quantitative histological analysis of the mandibular branch of the facial nerve in rats análise histológica quantitativa do ramo mandibular do nervo facial em ratos

quantitative histological analysis of the mandibular branch of the facial nerve in rats análise histológica quantitativa do ramo mandibular do nervo facial em ratos

;Heloisa Juliana Zabeu Rossi Costa;Raquel Salomone;Ciro Ferreira da Silva;Márcio Paulino Costa;Beatriz Lucchetta Ramos;Ricardo Ferreira Bento
forensic science international 2012 Vol. 27 pp. 747-750
167
costa2012actaquantitative

Abstract

PURPOSE: To establish a model to quantitative histological analysis of the mandibular branch of the facial nerve in rats. METHODS: Eleven Wistar rats had their right and left mandibular branches of the facial nerve surgically removed and were sacrificed afterwards. Quantitative histological analysis was performed with: a) partial number of axons; b) partial area of the transversal cut of the nerve (9000μm²); c) partial density. The averages of partial density were obtained. The statistical study was established by Wilcoxon test (p=0.05). RESULTS: In relation to density of axons, comparison between sides shows no statistically significant difference (p=0.248; p=0.533). Mean partial density of distal and proximal samples was, respectively, 0.18 ± 0.02 and 0.19 ± 0.02 axons/μm². Comparison between proximal and distal samples shows no statistically significant difference (p=0.859; p=0.182). CONCLUSION: This study has successfully established a model to histological quantitative analysis of the mandibular branch of the facial nerve in rats.
OBJETIVO: Estabelecer um modelo para análise histológica quantitativa do ramo mandibular do nervo facial de ratos. MÉTODOS: Onze ratos Wistar tiveram os ramos mandibulares de seus nervos faciais direito e esquerdo removidos cirurgicamente, e submetidos à análise histológica quantitativa de suas regiões proximal e distal com: a) contagem total do número de axônios, b) medida da área parcial (9000μm²) de corte transversal do nervo, c) cálculo de densidade parcial (DP). RESULTADOS: Em relação à densidade dos axônios, a comparação entre os lados não mostrou diferença estatisticamente significativa (p=0,248; p=0,533). A densidade parcial média das amostras distais e proximais foi, respectivamente, 0,18 ± 0,02 e 0,19 ± 0,02 axônios/μm². A comparação entre as amostras proximais e distais não mostrou diferença estatisticamente significativa (p=0,859; p=0,182). CONCLUSÃO: Este estudo estabeleceu com sucesso um modelo de análise histológica quantitativa do ramo mandibular do nervo facial em ratos.

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