Document Detail


Factors influencing the predictability of soft tissue profile changes following mandibular setback surgery.
MedLine Citation:
PMID:  11407775     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The objective of this cephalometric study was to assess long-term changes in the soft tissue profile following mandibular setback surgery and investigate the presence of factors that may influence the soft tissue response to skeletal repositioning. The subjects enrolled were 80 consecutive mandibular prognathism patients operated with bilateral sagittal split osteotomy and rigid fixation. Lateral cephalograms were taken at 6 occasions: immediate presurgical, immediate postsurgical, 2 and 6 months postsurgical, and 1 and 3 years postsurgical. The subjects were grouped according to gender and magnitude of setback. Ratios of soft tissue to hard tissue movements were calculated for the subgroups. Females generally demonstrated greater ratios than males with a statistically significant difference for the upper lip and chin (P < .05). Postsurgical alterations in the profiles were more predictable in patients with larger setbacks compared to patients with smaller ones. Skeletal relapse had a profound influence on long-term profile changes. Based on these findings, it is proposed that the database used in prediction software be adjusted to account for such factors in an attempt to improve the accuracy of computerized treatment simulations.
Authors:
K A Mobarak; O Krogstad; L Espeland; T Lyberg
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Angle orthodontist     Volume:  71     ISSN:  0003-3219     ISO Abbreviation:  Angle Orthod     Publication Date:  2001 Jun 
Date Detail:
Created Date:  2001-06-15     Completed Date:  2001-10-18     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0370550     Medline TA:  Angle Orthod     Country:  United States    
Other Details:
Languages:  eng     Pagination:  216-27     Citation Subset:  D; IM    
Affiliation:
Department of Orthodontics, University of Oslo, Norway. kmobarak@bigfoot.com
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MeSH Terms
Descriptor/Qualifier:
Adult
Analysis of Variance
Cephalometry*
Chin / anatomy & histology
Face / anatomy & histology*
Female
Forecasting
Humans
Lip / anatomy & histology
Male
Malocclusion, Angle Class III / surgery*
Mandible / abnormalities,  surgery*
Prognathism / surgery*
Prognosis
Recurrence
Sex Factors
Statistics, Nonparametric

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


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