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. 2019 Feb 10;7(3):412-420.
doi: 10.3889/oamjms.2019.089. eCollection 2019 Feb 15.

Effects of Different Parameters of Diode Laser on Acceleration of Orthodontic Tooth Movement and Its Effect on Relapse: An Experimental Animal Study

Aya Ehab Elkattan  1 , Mostafa Gheith  2 , Mona Salah Fayed  3 , M Abo El Yazeed  4 , Abdel-Razik H Farrag  5 , Wagdy K B Khalil  6
Affiliations

Effects of Different Parameters of Diode Laser on Acceleration of Orthodontic Tooth Movement and Its Effect on Relapse: An Experimental Animal Study

Aya Ehab Elkattan et al. Open Access Maced J Med Sci. .

Abstract

Aim: Recent studies have demonstrated that low-level laser therapy (LLLT) can accelerate orthodontic tooth movement. However, there is still controversy about the optimum parameters that can cause acceleration. The present study was designed to examine two different doses of LLLT in the acceleration of orthodontic tooth movement and their effect on relapse.

Methods: An orthodontic appliance was designed to induce tooth movement on lower incisors of rabbits. The in-al-as diode laser was used to radiate different groups of rabbits according to a specific protocol. The amount of tooth movement was measured for 21 days, and then the orthodontic appliance was removed, and the relapse was measured till day 28.

Results: The amount of tooth movement was significantly greater in the group with irradiation of low dose in comparison with the high dose group and the control group. The relapse was greatest in the group of low dose irradiation and least in the control group.

Conclusion: The findings suggest that LLLT with a low dose accelerate the orthodontic tooth movement while LLLT with a high dose was not able to have the same effect. LLLT had a reverse effect on relapse tendency; an increase in the relapse tendency was seen with low dose irradiation.

Keywords: Acceleration of orthodontic tooth movement; Different parameters; Low-level laser therapy; Orthodontics; Relapse.

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Figures

Figure 1
Figure 1
The timeline diagram
Figure 2
Figure 2
The orthodontic appliance
Figure 3
Figure 3
a) Separator between incisors to open space for appliance; b) After separation; c) Orthodontic appliance fixed
Figure 4
Figure 4
Laser machine Biolase Epic X
Figure 5
Figure 5
LLLT application distal to the right and left incisors
Figure 6
Figure 6
a) Photo was taken using a digital camera and a scale; Image converted into actual scale image; c) Lines showing the exact measurement of the space
Figure 7
Figure 7
Mean (SD) of the distance from 0 to 3 days
Figure 8
Figure 8
Mean (SD) of the distance from 3 to 7 days
Figure 9
Figure 9
Mean (SD) of the distance from 7 to 15 days
Figure 10
Figure 10
Mean (SD) of the distance from 15 to 21 days
Figure 11
Figure 11
Coefficient of variation between the three groups during relapse
See this image and copyright information in PMC

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