Age Effect on Orthodontic Tooth Movement in Rats

Orthodontic procedures seem to be more time-consuming in adults than in juveniles. This might be related to delay in the initial tissue response or to a slower turnover of the bone and periodontal ligament in adults. To study this problem, we studied orthodontic tooth movement in two groups of 30 ra...

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Bibliographic Details
Published in:Journal of dental research 2003-01, Vol.82 (1), p.38-42
Main Authors: Ren, Y., Maltha, J.C., Van ’t Hof, M.A., Kuijpers-Jagtman, A.M.
Format: Article
Language:English
Subjects:
Aging - physiology
Animals
Dentistry
Matched-Pair Analysis
Maxilla - physiology
Molar - physiology
Observer Variation
Orthodontic Appliance Design
Orthodontic Appliances
Orthodontic Wires
Random Allocation
Rats
Rats, Wistar
Reproducibility of Results
Statistics as Topic
Stress, Mechanical
Time Factors
Tooth Movement Techniques - instrumentation
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Summary:Orthodontic procedures seem to be more time-consuming in adults than in juveniles. This might be related to delay in the initial tissue response or to a slower turnover of the bone and periodontal ligament in adults. To study this problem, we studied orthodontic tooth movement in two groups of 30 rats, aged 6 wks and 9–12 mos, respectively. At one side of the maxilla, 3 molars together were moved mesially with a standardized orthodontic appliance delivering a force of 10 cN. The other side served as a control. The results showed a faster initial tooth movement in juvenile than in adult animals. However, once tooth movement had reached the linear phase, the rate of tooth movement was the same in both groups. The results indicate that, besides a delay in the onset of tooth movement in adult animals, tooth movement could be equally efficient in adults once it had started.
ISSN:0022-0345
1544-0591
DOI:10.1177/154405910308200109