Document Detail

Long-term maxillary changes in patients with skeletal Class II malocclusion treated with slow and rapid palatal expansion.
MedLine Citation:
PMID:  18774084     Owner:  NLM     Status:  MEDLINE    
INTRODUCTION: In this study, we evaluated the long-term maxillary changes in skeletal Class II patients who had slow and rapid palatal expansion. METHODS: The sample consisted of 70 patients divided in 2 groups: 1 group was treated with cervical headgear with expanded inner bow (CHG) and the other with a Haas-type rapid palatal expansion appliance with cervical headgear (RPE-CHG). Data were collected in the molar and canine regions for basal width, alveolar width, and palatal depth at pretreatment (T1), posttreatment (T2), and postretention (T3). The Student paired t test was used to compare data and independent averages between phases. RESULTS: In both groups, from T1 to T2, there were significant increases in basal width, alveolar width, and palatal depth for the molar region; in the canine region, there was a significant increase only in the alveolar width. From T2 to T3, no significant changes were found for basal and alveolar widths in both groups and regions, but a significant increase was seen in palatal depth in the molar region in the RPE-CHG group. CONCLUSIONS: Slow and rapid palatal expansion can expand the maxillae and the maxillary teeth in skeletal Class II patients. Rapid palatal expansion was efficient in the treatment of skeletal Class II patients with severe transverse maxillary discrepancy. Skeletal Class II correction with slow and rapid palatal expansion produced long-term stability (10 years after orthodontic treatment).
Roberto M A Lima Filho; Antonio Carlos de Oliveira Ruellas
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; Journal Article    
Journal Detail:
Title:  American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics     Volume:  134     ISSN:  1097-6752     ISO Abbreviation:  Am J Orthod Dentofacial Orthop     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-09-08     Completed Date:  2008-09-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8610224     Medline TA:  Am J Orthod Dentofacial Orthop     Country:  United States    
Other Details:
Languages:  eng     Pagination:  383-8     Citation Subset:  D; IM    
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MeSH Terms
Dental Arch / anatomy & histology
Extraoral Traction Appliances
Longitudinal Studies
Malocclusion, Angle Class II / therapy*
Maxilla / anatomy & histology*
Orthodontic Appliances
Palatal Expansion Technique* / instrumentation
Time Factors
Treatment Outcome

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

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