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Article in Spanish | LILACS | ID: lil-746942

ABSTRACT

OBJETIVO: Los procesos destructivos del periodonto apical están en su mayoría mediados por proteasas específicas. Existe evidencia de que los niveles de metaloproteinasa de matriz extracelular-9 (MMP-9) en el fluido crevicular gingival (FCG) podrían reflejar la presencia de periodontitis apical asintomática (PAA). El objetivo de este estudio fue evaluar la actividad de MMP-9 durante la respuesta reparativa periapical en controles postendodóncicos entre una semana y 6 meses y en controles sanos. MATERIALES Y MÉTODOS: En este estudio prospectivo se incluyeron 28 pacientes con periodontitis apical asintomática, y se tomaron muestras de FCG a partir de dientes con PAA en línea base y controles postendodóncicos de una semana, uno, 3 y 6 meses. Adicionalmente se incluyeron controles contralaterales sanos. Las muestras se eluyeron y analizaron mediante gelatinogramas y densitometría. RESULTADOS: En pacientes con periodontitis apical asintomática se identificaron tanto la proforma como la forma activa de la MMP-9. Estas presentaron aumentos significativos en controles postendodóncicos de 3 y 6 meses con signos de reparación periapical. CONCLUSIONES: Los niveles de MMP-9 aumentaron significativamente en dientes con diagnóstico de PAA durante la fase reparativa. Estos resultados sugieren que MMP-9 también cumpliría un papel fisiológico durante la reparación periapical, que es susceptible de ser evaluado a través del análisis del FCG.


OBJECTIVE: Apical destructive periodontal processes are largely mediated by specific proteases. Evidence supports that the levels of extracellular matrix metalloproteinase-9 (MMP-9) could reflect the presence of asymptomatic apical periodontitis (AAP) in gingival crevicular fluid (GCF). The aim of this study was to evaluate the activity of MMP-9 during reparative response in periapical post endodontic controls between 1 week and 6 months later and in healthy controls. MATERIALS AND METHODS: A prospective study was performed on 28 patients with a diagnosis of AAP. GCF samples were taken from AAP teeth at baseline and post-endodontic controls at 1 week, 1, 3 and 6 months. Additional healthy contralateral controls were obtained, and samples were eluted and analyzed by densitometric scanning and gelatin zymography. RESULTS: In patients with asymptomatic apical periodontitis, both the pro form and the active form of MMP-9 were identified. These showed significant increases in post-endodontic controls at three and six months, with signs of periapical repairing. CONCLUSIONS: MMP-9 levels significantly increased in teeth diagnosed with AAP during the reparative phase. These results suggest that MMP-9 might be involved in the healing of apical tissues that might be reflected in GCF.


Subject(s)
Humans , Male , Adolescent , Adult , Periapical Periodontitis/enzymology , Periapical Periodontitis/therapy , Gingival Crevicular Fluid/enzymology , Matrix Metalloproteinase 9/metabolism
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