Ultrastructure of cementum and periodontal ligament after continuous intrusion in humans: a transmission electron microscopy study

Registro completo de metadados
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorFaltin, R. M.-
Autor(es): dc.creatorFaltin, K.-
Autor(es): dc.creatorSander, F. G.-
Autor(es): dc.creatorArana-Chavez, V. E.-
Data: dc.date2014-05-20T15:19:49Z-
Data: dc.date2014-05-20T15:19:49Z-
Data: dc.date2001-02-01-
Data de aceite: dc.date.accessioned2014-11-17T16:42:30Z-
Data de disponibilização: dc.date.available2014-11-17T16:42:30Z-
Data de envio: dc.date.issued2014-11-17-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1093/ejo/23.1.35-
Fonte completa do material: dc.identifierEuropean Journal of Orthodontics. Oxford: Oxford Univ Press, v. 23, n. 1, p. 35-49, 2001.-
Fonte completa do material: dc.identifier0141-5387-
Fonte completa do material: dc.identifierhttp://base.repositorio.unesp.br/handle/11449/31210-
Fonte completa do material: dc.identifier10.1093/ejo/23.1.35-
Fonte completa do material: dc.identifierWOS:000167781100004-
Fonte: dc.identifier.urihttp://www.educapes.capes.gov.br/handle/capes/57532-
Fonte: dc.identifier.urihttp://www.educapes.capes.gov.br/handlecapes/57532-
Descrição: dc.descriptionAn ultrastructural study of the cementum and periodontal ligament (PDL) changes after continuous intrusion with two different and controlled forces in humans was carried out.Twelve first upper premolars, at stage 10 of Nolla, orthodontically indicated for extraction from six patients (mean age 15.3) were used. They were divided into three experimental groups, distributed intra-individually as follows: control (not moved), continuously intruded for 4 weeks with 50 or 100 cN force, utilizing a precise biomechanical model with nickel titanium super-elastic wires (NiTi-SE), which were developed and calibrated individually. The teeth were extracted, fixed, decalcified, and conventionally processed for examination in a Jeol 100 CX II transmission electron microscope.Evident signs of degeneration of cell structures, vascular components, and extracellular matrix (EM) of cementum and PDL were observed in all the intruded teeth, with more severe changes towards an apical direction and in proportion to the magnitude of force applied. Resorptive areas and an irregular root surface of the intruded teeth were noticed, according to the same pattern described above. Concomitant, areas of repair were also revealed in the cementum and PDL although the magnitude of forces remained the same throughout the experimental period. Thus, a reduction of continuous force magnitude should be considered to preserve the integrity of tissues.-
Formato: dc.format35-49-
Idioma: dc.languageeng-
Publicador: dc.publisherOxford Univ Press-
Relação: dc.relationEuropean Journal of Orthodontics-
Direitos: dc.rightsclosedAccess-
Título: dc.titleUltrastructure of cementum and periodontal ligament after continuous intrusion in humans: a transmission electron microscopy study-
Tipo de arquivo: dc.typeoutro-
Aparece nas coleções:Repositório Institucional - Unesp

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