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Comparative Effect of Glass Fiber and Nano‐Filler Addition on Denture Repair Strength
Author(s) -
Abushowmi Tahani H.,
AlZaher Zahra A.,
Almaskin Danah F.,
Qaw Masoumah S.,
Abualsaud Reem,
Akhtar Sultan,
AlThobity Ahmad M.,
AlHarbi Fahad A.,
Gad Mohammed M.,
Baba Nadim Z.
Publication year - 2020
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/jopr.13124
Subject(s) - flexural strength , materials science , izod impact strength test , composite material , charpy impact test , filler (materials) , acrylic resin , nano , universal testing machine , ultimate tensile strength , coating
Purpose To evaluate and compare the effects of glass fiber (GF), Zirconium oxide nanoparticles (nano‐ZrO 2 ), and silicon dioxide nanoparticles (nano‐SiO 2 ) addition on the flexural strength and impact strength of repaired denture base material. Materials and Methods Heat‐polymerized acrylic resin specimens were fabricated. All specimens were sectioned centrally and beveled creating 2.5 mm repair gap except for 10 controls. Specimen grouping ( n = 10/group) was done according to filler concentration of 0%, 0.25%, 0.5%, and 0.75% of auto‐polymerized acrylic powder. Modified resin was mixed, packed in the repair gap, polymerized, finished and polished. Three‐point bending test and Charpy type impact testing were done. Data were analyzed using one‐way‐ANOVA and Post‐Hoc Tukey test (α = 0.05). Results All additives significantly increased flexural strength and impact strength ( p < 0.05). Within the modified subgroups, no significant differences were found for GF. Significant increase for nano‐ZrO 2 and significant decrease for nano‐SiO 2 as the concentration of additive increased were noted for both flexural strength and impact strength. Highest flexural strength was found with 0.75%‐nano‐ZrO 2 (69.59 ± 2.52MPa) and the lowest was found with 0.75%‐nano‐SiO 2 (53.82 ± 3.10MPa). The 0.25%‐nano‐SiO 2 showed the highest impact strength value (2.54 ± 0.21 kJ/m 2 ) while the lowest impact strength value was seen with 0.75%‐nano‐SiO 2 (1.54 ± 0.17 kJ/m 2 ). Conclusion Nano‐filler effect was concentration dependent and its addition to repair resin increased the flexural and impact strengths. The incorporation of 0.75%‐ZrO 2 or 0.25%‐SiO 2 into repair resin proved to be a promising technique to enhance repair strength and avoid repeated fractures.