6Veron MH, Couble ML, France L. The biological effects of fluoride on tooth development: Possible use of cell culture systems [R]. Int Dent J, 1992;42(2) :108-112.
7Ferjerskov O, Yanagisawa T, Tohda H, et al. Posteruptive changes in human dental fluorosis- and histological and ultrastructural study [J]. Proc Finn Dent Soc, 1991;87(4):607-619.
8Richards A. Nature and mechanisms of dental fluorosis in animals [J]. J Dent Res, 1990;69 (Spec):701-705.
9Dickinson PT, Power JM. Evaluation of fourteen direct bonding orthodontic bases [J]. Am J Orthod, 1980;78(6):630-639.
10Miller JR, Mancl L, Arbuckle GA. Three- year clinical trial using a glass ionomer cement for the bonding of orthodontic brackets [J]. Angle Orthod, 1996;66(4) :309-312.
7Sharma-Sayal SK, Rossouw PE, Kukami GV, et al. The influence of orthodonic bracket base design on shear bond strength[J].Am J Orthod Dentofacial Orthop,2003, 124(1 ):74-82.
8Bishara SE. Ceramic Brackets: A Ckinical Perspective [J]. World J Orthod, 2003, 4: 61-66.