Effect of dexamethasone and nimesulide in osteochemonecrosis of jaw induced by zoledronic acid in rats
| Autor: | Oliveira, Camila Carvalho de |
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| Přispěvatelé: | Alves, Ana Paula Negreiros Nunes |
| Jazyk: | portugalština |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Repositório Institucional da Universidade Federal do Ceará (UFC) Universidade Federal do Ceará (UFC) instacron:UFC |
| Popis: | Bisphosphonate-associated osteonecrosis of the jaw (OMB) has no defined pathophysiology, but has been linked to proinflammatory events. Dexamethasone (DEX) and nimesulide (NIM), steroidal and nonsteroidal anti-inflammatory agents (AIs), respectively, reduce inflammation mediators. The aim of this study was to evaluate the effect of dexamethasone and nimesulide in the chemonecrosis on jawbone associated with zoledronic acid (AZ) in rats. OMB was induced in male Wistar rats (n=40) by AZ administration and by extraction of the first left molar (OMB groups). DEX (0.04, 0.4, 4 mg/kg) or saline was administered, by gavage, 24 h, or NIM (10.3 mg/kg), 24 h and 12 h before each infusion of ZA, for eight weeks. Controls groups (n=40) received just treatment with AIs or saline. The body mass variation and hematological analyses were conducted weekly. Surgical time and number of fractured roots were measured to assess the difficulty of dental extraction. After the sacrifice (day 70), jaws and organs were excised. Digital x-rays of the jaws were made to measure the suggestive radiolucent area of necrosis and, later, histological slides were made (hematoxylin-eosin) to histomorphometric analysis. Kidney, liver, spleen and stomach were weighed, to express the organ index, and, after, these were submitted to histological processing for histopathological analysis. The group OMB DEX 4 mg/kg presented higher surgical time compared to saline. Radiographic analysis showed higher radiolucent area in the OMB groups compared to controls (p |
| Databáze: | OpenAIRE |
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