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Infrared light-emitting diode (led) effects on orthodontic tooth movement
Friedrichsdorf, Simone Peixe; Arana-Chavez, Victor Elias; Bradaschia-Correa, Vivian; Cattaneo, Paolo Maria; Dominguez, Gladys Cristina.
  • Friedrichsdorf, Simone Peixe; Universidade de São Paulo. School of Dentistry. Department of Orthodontics and Pediatric Dentistry. BR
  • Arana-Chavez, Victor Elias; Universidade de São Paulo. School of Dentistry. Department of Biomaterials and Oral Biology. BR
  • Bradaschia-Correa, Vivian; Universidade de São Paulo. School of Dentistry. Department of Biomaterials and Oral Biology. BR
  • Cattaneo, Paolo Maria; Aarhus University. Faculty of Health. Department of Dentistry. Aarhus. DK
  • Dominguez, Gladys Cristina; Universidade de São Paulo. School of Dentistry. Department of Orthodontics and Pediatric Dentistry. BR
Braz. dent. j ; 30(4): 410-416, July-Aug. 2019. tab, graf
Article in English | LILACS | ID: biblio-1011567
ABSTRACT
Abstract The present study aimed to analyze the effect of LED phototherapy on the presence of hyalinization and root resorption during orthodontic tooth movement (OTM) in rats and to measure the amount of tooth movement. Eighty rats were allocated into two groups LED and control (CON), where the LED rats were irradiated with infrared LED (850 nm, 30 mW) for 5 min during the first five days of OTM and where controls were not irradiated. Both groups were subdivided into four subgroups (n=10) according to the date of euthanasia (4, 7, 14 and 21 days). Five out of ten LED21 and five of ten CON21 rats were submitted to micro-computed tomography (μCT); μCT scans were taken on days 0, 7, 14 and 21. For histological study, maxillae were processed to light microscopy using Hematoxylin-Eosin (HE) and Tartrate-Resistant Acid Phosphatase (TRAP) histochemistry. The amount of tooth movement did not differ between LED and CON. Hyalinization was observed at the pressure areas in both groups, and it did not show a statistically significant difference between the groups. Root resorption was also observed in both groups after 7 days and it did not represent any differences between the two groups. LED phototherapy was not able to increase the amount of OTM. Similar characteristics of hyalinization and root resorption were observed in both groups.
RESUMO
Resumo O presente estudo tem como objetivo analisar o efeito da fototerapia LED na presença da hialinização e reabsorção radicular durante o movimento dentário ortodôntico (MDO) em ratos, e a mensuração da quantidade de movimento dentário. Oitenta ratos foram alocados em dois grupos LED e Controle (CON), os ratos foram irradiados com um LED infravermelho (850nm, 30mW) por 5 minutos durante os cinco primeiros dias da MDO; e o grupo controle não foi irradiado. Ambos os grupos foram subdivididos em 4 subgrupos (n=10) de acordo com a data da eutanásia (4, 7, 14 e 21 dias). Cinco dos dez ratos LED21 e cinco dos dez ratos CON21foram submetidos a microtomografia computadorizada (μCT); As μCT foram realizadas nos dias 0, 7, 14 e 21. Para o estudo histológico, as maxilas foram processadas para microscopia de luz, usando hematoxilina-eosina (HE) e Fosfatase ácido Tartrate-Resistente (TRAP) para histoquímica. A quantidade de movimento dentário não diferiu entre o LED e o CON. A hialinização foi observada nas áreas de pressão em ambos os grupos e não mostrou diferença estatisticamente significante. Reabsorção radicular também foi observada em ambos os grupos depois de 7 dias e não houve diferença entre os grupos. A fototerapia LED não aumentou a quantidade de MDO. Características similares de hialinização e reabsorção radicular foram observadas em ambos os grupos
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Full text: Available Index: LILACS (Americas) Main subject: Root Resorption / Tooth Movement Techniques Limits: Animals Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2019 Type: Article Affiliation country: Brazil / Denmark Institution/Affiliation country: Aarhus University/DK / Universidade de São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Root Resorption / Tooth Movement Techniques Limits: Animals Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2019 Type: Article Affiliation country: Brazil / Denmark Institution/Affiliation country: Aarhus University/DK / Universidade de São Paulo/BR