Comparative Evaluation of Natural and Synthetic Remineralizing Agents on Early Enamel Lesions: An In Vitro Experimental Study

Abstract

Background: Early enamel lesions are potentially reversible because demineralization and remineralization are dynamic processes influenced by calcium, phosphate, fluoride, saliva, and topical remineralizing agents.[1–8] Objective: To compare the simulated remineralization performance of a negative control, a fluoride-based synthetic agent, two natural remineralizing agents, and a combination/test formulation using enamel microhardness, surface roughness, lesion depth, and percentage remineralization.[9–16]
Methods: Two hundred synthetic enamel-specimen records were equally allocated to five groups (n=40 each). Baseline microhardness, post-demineralization microhardness, post-treatment microhardness, surface microhardness recovery, surface roughness, lesion depth, mineral loss, remineralization percentage, final pH, and treatment duration were analyzed. One-way ANOVA with Tukey post-hoc testing was used for between-group comparisons.
Results: Mean post-treatment microhardness ranged from 235.13 ± 13.21 VHN in the negative control to 298.02 ± 11.71 VHN in the combination/test group. Overall differences were significant (F=132.27, p<0.001). Remineralization percentage also differed significantly among groups (F=45.68, p<0.001), with means of 65.88 ± 5.04%, 78.00 ± 4.91%, 74.06 ± 4.80%, 76.25 ± 5.11%, and 79.37 ± 5.04% for G1–G5, respectively. Lesion depth differed significantly (F=32.90, p<0.001), whereas final roughness showed a smaller but statistically significant overall difference (F=2.55, p=0.040).
Conclusion: In the synthetic dataset, the combination/test formulation produced the highest post-treatment microhardness and remineralization percentage, while the negative control showed the least favorable mineral recovery. These findings are hypothesis-generating and require validation using a real, prospectively designed in vitro experiment with identified natural agents, standardized protocols, and independent specimen-level measurements.