Efeito da reposição com melatonina no processo de reparo após reimplante dentário em ratos pinealectomizados: análise histomorfométrica

• Ano de defesa: 2015
• Autor(a) principal: Ribeiro, Eduardo Dias [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Reimplante dentário; Melatonina; Rato
• Link de acesso: http://hdl.handle.net/11449/127934; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/04-09-2015/000846983.pdf

In order to improve the prognosis of tooth replantation, several local factors were studied, seeking the development of a treatment protocol. However, little is known with regard to systemic factors. One such condition is the absence of melatonin, which can occur in people with nocturnal habits. In order to study the repair process of tooth replantation in pinealectomized rats with or without replacement of melatonin, 40 rats were divided into 4 groups of 10 animals. Group 1 (C): no pinealectomized animals and underwent replantation of right upper incisor. Group 2 (PNX): pinealectomized animals and submitted to the dental replantation. Group 3 (PNX-M): pinealectomized animals, submitted to replantation and melatonin supplementation. Group 4 (M): no pinealectomized animals, submitted to replantation and melatonin supplementation. After 47 days, the animals were euthanized and specimens containing the teeth were processed for obtaining blades that are stained with hematoxylin and eosin for histomorphological analysis. It was analyzed and quantified the occurrence of inflammatory resorption, replacement resorption, ankylosis and repair of periodontal ligament. It was found that the C and PNX groups were the most affected by root resorption (total resorption) (p = 0.0001). Group M was the least affected by inflammatory resorption (p = 0.0001). The PNX-M group was the least affected by the replacement resorption (p = 0.0029). The PNX group was presented the lower occurrence of periodontal ligament (p = 0.0001). Group M showed the best results of reintegration of the periodontal ligament (p = 0.0001)...