Document Detail

Molar changes with cervical headgear alone or in combination with rapid maxillary expansion.
MedLine Citation:
PMID:  18298206     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To test the hypothesis that there is no difference in the distal movement of the maxillary first permanent molars when cervical headgear is used alone or in combination with rapid maxillary expansion. MATERIALS AND METHODS: The sample was composed of 36 subjects (aged 9 to 13 years), treated in the Faculty of Dentistry, Pontifícia Universidade Cat;aaolica, Rio Grande do Sul, Brazil. The individuals were in good health and in their pubertal growth period. All had Class II division 1 malocclusion. The patients were divided into two groups: group 1 (22 subjects), Class II, with a normal transverse maxilla treated with cervical traction headgear (HG) 400 g 12 h/d, and group 2 (14 subjects), Class II maxillary transverse deficiency treated with rapid maxillary expansion plus cervical traction headgear (RME + HG). An additional group 3 (17 subjects) served as a control group and included individuals with the same characteristics. All subjects had two lateral cephalograms: initial (T1) and progress (T2), taken 6 months later. Differences between T1 and T2 were compared with the Student's t-test, and three groups were compared by the analysis of variance and Tukey multiple comparison test. RESULTS: Results showed greater distal tipping and greater distal movement of the first permanent molars in group 1 (HG) than in group 2 (RME + HG), P < .05. No extrusion of first permanent molar occurred in either group (P > .05). CONCLUSION: The hypothesis was rejected. Cervical traction headgear alone produced greater distal movement effects in maxillary first permanent molars when compared with rapid maxillary expansion associated with cervical headgear.
Marcel Marchiori Farret; Eduardo Martinelli S de Lima; Vanessa Pereira Araújo; Susana Maria Deon Rizzatto; Luciane Macedo de Menezes; Marcio Lima Grossi
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The Angle orthodontist     Volume:  78     ISSN:  0003-3219     ISO Abbreviation:  Angle Orthod     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-02-26     Completed Date:  2008-11-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370550     Medline TA:  Angle Orthod     Country:  United States    
Other Details:
Languages:  eng     Pagination:  847-51     Citation Subset:  D; IM    
Department of Orthodontics, Pontifícia Universidade Cat;aaolica, Rio Grande do Sul, Brazil.
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MeSH Terms
Cephalometry / methods
Extraoral Traction Appliances*
Follow-Up Studies
Image Processing, Computer-Assisted / methods
Malocclusion, Angle Class II / pathology,  therapy*
Maxilla / pathology*
Molar / pathology*
Orthodontic Appliance Design
Palatal Expansion Technique*
Tooth Movement / instrumentation,  methods

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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