Comparative Effect of Glass Fiber and Nano-Filler Addition on Denture Repair Strength.

Autor: Abushowmi TH; College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia., AlZaher ZA; College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia., Almaskin DF; College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia., Qaw MS; College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia., Abualsaud R; Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31411, Saudi Arabia., Akhtar S; Department of Biophysics, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31411, Saudi Arabia., Al-Thobity AM; Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31411, Saudi Arabia., Al-Harbi FA; Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31411, Saudi Arabia., Gad MM; Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31411, Saudi Arabia., Baba NZ; Advanced Specialty Education Program in Prosthodontics, Loma Linda University, School of Dentistry, CA.
Jazyk: angličtina
Zdroj: Journal of prosthodontics : official journal of the American College of Prosthodontists [J Prosthodont] 2020 Mar; Vol. 29 (3), pp. 261-268. Date of Electronic Publication: 2019 Nov 19.
DOI: 10.1111/jopr.13124
Abstrakt: 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.
(© 2019 by the American College of Prosthodontists.)
Databáze: MEDLINE
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