7Kilicoglu H.Comparison of the effectiveness of two types of toothbrushes on the oral hygiene of patients undergoing orthodontic treatment with fixed appliances[J].Am J orthod Dent facial Orthop.1997,111(6):1-4.
8Lees A,Rock W P.A Comparison Between Written,Verbal,and videotape Oral Hygiene Instruction for Patients with Fixed Appliances[J].Journal of Orthodontics,2000,27(4):323-327.
9Davis T M,Shaw W C,Worthington H V,et al.The effect of orthodontic treatment on plaque and gingivitis[J].Am J Orthod Dentofacial Orthop,1991,99(2):155-161.
10Davies TM, Shaw WC, Worthington HV, et al, The effect of orthodontic treatment on plaque and gingivitis[J]. Am J Orthod Dentofac Orthop, 1991,99:155.