Objective To compare the application effects of segmental rectangular archwire technique and dental arch splint fixation in the replantation of traumatic dislocation teeth. Methods A total of 80 patients who received replantation of traumatic dislocation teeth in our hospital from January 2023 to December 2024 were selected, and they were divided into the control group and the observation group by the random number table method, with 40 patients in each group. The control group was treated with dental arch splint fixation, and the observation group was treated with segmental rectangular archwire technique. The clinical efficacy, periodontal health status and satisfaction were compared between the two groups. Results The total effective rate of treatment in the observation group was 97.50%, which was higher than 85.00% in the control group (P <0.05). The scores of GI and SBI in the observation group at 1 month after treatment were lower than those in the control group (P <0.05). There was no statistically significant difference in the scores of SBI and GI between the two groups at 6 months after treatment (P >0.05). The satisfaction scores of aesthetics, comfort and fixation quality in the observation group after treatment were higher than those in the control group (P <0.05). Conclusion The segmental rectangular archwire technique has higher clinical application value in the replantation of traumatic dislocation teeth. It can effectively improve the treatment effect and periodontal health status, and enhance patients' fixation comfort and satisfaction.