Abstract
The main objective of the present study was to evaluate the effect of low-level laser therapy (LLLT) in enhancing bone healing in irradiated alveolus post-tooth extraction. Sixty male Wistar rats (180 ± 10 g) were used in the present study. The left maxillary first molars were extracted, and the alveolar region was irradiated by diode laser device (GaAlAs) immediately after extraction and for more 3-day daily applications. The animals were randomly assigned into two groups: control group (n = 30, with left maxillary molar extraction—CG) and experimental group (n = 30, with tooth extraction and low-level laser therapy applied to the dental alveolus for 42 s—EG). These groups were divided into subgroups (five rats per subgroup) according to the observation time point—1, 2, 3, 5, 7, and 10 days—post-tooth extraction. The maxillary bone was separated, and the specimens were stained with hematoxylin and eosin, Masson’s trichrome, and picrosirius red and immunohistochemistry for RUNX-2. Parametric and nonparametric tests were used with a significance level of 5%. LLLT accelerated bone healing with mature collagen fiber bundles and early new bone formation. Histomorphometric analysis revealed an increase of osteoblast (RUNX-2) and osteoclast (TRAP) activity and in the area percentage of cancellous bone in the lased alveolus compared to the control group. This increase was statistically significant (p < 0.05). Application of LLLT with a GaAlAs diode laser device enhanced bone healing and mineralization on alveolar region.
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Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior (CAPES) had the role on funding the first author on the development of the present study. Fundaçao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) had the role on funding the manufacturer’s materials used by the authors on the present study.
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Ribeiro, L.N.S., de Figueiredo, F.A.T., da Silva Mira, P.C. et al. Low-level laser therapy (LLLT) improves alveolar bone healing in rats. Lasers Med Sci 37, 961–969 (2022). https://doi.org/10.1007/s10103-021-03340-y
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DOI: https://doi.org/10.1007/s10103-021-03340-y