title: Assessment of the systemic effects of low-level laser therapy (LLLT) on thyroid hormone function in a rabbit model.
abstract: The aim of this study was to assess the effects of low-level laser therapy (LLLT) applied to a dental extraction socket on thyroid gland function in a rabbit model, based on serum triiodothyronine and thyroxine levels. Sixteen male New Zealand rabbits were randomly distributed into two groups: a control group (non-irradiated animals) and an experimental group (irradiated animals: one irradiation point in the extraction socket of the lower incisor). Animals in the experimental group were irradiated with an aluminium gallium arsenide diode laser (AlGaAs; wavelength 830 nm, 40 mW, CW laser), for 13 days, every 48 h, at a dose of 6 J/cm(2) per session, resulting in a total dose of 42 J/cm(2). Serum triiodothyronine and thyroxine levels were measured in both groups before extraction and on the last day of observation (day 15). There were no statistically significant differences between the groups in pre- and post-irradiation triiodothyronine and thyroxine values. With the irradiation protocol used in this study, LLLT did not affect thyroid function in rabbits as assessed by circulating serum triiodothyronine and thyroxine levels.
authors: Maxillofacial Surgery Department, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil.
authors: B
authors: B
authors: Fronza
authors: T
authors: T
authors: Somacal
authors: L
authors: L
authors: Mayer
authors: J F
authors: JF
authors: de Moraes
authors: M G
authors: MG
authors: de Oliveira
authors: J B B
authors: JB
authors: Weber
mesh_terms: D000818:Animals; D054023:Lasers, Semiconductor / Q000627:therapeutic use; D028022:Low-Level Light Therapy / Q000379:methods*; D008297:Male; D023421:Models, Animal; D011817:Rabbits; D011829:Radiation Dosage; D011897:Random Allocation; D013963:Thyroid Hormones / Q000097:blood / Q000528:radiation effects*; D013974:Thyroxine / Q000097:blood / Q000528:radiation effects; D014081:Tooth Extraction; D020390:Tooth Socket / Q000528:radiation effects; D014284:Triiodothyronine / Q000097:blood / Q000528:radiation effects
chemical_list: D013963:Thyroid Hormones; D014284:Triiodothyronine; D013974:Thyroxine