Effects of different treatments on chemical and morphological features of eroded dentin

• Published in: Lasers in medical science Vol. 33; no. 7; pp. 1441 - 1446
• Main Authors: Moura, Sandra Kiss, Lopes, Carolina Cury, Trevelin, Livia Tosi, Matos, Adriana Bona, Martinez, Íssis Virgínia Luque, Estevam, Marcelo, Bussadori, Sandra Kalil
• Format: Journal Article
• Language: English
• Published: London Springer London 01.09.2018; Springer Nature B.V
• Subjects: Calcium - analysis; Demineralizing; Dental erosion; Dentin; Dentin - chemistry; Dentin - drug effects; Dentin - pathology; Dentistry; Drug Combinations; Erosion; Erosion control; Exposure; Fluorides - pharmacology; Humans; Lasers; Lasers, Solid-State - therapeutic use; Medicine; Medicine & Public Health; Molars; Nitrates - pharmacology; Optical Devices; Optics; Original Article; Phosphates - pharmacology; Phosphorus - analysis; Photonics; Quantum Optics; Repair; Semiconductor lasers; Spectrometry, X-Ray Emission; Teeth; Tooth Erosion - pathology; Toothpaste; Tubules; Variance analysis; YAG lasers; Dental erosion; Desensitizing agents; Laser
• ISSN: 0268-8921; 1435-604X
• DOI: 10.1007/s10103-018-2482-0

To evaluate the treatment of eroded dentin (Sensodyne Repair & Protect™, Er:YAG laser and combinations). The occlusal surfaces of 25 third molars were sectioned 1.5 mm in thickness. After an erosion cycle (5 min in demineralizing solution + 3 h in remineralizing solution; six cycles a day for 8 days), the samples were divided into five groups ( n  = 5): (E) erosion − control; (ES) erosion + Sensodyne Repair & Protect (NovaMin); (EL) erosion + Er:YAG laser (40 mJ, 10 Hz, 0.4 W, 50 μs, 3.1 J/cm 2 , 63 W/cm 2 ); (ELS) erosion + Er:YAG laser + Sensodyne; and (ESL) erosion + Sensodyne + Er:YAG laser. Following storage in ultrapure water (37 °C/14 days), the Ca/P ratio was evaluated by EDXRF and the morphology surfaces examined in SEM. The percentage of exposed dentin tubules was calculated. One-way analysis of variance and Tukey’s test at 5% were used to treat the data. The Ca/P ratio was higher in E and ES groups. More exposed dentin tubules were found in E group and less exposed tubules were found in the ES group ( p  < 0.0001). When the toothpaste and laser were combined, the number of occluded dentin tubules was higher when laser was performed first (ELS). A positive effect was found when the laser and toothpaste were combined.