A Histological Study Of Root-resected And Root-transected Rat Incisors When Eruption Ceases, Shortly Before They Are Exfoliated From The Socket.

dc.creatorMerzel, J J
dc.creatorDuarte Novaes, P P
dc.creatorFurlan, S S
dc.date2000-Apr
dc.date2015-11-27T12:22:50Z
dc.date2015-11-27T12:22:50Z
dc.date.accessioned2018-03-29T00:54:40Z
dc.date.available2018-03-29T00:54:40Z
dc.identifierArchives Of Oral Biology. v. 45, n. 4, p. 315-22, 2000-Apr.
dc.identifier0003-9969
dc.identifier
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/10708671
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/194666
dc.identifier10708671
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1294899
dc.descriptionResection of the odontogenic region or root transection of normal (impeded) rat lower incisors showed that eruption ceased from 1 to 13 weeks when the base of the resected teeth (87.5%) or of the distal segment of the transected ones (86%) reached the alveolar-crest region. When the operated teeth reached the crestal region, the enamel-related periodontal tissues were absent and the periodontal ligament (PDL) was the only periodontal tissue that remained. The PDL of the crestal region may be considered as mature PDL, showing a length of approx. 5-6 6 mm at the mesial face of the tooth, 4-5 mm at lingual face and 1 mm at distal face; from these limits towards the apical end of the socket the PDL becomes gradually immature. The mature PDL seems not to have a role in the process of tooth eruption. Several factors can be suggested to explain the more frequent retention, at the crestal region of the socket, of impeded rather than unimpeded incisors submitted to the same procedures. The connective tissue that develops between the base of the tooth and the bone that fills the alveolus may have more time to organize itself in impeded than in unimpeded teeth, which erupt at a faster rate; this tissue could support and retain the impeded operated teeth longer than the unimpeded ones. The decrease in the mechanical properties of the PDL in the unimpeded condition may ease the traumatic effects and lead to exfoliation. Eruption might be stopped by the increase in occlusal forces, per unit area of root surface, as the root becomes shorter; this effect is likely to be greater in impeded than unimpeded teeth.
dc.description45
dc.description315-22
dc.languageeng
dc.relationArchives Of Oral Biology
dc.relationArch. Oral Biol.
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectAlveolar Process
dc.subjectAnimals
dc.subjectBite Force
dc.subjectConnective Tissue
dc.subjectDental Enamel
dc.subjectIncisor
dc.subjectMale
dc.subjectMandible
dc.subjectOdontogenesis
dc.subjectPeriodontal Ligament
dc.subjectRats
dc.subjectRats, Wistar
dc.subjectTime Factors
dc.subjectTooth Eruption
dc.subjectTooth Exfoliation
dc.subjectTooth Socket
dc.subjectTooth, Impacted
dc.titleA Histological Study Of Root-resected And Root-transected Rat Incisors When Eruption Ceases, Shortly Before They Are Exfoliated From The Socket.
dc.typeArtículos de revistas


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