Abstract
The present study evaluated the protective effects that are induced by fluoride and Nd:YAG laser irradiation to control dentine erosion. One hundred and twenty bovine dentine slabs were eroded with citric acid twice a day for a total period of 15 days. At day 10, the samples were randomly assigned into eight groups: C (Control); F (Fluoride); L1 (Nd:YAG laser, 1 W, 100 mJ, 79.5 J·cm−2); L2 (Nd:YAG laser, 0.7 W, 70 mJ, 55.7 J·cm−2); L3 (Nd:YAG laser, 0.5 W, 50 mJ, 39.7 J·cm−2); F + L1; F + L2; and, F + L3. Optical Coherence Tomography images were collected from the surface of the samples in order to monitor the alterations that were induced by erosion and the effectiveness of each treatment using the Optical Attenuation Coefficient (OAC). OAC values that were calculated for samples from groups C, F, L1, L3, FL1, and FL3 indicated no protective effects against the progression of erosive lesions. Samples from L2 and FL2 groups presented OAC values, indicating that laser irradiation under this condition did not induce the formation of craters on dentine tissue and promoted sufficient chemical and morphological changes to avoid the progression of dentine erosion.
Highlights
Dental erosion is defined as the irreversible loss of mineralized tissue that is caused by acidic agents not involving bacteria [1]
The present study evaluated the protective effects of topical fluoride and Nd:YAG laser irradiation as methods to control dentine erosion based on the Optical Attenuation Coefficient (OAC) that was calculated from Optical
The potential applications of Nd:YAG laser irradiation for treating dental hypersensitiviy has been well demonstrated through many investigations over the last years [12]
Summary
Dental erosion is defined as the irreversible loss of mineralized tissue that is caused by acidic agents not involving bacteria [1]. Despite the options that are available to treat dental erosion, some studies have focused on preventive strategies in order to avoid demineralization and caries, such as the development of wireless biosensors that are able to monitor analytical parameters that are involved in the pathogenesis of tooth erosion (e.g., intra-oral pH) [2,6]. Localized heating that is induced by high intensity infrared laser irradiation promotes changes in the microstructure of dental tissues, preventing the appearance and progression of dental erosion [7,8]. The use of Nd:YAG laser (1064 nm) for caries prevention as well as for treating
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