3Cacciafesta V, Sfondrini MF, Ricciardi A et al. Evaluation of friction of stainless steel and esthetic self - ligating brackets in various bracket - archwire combinations. Am J Orthod Dentofacial Orthop.2003 ,124(4) :395
4Rose CM, Zemik JH. Reduced resistance to sliding in ceramic brakers. J Clin Orthod . 1996 , 30 : 78
5Theodorakopoulou LP, Sadowsky PL, Jacobson Aet al. Evaluation of the debonding characteristics of 2 ceramic brackets: an in vitro study. Am J Orthod Dentofacial Orthop. 2004 ,125(3) :329
6历松．不同托槽与弓丝之间动态摩擦力的研究．成都：华西医科大学，2001
7林珠，段银钟，丁寅，主编．口腔正畸治疗学．第1版.西安：世界图书出版公司，2000：550
8Dorminey JC, Dunn WJ, Taloumis LJ. Shear bond strength of orthodontic brackets bonded with a modified 1-step etchant-and-primer technique. Am J Orthed Dentofacial Orthop, 2003; 124(4) :410
9Summers A, Kao E, Gilmore J, et al. Comparison of bond strength between a conventional resin adhesive and a resin - modified glass ionomer adhesive: an in vitro and in vivo study. Am J Orthod Dentofacial Orthop. 2004 , 126(2) :200
10Olsen ME , Bishara SE , Boyer DB , et al . Effect of varying etching times on the bond strength of ceramic brackets. Am J Orthod Dentofac Orthop , 1996 ,109:403
