The reinforcing effect of nano-zirconia on the transverse strength of the repaired acrylic prosthesis base.

• Autor(a) principal: Rodrigues, Carla Vanessa
• Data de Publicação: 2021
• Outros Autores: Ruiz Rufino , Bianca
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Brazilian Journal of Implantology and Health Sciences
• Texto Completo: https://bjihs.emnuvens.com.br/bjihs/article/view/176
• topic: Nano-zircônia; Prótese; Resistência; Nano-zirconia; Prosthesis; Resistance

Objective. The aim of this study was to evaluate the effect of incorporating fiberglass, zirconia and nano-zirconia on the transverse strength of the base of repaired dental prostheses. Materials and methods. Eighty specimens of thermally polymerized acrylic resin were prepared and randomly divided into eight groups: one intact group (control) and seven repaired groups. One group was repaired with self-cured resin while the other six groups were repaired using self-cured resin reinforced with 2% by weight or 5% by weight of fiberglass, zirconia or nano-zirconia particles. A three-point bending test was used to measure transverse strength. The results were analyzed using SPSS and repeated measure ANOVA and post hoc test of least significance (LSD). Results.Among the repaired groups, it was found that the self-curing resin reinforced with 2 or 5% by weight of nano-zirconia had the highest transverse strength. Repairs with self-curing acrylic resin reinforced with 5% by weight of zirconia showed the lowest value of transverse strength. There was no significant difference between the groups repaired with unreinforced repair resin, 2% by weight of zirconia and fiberglass reinforced resin. Conclusion. Reinforcement of the repair material with nano-zirconia can significantly improve the transverse strength of some fractured dental prosthesis base polymers.