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Master's Dissertation
DOI
10.11606/D.25.2009.tde-15042009-102736
Document
Author
Full name
Juliana Fernandes de Morais
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Bauru, 2009
Supervisor
Committee
Freitas, Marcos Roberto de (President)
Cuoghi, Osmar Aparecido
Pinzan, Arnaldo
Title in Portuguese
Estabilidade do fechamento dos diastemas interincisivos superiores, tratados na fase de dentadura permanente
Keywords in Portuguese
diastema
estabilidade
ortodontia
paralelismo radicular
recidiva
Abstract in Portuguese
O objetivo deste estudo foi avaliar a estabilidade do fechamento dos diastemas interincisivos superiores, verificando sua correlacao com a largura inicial desses espacos, a sobressaliencia, a sobremordida e o paralelismo de raizes. A amostra foi composta por 30 pacientes com pelo menos um diastema, com largura minima de 0,77mm e media do somatorio dos tres diastemas interincisivos de 2,64mm (DP = 1,46; minimo= 0,77; maximo= 8,04). Todos os pacientes apresentavam os caninos superiores permanentes com, no minimo, a metade da coroa intrabucal. As mensuracoes foram realizadas em modelos de estudo (largura dos diastemas, sobressaliencia e sobremordida) e radiografias panorâmicas (paralelismo de raizes), obtidos nos estagios pre-tratamento, final de tratamento e, pelo menos, 2,4 anos pos-tratamento. Os resultados da analise de variancia para medidas repetidas demonstraram que a recidiva do diastema mediano foi significante (media= 0,45mm, DP= 0,66), mas foi estatisticamente menor do que sua largura inicial, e os diastemas entre os incisivos centrais e laterais permaneceram fechados, na maioria dos casos. Ocorreu recidiva do diastema mediano em 18 pacientes (60% da amostra) e 19 pacientes apresentaram reabertura de pelo menos um dos diastemas interincisivos. De acordo com a analise de regressao multipla, os unicos fatores associados a recidiva do diastema mediano foram a largura pretratamento deste espaco (p=0,000) e a alteracao da sobressaliencia durante o periodo pos-tratamento (p=0,046). Nao foi encontrada associacao entre o paralelismo de raizes e a recidiva dos diastemas interincisivos.
Title in English
Postretention stability after orthodontic closure of anterior maxillary diastemas
Keywords in English
diastema
orthodontics
relapse
root parallelism
stability
Abstract in English
This study evaluated the stability of maxillary anterior diastemas closure and its association with relapse and dental casts variables (interincisor width, overjet and overbite) and also with root parallelism. Sample comprised 30 patients with at least one pretreatment anterior diastema of 0.77mm or greater after eruption of maxillary permanent canines. Data were obtained from dental casts and panoramic radiographs taken pretreatment, posttreatment and at least 2 years postretention. The sum of initial mean width of the diastemas was 2.64mm (SD=1.46, minimum=0.77). Repeated measures analysis of variance demonstrated significant relapse of median diastema (mean=0.45mm, SD=0.66) but this value was statistically slighter than its initial width, and closure of diastemas located between central incisors and lateral incisors showed great stability. Relapse of median diastema occurred in 18 cases, and 19 patients showed at least one space recurrence. Only initial diastema severity width and relapse of overjet showed association with the relapse of median diastema. There was no association between interincisor diastemas relapse and root parallelism.
 
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Publishing Date
2009-04-16
 
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