Hardness evaluation of PMMA reinforced with two different calcinations temperatures of ZrO2-Al2O3-SiO2 filler system

11th Joint Conference on Chemistry in Conjunction with the 4th Regional Biomaterials Scientific Meeting

材料科学;化学;生物科学

Hasratiningsih, Z.^1 ; Takarini, V.^1 ; Cahyanto, A.^1 ; Faza, Y.^1 ; Asri, L.A.T.W.^2 ; Purwasasmita, B.S.^2

Department of Dental Materials Science and Technology, Faculty of Dentistry, University of Padjadjaran, Sekeloa Selatan 1, Bandung

40132, Indonesia^1

Advanced Material Processing Laboratory, Department of Engineering Physics, Institute of Technology Bandung, Ganesha 10, Bandung

40132, Indonesia^2

关键词: Amorphous phasis;    Calcination temperature;    Calcinations temperature;    Crystalline particles;    Filler particles;    Fixed partial dentures;    Hardness increase;    ZrO2-Al2O3;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/172/1/012067/pdf
DOI  :  10.1088/1757-899X/172/1/012067

来源: IOP

【 摘 要 】

Polymethyl methacrylate (PMMA) is one of the materials used for the temporary crown while making fixed partial dentures. Unfortunately, it has low mechanical properties. This study aim's to improve PMMA hardness by adding ZrO2-Al2O3-SiO2filler system in two different calcination temperatures. Thirty-two disc form samples with 8mm diameter x 3mm thickness were made from two category-filler based that had been previously evaluated using Scanning Electron Microscope (SEM). Each category was divided into six groups of three respectively from a controlled and different concentrations of 7(A), 9(B), 11(C), 13(D), and 15(E) weight % of reinforced filler system, then tested with Vickers Hardness Tester. Filler particles that calcined at 550° can increase to 700° consist of fine crystalline and amorphous phases; however, the sample shows the highest hardness about 20,19 VHN even though the increase is only 7,5% compared to control. Meanwhile, the sample that calcined at 700°C exhibiting the highest hardness about 15,66 VHN corresponds to sample D, it has increased 25% compared to the control. This is correlated with microstructure result that has more growth crystalline particles. The results were analyzed by ANOVA which determined were not statistically significantly different (p2-Al2O3-SiO2filler system calcined at 700°C shows the highest hardness increase compare to calcination temperature 550-700°C. Although it is not significantly different.