1Sharpe W, Reed B, Subtelny J D, et al. Orthodontic relapse, apical root resorption, and crestal alveolar bone levels. Am J Orthod Dentofac Orthop, 1987;91:252-258.
2Levander E, Bajka R, Malmgren O. Early radiographic diagnosis of apical root resorption during orthodontic treatment: a study of maxillary incisors.Eur J of Orthod, 1998;20:57-63.
3Kaley J, Phillips C. Factors related to root resorption in edgewise practice. Angle Orthod, 1991 ;61:125-130.
4Lupi JE, Handelman CS, Sadowwsky C. Prevalence and severity of apical root resorption and alveolar bone loss in orthodontically treated adults. Am J Orthod, 1996;109:28-37.
5Linge L, Linge B O. Apical root resorption in upper anterior teeth. Eur Jorthod, 1983; 5:173-183.
6Harry MR, Sims MR. Root resorption in bicuspid intrusion: Ascanning electromicroscopic study. Angle Orthod, 1982;52:235-258.
7DeShields RW. A study of root resorption in treated Class 1 division 1 malocclusions. Angle Orthod, 1969;39:231-245.
8Kennedy DB, Joondeph DR, Little RM. The effect of extraction and orthodontic treatment on dentoalveolar support. Am J Orthod, 1983; 84: 183-190.
9Newnan WG. Possible etiological factors in external root resoption. Am J Orthod, 1975; 67: 522-539.
8Shinya K, Shinya A,Nakahara R,et al. Characteristics of the tooth in the initial movement: the influence of the restraint site to the periodontal ligament and the alveolar bone [ J ]. Open Dent J, 2009,15(3) :85.
9林九祥.现代口腔正畸学[M].3版.北京:整个医学科技出版社,1999:656-661.
10VIirmarashi B,Torbati A,Alaam A,et al.Orthodontieally assisted Vetrical augmentation in the esthetic zone [J].J Prosthodont, 2010, 19(3): 235-239.
