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  • Title: Root caries lesions inhibition and repair using commercial high-fluoride toothpastes with or without tri-calcium phosphate and conventional toothpastes containing or not 1.5% arginine CaCO3: an in situ investigation.
    Author: de Amoêdo Campos Velo MM, Agulhari MAS, Rios D, Magalhães AC, Honório HM, Wang L.
    Journal: Clin Oral Investig; 2020 Jul; 24(7):2295-2304. PubMed ID: 31712981.
    Abstract:
    OBJECTIVES: This double-blind, crossover, and in situ study evaluated the effect of commercial high-F toothpastes with or without functionalized β-tri-calcium phosphate (fTCP) and conventional-F toothpaste containing or not 1.5% arginine-CaCO3 in preventing and repairing root caries-like lesions. METHODS: Twelve volunteers wore palatal appliances containing sound (S) and pre-demineralized (PD) bovine root dentin blocks in 4 phases of 14 days/each. They used F toothpastes, 3×/day: (i) 1,450 μg F/g (conventional-F); (ii) 1,450 μg F/g + 1.5% arginine-CaCO3 (conventional-F + arginine/CaCO3); (iii) 5,000 μg F/g (high-F); and (iv) 5,000 μg F/g (high-F + fTCP). Sucrose solution (20%) was dropped 8×/day on the S blocks. The demineralization in the S blocks and the remineralization in the PD ones were estimated by % of surface hardness difference (%SH-S) and % of SH recovery (%SHR-PD), respectively. Caries lesion area (ΔS) was determined in the blocks. Statistical analyses were performed by one-way ANOVA/Kruskal-Wallis and multiple comparisons tests (p < 0.05). RESULTS: Both high-F toothpastes presented similar effect to prevent early caries lesions and it was higher than conventional-F + arginine/CaCO3. All treatments resulted in significantly lower ΔS values compared with conventional-F toothpaste (p < 0.0001). High-F + fTCP showed non-significantly higher preventive and reversible effect compared to high-F. The effect of conventional-F + arginine/CaCO3 was similar to high-F and lower than high-F + fTCP in preventing and reverting in-deep caries lesions. CONCLUSIONS: Overall, high-F toothpastes seem to be more effective and interesting feasible strategy for both prevention and remineralization actions in root dentin. CLINICAL RELEVANCE: With the trend of increasing dentin root caries, this study brings new evidences about the preventive and repair effect of high-F toothpastes with or without fTCP in root caries and support the use of arginine in toothpastes.
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