_applied sciences_  
_Article_  
**Channel Erosion Reduction through Coupled Sodium Fluoride and Laser Treatments before Exposition in an Acid Environment: An In Vitro Randomized Control SEM Morphometric Analysis**  
**[PERSON] 1,*\({}^{\copyright}\), [PERSON] 1, [PERSON] 1,\({}^{\copyright}\), [PERSON] 1,*\({}^{\copyright}\), [PERSON] 1, [PERSON] 1\({}^{\copyright}\), [PERSON] 2\({}^{\copyright}\), [PERSON] 3, [PERSON] 3, [PERSON] 3\({}^{\copyright}\) and [PERSON] 4** \begin{tabular}{l l}
1 & Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Study of Campania, Luigi Vanvitelli, Via De Crecchio 6, 83138 Napoli, Italy; [EMAIL_ADDRESS] (R.F.); \\  & [EMAIL_ADDRESS] (M.S.); [PERSON] (V.G.) \\
2 & Department of Surgical Sciences, University of Turin, 10124 Torino, Italy; [EMAIL_ADDRESS] \\
3 & Advanced Material Laboratory, Department of Architecture and Industrial Design, University of Campania, Luigi Vanvitelli, 81031 Aversa, Italy; [EMAIL_ADDRESS] (R.A.); \\  & [PERSON](V.P.); [EMAIL_ADDRESS] (A.A.) \\
4 & Calabrodental Nursing Home, Marrelli Health, 88900 Crotone, Italy; [EMAIL_ADDRESS] \\  & * Correspondence: [EMAIL_ADDRESS] (F.E.); [PERSON], [PERSON]ADDRESS] (L.E.); \\  & [EMAIL_ADDRESS] (L.N.); Tel.: +39-3287522211 (F.E.); +39-3490493538 (L.F.); +39-3339233377 (L.N.) \\ \end{tabular}   
**Citation:** [PERSON]; [PERSON], [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON], [PERSON]; [PERSON], [PERSON]; [PERSON], [PERSON]; [PERSON], [PERSON]; [PERSON], [PERSON]; [PERSON], [PERSON]; et al. **Channel Erosion Reduction through Coupled Sodium Fluoride and Laser Treatments before Exposition in an Acid Environment: An In Vitro and Amplified Enamined Control SEM Morphometric Analysis.**_Appl. Sci._**2022**, 12, 1495. [[https://doi.org/10.3390/app12031495](https://doi.org/10.3390/app12031495)]([https://doi.org/10.3390/app12031495](https://doi.org/10.3390/app12031495))  
**Problemsion Reduction through Coupled Sodium Fluoride and Laser Treatments before Exposition in an Acid Environment: An In Vitro Randomized Control SEM Morphometric Analysis**  
**[PERSON] 1,*\({}^{\copyright}\), [PERSON] 1, [PERSON] 1,*\({}^{\copyright}\), [PERSON] 1,*\({}^{\copyright}\), [PERSON] 1, [PERSON] 1\({}^{\copyright}\), [PERSON] 2\({}^{\copyright}\), [PERSON] 3, [PERSON] 3, [PERSON] 3\({}^{\copyright}\) and [PERSON] 4** \begin{tabular}{l l}
1 & Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Study of Campania, [PERSON], Via De Crecchio 6, 83138 Napoli, Italy; [EMAIL_ADDRESS] (R.F.); \\  & [EMAIL_ADDRESS] (M.S.); [PERSON] (V.G.) \\
2 & Department of Surgical Sciences, University of Turin, 10124 Torino, Italy; [EMAIL_ADDRESS] \\
3 & Advanced Material Laboratory, Department of Architecture and Industrial Design, University of Campania, Luigi Vanvitelli, 81031 Aversa, Italy; [EMAIL_ADDRESS] (R.A.); \\  & [EMAIL_ADDRESS] (V.P.); [EMAIL_ADDRESS] (A.A.) \\
4 & Calabrodental Nursing Home, Marrelli Health, 88900 Crotone, Italy; [EMAIL_ADDRESS] \\  & * Correspondence: [EMAIL_ADDRESS] (F.E.); I, [PERSON]ADDRESS] (L.E.); \\  & [EMAIL_ADDRESS] (L.N.); Tel.: +39-3287522211 (F.E.); +39-34904943538 (L.F.); +39-3339233337 (L.N.) \\ \end{tabular}   
**Abstract:** (1) Background: Erosive lesions of dental enamel are steadily increasing owing to both the availability of exogenous acid and the production of endogenous acid. The aim of this study was to investigate the erosion-inhibiting potential of a diode laser irradiation and topical application of fluoride used alone or in combination on the enamel surface of extracted teeth before exposure to an acidic solution. (2) Methods: The four axial enamel surfaces of 40 healthy molars were used for four study groups: (A) no treatment; (B) application of fluoride gel for 120 s; (O) a diode laser application for 120 s; and (X) a combined laser/fluoride for 120 s. Each enamel surface was examined by SEM (scanning electron microscopy).