Document Detail

Factors associated with orthodontic stability: a retrospective study of 209 patients.
MedLine Citation:
PMID:  20209179     Owner:  NLM     Status:  In-Data-Review    
Aim: To assess the long-term stability of orthodontic treatment and some factors associated to posttreatment changes. Methods: Six hundred twenty-seven dental casts of 209 patients were examined with the PAR Index at pretreatment (T1), end of treatment (T2), and at long-term follow-up (T3, mean 8.5 years posttreatment). Friedman test and multiple regression analysis at P < .05 were used to evaluate changes among the time points and factors associated with stability. Results: After orthodontic treatment, the PAR Index improved by 94.2%. No significant change was observed between T2 and T3 (P > .05). However, when the sample was divided into a well- (PAR Index =/< 3) and a less well-finished (PAR Index > 3) group, it was observed that well-finished patients experienced some deterioration (P < .001), whereas the less well-finished ones showed some improvement (P < .05). Even with the deterioration, the well-finished patients still had a better PAR Index at T3 compared to the less well-finished ones. Regression analysis showed that PAR Index at T1 and T2, age at T1, and length of retainer wear had a slight association with occlusal stability (R2 = 0.27). No significant association was observed between stability and length of treatment, length of follow-up, sex, extraction, or third molar status on the other side. Conclusion: Orthodontic treatment is quite stable. Not so well-finished treatments tend to show some improvement and well-finished ones deteriorate some. Well-finished patients still have better occlusal characteristics. Retention contributes to maintenance of the final orthodontic results. World J Orthod 2010;11:61-66.
Nair Galvao Maia; Antonio David Correa Normando; Francisco Ajalmar Maia; Maria Angela Fernandes Ferreira; Maria Socorro Costa Feitosa Alves
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  World journal of orthodontics     Volume:  11     ISSN:  1941-6741     ISO Abbreviation:  World J Orthod     Publication Date:  2010  
Date Detail:
Created Date:  2010-03-08     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100959981     Medline TA:  World J Orthod     Country:  United States    
Other Details:
Languages:  eng     Pagination:  61-6     Citation Subset:  D; IM    
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