Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/15065
ชื่อเรื่อง: Early tooth movement with a clear plastic appliance in rats
ผู้แต่ง: Sombuntham N.P.
Songwattana S.
Atthakorn P.
Jungudomjaroen S.
Panyarachun B.
Keywords: dental alloy
nickel
plastic
titanium
titanium nickelide
animal
animal model
article
biomechanics
cementum
comparative study
dentin
instrumentation
jaw
male
mechanical stress
methodology
molar tooth
orthodontic device
orthodontics
osteoclast
osteolysis
pathology
periodontal disease
periodontal ligament
pressure
randomization
rat
Sprague Dawley rat
tooth cervix
tooth disease
tooth root
Alveolar Process
Animals
Biomechanics
Bone Resorption
Dental Alloys
Dental Cementum
Dentin
Male
Models, Animal
Molar
Nickel
Orthodontic Appliance Design
Orthodontic Brackets
Orthodontic Wires
Osteoclasts
Periodontal Ligament
Plastics
Pressure
Random Allocation
Rats
Rats, Sprague-Dawley
Root Resorption
Stress, Mechanical
Titanium
Tooth Apex
Tooth Cervix
Tooth Movement
Tooth Root
วันที่เผยแพร่: 2009
บทคัดย่อ: Introduction: In this preliminary study, we investigated early histologic changes of paradental tissues in response to a clear plastic appliance in rats. Methods: Fifteen rats were divided into 3 groups. Group I was the untreated controls; group II received a clear plastic appliance made from a model, with the maxillary left first molar repositioned mesially 0.5 mm from the origin; and group III had a closed-coil spring to move the molar mesially. Specimens were prepared in parasagittal sections, and changes in paradental tissues were evaluated on days 1, 4, and 7 by light microscopy. Results: In group II, the periodontal ligament (PDL) was compressed in the bifurcation and apical areas of the roots of the molar. On day 7, the PDL of the apical and distal aspects of the roots and the bifurcation area showed further compression, with the PDL of the roots stretched along the mesial side. In group III, a disorganized and compressed PDL in the mesial cervical half and interradicular septum was observed, and the stretched fibers were at the distal aspects of the roots after days 4 to 7. Conclusions: Early histologic changes in response to the clear plastic appliance were intrusion and distal tipping despite the intended mesial movement. In this rat model, the observed histologic changes were subject to the direction and magnitude of forces generated by the clear aligner. © 2009 American Association of Orthodontists.
URI: https://ir.swu.ac.th/jspui/handle/123456789/15065
https://www.scopus.com/inward/record.uri?eid=2-s2.0-67649401763&doi=10.1016%2fj.ajodo.2007.08.021&partnerID=40&md5=77557c5eb663df19d886f1f1307ee5b0
ISSN: 8895406
Appears in Collections:Scopus 1983-2021

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