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. 2013 May;10(3):337-42.

Effect of tramadol at different doses on orthodontic tooth movement and bone resorption in rats

Hossein Aghili  1 , Mahdjoube Goldani Moghadam, Soghra Yassaei, Amir Reza Fattahi Meybodi, Seyed Mohamad Ali Tabatabaei
Affiliations

Effect of tramadol at different doses on orthodontic tooth movement and bone resorption in rats

Hossein Aghili et al. Dent Res J (Isfahan). 2013 May.

Abstract

Background: Tramadol is an opioid agonist that has the potential of being abused. The aim of this study was to compare the effect of different doses of tramadol on orthodontic tooth movement (OTM) and bone resorption in rats.

Materials and methods: Forty-two male rats were assigned randomly to two experimental groups and one control group. Nickel-titanium coil springs were used to exert orthodontic force. The rats in the control group and experimental group-1, respectively, received a daily injection of 0.1 ml of normal saline and 10 mg/kg of tramadol for 14 days. The rats in experimental group-2 received 10 mg/kg of the same drug on days 1-4, 20 mg/kg on days 5-8, 40 mg/kg on days 9-12 and 60 mg/kg on days 13 and 14. OTM was measured on days 4, 8, 12, and 14. At the end of the experimental period, the rats were sacrificed. Histological analysis was also performed to evaluate the number of osteoclasts, osteoblasts, and Howship's lacunae.

Results: Statistical analysis with analysis of variance tests showed that the rats in experimental group-2 had significantly decreased OTM compared with the other two groups (P < 0.05), whereas OTM for the rats in experimental group-1 was comparable to that in the control group (P > 0.05). The histological evaluations did not show any significant difference among the groups (P > 0.05).

Conclusion: The effect of tramadol hydrochloride on OTM depends on the dosage used. High doses of the drug reduce the extent of OTM significantly.

Keywords: Orthodontic tooth movement; rat; tramadol.

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Conflict of interest statement

Conflict of Interest: None declared

Figures

Figure 1
Figure 1
Application of nickel–titanium closed-coil spring
Figure 2
Figure 2
The OTM–time curves of the study groups
Figure 3
Figure 3
A histopathological section of the upper first molar tooth in a rat (×100) showing osteocytes, osteoclasts, Howship's lacunae, and erythrocytes
See this image and copyright information in PMC

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