Does the administration of meloxicam before head and neck radiotherapy reduce the risk of mandibular osteoradionecrosis? An animal model study
| Autor: | Matheus Lima Oliveira, Lourenço Correr-Sobrinho, Leonardo Vieira Peroni, Eduarda Helena Leandro Nascimento, Mayra Cristina Yamasaki, Deborah Queiroz Freitas, Benjamin Salmon, Gina Delia Roque-Torres |
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| Rok vydání: | 2021 |
| Předmět: |
Male
Molar medicine.medical_specialty Osteoradionecrosis medicine.medical_treatment Mandible Meloxicam 03 medical and health sciences 0302 clinical medicine Animal model Head and neck radiotherapy Animals Medicine Mandibular Diseases Rats Wistar General Dentistry business.industry Radiation-protective agents X-Ray Microtomography 030206 dentistry medicine.disease Pathophysiology Rats Surgery Radiation therapy Head and Neck Neoplasms 030220 oncology & carcinogenesis business medicine.drug |
| Zdroj: | Clinical Oral Investigations. 25:3739-3745 |
| ISSN: | 1436-3771 1432-6981 |
| Popis: | To assess whether the administration of meloxicam before head and neck radiotherapy reduces the risk of mandibular osteoradionecrosis in rats. Sixty male Wistar rats were randomly divided into 6 groups (n = 10) according to the meloxicam administration and radiation therapy: control (C), irradiated (I), single dose of meloxicam (M1), single dose of meloxicam and irradiated (M1I), triple dose of meloxicam (M3), triple dose of meloxicam and irradiated (M3I). Meloxicam was administrated (20 mg/kg per dose) 1 h before the radiation therapy (single dose of 20 Gy) and 24 h and 48 h after the radiation therapy for groups with two additional doses. Ten days after the radiation therapy, the three right mandibular molars were extracted from all rats, who were euthanatized after 21 or 35 days (n = 5 per group). The mandibles were assessed by macroscopic evaluation and micro-CT analysis. The right hemimandibles of the irradiated groups revealed macroscopic signs of osteoradionecrosis, and those of the non-irradiated groups revealed complete gingival healing. A significant delay in alveolar socket healing in all irradiated groups was observed in the micro-CT assessment regardless meloxicam treatment. The administration of meloxicam before head and neck radiotherapy does not reduce the risk of mandibular osteoradionecrosis when associated to dental extractions. Since meloxicam has been shown to be a potential radiation-protective agent, and osteoradionecrosis physiopathology is believed to be related to an inflammatory process, possible interactions are relevant to be investigated. |
| Databáze: | OpenAIRE |
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