Effects of corticopuncture (CP) and low-level laser therapy (LLLT) on the rate of tooth movement and root resorption in rats using micro-CT evaluation
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Lasers in Medical Science
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The aim of this study was to compare the rate of tooth displacement, quantity of root resorption, and alveolar bone
changes in five groups: corticopuncture (CP), low-level laser therapy (LLLT), CP combined with LLLT (CP + LLLT),
control (C), and negative control (NC). A total of 60 half-maxilla from 30 male Wistar rats (10 weeks old) were
divided randomly into five groups: three (CP, LLLT, and CP + LLLT) test groups with different stimulation for
accelerated-tooth-movement (ATM), one control (C) group, and one negative control (NC) group with no tooth
movement. Nickel-titanium coil springs with 50 g of force were tied from the upper left and right first molars to
micro-implants placed behind the maxillary incisors. For the CP and CP + LLLT groups, two perforations in the
palate and one mesially to the molars were performed. For the LLLT and CP + LLLT groups, GaAlAs diode laser
was applied every other day for 14 days (810 nm, 100 mW, 15 s). The tooth displacements were measured directly
from the rat’s mouth and indirectly from microcomputer (micro-CT) tomographic images. Bone responses at the
tension and compression sites and root resorption were analyzed from micro-CT images. The resulting alveolar bone
responses were evaluated by measuring bone mineral density (BMD), bone volume fraction (BV/TV), and trabecular
thickness (TbTh). Root resorption crater volumes were measured on both compression and tension sides of mesial
and distal buccal roots. The tooth displacement in the CP + LLLT group was the greatest when measured clinically,
followed by the CP, LLLT, and control groups (C and NC), respectively (p <0.05). The tooth movements measured
from micro-CT images showed statistically higher displacement in the CP and CP + LLLT groups compared to the
LLLT and control groups. The BMD, BV/TV, and TbTh values were lower at the compression side and higher at the
tension side for all three test groups compared to the control group. The root resorption crater volume of the distal
buccal root was higher in the control group, followed by CP, LLLT, and CP + LLLT, mostly at the compression site.
Combining corticopuncture and low-level laser therapy (CP + LLLT) produced more tooth displacement and less root
resorption at the compression side. The combined technique also promoted higher alveolar bone formation at the
tension side.
Como referenciar
SUZUKI, SELLY S.; GARCEZ, AGUINALDO S.; REESE, PATRICIA O.; SUZUKI, HIDEO; RIBEIRO, MARTHA S.; MOON, WON. Effects of corticopuncture (CP) and low-level laser therapy (LLLT) on the rate of tooth movement and root resorption in rats using micro-CT evaluation. Lasers in Medical Science, v. 33, n. 4, p. 811-821, 2018. DOI: 10.1007/s10103-017-2421-5. Disponível em: http://repositorio.ipen.br/handle/123456789/28505. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.