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Skull base cephalometric changes in cranial expansion by springs.
MedLine Citation:
PMID:  21778845     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
BACKGROUND: : The use of springs in cranial expansion has demonstrated to be effective for craniosynostosis treatment. The spring-exerted expansile action has been observed when springs are placed both in the sagittal and parasagittal regions, mainly in scaphocephaly. In this study, a variation in cephalometric measurements under expansible spring action on the skull base was analyzed.
METHODS: : Thirteen 4-week-old New Zealand white rabbits were divided into 4 groups: group 1, in which only amalgam markers were used (control); group 2, in which amalgam markers were used, and a sagittal suturectomy was performed; group 3, in which amalgam markers were used, and a sagittal suturectomy was performed with placement of expansible springs in the interparietal region; and group 4, in which markers were used, and a linear parasagittal craniectomy was performed with spring placement. All animals were killed at weeks 2, 4, 8, and 12. Radiologic control with cephalometric study was performed.
RESULTS: : Distraction of amalgam markers in the groups with springs was greater than in those without springs. A proportional change in the angles measured through craniometry was observed in these groups.
CONCLUSIONS: : The experimental rabbit model was shown to be adequate to the analysis proposed by the study. Under the action of springs, the groups with sagittal and parasagittal osteotomy were found to present a similar distraction of amalgam markers. A concomitant change in cephalometric measurements occurred, suggesting a change in the skull base mediated by expansible springs placed both in the sutural and nonsutural sites.
Authors:
Rodrigo de Faria Valle Dornelles; Vera Lúcia Nocchi Cardim; Ana Carolina Brandão de Campos Fonseca Pinto; Nivaldo Alonso
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of craniofacial surgery     Volume:  22     ISSN:  1536-3732     ISO Abbreviation:  J Craniofac Surg     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-07-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9010410     Medline TA:  J Craniofac Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1496-501     Citation Subset:  D    
Affiliation:
From *Plastic Surgery, São Paulo University Medical School; †General Surgery, Hospital Beneficencia Portuguesa; ‡Surgery Division, São Paulo University Veterinary School; and §Plastic Surgery Division, São Paulo University Medical School, São Paulo, Brazil.
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