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논문 기본 정보

자료유형
학술저널
저자정보
Sara Albasarah (College of Dentistry Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia) Hanan Al Abdulghani (College of Dentistry Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia) Nawarah Alaseef (College of Dentistry Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia) Faisal D. al-Qarni (Imam Abdulrahman Bin Faisal University) Sultan Akhtar (Imam Abdulrahman Bin Faisal University) Soban Q. Khan (Imam Abdulrahman Bin Faisal University) Ijlal Shahrukh Ateeq (Imam Abdulrahman Bin Faisal University) Mohammed M. Gad (Imam Abdulrahman Bin Faisal University)
저널정보
대한치과보철학회 The Journal of Advanced of Prosthodontics The Journal of Advanced of Prosthodontics 제13권 제4호
발행연도
2021.8
수록면
226 - 236 (11page)

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PURPOSE. This study aimed to evaluate the effect of incorporating zirconium oxide nanoparticles (nano-ZrO2) in polymethylmethacrylate (PMMA) denture base resin on flexural properties at different material thicknesses. MATERIALS AND METHODS. Heat polymerized acrylic resin specimens (N = 120) were fabricated and divided into 4 groups according to denture base thickness (2.5 mm, 2.0 mm, 1.5 mm, 1.0 mm). Each group was subdivided into 3 subgroups (n = 10) according to nano-ZrO2 concentration (0%, 2.5%, and 5%). Flexural strength and elastic modulus were evaluated using a three-point bending test. One-way ANOVA, Tukey’s post hoc, and two-way ANOVA were used for data analysis (α = .05). Scanning electron microscopy (SEM) was used for fracture surface analysis and nanoparticles distributions. RESULTS. Groups with 0% nano-ZrO2 showed no significant difference in the flexural strength as thickness decreased (P = .153). The addition of nano-zirconia significantly increased the flexural strength (P < .001). The highest value was with 5% nano-ZrO2 and 2 mm-thickness (125.4 ± 18.3 MPa), followed by 5% nano-ZrO2 and 1.5 mm-thickness (110.3 ± 8.5 MPa). Moreover, the effect of various concentration levels on elastic modulus was statistically significant for 2 mm thickness (P = .001), but the combined effect of thickness and concentration on elastic modulus was insignificant (P = .10). CONCLUSION. Reinforcement of denture base material with nano-ZrO2 significantly increased flexural strength and modulus of elasticity. Reducing material thickness did not decrease flexural strength when nano-ZrO2 was incorporated. In clinical practice, when low thickness of denture base material is indicated, PMMA/nano-ZrO2 could be used with minimum acceptable thickness of 1.5 mm.

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