Effects of nanoª²TiO2 ceramic orthodontic brackets on dental plaque in vivo

    GUO Li, DING Yin, SHU Lei, FU Shanª²Min

    Department of Orthodontics, Stomatological College, Fourth Military Medical University, Xi¬ðan 710033, China

    ¡¾Abstract¡¿ AIM: To access bacterial plaque clearance of 2 SWA brackets, which are nanoª²TiO2 ceramic brackets developed by us and general brackets manufactured by the Xinya factory, Hangzhou. METHODS: Twenty patients who underwent the extraction of 4 first premolars, got the nanoª²TiO2 ceramic orthodontic bracket or normal stainless steel orthodontic bracket placed on the empty alveoli. Before bracket placement and 1£¬2£¬3 and 4 weeks after bracket placement, Plaque Index for Orthodontic Teeth (PLIª²O) was detected. RESULTS: PLIª²O increased after bracket placement in both the nanoª²TiO2 ceramic orthodontic bracket group and the normal stainless steel orthodontic bracket group. From 1st to 4th week, with time going on, PLIª²O increased in both bracket groups. Difference of PLIª²O between the 2 experimental bracket groups primarily existed in the bracket surface region and the region around brackets, especially in the bracket surface region (P<0.05). CONCLUSION: Applying of fixed appliances will result in oral hygiene difficulty and increasing PLIª²O. And the nanoª²TiO2 ceramic orthodontic bracª²kets present good surface property, therefore, bacterial plaque clearance of it was better than that of the normal stainless steel orthodontic bracket. ......