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2 "Treatment effect of combined maxillary protraction and chincap appliance in severe skeletal Class III cases" 304-12, amjorthoddentofacialorthop1987
3 Merwin D, "Timing for effective application of anteriorly directed orthopedic force to the maxilla" 112 : 292-299, 1997
4 Hashim HA, "The reproducibility of Johnston's cephalometric superimposition method" 227-31,
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6 "The prevalence of malocclusion in Swedish schoolchildren" 12-21,
7 "The effects of a modified protraction headgear on maxilla" 117 : 27-38, 2000
8 Houston WJ, "The analysis of errors in orthodontic measurements" 382-90, amjorthod1983
9 Keeling SD, "Systematic and random errors associated with Johnston's cephalometic analysis" 101-7, brjorthod1993
10 "Soft tissue and dentoskeletal profile changes associated with maxillary expansion and protraction headgear treatment" 109 : 38-49, 1996
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29 "Biomechanical effect of anterior directed extraoral forces on the craniofacial complex" amjorthoddentofacialorthop1989200-7
30 "Biomechanical and clinical considerations of a modified protraction headgear" 125-39, amjorthod1980
31 "An orthopedic approach to the treatment of Class III malocclusion in young patients" 598-608, jclinorthod1987
32 Damon WM, "An investigation of maxillary superimposition techniques using metallic implants" 161-8, amjorthoddentofacialorthop1994
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37 Johnston LE Jr, "A comparative analysis of Class II treatments Science and clinical judgment in orthodontics Center for Human Growth and Development University of Michigan" Craniofacial Growth Series 103-48, 1986