Periodontal effects of rapid maxillary expansion with tooth-tissue-borne and tooth-borne expanders: A computed tomography evaluation

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorGarib, Daniela Gamba
dc.creatorHenriques, José Fernando Castanha
dc.creatorJanson, Guilherme
dc.creatorFreitas, Marcos Roberto de
dc.creatorFernandes, Adriano Yacubian
dc.date2014-05-27T11:21:52Z
dc.date2016-10-25T18:22:12Z
dc.date2014-05-27T11:21:52Z
dc.date2016-10-25T18:22:12Z
dc.date2006-06-01
dc.date.accessioned2017-04-06T01:18:47Z
dc.date.available2017-04-06T01:18:47Z
dc.identifierAmerican Journal of Orthodontics and Dentofacial Orthopedics, v. 129, n. 6, p. 749-758, 2006.
dc.identifier0889-5406
dc.identifierhttp://hdl.handle.net/11449/68892
dc.identifierhttp://acervodigital.unesp.br/handle/11449/68892
dc.identifier10.1016/j.ajodo.2006.02.021
dc.identifier2-s2.0-33744918064
dc.identifierhttp://dx.doi.org/10.1016/j.ajodo.2006.02.021
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/890202
dc.descriptionIntroduction: The force delivered during rapid maxillary expansion (RME) produces areas of compression on the periodontal ligament of the supporting teeth. The resulting alveolar bone resorption can lead to unwanted tooth movement in the same direction. The purpose of this study was to evaluate periodontal changes by means of computed tomography after RME with tooth-tissue-borne and tooth-borne expanders. Methods: The sample comprised 8 girls, 11 to 14 years old, with Class I or II malocclusions with unilateral or bilateral posterior crossbites Four girls were treated with tooth-tissue-borne Haas-type expanders, and 4 were treated with tooth-borne Hyrax expanders. The appliances were activated up to the full 7-mm capacity of the expansion screw. Spiral CT scans were taken before expansion and after the 3-month retention period when the expander was removed. One-millimeter thick axial sections were exposed parallel to the palatal plane, comprising the dentoalveolar area and the base of the maxilla up to the inferior third of the nasal cavity. Multiplanar reconstruction was used to measure buccal and lingual bone plate thickness and buccal alveolar bone crest level by means of the computerized method. Results and Conclusions: RME reduced the buccal bone plate thickness of supporting teeth 0.6 to 0.9 mm and increased the lingual bone plate thickness 0.8 to 1.3 mm. The increase in lingual bone plate thickness of the maxillary posterior teeth was greater in the tooth-borne expansion group than in the tooth-tissue-borne group. RME induced bone dehiscences on the anchorage teeth's buccal aspect (7.1 ± 4.6 mm at the first premolars and 3.8 ± 4.4 mm at the mesiobuccal area of the first molars), especially in subjects with thinner buccal bone plates. The tooth-borne expander produced greater reduction of first premolar buccal alveolar bone crest level than did the tooth-tissue-borne expander. © 2006 American Association of Orthodontists.
dc.languageeng
dc.relationAmerican Journal of Orthodontics and Dentofacial Orthopedics
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectadolescent
dc.subjectcephalometry
dc.subjectchild
dc.subjectclinical trial
dc.subjectcomparative study
dc.subjectcontrolled clinical trial
dc.subjectcontrolled study
dc.subjectdental care
dc.subjectfemale
dc.subjecthuman
dc.subjectinstrumentation
dc.subjectorthodontics
dc.subjectosteolysis
dc.subjectpathophysiology
dc.subjectperiodontal ligament
dc.subjectradiography
dc.subjectrandomized controlled trial
dc.subjectspiral computer assisted tomography
dc.subjectAdolescent
dc.subjectAlveolar Bone Loss
dc.subjectCephalometry
dc.subjectChild
dc.subjectDental Stress Analysis
dc.subjectFemale
dc.subjectHumans
dc.subjectOrthodontic Anchorage Procedures
dc.subjectPalatal Expansion Technique
dc.subjectPeriodontal Ligament
dc.subjectTomography, Spiral Computed
dc.titlePeriodontal effects of rapid maxillary expansion with tooth-tissue-borne and tooth-borne expanders: A computed tomography evaluation
dc.typeOtro


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