Transverse effects of surgically assisted rapid maxillary expansion: A comparative study using Haas and Hyrax

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dc.contributor.author Hino, Claudia Toyama [UNIFESP]
dc.contributor.author Pereira, Max Domingues [UNIFESP]
dc.contributor.author Sobral, Christiane Steponavicius [UNIFESP]
dc.contributor.author Kreniski, Tessie Maria [UNIFESP]
dc.contributor.author Ferreira, Lydia Masako [UNIFESP]
dc.date.accessioned 2016-01-24T13:51:22Z
dc.date.available 2016-01-24T13:51:22Z
dc.date.issued 2008-05-01
dc.identifier http://dx.doi.org/10.1097/SCS.0b013e31816aaa91
dc.identifier.citation Journal of Craniofacial Surgery. Philadelphia: Lippincott Williams & Wilkins, v. 19, n. 3, p. 718-725, 2008.
dc.identifier.issn 1049-2275
dc.identifier.uri http://repositorio.unifesp.br/handle/11600/30659
dc.description.abstract Background: Surgically assisted rapid maxillary expansion is the treatment of choice for correcting transverse maxillary deficiency in patients with skeletal maturity, although the influence of the expander type on these alterations has not been elucidated yet.Objective: Determine the skeletal and dental transverse effects on the maxilla after completion of surgically assisted rapid maxillary expansion, with Haas and Hyrax expanders.Methods: Thirty-eight patients (aged between 118 and 39 years) were submitted to subtotal Le Fort I osteotomy and divided into Hass and Hyrax groups (19 patients each). Measurements of maxillary width, upper intermolar width, and its inclination on the posteroanterior cephalometric radiographs were obtained in the preoperatory period (T1), after the completion of the expansion (T2), and 4 months after the completion of the expansion (TU the intercusp and intergingival distances measured on the plaster models were obtained from the first premolars and molars, before expander cementation (M1) and after the expander removal (M2).Results: Both groups revealed statistically significant increase in the maxillary width, upper intermolar width, and inclination of the molars in T2 (P < 0.001); T3 showed a statistically significant decrease in the maxillary width and inclination of the molars (P < 0.001). the expansion presented an increment on the maxillary width of 71% from the upper intermolar width (T1 - T3), and molars had vestibular inclination (P < 0.05). the ratio of width increase of maxilla by the amount of device activation was of 69% for Haas and 74.5% for Hyrax.Conclusion: Clinically, the transversal effects were similar for both groups. en
dc.format.extent 718-725
dc.language.iso eng
dc.publisher Lippincott Williams & Wilkins
dc.relation.ispartof Journal of Craniofacial Surgery
dc.rights Acesso restrito
dc.subject palatal expansion technique en
dc.subject orthodontic appliances en
dc.subject cephalometry en
dc.title Transverse effects of surgically assisted rapid maxillary expansion: A comparative study using Haas and Hyrax en
dc.type Artigo
dc.contributor.institution Universidade Federal de São Paulo (UNIFESP)
dc.description.affiliation Universidade Federal de São Paulo, Div Plast Surg, BR-04024002 São Paulo, Brazil
dc.description.affiliationUnifesp Universidade Federal de São Paulo, Div Plast Surg, BR-04024002 São Paulo, Brazil
dc.identifier.doi 10.1097/SCS.0b013e31816aaa91
dc.description.source Web of Science
dc.identifier.wos WOS:000256245100028



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