions，osteotomy healing time，postoperative complications and postoperative follow-up imaging measurement indicators were compared between the two groups.Results All patients were followed up for 6~15 months，with an average of (6.97±1.69) months.Compared with the internal fixation group，the incision length of the external fixation group was shorter (P＜0.05)，and the healing time of the osteotomy was longer (P＜0.05).There was no significant difference between the two groups in operation time，blood loss，ambulation time，hospitalization time and complications (P＞0.05).There was no significant difference in mechanical axis deviation(MAD)，femoro tibial angle(FTA)，medial proximal tibial angle(MPTA)，lateral distal tibial angle(LDTA)，lateral distal femoral angle(LDFA)，joint line convergence angle(JLCA)，and leg length discrepancy(LLD) between the two groups before operation(P＞0.05).There was no significant difference in FTA，MPTA，LDTA，LDFA and JLCA between the two groups after operation (P＞0.05).The MAD and LLD of the external fixation group were smaller than those of the internal fixation group，and the difference was statistically significant (P＜0.05).Comparison with preoperative，there were statistically significant differences in MAD，FTA，MPTA，LDTA and JLCA after operation in the internal fixation group (P＜0.05)，and there were statistically significant differences in MAD，FTA，MPTA，LDTA，JLCA and LLD after operation in the external fixation group (P＜0.05).Conclusion External fixator and internal fixation have the same clinical efficacy in the correction of tibial deformity，but external fixator has the advantages of small incision，small trauma，high accuracy and multiple adjustment after operation.It is especially suitable for patients with LLD and is worthy of clinical application.
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Corresponding Authors:
Qiao Feng
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