TY - BOOK AU - El-azab ,kareem mohamed AU - el-mangoury ,Nagwa helmy AU - elsayed,hend salah TI - Evaluation of the pain preception during canine retraction in first premolars extraction cases at 2,4,6 and 8 weeks re-activation intervals using power chain U1 - 617.6 21 PY - 2019/// KW - dental KW - orthodontics N1 - Supervisors Nagwa helmy el-mangoury ,hend salah elsayed; Thesis (M.Sc.)-Cairo university, faculty of oral and dental medicine, 2019; Includes bibliographical references UR - http://repository.fue.edu.eg/xmlui/handle/123456789/5228 ER -