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17. [Summary of the principle characteristics of facial growth. (Introduction to the study of strong anterior-posterior extraoral forces; orthopedic or anterior-posterior headgear, with occipital-cervical support and Mollin's method)]. Delaire J. Ortodoncia; 1981 May; 45(89):18-53. PubMed ID: 6949127 [No Abstract] [Full Text] [Related]
18. Retraction of canines with axial control using extra-oral traction. Davis HD, Usiskin LA. Br J Orthod; 1981 Jan; 8(1):23-30. PubMed ID: 6944102 [Abstract] [Full Text] [Related]