Effect of strontium fluorophosphate bioactive glass on color, microhardness and surface roughness of bleached enamel

• Published in: Technology and health care Vol. 32; no. 1; pp. 285 - 292
• Main Authors: Yezdani, Shiza, Khatri, Monisha, Vidhya, Sampath, Mahalaxmi, Sekar
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.01.2024; Sage Publications Ltd
• Subjects: Bioglass; Biological activity; Biomechanics; Bleaching; Color; Dental Enamel; Diamond pyramid hardness; Enamel; Fluorides; Humans; Hydrogen peroxide; Hydrogen Peroxide - adverse effects; Mechanical properties; Phosphates; Remineralization; Strontium; Surface roughness; Teeth; Tooth Bleaching - adverse effects; Tooth Bleaching Agents - pharmacology; dental enamel; tooth bleaching; tooth remineralization; Bioglass; hydrogen peroxide
• ISSN: 0928-7329; 1878-7401; 1878-7401
• DOI: 10.3233/THC-230074

BACKGROUND: Undesirable effects of tooth bleaching can alter the biomechanical properties of enamel. OBJECTIVE: To determine the influence of strontium fluorophosphate bioactive glass (Sr-FPG) on color, microhardness and surface roughness of enamel bleached with 35% hydrogen peroxide. METHODS: The labial enamel of 36 extracted intact human anterior teeth were divided into 3 groups ( n = 12), group 1 (HP): bleaching with 35% hydrogen peroxide only, group 2 (Sr-HP): bleaching with Sr-FPG incorporated 35% hydrogen peroxide and group 3 (HP-SrFPG): bleaching with 35% hydrogen peroxide followed by remineralization with Sr-FPG. Four consecutive eight-minute applications of the bleaching gel were done twice in all the groups. Color change ( Δ E), microhardness and surface roughness were evaluated at baseline, post-bleaching and post-remineralization using spectrophotometer, Vickers hardness tester and profilometric analysis respectively. RESULTS: The mean Δ E among the groups was statistically similar ( p > 0.05). Bleaching with HP significantly reduced microhardness ( p < 0.05), whereas bleaching with Sr-HP and HP-SrFPG did not ( p > 0.05). Post-bleaching microhardness in Sr-HP was significantly higher than HP-SrFPG ( p < 0.05). An increased surface roughness was seen in Sr-HP bleached samples ( p < 0.05). CONCLUSION: The addition of Sr-FPG to hydrogen peroxide significantly improved enamel microhardness than its use post-bleaching. An increase in surface roughness was seen post-bleaching with HP and Sr-HP.