Abstract: Objective: To compare the clinical effects of orthodontic button ligation fixation (A), dental arch splint method (B), straight wire bow fixed orthodontic fragments (C), and multistrand stainless wire resin bonding fixation (D) in injuries of loose anterior tooth fixation. Methods: One hundred and thirty-seven eligible subjects aged from 4 to 14 years were randomly treated by (A) Orthodontic button and 0.25mm metal wire, (B) Metal splint with hook and 0.4mm metal wire, (C) Straight-wire bracket and circular arch wire, and (D) The 0.2mm ligature wire was folded three times and resin bonding method. The healing conditions of traumatized teeth, gingival index, operating time, shedding rate, and comfortable index were measured. All data were statistically analyzed. Results: The effectively fixed patients number of group A and D were significantly higher than those of group B and C (P＜0.05). The gingival index of group A and C were significantly lower than those of group B and D (P＜0.05). The treatment time of group A and B were significantly lower than those of group C and D (P＜0.05). The shedding rate of group A and C were significantly lower than those of group D (P＜0.05). The comfortable index of group A were significantly better than those of group B, C, and D (P＜0.05). Conclusion: Orthodontic button ligation fixation is more effective and comfortable for the treatment of traumatized loosen teeth.

Key words: Tooth injuries, Fixation , Orthodontic button , Dental arch splint, Multistrand stainless wire