Fluoride and trimetaphosphate association as a novel approach for remineralization and antiproteolytic activity in dentin tissue

Autor(es)

Nunes, Gabriel Pereira ; Danelon, Marcelle ; Pessan, Juliano Pelim ; Capalbo, Leticia Cabrera ; Nunes Junior, Nilson Antonio ; Matos, Adriana Arruda ; Souza, Jose Antonio Santos ; Buzalaf, Marilia Afonso Rabelo ; Delbem, Alberto Carlos Botazzo

• Tipo de documento: Artigo Científico
• Fonte: ARCHIVES OF ORAL BIOLOGY; v. 142, p. 10-pg., 2022-07-25.

Resumo

Objective: The study evaluated the effect of solutions containing fluoride (F) and/or sodium trimetaphosphate (TMP) and F/TMP on the inhibition of MMP-2 and MMP-9, and on dentin remineralization in vitro. Design: Bovine root dentin blocks were prepared, and caries-like lesions were induced in two thirds of the surface. Blocks were then randomly divided into 13 groups/solutions (n = 10): Placebo; 0.3 %, 1 % and 3 % NaOH-hydrolyzed TMP; 0.3 %, 1 % and 3 % TMP; 250, 500 and 1100 ppm F; 250 ppm F + 0.3 % TMP; 500 ppm F + 1 % TMP and 1100 ppm F + 3 % TMP. One third of each specimen was treated with the respective solutions in pH-cycling. The mineral concentration (gHAp x cm-3 x mu m) was determined by computed X-ray micro -tomography, and data submitted to ANOVA and Student-Newman-Keuls' test (p < 0.05). The ability of the so-lutions to inhibit MMP-2 and MMP-9 activity was assessed by zymography. Results: F/TMP association led to less mineral loss in the deeper region of the lesion and reduced the depth of lesions when compared to its counterpart without TMP (p < 0.001). 3 % TMP (hydrolyzed or not), 500 ppm F and 1100 ppm F completely inhibited MMP-2 activity, while for MMP-9 such effects were only achieved by treatment with 1100 ppm F + 3 % TMP. Conclusion: Treatment with 1100 ppm F + 3 % TMP fully inhibits the gelatinolytic activity of MMPs-2 and -9 and shows greater remineralizing capacity in artificial caries lesions in dentin. However, hydrolyzing TMP does not improve its anti-proteolytic activity and its remineralizing capacity. (AU)

• Processo FAPESP: 18/19505-9 - Análise in vitro da capacidade de soluções contendo fluoreto e/ou trimetafosfato na remineralização da dentina e na inibição da atividade de metaloproteinases da matriz dentinária
• Beneficiário: Gabriel Pereira Nunes
• Modalidade de apoio: Bolsas no Brasil - Mestrado