Abstract: Objective　To investigate the effect of personalized nasal stent in the correction of secondary nasal deformities after unilateral cleft lip surgery. Methods　Forty patients with secondary nasal deformities after unilateral cleft lip surgery from September 2020 to September 2021 were randomly divided into study group and control group, with 20 patients in each group. After surgery, a personalized nasal stent and a finished nasal stent were used respectively. The width and height of the healthy side and the affected side were measured 6 months and 1 week after operation, and the changes of the healthy side and the affected side were compared between the two groups 6 months after operation. Results　Six months after surgery, the height and width changes of the affected side of the nostril in the study group were smaller than those in the control group, with statistical significance (P<0.05). Six months after surgery, there was no significant difference in height and width changes of the healthy side nostril between the two groups (P>0.05). The postoperative effect score of the study group was higher than that of the control group, the difference was statistically significant (P<0.05). Conclusion　Personalized nasal stent has significant effects on the support of nostrils, the improvement of the nasal columella deviation, the nasal tip shape and the nasal base after nasal deformity reconstruction, which is worthy of clinical application.

Key words: 3D printing, 　Personality nasal stent, 　Cleft lip and palate, 　Nasal deformity