Fracture resistance of teeth submitted to several internal bleaching protocols
| Autor: | Carolina Andolfatto, Andrea Abi Rached Dantas, Edson Alves de Campos, Kátia Cristina Keine, Norberto Batista de Faria-Júnior, Renato de Toledo Leonardo, Milton Carlos Kuga, Flávia Angélica Guiotti |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Universidade Federal do Rio Grande do Norte (UFRN) |
| Rok vydání: | 2014 |
| Předmět: |
Dental Stress Analysis
Time Factors Dentistry Carbamide Peroxide chemistry.chemical_compound Random Allocation Tooth Fractures Borates Materials Testing Tooth Bleaching Animals Urea Low-Level Light Therapy Hydrogen peroxide Tooth Bleaching Agents General Dentistry Titanium Long axis Photosensitizing Agents business.industry Hydrogen Peroxide Peroxides Root Canal Therapy Compressive load chemistry Titanium dioxide nanoparticles Pulp (tooth) Nanoparticles Tooth bleaching Cattle Stress Mechanical Sodium perborate Activation method Carbamide peroxide Dental Pulp Cavity business |
| Zdroj: | Currículo Lattes Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 1526-3711 |
| Popis: | Aim The aim of this study was to evaluate the fracture resistance of teeth submitted to several internal bleaching protocols using 35% hydrogen peroxide (35HP), 37% carbamide peroxide (37CP), 15% hydrogen peroxide with titanium dioxide nanoparticles (15HPTiO2) photoactivated by LED-laser or sodium perborate (SP). Materials and methods After endodontic treatment, fifty bovine extracted teeth were divided into five groups (n = 10): G1—unbleached; G2—35HP; G3—37CP; G4—15HPTiO2 photoactivated by LED-laser and G5—SP. In the G2 and G4, the bleaching protocol was applied in 4 sessions, with 7 days intervals between each session. In the G3 and G5, the materials were kept in the pulp teeth for 21 days, but replaced every 7 days. After 21 days, the teeth were subjected to compressive load at a cross head speed of 0.5 mm/min, applied at 135° to the long axis of the root using an eletromechanical testing machine, until teeth fracture. The data were submitted to ANOVA and Tukey tests (á = 5%). Results The 35HP, 37CP, 15HPTiO2 and SP showed similar fracture resistance teeth reduction (p > 0.05). All bleaching treatments reduced the fracture resistance compared to unbleached teeth (p < 0.05). Conclusion All bleaching protocols reduced the fracture resistance of endodontically-treated teeth, but there were no differences between each other. Clinical significance There are several internal bleaching protocols using hydrogen peroxide in different concentrations and activation methods. This study evaluated its effects on fracture resistance in endodontically-treated teeth. How to cite this article de Toledo Leonardo R, Kuga MC, Guiotti FA, Andolfatto C, de Faria-Júnior NB, de Campos EA, Keine KC, Dantas AAR. Fracture Resistance of Teeth Submitted to Several Internal Bleaching Protocols. J Contemp Dent Pract 2014;15(2):186-189. |
| Databáze: | OpenAIRE |
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