Cephalometric evaluation of the stability post rapid maxillary expansion surgically assisted / AVALIAÇÃO CEFALOMÉTRICA DA ESTABILIDADE PÓS-EXPANSÃO RÁPIDA DA MAXILA ASSISTIDA CIRURGICAMENTE

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

This study evaluated the stability of the dental and skeletal changes produced by Rapid Maxillary Expansion Surgically Assisted (RMESA), in transversal and vertical dimensions. The sample selected for this retrospective study comprised 60 posteroanterior cephalograms, of 15 patients, being 6 males and 9 females, with mean age of 23,3 years old. An Hyrax appliance was used and the surgical procedure was caractherized by median sagitall osteotomy and non approach of pterygopalatine suture. The beginning of activation occurred in the third post-operatory day, being that, the limits for the expansion were determined by criteria eminently clinical. All the patients were radiografied in periods preexpansion (T1), immediate post-expansion (T2), three months post-expansion (with the Hyrax appliance as retention) (T3) and six months post-expansion (with the removable acrylic plate as retention) (T4). Linear measurments were obtained from the cephalograms tracings generated by a computerized program (Radiocef Studio 2) and statistically analized by the test of variance (ANOVA) and Tukey at the level of 5% of significance. It was concluded that RMESA produced a statistically significant increase , of nasal cavity, maxillary width , upper intermolars distance, from T1 to T2, and were mantained in T3 and T4. The facial width and the lower intermolars distance did not presented changes after the RMESA. Evaluating the vertical behavior of the face, it was observed an increase of anterior inferior facial heigh in periods T1 to T2 that decreased after retention of three months (T3) and mantained stable in T4, although increased if compared with T1.(AU)

ASSUNTO(S)

cirurgia maxilofacial surgery - oral maxilla - expansion expansão maxilar cephalometrics cefalometria ortodontia

ACESSO AO ARTIGO

Documentos Relacionados