Author:
S Sajjan Girija,T Rishitha,P Bhupathi Arun,Varma K Madhu,Kumar Pulidindi Anil,CH Rajashekar,Rama Kumar M Sita,Durga I. Sai Lakshmi
Abstract
Introduction: Vital bleaching of teeth is associated with mineral loss and surface roughness leading to hypersensitivity. Aesthetic restorations are recommended after one week. Search is on for a suitable remineralizing material, which helps in instant adhesive bonding. Hence objective of the study is to evaluate the remineralizing efficacy of two concentrations of Silica doped Nanohydroxyapatite on bleached enamel. Methods: Enamel surfaces of 30 extracted human central incisors were divided into Part A: Unbleached enamel, Part B: Bleached enamel, Part C: Remineralized enamel. The samples were randomly divided into, Group 1: MI Paste Plus (Recaldent, USA), Group 2 and 3 for application of Dentin bonding agents (Tetric- n-bond, Ivoclar, Vivadent) mixed 0.2% and 0.8% Silica doped Nanohydroxyapatite (Sigma Aldrich, Bangalore, India). Post bleaching remineralizing agents were applied on part C. Surface roughness was evaluated with contact stylus profilometer and mineral content was evaluated with Energy dispersive X-Ray spectroscopy for three parts. Data were analysed using ANOVA and Post Hoc Tukey test with p ≤ 0.05. Results: Surface roughness values (Ra) were increased, and mineral loss (Ca:P) was observed after bleaching. After application of remineralizing agents, surface roughness was decreased with no significant value (p > 0.05) and a significant increase in mineral content of all three groups with a p < 0.05 was observed. Conclusion: Application of dentin bonding agent mixed with Silica doped Nanohydroxyapatite decreased surface roughness and improved remineralization of bleached enamel.
Publisher
Universiti Putra Malaysia
Reference26 articles.
1. 1. Hattab FN, Qudeimat MA, AL‐RIMAWI HS. Dental discoloration: an overview. Journal of Esthetic and Restorative Dentistry. 1999 Nov;11(6):291-310.doi: 10.1111/j.1708-8240.1999.tb00413.x
2. 2. Greenwall L. Tooth whitening: the last 25 years. International Dentistry-African Edition. 2016;6(22):66-74. http://www.moderndentistrymedia.com/mar_april2016/greenwall.pdf accessed on 10/2/2018
3. 3. Feliz-Matos L, Hernández LM, Abreu N. Dental bleaching techniques; hydrogen-carbamide peroxides and light sources for activation, an update. Mini review article. The Open Dentistry Journal. 2014; 8:264-8. doi: 10.2174/1874210601408010264
4. 4. Attia, M.L., Cavalli, V., Espírito Santo, A.M.D., Martin, A.A., D’Arce, M.B.F., Aguiar, F.H.B., Lovadino, J.R., Rego, M.A.D., Cavalcanti, A.N. and Liporoni. Effects of bleaching agents combined with regular and whitening toothpastes on surface roughness and mineral content of enamel. Photomedicine and Laser Surgery. 2015 33(7).378-83. doi: 10.1089/pho.2014.3835
5. 5. McCracken MS, Haywood VB. Demineralization effects of 10 percent carbamide peroxide. Journal of Dentistry. 1996 Nov 1;24(6):395-8. doi: 10.1016/0300-5712(95)00113-1