Publication:
Early tooth movement with a clear plastic appliance in rats

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Issued Date

2009

Resource Type

Article

File Type

application/pdf

ISSN

8895406

DOI

10.1016/j.ajodo.2007.08.021

Other identifier(s)

2-s2.0-67649401763

Rights Holder(s)

มหาวิทยาลัยศรีนครินทรวิโรฒ

Bibliographic Citation

American Journal of Orthodontics and Dentofacial Orthopedics. Vol 136, No.1 (2009), p.75-82

Suggested Citation

Sombuntham N.P., Songwattana S., Atthakorn P., Jungudomjaroen S., Panyarachun B. Early tooth movement with a clear plastic appliance in rats. American Journal of Orthodontics and Dentofacial Orthopedics. Vol 136, No.1 (2009), p.75-82. doi:10.1016/j.ajodo.2007.08.021 Retrieved from: https://hdl.handle.net/20.500.14740/6020

Title

Early tooth movement with a clear plastic appliance in rats

Author(s)

Sombuntham N.P.
 Songwattana S.
 Atthakorn P.
 Jungudomjaroen S.
 Panyarachun B.

Abstract

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.

Subject(s)

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

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URI

https://hdl.handle.net/20.500.14740/6020

Collections

Scopus: Year 1983-2021

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