Document Detail

Craniofacial changes in patients with Class III malocclusion treated with the RAMPA system.
MedLine Citation:
PMID:  20687312     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: The underlying etiology of Class III malocclusion may be associated with cranial base morphology. The aim of this study is to test the efficacy of a Right-Angled Maxillary Protraction Appliance (RAMPA) System in Asian subjects with Class III malocclusions. MATERIALS AND METHODS: 27 homologous landmarks were digitized from lateral cephalographs for 10 pre-pubertal Japanese children (mean age 95 months) with skeletal Class III malocclusion prior to and after RAMPA treatment. The mean, pre- and post-treatment craniofacial configurations were computed using Procrustes superimposition, and subjected to principal components analysis (PCA), and finite-element analysis (FEA). RESULTS: The mean treatment time was 22.5 months. All patients showed significant craniofacial change with correction of anterior and/or posterior crossbite. The mean, pre- and post-treatment craniofacial configurations were statistically different when tested using PCA (p < 0.001), with the first two principal components accounting for 97% of the total shape change. Using FEA, the anterior cranial base showed a relative 12-32% increase in size. The midfacial and mandibular regions, as well as the oropharyngeal airway showed large relative size-changes. CONCLUSION: This study suggests that the anterior cranial base may be targeted in the correction Class III malocclusions.
Yasushi Mitani; Saeed M Banabilh; G Dave Singh
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of orthodontics (Milwaukee, Wis.)     Volume:  21     ISSN:  1539-1450     ISO Abbreviation:  Int J Orthod Milwaukee     Publication Date:  2010  
Date Detail:
Created Date:  2010-08-06     Completed Date:  2010-09-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101147228     Medline TA:  Int J Orthod Milwaukee     Country:  United States    
Other Details:
Languages:  eng     Pagination:  19-25     Citation Subset:  D    
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MeSH Terms
Activator Appliances
Cephalometry / methods*
Child, Preschool
Facial Bones / pathology*
Finite Element Analysis
Follow-Up Studies
Longitudinal Studies
Malocclusion, Angle Class III / therapy*
Orthodontic Appliance Design* / classification
Palatal Expansion Technique / instrumentation*
Photography, Dental
Retrospective Studies
Skull / pathology*
Skull Base / pathology
Stress, Mechanical

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

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